sdk:examples: update gpio

Signed-off-by: liangkangnan <liangkangnan@163.com>

.gitignore

@@ -2,5 +2,5 @@
 *.o
 *.ko
 *.obj
-
-tools/gnu-mcu-eclipse-riscv-none-gcc-8.2.0-2.2-20190521-0004-win64
+*.bin
+*.dump

README.md

@@ -1,203 +1,143 @@
-与本项目配套的设计文档[《从零开始写RISC-V处理器》](https://liangkangnan.gitee.io/2020/04/29/%E4%BB%8E%E9%9B%B6%E5%BC%80%E5%A7%8B%E5%86%99RISC-V%E5%A4%84%E7%90%86%E5%99%A8/)，目前已经更新完第三章硬件篇，开始更新软件篇。
+# 1.概述
 
-# 1.初衷
+本分支是在bram分支的基础上进行改进的。
 
-本开源项目的初衷是本人想入门RISC-V，熟悉RISC-V的指令内容和汇编语法。
+改进的地方主要有：
 
-本人对RISC-V很感兴趣，很看好RISC-V的发展前景，觉得RISC-V就是CPU中的Linux。由于RISC-V是这两年才开始迅速发展的，因此关于RISC-V的学习参考资料目前还很少，特别是适合入门的资料，因此学习起来进度很缓慢，于是萌生了自己从零开始写RISC-V处理器核的想法。
+1. 开发环境切换到Linux(Ubuntu18.04)系统下；
+2. 仿真器使用verilator；
+3. 内部总线使用OBI总线(详细内容见doc/OBI-v1.0.pdf文档)；
+4. 增加指令trace功能；
+6. JTAG模块全面改进和优化，支持3个硬件断点，单步等功能，支持gdb调试；
+7. 增加静态分支预测功能；
 
-本人是一名FPGA小白，为了快速入门、深入掌握RISC-V，我开始了学习FPGA和verilog的"艰难"历程。我工作的内容是和嵌入式软件相关的，平时根本不会接触到FPGA，也不会用到RISC-V，因此只能用业余时间来学习RISC-V。
+# 2.使用方法
 
-网上有不少关于RISC-V的开源项目，但是大多都写得很"高深"，对于我这种小白来说学习起来是非常吃力的，不太适合入门。本项目目前的代码量非常少，是很简单易懂的，对于想入门RISC-V的同学来说是一个很好的参考，希望能够吸引更多的同学参与到RISC-V的学习中来，促进RISC-V的发展，如果能起到抛砖引玉的作用的话那就更好了，也许说是砖的话就有点夸大了，但哪怕是起到一颗沙子的作用，也就足矣。
+## 2.1安装gcc工具链
 
-# 2.介绍
+下载gcc工具链([百度云链接](https://pan.baidu.com/s/1iRiZoPnt9M1upXsUkvLEfA)，提取码：yaib)，使用下面的命令解压到/opt/riscv32目录下：
 
-本项目实现的是一个单核32位的小型RISC-V处理器核(tinyriscv)，采用verilog语言编写。设计目标是对标ARM Cortex-M3系列处理器。tinyriscv有以下特点：
+```
+sudo tar zxf tinyriscv-gcc-toolchain.tar.gz -C /
+```
 
-1. 支持RV32IM指令集，通过RISC-V指令兼容性测试；
-3. 采用三级流水线，即取指，译码，执行；
-4. 可以运行C语言程序；
-5. 支持JTAG，可以通过openocd读写内存(在线更新程序)；
-6. 支持中断；
-6. 支持总线；
-7. 支持FreeRTOS；
-8. 支持通过串口更新程序；
-9. 容易移植到任何FPGA平台(如果资源足够的话)；
+## 2.2下载代码
 
-项目中的各目录说明：
+下载本项目verilator分支的代码：
 
-**rtl**：该目录包含tinyriscv的所有verilog源码；
+```
+git clone -b verilator https://gitee.com/liangkangnan/tinyriscv.git
+```
 
-**sim**：该目录包含仿真批处理bat文件和脚本；
+## 2.3运行仿真
 
-**tests**：该目录包含测试程序源码，其中example目录为C语言程序例程源码，isa目录为RV32指令测试源码；
+打开终端，进入到sim目录下，执行以下的命令编译：
 
-**tools**：该目录包含编译汇编和C语言程序所需GNU工具链和将二进制文件转成仿真所需的mem格式文件的工具BinToMem，还有通过串口下载程序的脚本。BinToMem\_CLI.exe需要在cmd窗口下执行，BinToMem\_GUI.exe提供图形界面，双击即可运行；
+```
+make recompile
+```
 
-**pic**：存放图片；
+这个命令会重新编译整个rtl源码和sdk/examples/simple这个C语言例程。如果需要使用其他例程，可以用PROG参数指定，比如：
 
-**tb**：该目录包含仿真的testbench文件；
+```
+make PROG=/path/sdk/examples/hello_world/hello_world.mem recompile
+```
 
-**fpga**：存放FPGA相关文件，比如约束文件；
+执行以下命令运行仿真：
 
-tinyriscv的整体框架如下：
+```
+make run
+```
 
-![tinyriscv整体框架](./pic/arch.jpg)
+![make_run](./pic/make_run.png)
 
-tinyriscv目前外挂了6个外设，每个外设的空间大小为256MB，地址空间分配如下图所示：
+打开另一个终端，进入到tools/openocd目录下，运行openocd：
 
-<img src="./pic/addr_alloc.jpg" alt="地址空间分配" style="zoom:70%;" />
+```
+./openocd_linux -f ../../sim/remote_bitbang.cfg
+```
 
-# 3.CoreMark测试
+![openocd](./pic/openocd.png)
 
-目前tinyriscv在Xilinx Artix-7 35T FPGA平台(时钟50MHz)上运行CoreMark跑分程序的结果如下图所示：
+可以看到openocd已经连上了，可以使用telnet或者gdb进行调试了。
 
-![tinyriscv跑分](./pic/tinyriscv_coremark.png)
+### 2.3.1使用telnet进行调试
 
-可知，tinyriscv的跑分成绩为2.4。此成绩是基于指令在rom存储和数据在ram存储的情况下得出的，如果指令和数据都在ram的话跑分上3.0问题应该不大。
+再打开另一个终端，输入以下命令连接telnet：
 
-选了几款其他MCU的跑分结果如下图所示：
+```
+telnet localhost 4444
+```
 
-![其他MCU跑分结果](./pic/other_coremark.png)
+![telnet](./pic/telnet.png)
 
-更多MCU的跑分结果，可以到[coremark](https://www.eembc.org/coremark/scores.php)官网查询。
+然后就可以使用各种命令进行调试了。下面介绍一些常用的命令：
 
-# 4.如何使用
+**halt**：停住MCU，进入调试模式；
 
-本项目运行在windows平台，编译仿真工具使用的是iverilog和vpp，波形查看工具使用的是gtkwave。
+**resume**：MCU从停住的地方继续执行，退出调试模式；
 
-## 4.1安装环境
+**reset**：复位MCU，复位之后就开始执行。通常在下载完程序后使用该命令来运行程序；
 
-在使用之前需要安装以下工具：
+**reset halt**：复位MCU，然后停住MCU，即MCU停在复位地址处；
 
-1. 安装iverilog工具
+**bp 0x00000010 4 hw**：打断点，其中0x00000010是断点的地址，4表示地址长度为4个字节，hw表示硬件断点。tinyriscv只支持硬件断点。
 
-可以在这里[http://bleyer.org/icarus/](http://bleyer.org/icarus/)下载，安装过程中记得同意把iverilog添加到环境变量中，当然也可以在安装完成后手动进行添加。安装完成后iverilog、vvp和gtkwave等工具也就安装好了。
+**rbp 0x00000010**：删除0x00000010地址处的断点；
 
-2. 安装GNU工具链
+**bp**：查看所有断点信息；
 
-可以通过百度网盘下载(链接: https://pan.baidu.com/s/1bYgslKxHMjtiZtIPsB2caQ 提取码: 9n3c)，或者通过微云下载[https://share.weiyun.com/5bMOsu9](https://share.weiyun.com/5bMOsu9)，下载完成后将压缩包解压到本项目的tools目录下。注意目录的层次结构，解压后的工具路径应该如下所示：
+**step**：单步执行，每次执行一条指令；
 
-`tinyriscv\tools\gnu-mcu-eclipse-riscv-none-gcc-8.2.0-2.2-20190521-0004-win64\bin\riscv-none-embed-gcc`
+**mww 0x00000010 0x1234**：即memory write word，往0x00000010地址处写入0x1234，长度为4个字节；
 
-3. 安装make工具
+**mdw 0x00000010 2**：即memory display word，从0x00000010地址处读取2个word；
 
-可以通过百度网盘下载(链接: https://pan.baidu.com/s/1nFaUIwv171PDXuF7TziDFg 提取码: 9ntc)，或者通过微云下载[https://share.weiyun.com/59xtmWR](https://share.weiyun.com/59xtmWR)，下载完成后直接解压，然后将make所在的路径添加到环境变量里。
+**reg sp**：读取sp寄存器的值；
 
-4. 安装python3
+**reg sp 0x10**：往sp寄存器写入0x10；
 
-到[python官网](https://www.python.org/)下载win版本的python，注意要下载python3版本的。网速慢的同学可以通过百度网盘下载(链接: https://pan.baidu.com/s/1gNC8L5dZTsN6E5TJD2rmnQ 提取码: 3b4t)，或者通过微云下载[https://share.weiyun.com/XwzSQHND](https://share.weiyun.com/XwzSQHND)。安装完后将python添加到环境变量里。
+**load_image**：加载image文件，比如：load_image filename address bin min_address max_length，其中filename表示要加载的文件，address表示要加载到哪个地址，bin表示文件的类型，min_address表示最小地址，该值与address相同即可，max_length表示文件的最大长度。目前使用这个命令来下载C语言程序。
 
-5. 下载代码
+**verify_image**：比如：verify_image filename offset，其中filename表示已经下载了的文件，offset表示从哪个地址开始校验。使用这个命令来校验下载进去的程序是否正确。
 
-使用git clone命令下载，不要使用zip方式下载，否则有些文件会有格式问题。
+**load_bin**：如果觉得load_image命令的参数比较多，可以使用load_bin命令，比如：load_bin bin_file 0x0 1，表示将bin_file二进制文件下载到0x0地址处，并且校验。
 
-`git clone https://gitee.com/liangkangnan/tinyriscv.git`
+### 2.3.2使用gdb进行调试
 
-## 4.2运行指令测试程序
+除了使用telnet进行调试之外，还可以使用gdb进行调试，这也是大部分IDE（eclipse等）所使用的调试方式。
 
-### 4.2.1 运行旧的指令测试程序
+openocd连上之后，打开另一个终端，执行以下命令运行gdb：
 
-旧的指令测试程序属于比较早的指令兼容性测试方法，虽然目前RISC-V官方已经不更新了，但仍然是一个比较好的测试参考。
+```
+/opt/riscv32/bin/riscv32-unknown-elf-gdb ~/tinyriscv/sdk/examples/simple/simple
+```
 
-下面以add指令为例，说明如何运行旧的指令测试程序。
+接着，设置一下超时时间：
 
-打开CMD窗口，进入到sim目录，执行以下命令：
+```
+set remotetimeout 2000
+```
 
-```sim_new_nowave.bat ..\tests\isa\generated\rv32ui-p-add.bin inst.data```
+连接openocd服务：
 
-如果运行成功的话就可以看到&quot;PASS&quot;的打印。其他指令使用方法类似。
+```
+target remote localhost:3333
+```
 
-![](./pic/test_output.png)
+加载程序：
 
-也可以一次性对所有指令进行测试，方法如下。
+```
+load
+```
 
-打开CMD窗口进入到sim目录下，执行以下命令：
+之后就可以用gdb命令来调试了，比如打印mul变量的值：
 
-`python .\test_all_isa.py`
+```
+print mul
+```
 
-### 4.2.2运行新的指令测试程序
+![gdb](./pic/gdb.png)
 
-新的指令兼容性([riscv-compliance](https://github.com/riscv/riscv-compliance))测试项相对于旧的指令兼容性测试项来说对指令的测试更加严谨，可以精确到每一条指令的运行结果，而且RISC-V官方一直在更新。
-
-下面以add指令为例，说明如何运行新的指令测试程序。
-
-打开CMD窗口，进入到sim/compliance_test目录，执行以下命令：
-
-`python compliance_test.py ..\..\tests\riscv-compliance\build_generated\rv32i\I-ADD-01.elf.bin inst.data`
-
-如果运行成功的话就可以看到&quot;PASS&quot;的打印。其他指令使用方法类似。
-
-![new_test_output](./pic/new_test_output.png)
-
-## 4.3运行C语言程序
-
-C语言程序例程位于tests\example目录里。
-
-下面以simple程序为例进行说明。
-
-首先打开CMD窗口，进入到tests\example\simple目录，执行以下命令清除旧的目标文件：
-
-`make clean`
-
-然后重新编译：
-
-`make`
-
-编译成功之后，进入到sim目录，执行以下命令开始测试：
-
-` .\sim_new_nowave.bat ..\tests\example\simple\simple.bin inst.data`
-
-# 5.移植到FPGA
-
-详细的移植方法请查看本项目下的fpga目录中的README.md文件。
-
-# 6.未来计划
-
-1. 写设计文档；
-2. 优化资源和功耗(主要是译码和执行部分)；
-3. 支持硬件中断嵌套和快速实时中断；
-4. ......
-
-# 7.更新记录
-
-2020-07-04：支持通过UART烧写固件；
-
-2020-05-27：增加新的指令兼容性(riscv-compliance)测试项。
-
-2020-05-05：支持spi master，增加spi测试例程。
-
-2020-04-25：支持FreeRTOS(v10.3.1)。
-
-2020-04-18：适当添加代码注释；优化中断管理模块。
-
-2020-04-11：增加CoreMark跑分例程和跑分成绩。
-
-2020-04-05：支持CSR指令。
-
-2020-03-29：重大更新，主要更新如下：
-
-1. 支持RIB(RISC-V Internal Bus)总线；
-2. 优化乘法代码，节省了2/3的DSP资源；
-3. 优化除法代码，解决了除法模块的BUG；
-4. 完善C语言例程、启动代码和链接脚本；
-5. 增加一次性对所有指令进行测试的脚本；
-
-2020-03-08：支持中断，为此增加了timer模块来验证。
-
-2020-03-01：支持JTAG，配合openocd可进行内存读写。JTAG文档参考[深入浅出RISC-V调试](https://liangkangnan.gitee.io/2020/03/21/深入浅出RISC-V调试/)。
-
-2020-02-23：支持在Xilinx Artix-7平台上运行。详见[tinyriscv_vivado](https://gitee.com/liangkangnan/tinyriscv_vivado)。
-
-2020-01-13：支持RV32M的除法指令。其C语言实现详见[div](https://gitee.com/liangkangnan/div)。
-
-2020-01-02：支持RV32M的乘法指令。
-
-2019-12-06：第一次发布。
-
-# 8.其他
-
-如有疑问或者建议，欢迎在下方评论、或者私信、或者发邮件(liangkangnan@163.com)给我，24小时内必回复。
-
-如果您热爱RISC-V或者对RISC-V感兴趣，欢迎发邮件或者私信我，我把您拉进群里面交流RISC-V相关的技术。
+注意，如果要用gdb进行调试，则编译C程序时必须加上-g参数。
 

fpga/README.md

@@ -1,12 +1,12 @@
 # 1.概述
 
-介绍如何将tinyriscv移植到FPGA平台上和如何通过JTAG或者UART下载程序到FPGA。
+介绍如何将tinyriscv移植到FPGA平台上和如何通过JTAG下载程序到FPGA。
 
 1.软件：xilinx vivado(以2018.1版本为例)开发环境。
 
 2.FPGA：xilinx Artix-7 35T。
 
-3.调试器：CMSIS-DAP或者DAPLink。
+3.调试器：CMSIS-DAP或者DAPLink（要带JTAG功能）。
 
 这里只是以Xilinx平台为例，实际上可以移植到任何FPGA平台（只要资源足够）。
 
@@ -66,6 +66,8 @@
 
 勾选上红色框里那两项，然后点击Finish按钮。
 
+最后，还要添加顶层文件，即fpga/xilinx/perf-v/tinyriscv_soc_top.sv文件。
+
 至此，RTL源文件添加完成。
 
 ## 2.3添加约束文件
@@ -82,7 +84,7 @@
 
 ![](./images/add_src_6.png)
 
-点击Add Files按钮，选择tinyriscv项目里的FPGA/constrs/tinyriscv.xdc文件，如下图所示：
+点击Add Files按钮，选择tinyriscv项目里的fpga/xilinx/perf-v/constrs/tinyriscv.xdc文件，如下图所示：
 
 ![](./images/add_src_7.png)
 
@@ -156,9 +158,9 @@
 
 打开一个CMD窗口，然后cd进入到tinyriscv项目的tools/openocd目录，执行命令：
 
-`openocd.exe -f tinyriscv.cfg`
+`openocd_win.exe -f tinyriscv_cmsisdap_jtag.cfg`
 
-如果执行成功的话则会如下图所示：
+如果执行成功的话则会如下图所示（由于项目一直在更新，图片上的信息可能会跟实际的不一致，以文字描述为准）：
 
 ![openocd](./images/openocd.png)
 
@@ -166,55 +168,29 @@
 
 `telnet localhost 4444`
 
-然后在这个CMD窗口下使用load_image命令将固件下载到FPGA，这里以freertos.bin文件为例，如下所示：
+然后在这个CMD窗口下使用load_bin命令将固件下载到FPGA的ROM里（掉电会消失），这里以freertos.bin文件为例，如下所示：
 
-`load_image D:/gitee/open/tinyriscv/tests/example/FreeRTOS/Demo/tinyriscv_GCC/freertos.bin 0x0 bin 0x0 0x1000000`
+`load_bin D:/gitee/open/tinyriscv/tests/example/FreeRTOS/Demo/tinyriscv_GCC/freertos.bin 0x0 1`
 
-使用verify_image命令来校验是否下载成功，如下所示：
+load_bin命令用法：
 
-`verify_image D:/gitee/open/tinyriscv/tests/example/FreeRTOS/Demo/tinyriscv_GCC/freertos.bin 0x0`
+`load_bin file address verify[0|1]`
 
-如果下载出错的话会有提示的，没有提示则说明下载成功。
+file：表示要下载的bin文件
+
+address：表示要下载的地址
+
+verify：表示是否检验，1：校验，0：不校验
 
 最后执行以下命令让程序跑起来：
 
 `resume 0`
 
+或者
+
+`reset`
+
+或者短按一下开发板上的复位按键。
+
 **注意：每次下载程序前记得先执行halt命令停住CPU。**
 
-## 3.2通过UART方式下载
-
-通过UART方式下载前需要先使能UART debug模块。在约束文件里指定的uart_debug_en引脚，当其输入为高电平时表示使能UART debug模块，输入为低电平时表示关闭UART debug模块。
-
-当使能了UART debug模块后，就可以通过tools/tinyriscv_fw_downloader.py脚本来下载程序。
-
-tinyriscv_fw_downloader.py脚本使用方法：
-
-`python tinyriscv_fw_downloader.py 串口号 bin文件`
-
-打开CMD窗口，进入到tools目录，比如输入以下命令：
-
-![uart_debug](./images/uart_debug.png)
-
-即可下载freertos.bin程序到软核里。下载完后，先关闭UART debug模块，然后按板子上的复位(rst)按键即可让程序跑起来。
-
-# 4.Vivado仿真设置
-
-如果要在vivado里进行RTL仿真的话，还需要添加tb目录里的tinyriscv_soc_tb.v文件，具体方法和添加RTL源文件类似，只是在源文件类型里选择simulation sources，如下图所示：
-
-![add_sim](./images/add_sim.png)
-
-最后设置一下define.v文件的路径，如下图所示：
-
-![defines](./images/defines.png)
-
-最后，还要指定inst.data文件的路径，即修改tinyriscv_soc_tb.v文件里的下面这一行：
-
-```
-    // read mem data
-    initial begin
-        $readmemh ("F://yourpath/inst.data", tinyriscv_soc_top_0.u_rom._rom);
-    end
-```
-
-设置完成后，即可进行RTL仿真。

fpga/constrs/tinyriscv.xdc

@@ -1,81 +0,0 @@
-# 时钟约束50MHz
-set_property -dict { PACKAGE_PIN N14 IOSTANDARD LVCMOS33 } [get_ports {clk}]; 
-create_clock -add -name sys_clk_pin -period 20.00 -waveform {0 10} [get_ports {clk}];
-
-# 时钟引脚
-set_property IOSTANDARD LVCMOS33 [get_ports clk]
-set_property PACKAGE_PIN N14 [get_ports clk]
-
-# 复位引脚
-set_property IOSTANDARD LVCMOS33 [get_ports rst]
-set_property PACKAGE_PIN L13 [get_ports rst]
-
-# 程序执行完毕指示引脚
-set_property IOSTANDARD LVCMOS33 [get_ports over]
-set_property PACKAGE_PIN M16 [get_ports over]
-
-# 程序执行成功指示引脚
-set_property IOSTANDARD LVCMOS33 [get_ports succ]
-set_property PACKAGE_PIN N16 [get_ports succ]
-
-# CPU停住指示引脚
-set_property IOSTANDARD LVCMOS33 [get_ports halted_ind]
-set_property PACKAGE_PIN P15 [get_ports halted_ind]
-
-# 串口下载使能引脚
-set_property IOSTANDARD LVCMOS33 [get_ports uart_debug_pin]
-set_property PACKAGE_PIN K13 [get_ports uart_debug_pin]
-
-# 串口发送引脚
-set_property IOSTANDARD LVCMOS33 [get_ports uart_tx_pin]
-set_property PACKAGE_PIN M6 [get_ports uart_tx_pin]
-
-# 串口接收引脚
-set_property IOSTANDARD LVCMOS33 [get_ports uart_rx_pin]
-set_property PACKAGE_PIN N6 [get_ports uart_rx_pin]
-
-# GPIO0引脚
-set_property IOSTANDARD LVCMOS33 [get_ports {gpio[0]}]
-set_property PACKAGE_PIN P16 [get_ports {gpio[0]}]
-
-# GPIO1引脚
-set_property IOSTANDARD LVCMOS33 [get_ports {gpio[1]}]
-set_property PACKAGE_PIN T15 [get_ports {gpio[1]}]
-
-# JTAG TCK引脚
-set_property IOSTANDARD LVCMOS33 [get_ports jtag_TCK]
-set_property PACKAGE_PIN N11 [get_ports jtag_TCK]
-
-#create_clock -name jtag_clk_pin -period 300 [get_ports {jtag_TCK}];
-
-# JTAG TMS引脚
-set_property IOSTANDARD LVCMOS33 [get_ports jtag_TMS]
-set_property PACKAGE_PIN N3 [get_ports jtag_TMS]
-
-# JTAG TDI引脚
-set_property IOSTANDARD LVCMOS33 [get_ports jtag_TDI]
-set_property PACKAGE_PIN N2 [get_ports jtag_TDI]
-
-# JTAG TDO引脚
-set_property IOSTANDARD LVCMOS33 [get_ports jtag_TDO]
-set_property PACKAGE_PIN M1 [get_ports jtag_TDO]
-
-# SPI MISO引脚
-set_property IOSTANDARD LVCMOS33 [get_ports spi_miso]
-set_property PACKAGE_PIN P1 [get_ports spi_miso]
-
-# SPI MOSI引脚
-set_property IOSTANDARD LVCMOS33 [get_ports spi_mosi]
-set_property PACKAGE_PIN N1 [get_ports spi_mosi]
-
-# SPI SS引脚
-set_property IOSTANDARD LVCMOS33 [get_ports spi_ss]
-set_property PACKAGE_PIN M5 [get_ports spi_ss]
-
-# SPI CLK引脚
-set_property IOSTANDARD LVCMOS33 [get_ports spi_clk]
-set_property PACKAGE_PIN N4 [get_ports spi_clk]
-
-set_property BITSTREAM.CONFIG.SPI_BUSWIDTH 4 [current_design]  
-set_property CONFIG_MODE SPIx4 [current_design] 
-set_property BITSTREAM.CONFIG.CONFIGRATE 50 [current_design]

fpga/xilinx/cmod_a7/.gitignore

@@ -0,0 +1,7 @@
+out/
+.Xil/
+*.log
+*.html
+*.xml
+
+

fpga/xilinx/cmod_a7/Makefile

@@ -0,0 +1,30 @@
+VIVADO_BASE := /home/ubuntu/Xilinx/Vivado/2018.1/bin
+VIVADO := $(VIVADO_BASE)/vivado
+
+VIVADOFLAGS := \
+	-nojournal -mode batch \
+	-source scripts/init.tcl
+
+.PHONY: synth
+synth:
+	$(VIVADO) $(VIVADOFLAGS) -source scripts/synth.tcl
+
+.PHONY: impl
+impl:
+	$(VIVADO) $(VIVADOFLAGS) -source scripts/synth.tcl -source scripts/impl.tcl
+
+.PHONY: bit
+bit:
+	$(VIVADO) $(VIVADOFLAGS) -source scripts/synth.tcl -source scripts/impl.tcl -source scripts/bit.tcl -source scripts/report.tcl
+
+.PHONY: bin
+bin:
+	$(VIVADO) $(VIVADOFLAGS) -source scripts/synth.tcl -source scripts/impl.tcl -source scripts/bit.tcl -source scripts/bin.tcl -source scripts/report.tcl
+
+.PHONY: mcs
+mcs:
+	$(VIVADO) $(VIVADOFLAGS) -source scripts/synth.tcl -source scripts/impl.tcl -source scripts/bit.tcl -source scripts/mcs.tcl -source scripts/report.tcl
+
+.PHONY: clean
+clean::
+	rm -rf .Xil .ip_user_files *.log *.jou out usage_statistics_webtalk.xml usage_statistics_webtalk.html

fpga/xilinx/cmod_a7/README.md

@@ -0,0 +1,16 @@
+本目录包含FPGA约束文件，vivado tcl脚本和顶层文件。
+
+```
+constrs：包含FPGA约束文件
+scripts：包含vivado tcl脚本
+tinyriscv_soc_top.sv：整个SOC的顶层文件
+```
+
+根据vivado的安装路径，修改Makefile文件。
+
+生成bit文件：
+
+`make bit`
+
+即可在out目录下生成bit文件。
+

fpga/xilinx/cmod_a7/constrs/tinyriscv.xdc

@@ -0,0 +1,85 @@
+## 12 MHz Clock Signal
+set_property -dict { PACKAGE_PIN L17   IOSTANDARD LVCMOS33 } [get_ports { clk_12m_i }]; #IO_L12P_T1_MRCC_14 Sch=gclk
+create_clock -add -name sys_clk_pin -period 83.33 -waveform {0 41.66} [get_ports {clk_12m_i}]
+
+## 复位引脚
+set_property -dict { PACKAGE_PIN B18   IOSTANDARD LVCMOS33 } [get_ports rst_ext_i]; #IO_L19P_T3_16 Sch=btn[1]
+
+## CPU停住指示引脚
+set_property -dict { PACKAGE_PIN A17   IOSTANDARD LVCMOS33 } [get_ports halted_ind_pin]; #IO_L12N_T1_MRCC_16 Sch=led[1]
+
+## 串口引脚
+# UART0 TX
+set_property -dict { PACKAGE_PIN J18   IOSTANDARD LVCMOS33 } [get_ports {io_pins[0]}]; #IO_L7N_T1_D10_14 Sch=uart_rxd_out
+# UART0 RX
+set_property -dict { PACKAGE_PIN J17   IOSTANDARD LVCMOS33 } [get_ports {io_pins[3]}]; #IO_L7P_T1_D09_14 Sch=uart_txd_in
+
+## I2C引脚(EEPROM)
+# I2C0 SCL引脚
+set_property -dict { PACKAGE_PIN L1   IOSTANDARD LVCMOS33 } [get_ports {io_pins[6]}]; #IO_L6N_T0_VREF_35 Sch=pio[13]
+# I2C0 SDA引脚
+set_property -dict { PACKAGE_PIN L2   IOSTANDARD LVCMOS33 } [get_ports {io_pins[8]}]; #IO_L5N_T0_AD13N_35 Sch=pio[14]
+
+## DS18B20
+set_property -dict { PACKAGE_PIN C15   IOSTANDARD LVCMOS33 } [get_ports {io_pins[5]}]; #IO_L11P_T1_SRCC_16 Sch=pio[05]
+
+## WS2812
+set_property -dict { PACKAGE_PIN P1    IOSTANDARD LVCMOS33 } [get_ports {io_pins[4]}]; #IO_L19N_T3_VREF_35 Sch=pio[23]
+
+## USER KEY
+# KEY1
+set_property -dict { PACKAGE_PIN U4    IOSTANDARD LVCMOS33 } [get_ports {io_pins[1]}]; #IO_L11P_T1_SRCC_34 Sch=pio[38]
+# KEY2
+set_property -dict { PACKAGE_PIN V5    IOSTANDARD LVCMOS33 } [get_ports {io_pins[2]}]; #IO_L16N_T2_34 Sch=pio[39]
+
+## ANI
+# PWM_V
+set_property -dict { PACKAGE_PIN M3    IOSTANDARD LVCMOS33 } [get_ports {io_pins[7]}]; #IO_L8N_T1_AD14N_35 Sch=pio[01]
+# C_OUT
+set_property -dict { PACKAGE_PIN L3    IOSTANDARD LVCMOS33 } [get_ports {io_pins[9]}]; #IO_L8P_T1_AD14P_35 Sch=pio[02]
+
+## SPI/LED
+# SS
+set_property -dict { PACKAGE_PIN M1    IOSTANDARD LVCMOS33 } [get_ports {io_pins[11]}]; #IO_L9N_T1_DQS_AD7N_35 Sch=pio[17]
+# DQ1
+set_property -dict { PACKAGE_PIN N3    IOSTANDARD LVCMOS33 } [get_ports {io_pins[13]}]; #IO_L12P_T1_MRCC_35 Sch=pio[18]
+# DQ2/LED7
+set_property -dict { PACKAGE_PIN P3    IOSTANDARD LVCMOS33 } [get_ports {io_pins[14]}]; #IO_L12N_T1_MRCC_35 Sch=pio[19]
+# DQ3/LED6
+set_property -dict { PACKAGE_PIN M2    IOSTANDARD LVCMOS33 } [get_ports {io_pins[15]}]; #IO_L9P_T1_DQS_AD7P_35 Sch=pio[20]
+# SCK/LED5
+set_property -dict { PACKAGE_PIN N1    IOSTANDARD LVCMOS33 } [get_ports {io_pins[10]}]; #IO_L10N_T1_AD15N_35 Sch=pio[21]
+# DQ0/LED4
+set_property -dict { PACKAGE_PIN N2    IOSTANDARD LVCMOS33 } [get_ports {io_pins[12]}]; #IO_L10P_T1_AD15P_35 Sch=pio[22]
+
+## QSPI Flash引脚(存放程序)
+# CLK
+set_property -dict { PACKAGE_PIN J1  IOSTANDARD LVCMOS33 } [get_ports flash_spi_clk_pin]; #IO_L3N_T0_DQS_AD5N_35 Sch=pio[11]
+# SS
+set_property -dict { PACKAGE_PIN A15  IOSTANDARD LVCMOS33 } [get_ports flash_spi_ss_pin]; #IO_L6N_T0_VREF_16 Sch=pio[07]
+# DQ0
+set_property -dict { PACKAGE_PIN K2  IOSTANDARD LVCMOS33 } [get_ports {flash_spi_dq_pin[0]}]; #IO_L5P_T0_AD13P_35 Sch=pio[12]
+# DQ1
+set_property -dict { PACKAGE_PIN B15  IOSTANDARD LVCMOS33 } [get_ports {flash_spi_dq_pin[1]}]; #IO_L11N_T1_SRCC_16 Sch=pio[08]
+# DQ2
+set_property -dict { PACKAGE_PIN A14  IOSTANDARD LVCMOS33 } [get_ports {flash_spi_dq_pin[2]}]; #IO_L6P_T0_16 Sch=pio[09]
+# DQ3
+set_property -dict { PACKAGE_PIN J3  IOSTANDARD LVCMOS33 } [get_ports {flash_spi_dq_pin[3]}]; #IO_L7P_T1_AD6P_35 Sch=pio[10]
+
+## JTAG引脚
+# JTAG TCK引脚
+#set_property CLOCK_DEDICATED_ROUTE FALSE [get_nets jtag_TCK_pin]
+set_property -dict { PACKAGE_PIN W7   IOSTANDARD LVCMOS33 } [get_ports jtag_TCK_pin]; #IO_L13P_T2_MRCC_34 Sch=pio[46]
+# JTAG TMS引脚
+set_property -dict { PACKAGE_PIN U8   IOSTANDARD LVCMOS33 } [get_ports jtag_TMS_pin]; #IO_L14P_T2_SRCC_34 Sch=pio[47]
+# JTAG TDI引脚
+set_property -dict { PACKAGE_PIN V8   IOSTANDARD LVCMOS33 } [get_ports jtag_TDI_pin]; #IO_L14N_T2_SRCC_34 Sch=pio[48]
+# JTAG TDO引脚
+set_property -dict { PACKAGE_PIN U7   IOSTANDARD LVCMOS33 } [get_ports jtag_TDO_pin]; #IO_L19P_T3_34 Sch=pio[45]
+
+## Set unused pin pullnone
+set_property BITSTREAM.CONFIG.UNUSEDPIN Pullnone [current_design]
+
+set_property BITSTREAM.CONFIG.SPI_BUSWIDTH 4 [current_design]  
+set_property CONFIG_MODE SPIx4 [current_design] 
+set_property BITSTREAM.CONFIG.CONFIGRATE 6 [current_design]

fpga/xilinx/cmod_a7/scripts/bin.tcl

@@ -0,0 +1 @@
+write_cfgmem  -format bin -size 4 -interface SPIx4 -loadbit {up 0x00000000 "out/tinyriscv_soc_top.bit" } -force -file "out/tinyriscv_soc_top.bin"

fpga/xilinx/cmod_a7/scripts/bit.tcl

@@ -0,0 +1 @@
+write_bitstream -force [file join $outdir "${top_module}.bit"]

fpga/xilinx/cmod_a7/scripts/impl.tcl

@@ -0,0 +1,5 @@
+opt_design
+place_design
+phys_opt_design
+power_opt_design
+route_design

fpga/xilinx/cmod_a7/scripts/init.tcl

@@ -0,0 +1,43 @@
+set prj_name {tinyriscv}
+set part_fpga {xc7a15tcpg236-1}
+set top_module {tinyriscv_soc_top}
+
+set scriptsdir ./scripts
+set constrsdir ./constrs
+set outdir ./out
+set srcdir ../../../rtl
+
+# 在某目录下递归查找所有指定文件
+proc rec_glob { basedir pattern } {
+    set dirlist [glob -nocomplain -directory $basedir -type d *]
+    set findlist [glob -nocomplain -directory $basedir $pattern]
+    foreach dir $dirlist {
+        set reclist [rec_glob $dir $pattern]
+        set findlist [concat $findlist $reclist]
+    }
+    return $findlist
+}
+
+# 创建工程(内存模式)
+create_project -part $part_fpga -in_memory
+
+# 创建sources_1
+if {[get_filesets -quiet sources_1] eq ""} {
+    create_fileset -srcset sources_1
+}
+set src_pkg_files [rec_glob $srcdir "*pkg.sv"]
+set src_verilog_files [rec_glob $srcdir "*.sv"]
+set src_all_files [concat $src_pkg_files $src_verilog_files]
+# 添加verilog文件
+add_files -norecurse -fileset sources_1 $src_all_files
+add_files -norecurse -fileset sources_1 ./tinyriscv_soc_top.sv
+
+# 创建constrs_1
+if {[get_filesets -quiet constrs_1] eq ""} {
+    create_fileset -constrset constrs_1
+}
+# 添加约束文件
+add_files -norecurse -fileset constrs_1 [glob -directory $constrsdir {*.xdc}]
+
+# 创建输出目录
+file mkdir $outdir

fpga/xilinx/cmod_a7/scripts/mcs.tcl

@@ -0,0 +1 @@
+write_cfgmem  -format mcs -size 4 -interface SPIx4 -loadbit {up 0x00000000 "out/tinyriscv_soc_top.bit" } -force -file "out/tinyriscv_soc_top.mcs"

fpga/xilinx/cmod_a7/scripts/report.tcl

@@ -0,0 +1,12 @@
+set rptdir [file join $outdir report]
+file mkdir $rptdir
+set rptutil [file join $rptdir utilization.txt]
+report_datasheet -file [file join $rptdir datasheet.txt]
+report_utilization -hierarchical -file $rptutil
+report_clock_utilization -file $rptutil -append
+report_ram_utilization -file $rptutil -append -detail
+report_timing_summary -file [file join $rptdir timing.txt] -max_paths 10
+report_high_fanout_nets -file [file join $rptdir fanout.txt] -timing -load_types -max_nets 25
+report_drc -file [file join $rptdir drc.txt]
+report_io -file [file join $rptdir io.txt]
+report_clocks -file [file join $rptdir clocks.txt]

fpga/xilinx/cmod_a7/scripts/synth.tcl

@@ -0,0 +1 @@
+synth_design -top $top_module

fpga/xilinx/cmod_a7/tinyriscv_soc_top.sv

@@ -0,0 +1,668 @@
+ /*                                                                      
+ Copyright 2022 Blue Liang, liangkangnan@163.com
+                                                                         
+ Licensed under the Apache License, Version 2.0 (the "License");         
+ you may not use this file except in compliance with the License.        
+ You may obtain a copy of the License at                                 
+                                                                         
+     http://www.apache.org/licenses/LICENSE-2.0                          
+                                                                         
+ Unless required by applicable law or agreed to in writing, software    
+ distributed under the License is distributed on an "AS IS" BASIS,       
+ WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ See the License for the specific language governing permissions and     
+ limitations under the License.                                          
+ */
+
+`include "../../../rtl/core/defines.sv"
+`include "../../../rtl/debug/jtag_def.sv"
+
+// tinyriscv soc顶层模块
+module tinyriscv_soc_top #(
+    parameter bit          TRACE_ENABLE         = 1'b0,
+    parameter int          GPIO_NUM             = 16,
+    parameter int          I2C_NUM              = 2,
+    parameter int          UART_NUM             = 3,
+    parameter int          SPI_NUM              = 1
+    )(
+    input  wire               clk_12m_i,               // 时钟引脚
+    input  wire               rst_ext_i,               // 复位引脚，高电平有效
+
+    output wire               halted_ind_pin,          // jtag是否已经halt住CPU，高电平有效
+
+    inout  wire[GPIO_NUM-1:0] io_pins,                 // IO引脚，1bit代表一个IO
+
+    output wire               flash_spi_clk_pin,       // flash spi clk引脚
+    output wire               flash_spi_ss_pin,        // flash spi ss引脚
+    inout  wire [3:0]         flash_spi_dq_pin,        // flash spi dq引脚
+
+    input  wire               jtag_TCK_pin,            // JTAG TCK引脚
+    input  wire               jtag_TMS_pin,            // JTAG TMS引脚
+    input  wire               jtag_TDI_pin,            // JTAG TDI引脚
+    output wire               jtag_TDO_pin             // JTAG TDO引脚
+    );
+
+    localparam int MASTERS      = 3;  // Number of master ports
+    localparam int SLAVES       = 17; // Number of slave ports
+
+    // masters
+    localparam int JtagHost     = 0;
+    localparam int CoreD        = 1;
+    localparam int CoreI        = 2;
+
+    // slaves
+    localparam int Rom          = 0;
+    localparam int Ram          = 1;
+    localparam int JtagDevice   = 2;
+    localparam int Timer0       = 3;
+    localparam int Gpio         = 4;
+    localparam int Uart0        = 5;
+    localparam int Rvic         = 6;
+    localparam int I2c0         = 7;
+    localparam int Spi0         = 8;
+    localparam int Pinmux       = 9;
+    localparam int Uart1        = 10;
+    localparam int Uart2        = 11;
+    localparam int I2c1         = 12;
+    localparam int Timer1       = 13;
+    localparam int Timer2       = 14;
+    localparam int Xip          = 15;
+    localparam int Bootrom      = 16;
+
+    wire           master_req       [MASTERS];
+    wire           master_gnt       [MASTERS];
+    wire           master_rvalid    [MASTERS];
+    wire [31:0]    master_addr      [MASTERS];
+    wire           master_we        [MASTERS];
+    wire [ 3:0]    master_be        [MASTERS];
+    wire [31:0]    master_rdata     [MASTERS];
+    wire [31:0]    master_wdata     [MASTERS];
+
+    wire           slave_req        [SLAVES];
+    wire           slave_gnt        [SLAVES];
+    wire           slave_rvalid     [SLAVES];
+    wire [31:0]    slave_addr       [SLAVES];
+    wire           slave_we         [SLAVES];
+    wire [ 3:0]    slave_be         [SLAVES];
+    wire [31:0]    slave_rdata      [SLAVES];
+    wire [31:0]    slave_wdata      [SLAVES];
+
+    wire [31:0]    slave_addr_mask  [SLAVES];
+    wire [31:0]    slave_addr_base  [SLAVES];
+
+    wire clk;
+    wire rst_ext_n;
+    wire ndmreset;
+    wire ndmreset_n;
+    wire debug_req;
+    wire core_halted;
+
+    reg[31:0] irq_src;
+    wire int_req;
+    wire[7:0] int_id;
+
+    wire timer0_irq;
+    wire timer1_irq;
+    wire timer2_irq;
+    wire uart0_irq;
+    wire uart1_irq;
+    wire uart2_irq;
+    wire gpio0_irq;
+    wire gpio1_irq;
+    wire i2c0_irq;
+    wire i2c1_irq;
+    wire spi0_irq;
+    wire gpio2_4_irq;
+    wire gpio5_7_irq;
+    wire gpio8_irq;
+    wire gpio9_irq;
+    wire gpio10_12_irq;
+    wire gpio13_15_irq;
+
+    wire[GPIO_NUM-1:0] gpio_data_in;
+    wire[GPIO_NUM-1:0] gpio_oe;
+    wire[GPIO_NUM-1:0] gpio_data_out;
+
+    wire[GPIO_NUM-1:0] io_data_in;
+    wire[GPIO_NUM-1:0] io_oe;
+    wire[GPIO_NUM-1:0] io_data_out;
+
+    wire[I2C_NUM-1:0] i2c_scl_in;
+    wire[I2C_NUM-1:0] i2c_scl_oe;
+    wire[I2C_NUM-1:0] i2c_scl_out;
+    wire[I2C_NUM-1:0] i2c_sda_in;
+    wire[I2C_NUM-1:0] i2c_sda_oe;
+    wire[I2C_NUM-1:0] i2c_sda_out;
+
+    wire[UART_NUM-1:0] uart_tx;
+    wire[UART_NUM-1:0] uart_rx;
+
+    wire[SPI_NUM-1:0] spi_clk_in;
+    wire[SPI_NUM-1:0] spi_clk_oe;
+    wire[SPI_NUM-1:0] spi_clk_out;
+    wire[SPI_NUM-1:0] spi_ss_in;
+    wire[SPI_NUM-1:0] spi_ss_oe;
+    wire[SPI_NUM-1:0] spi_ss_out;
+    wire[3:0]         spi_dq_in[SPI_NUM-1:0];
+    wire[3:0]         spi_dq_oe[SPI_NUM-1:0];
+    wire[3:0]         spi_dq_out[SPI_NUM-1:0];
+
+    wire[31:0]        core_instr_addr;
+    wire[31:0]        core_data_addr;
+
+    wire[3:0]         flash_spi_dq_in;
+    wire[3:0]         flash_spi_dq_oe;
+    wire[3:0]         flash_spi_dq_out;
+
+    // 中断源
+    always @ (*) begin
+        irq_src     = 32'h0;
+        irq_src[ 0] = timer0_irq;
+        irq_src[ 1] = uart0_irq;
+        irq_src[ 2] = gpio0_irq;
+        irq_src[ 3] = gpio1_irq;
+        irq_src[ 4] = i2c0_irq;
+        irq_src[ 5] = spi0_irq;
+        irq_src[ 6] = gpio2_4_irq;
+        irq_src[ 7] = gpio5_7_irq;
+        irq_src[ 8] = gpio8_irq;
+        irq_src[ 9] = gpio9_irq;
+        irq_src[10] = gpio10_12_irq;
+        irq_src[11] = gpio13_15_irq;
+        irq_src[12] = uart1_irq;
+        irq_src[13] = uart2_irq;
+        irq_src[14] = i2c1_irq;
+        irq_src[15] = timer1_irq;
+        irq_src[16] = timer2_irq;
+    end
+
+    assign rst_ext_n = ~rst_ext_i;
+    assign halted_ind_pin = core_halted;
+
+    assign master_we[CoreI] = '0;
+    assign master_be[CoreI] = '0;
+    tinyriscv_core #(
+        .DEBUG_HALT_ADDR(`DEBUG_ADDR_BASE + `HaltAddress),
+        .DEBUG_EXCEPTION_ADDR(`DEBUG_ADDR_BASE + `ExceptionAddress),
+        .BranchPredictor(1'b1),
+        .TRACE_ENABLE(TRACE_ENABLE)
+    ) u_tinyriscv_core (
+        .clk            (clk),
+        .rst_n          (ndmreset_n),
+
+        .instr_req_o    (master_req[CoreI]),
+        .instr_gnt_i    (master_gnt[CoreI]),
+        .instr_rvalid_i (master_rvalid[CoreI]),
+        .instr_addr_o   (master_addr[CoreI]),
+        .instr_rdata_i  (master_rdata[CoreI]),
+        .instr_err_i    (1'b0),
+
+        .data_req_o     (master_req[CoreD]),
+        .data_gnt_i     (master_gnt[CoreD]),
+        .data_rvalid_i  (master_rvalid[CoreD]),
+        .data_we_o      (master_we[CoreD]),
+        .data_be_o      (master_be[CoreD]),
+        .data_addr_o    (master_addr[CoreD]),
+        .data_wdata_o   (master_wdata[CoreD]),
+        .data_rdata_i   (master_rdata[CoreD]),
+        .data_err_i     (1'b0),
+
+        .int_req_i      (int_req),
+        .int_id_i       (int_id),
+
+        .debug_req_i    (debug_req)
+    );
+
+    assign slave_addr_mask[Rom] = `ROM_ADDR_MASK;
+    assign slave_addr_base[Rom] = `ROM_ADDR_BASE;
+    // 1.指令存储器
+    rom #(
+        .DP(`ROM_DEPTH)
+    ) u_rom (
+        .clk_i      (clk),
+        .rst_ni     (ndmreset_n),
+        .req_i      (slave_req[Rom]),
+        .addr_i     (slave_addr[Rom]),
+        .data_i     (slave_wdata[Rom]),
+        .be_i       (slave_be[Rom]),
+        .we_i       (slave_we[Rom]),
+        .gnt_o      (slave_gnt[Rom]),
+        .rvalid_o   (slave_rvalid[Rom]),
+        .data_o     (slave_rdata[Rom])
+    );
+
+    assign slave_addr_mask[Ram] = `RAM_ADDR_MASK;
+    assign slave_addr_base[Ram] = `RAM_ADDR_BASE;
+    // 2.数据存储器
+    ram #(
+        .DP(`RAM_DEPTH)
+    ) u_ram (
+        .clk_i      (clk),
+        .rst_ni     (ndmreset_n),
+        .req_i      (slave_req[Ram]),
+        .addr_i     (slave_addr[Ram]),
+        .data_i     (slave_wdata[Ram]),
+        .be_i       (slave_be[Ram]),
+        .we_i       (slave_we[Ram]),
+        .gnt_o      (slave_gnt[Ram]),
+        .rvalid_o   (slave_rvalid[Ram]),
+        .data_o     (slave_rdata[Ram])
+    );
+
+    assign slave_addr_mask[Timer0] = `TIMER0_ADDR_MASK;
+    assign slave_addr_base[Timer0] = `TIMER0_ADDR_BASE;
+    // 3.定时器0模块
+    timer_top timer0(
+        .clk_i   (clk),
+        .rst_ni  (ndmreset_n),
+        .irq_o   (timer0_irq),
+        .req_i   (slave_req[Timer0]),
+        .we_i    (slave_we[Timer0]),
+        .be_i    (slave_be[Timer0]),
+        .addr_i  (slave_addr[Timer0]),
+        .data_i  (slave_wdata[Timer0]),
+        .gnt_o   (slave_gnt[Timer0]),
+        .rvalid_o(slave_rvalid[Timer0]),
+        .data_o  (slave_rdata[Timer0])
+    );
+
+    assign slave_addr_mask[Timer1] = `TIMER1_ADDR_MASK;
+    assign slave_addr_base[Timer1] = `TIMER1_ADDR_BASE;
+    // 4.定时器1模块
+    timer_top timer1(
+        .clk_i   (clk),
+        .rst_ni  (ndmreset_n),
+        .irq_o   (timer1_irq),
+        .req_i   (slave_req[Timer1]),
+        .we_i    (slave_we[Timer1]),
+        .be_i    (slave_be[Timer1]),
+        .addr_i  (slave_addr[Timer1]),
+        .data_i  (slave_wdata[Timer1]),
+        .gnt_o   (slave_gnt[Timer1]),
+        .rvalid_o(slave_rvalid[Timer1]),
+        .data_o  (slave_rdata[Timer1])
+    );
+
+    assign slave_addr_mask[Timer2] = `TIMER2_ADDR_MASK;
+    assign slave_addr_base[Timer2] = `TIMER2_ADDR_BASE;
+    // 5.定时器2模块
+    timer_top timer2(
+        .clk_i   (clk),
+        .rst_ni  (ndmreset_n),
+        .irq_o   (timer2_irq),
+        .req_i   (slave_req[Timer2]),
+        .we_i    (slave_we[Timer2]),
+        .be_i    (slave_be[Timer2]),
+        .addr_i  (slave_addr[Timer2]),
+        .data_i  (slave_wdata[Timer2]),
+        .gnt_o   (slave_gnt[Timer2]),
+        .rvalid_o(slave_rvalid[Timer2]),
+        .data_o  (slave_rdata[Timer2])
+    );
+
+    assign slave_addr_mask[Gpio] = `GPIO_ADDR_MASK;
+    assign slave_addr_base[Gpio] = `GPIO_ADDR_BASE;
+    // 6.GPIO模块
+    gpio_top #(
+        .GPIO_NUM(GPIO_NUM)
+    ) u_gpio (
+        .clk_i          (clk),
+        .rst_ni         (ndmreset_n),
+        .gpio_oe_o      (gpio_oe),
+        .gpio_data_o    (gpio_data_out),
+        .gpio_data_i    (gpio_data_in),
+        .irq_gpio0_o    (gpio0_irq),
+        .irq_gpio1_o    (gpio1_irq),
+        .irq_gpio2_4_o  (gpio2_4_irq),
+        .irq_gpio5_7_o  (gpio5_7_irq),
+        .irq_gpio8_o    (gpio8_irq),
+        .irq_gpio9_o    (gpio9_irq),
+        .irq_gpio10_12_o(gpio10_12_irq),
+        .irq_gpio13_15_o(gpio13_15_irq),
+        .req_i          (slave_req[Gpio]),
+        .we_i           (slave_we[Gpio]),
+        .be_i           (slave_be[Gpio]),
+        .addr_i         (slave_addr[Gpio]),
+        .data_i         (slave_wdata[Gpio]),
+        .gnt_o          (slave_gnt[Gpio]),
+        .rvalid_o       (slave_rvalid[Gpio]),
+        .data_o         (slave_rdata[Gpio])
+    );
+
+    assign slave_addr_mask[Uart0] = `UART0_ADDR_MASK;
+    assign slave_addr_base[Uart0] = `UART0_ADDR_BASE;
+    // 7.串口0模块
+    uart_top uart0 (
+        .clk_i      (clk),
+        .rst_ni     (ndmreset_n),
+        .rx_i       (uart_rx[0]),
+        .tx_o       (uart_tx[0]),
+        .irq_o      (uart0_irq),
+        .req_i      (slave_req[Uart0]),
+        .we_i       (slave_we[Uart0]),
+        .be_i       (slave_be[Uart0]),
+        .addr_i     (slave_addr[Uart0]),
+        .data_i     (slave_wdata[Uart0]),
+        .gnt_o      (slave_gnt[Uart0]),
+        .rvalid_o   (slave_rvalid[Uart0]),
+        .data_o     (slave_rdata[Uart0])
+    );
+
+    assign slave_addr_mask[Uart1] = `UART1_ADDR_MASK;
+    assign slave_addr_base[Uart1] = `UART1_ADDR_BASE;
+    // 8.串口1模块
+    uart_top uart1 (
+        .clk_i      (clk),
+        .rst_ni     (ndmreset_n),
+        .rx_i       (uart_rx[1]),
+        .tx_o       (uart_tx[1]),
+        .irq_o      (uart1_irq),
+        .req_i      (slave_req[Uart1]),
+        .we_i       (slave_we[Uart1]),
+        .be_i       (slave_be[Uart1]),
+        .addr_i     (slave_addr[Uart1]),
+        .data_i     (slave_wdata[Uart1]),
+        .gnt_o      (slave_gnt[Uart1]),
+        .rvalid_o   (slave_rvalid[Uart1]),
+        .data_o     (slave_rdata[Uart1])
+    );
+
+    assign slave_addr_mask[Uart2] = `UART2_ADDR_MASK;
+    assign slave_addr_base[Uart2] = `UART2_ADDR_BASE;
+    // 9.串口2模块
+    uart_top uart2 (
+        .clk_i      (clk),
+        .rst_ni     (ndmreset_n),
+        .rx_i       (uart_rx[2]),
+        .tx_o       (uart_tx[2]),
+        .irq_o      (uart2_irq),
+        .req_i      (slave_req[Uart2]),
+        .we_i       (slave_we[Uart2]),
+        .be_i       (slave_be[Uart2]),
+        .addr_i     (slave_addr[Uart2]),
+        .data_i     (slave_wdata[Uart2]),
+        .gnt_o      (slave_gnt[Uart2]),
+        .rvalid_o   (slave_rvalid[Uart2]),
+        .data_o     (slave_rdata[Uart2])
+    );
+
+    assign slave_addr_mask[Rvic] = `RVIC_ADDR_MASK;
+    assign slave_addr_base[Rvic] = `RVIC_ADDR_BASE;
+    // 10.中断控制器模块
+    rvic_top u_rvic(
+        .clk_i      (clk),
+        .rst_ni     (ndmreset_n),
+        .src_i      (irq_src),
+        .irq_o      (int_req),
+        .irq_id_o   (int_id),
+        .req_i      (slave_req[Rvic]),
+        .we_i       (slave_we[Rvic]),
+        .be_i       (slave_be[Rvic]),
+        .addr_i     (slave_addr[Rvic]),
+        .data_i     (slave_wdata[Rvic]),
+        .gnt_o      (slave_gnt[Rvic]),
+        .rvalid_o   (slave_rvalid[Rvic]),
+        .data_o     (slave_rdata[Rvic])
+    );
+
+    assign slave_addr_mask[I2c0] = `I2C0_ADDR_MASK;
+    assign slave_addr_base[I2c0] = `I2C0_ADDR_BASE;
+    // 11.I2C0模块
+    i2c_top i2c0(
+        .clk_i      (clk),
+        .rst_ni     (ndmreset_n),
+        .scl_o      (i2c_scl_out[0]),
+        .scl_oe_o   (i2c_scl_oe[0]),
+        .scl_i      (i2c_scl_in[0]),
+        .sda_o      (i2c_sda_out[0]),
+        .sda_oe_o   (i2c_sda_oe[0]),
+        .sda_i      (i2c_sda_in[0]),
+        .irq_o      (i2c0_irq),
+        .req_i      (slave_req[I2c0]),
+        .we_i       (slave_we[I2c0]),
+        .be_i       (slave_be[I2c0]),
+        .addr_i     (slave_addr[I2c0]),
+        .data_i     (slave_wdata[I2c0]),
+        .gnt_o      (slave_gnt[I2c0]),
+        .rvalid_o   (slave_rvalid[I2c0]),
+        .data_o     (slave_rdata[I2c0])
+    );
+
+    assign slave_addr_mask[I2c1] = `I2C1_ADDR_MASK;
+    assign slave_addr_base[I2c1] = `I2C1_ADDR_BASE;
+    // 12.I2C1模块
+    i2c_top i2c1(
+        .clk_i      (clk),
+        .rst_ni     (ndmreset_n),
+        .scl_o      (i2c_scl_out[1]),
+        .scl_oe_o   (i2c_scl_oe[1]),
+        .scl_i      (i2c_scl_in[1]),
+        .sda_o      (i2c_sda_out[1]),
+        .sda_oe_o   (i2c_sda_oe[1]),
+        .sda_i      (i2c_sda_in[1]),
+        .irq_o      (i2c1_irq),
+        .req_i      (slave_req[I2c1]),
+        .we_i       (slave_we[I2c1]),
+        .be_i       (slave_be[I2c1]),
+        .addr_i     (slave_addr[I2c1]),
+        .data_i     (slave_wdata[I2c1]),
+        .gnt_o      (slave_gnt[I2c1]),
+        .rvalid_o   (slave_rvalid[I2c1]),
+        .data_o     (slave_rdata[I2c1])
+    );
+
+    assign slave_addr_mask[Spi0] = `SPI0_ADDR_MASK;
+    assign slave_addr_base[Spi0] = `SPI0_ADDR_BASE;
+    // 13.SPI0模块
+    spi_top spi0(
+        .clk_i      (clk),
+        .rst_ni     (ndmreset_n),
+        .spi_clk_i  (spi_clk_in[0]),
+        .spi_clk_o  (spi_clk_out[0]),
+        .spi_clk_oe_o(spi_clk_oe[0]),
+        .spi_ss_i   (spi_ss_in[0]),
+        .spi_ss_o   (spi_ss_out[0]),
+        .spi_ss_oe_o(spi_ss_oe[0]),
+        .spi_dq0_i  (spi_dq_in[0][0]),
+        .spi_dq0_o  (spi_dq_out[0][0]),
+        .spi_dq0_oe_o(spi_dq_oe[0][0]),
+        .spi_dq1_i  (spi_dq_in[0][1]),
+        .spi_dq1_o  (spi_dq_out[0][1]),
+        .spi_dq1_oe_o(spi_dq_oe[0][1]),
+        .spi_dq2_i  (spi_dq_in[0][2]),
+        .spi_dq2_o  (spi_dq_out[0][2]),
+        .spi_dq2_oe_o(spi_dq_oe[0][2]),
+        .spi_dq3_i  (spi_dq_in[0][3]),
+        .spi_dq3_o  (spi_dq_out[0][3]),
+        .spi_dq3_oe_o(spi_dq_oe[0][3]),
+        .irq_o      (spi0_irq),
+        .req_i      (slave_req[Spi0]),
+        .we_i       (slave_we[Spi0]),
+        .be_i       (slave_be[Spi0]),
+        .addr_i     (slave_addr[Spi0]),
+        .data_i     (slave_wdata[Spi0]),
+        .gnt_o      (slave_gnt[Spi0]),
+        .rvalid_o   (slave_rvalid[Spi0]),
+        .data_o     (slave_rdata[Spi0])
+    );
+
+    for (genvar i = 0; i < GPIO_NUM; i = i + 1) begin : g_io_data
+        assign io_pins[i] = io_oe[i] ? io_data_out[i] : 1'bz;
+        assign io_data_in[i] = io_pins[i];
+    end
+
+    assign slave_addr_mask[Pinmux] = `PINMUX_ADDR_MASK;
+    assign slave_addr_base[Pinmux] = `PINMUX_ADDR_BASE;
+    // 14.PINMUX模块
+    pinmux_top #(
+        .GPIO_NUM(GPIO_NUM),
+        .I2C_NUM(I2C_NUM),
+        .UART_NUM(UART_NUM),
+        .SPI_NUM(SPI_NUM)
+    ) u_pinmux (
+        .clk_i          (clk),
+        .rst_ni         (ndmreset_n),
+        .gpio_oe_i      (gpio_oe),
+        .gpio_val_i     (gpio_data_out),
+        .gpio_val_o     (gpio_data_in),
+        .i2c_sda_oe_i   (i2c_sda_oe),
+        .i2c_sda_val_i  (i2c_sda_out),
+        .i2c_sda_val_o  (i2c_sda_in),
+        .i2c_scl_oe_i   (i2c_scl_oe),
+        .i2c_scl_val_i  (i2c_scl_out),
+        .i2c_scl_val_o  (i2c_scl_in),
+        .uart_tx_oe_i   ({UART_NUM{1'b1}}),
+        .uart_tx_val_i  (uart_tx),
+        .uart_tx_val_o  (),
+        .uart_rx_oe_i   ({UART_NUM{1'b0}}),
+        .uart_rx_val_i  (),
+        .uart_rx_val_o  (uart_rx),
+        .spi_clk_oe_i   (spi_clk_oe),
+        .spi_clk_val_i  (spi_clk_out),
+        .spi_clk_val_o  (spi_clk_in),
+        .spi_ss_oe_i    (spi_ss_oe),
+        .spi_ss_val_i   (spi_ss_out),
+        .spi_ss_val_o   (spi_ss_in),
+        .spi_dq_oe_i    (spi_dq_oe),
+        .spi_dq_val_i   (spi_dq_out),
+        .spi_dq_val_o   (spi_dq_in),
+        .io_val_i       (io_data_in),
+        .io_val_o       (io_data_out),
+        .io_oe_o        (io_oe),
+        .req_i          (slave_req[Pinmux]),
+        .we_i           (slave_we[Pinmux]),
+        .be_i           (slave_be[Pinmux]),
+        .addr_i         (slave_addr[Pinmux]),
+        .data_i         (slave_wdata[Pinmux]),
+        .gnt_o          (slave_gnt[Pinmux]),
+        .rvalid_o       (slave_rvalid[Pinmux]),
+        .data_o         (slave_rdata[Pinmux])
+    );
+
+    for (genvar j = 0; j < 4; j = j + 1) begin : g_spi_pin_data
+        assign flash_spi_dq_pin[j] = flash_spi_dq_oe[j] ? flash_spi_dq_out[j] : 1'bz;
+        assign flash_spi_dq_in[j] = flash_spi_dq_pin[j];
+    end
+
+    assign slave_addr_mask[Xip] = `XIP_ADDR_MASK;
+    assign slave_addr_base[Xip] = `XIP_ADDR_BASE;
+    // 15.xip模块
+    xip_top xip (
+        .clk_i          (clk),
+        .rst_ni         (ndmreset_n),
+        .spi_clk_o      (flash_spi_clk_pin),
+        .spi_clk_oe_o   (),
+        .spi_ss_o       (flash_spi_ss_pin),
+        .spi_ss_oe_o    (),
+        .spi_dq0_i      (flash_spi_dq_in[0]),
+        .spi_dq0_o      (flash_spi_dq_out[0]),
+        .spi_dq0_oe_o   (flash_spi_dq_oe[0]),
+        .spi_dq1_i      (flash_spi_dq_in[1]),
+        .spi_dq1_o      (flash_spi_dq_out[1]),
+        .spi_dq1_oe_o   (flash_spi_dq_oe[1]),
+        .spi_dq2_i      (flash_spi_dq_in[2]),
+        .spi_dq2_o      (flash_spi_dq_out[2]),
+        .spi_dq2_oe_o   (flash_spi_dq_oe[2]),
+        .spi_dq3_i      (flash_spi_dq_in[3]),
+        .spi_dq3_o      (flash_spi_dq_out[3]),
+        .spi_dq3_oe_o   (flash_spi_dq_oe[3]),
+        .req_i          (slave_req[Xip]),
+        .we_i           (slave_we[Xip]),
+        .be_i           (slave_be[Xip]),
+        .addr_i         (slave_addr[Xip]),
+        .data_i         (slave_wdata[Xip]),
+        .gnt_o          (slave_gnt[Xip]),
+        .rvalid_o       (slave_rvalid[Xip]),
+        .data_o         (slave_rdata[Xip])
+    );
+
+    assign slave_addr_mask[Bootrom] = `BOOTROM_ADDR_MASK;
+    assign slave_addr_base[Bootrom] = `BOOTROM_ADDR_BASE;
+    // 16.bootrom模块
+    bootrom_top bootrom(
+        .clk_i   (clk),
+        .rst_ni  (ndmreset_n),
+        .req_i   (slave_req[Bootrom]),
+        .we_i    (slave_we[Bootrom]),
+        .be_i    (slave_be[Bootrom]),
+        .addr_i  (slave_addr[Bootrom]),
+        .data_i  (slave_wdata[Bootrom]),
+        .gnt_o   (slave_gnt[Bootrom]),
+        .rvalid_o(slave_rvalid[Bootrom]),
+        .data_o  (slave_rdata[Bootrom])
+    );
+
+    // 内部总线
+    obi_interconnect #(
+        .MASTERS(MASTERS),
+        .SLAVES(SLAVES)
+    ) bus (
+        .clk_i              (clk),
+        .rst_ni             (ndmreset_n),
+        .master_req_i       (master_req),
+        .master_gnt_o       (master_gnt),
+        .master_rvalid_o    (master_rvalid),
+        .master_we_i        (master_we),
+        .master_be_i        (master_be),
+        .master_addr_i      (master_addr),
+        .master_wdata_i     (master_wdata),
+        .master_rdata_o     (master_rdata),
+        .slave_addr_mask_i  (slave_addr_mask),
+        .slave_addr_base_i  (slave_addr_base),
+        .slave_req_o        (slave_req),
+        .slave_gnt_i        (slave_gnt),
+        .slave_rvalid_i     (slave_rvalid),
+        .slave_we_o         (slave_we),
+        .slave_be_o         (slave_be),
+        .slave_addr_o       (slave_addr),
+        .slave_wdata_o      (slave_wdata),
+        .slave_rdata_i      (slave_rdata)
+    );
+
+    assign clk = clk_12m_i;
+
+    // 复位信号产生
+    rst_gen #(
+        .RESET_FIFO_DEPTH(5)
+    ) u_rst (
+        .clk    (clk),
+        .rst_ni (rst_ext_n & (~ndmreset)),
+        .rst_no (ndmreset_n)
+    );
+
+    assign slave_addr_mask[JtagDevice] = `DEBUG_ADDR_MASK;
+    assign slave_addr_base[JtagDevice] = `DEBUG_ADDR_BASE;
+    // JTAG模块
+    jtag_top #(
+
+    ) u_jtag (
+        .clk_i              (clk),
+        .rst_ni             (rst_ext_n),
+        .debug_req_o        (debug_req),
+        .ndmreset_o         (ndmreset),
+        .halted_o           (core_halted),
+        .jtag_tck_i         (jtag_TCK_pin),
+        .jtag_tdi_i         (jtag_TDI_pin),
+        .jtag_tms_i         (jtag_TMS_pin),
+        .jtag_trst_ni       (rst_ext_n),
+        .jtag_tdo_o         (jtag_TDO_pin),
+        .master_req_o       (master_req[JtagHost]),
+        .master_gnt_i       (master_gnt[JtagHost]),
+        .master_rvalid_i    (master_rvalid[JtagHost]),
+        .master_we_o        (master_we[JtagHost]),
+        .master_be_o        (master_be[JtagHost]),
+        .master_addr_o      (master_addr[JtagHost]),
+        .master_wdata_o     (master_wdata[JtagHost]),
+        .master_rdata_i     (master_rdata[JtagHost]),
+        .master_err_i       (1'b0),
+        .slave_req_i        (slave_req[JtagDevice]),
+        .slave_we_i         (slave_we[JtagDevice]),
+        .slave_addr_i       (slave_addr[JtagDevice]),
+        .slave_be_i         (slave_be[JtagDevice]),
+        .slave_wdata_i      (slave_wdata[JtagDevice]),
+        .slave_gnt_o        (slave_gnt[JtagDevice]),
+        .slave_rvalid_o     (slave_rvalid[JtagDevice]),
+        .slave_rdata_o      (slave_rdata[JtagDevice])
+    );
+
+endmodule

fpga/xilinx/perf-v/.gitignore

@@ -0,0 +1,7 @@
+out/
+.Xil/
+*.log
+*.html
+*.xml
+
+

fpga/xilinx/perf-v/Makefile

@@ -0,0 +1,22 @@
+VIVADO_BASE := /home/ubuntu/Xilinx/Vivado/2018.1/bin
+VIVADO := $(VIVADO_BASE)/vivado
+
+VIVADOFLAGS := \
+	-nojournal -mode batch \
+	-source scripts/init.tcl
+
+.PHONY: synth
+synth:
+	$(VIVADO) $(VIVADOFLAGS) -source scripts/synth.tcl
+
+.PHONY: impl
+impl:
+	$(VIVADO) $(VIVADOFLAGS) -source scripts/synth.tcl -source scripts/impl.tcl
+
+.PHONY: bit
+bit:
+	$(VIVADO) $(VIVADOFLAGS) -source scripts/synth.tcl -source scripts/impl.tcl -source scripts/bit_stream.tcl -source scripts/report.tcl
+
+.PHONY: clean
+clean::
+	rm -rf .Xil .ip_user_files *.log *.jou out usage_statistics_webtalk.xml usage_statistics_webtalk.html

fpga/xilinx/perf-v/README.md

@@ -0,0 +1,16 @@
+本目录包含FPGA约束文件，vivado tcl脚本和顶层文件。
+
+```
+constrs：包含FPGA约束文件
+scripts：包含vivado tcl脚本
+tinyriscv_soc_top.sv：整个SOC的顶层文件
+```
+
+根据vivado的安装路径，修改Makefile文件。
+
+生成bit文件：
+
+`make bit`
+
+即可在out目录下生成bit文件。
+

fpga/xilinx/perf-v/constrs/tinyriscv.xdc

@@ -0,0 +1,121 @@
+
+# 时钟引脚
+set_property IOSTANDARD LVCMOS33 [get_ports clk_50m_i]
+set_property PACKAGE_PIN N14 [get_ports clk_50m_i]
+
+# 时钟约束50MHz
+create_clock -add -name SYS_CLK -period 20.00 [get_ports clk_50m_i]
+
+# 复位引脚
+set_property IOSTANDARD LVCMOS33 [get_ports rst_ext_ni]
+set_property PACKAGE_PIN L13 [get_ports rst_ext_ni]
+
+# CPU停住指示引脚
+set_property IOSTANDARD LVCMOS33 [get_ports halted_ind_pin]
+set_property PACKAGE_PIN P15 [get_ports halted_ind_pin]
+
+# 串口发送引脚
+set_property IOSTANDARD LVCMOS33 [get_ports {io_pins[0]}]
+set_property PACKAGE_PIN M6 [get_ports {io_pins[0]}]
+
+# 串口接收引脚
+set_property IOSTANDARD LVCMOS33 [get_ports {io_pins[3]}]
+set_property PACKAGE_PIN N6 [get_ports {io_pins[3]}]
+
+# I2C0 SCL引脚
+set_property IOSTANDARD LVCMOS33 [get_ports {io_pins[6]}]
+set_property PACKAGE_PIN R10 [get_ports {io_pins[6]}]
+
+# I2C0 SDA引脚
+set_property IOSTANDARD LVCMOS33 [get_ports {io_pins[8]}]
+set_property PACKAGE_PIN R11 [get_ports {io_pins[8]}]
+
+# SPI DQ3引脚
+set_property IOSTANDARD LVCMOS33 [get_ports {io_pins[15]}]
+set_property PACKAGE_PIN T14 [get_ports {io_pins[15]}]
+
+# SPI DQ2引脚
+set_property IOSTANDARD LVCMOS33 [get_ports {io_pins[14]}]
+set_property PACKAGE_PIN R16 [get_ports {io_pins[14]}]
+
+# SPI DQ1引脚
+set_property IOSTANDARD LVCMOS33 [get_ports {io_pins[13]}]
+set_property PACKAGE_PIN R15 [get_ports {io_pins[13]}]
+
+# SPI DQ0引脚
+set_property IOSTANDARD LVCMOS33 [get_ports {io_pins[12]}]
+set_property PACKAGE_PIN K13 [get_ports {io_pins[12]}]
+
+# SPI SS引脚
+set_property IOSTANDARD LVCMOS33 [get_ports {io_pins[11]}]
+set_property PACKAGE_PIN L14 [get_ports {io_pins[11]}]
+
+# SPI CLK引脚
+set_property IOSTANDARD LVCMOS33 [get_ports {io_pins[10]}]
+set_property PACKAGE_PIN M14 [get_ports {io_pins[10]}]
+
+# GPIO0引脚
+set_property IOSTANDARD LVCMOS33 [get_ports {io_pins[7]}]
+set_property PACKAGE_PIN P16 [get_ports {io_pins[7]}]
+
+# GPIO1引脚
+set_property IOSTANDARD LVCMOS33 [get_ports {io_pins[9]}]
+set_property PACKAGE_PIN T15 [get_ports {io_pins[9]}]
+
+
+set_property IOSTANDARD LVCMOS33 [get_ports {io_pins[2]}]
+set_property PACKAGE_PIN T13 [get_ports {io_pins[2]}]
+set_property IOSTANDARD LVCMOS33 [get_ports {io_pins[1]}]
+set_property PACKAGE_PIN R13 [get_ports {io_pins[1]}]
+set_property IOSTANDARD LVCMOS33 [get_ports {io_pins[4]}]
+set_property PACKAGE_PIN R7 [get_ports {io_pins[4]}]
+set_property IOSTANDARD LVCMOS33 [get_ports {io_pins[5]}]
+set_property PACKAGE_PIN R6 [get_ports {io_pins[5]}]
+
+
+# SPI Flash引脚
+# CLK
+set_property IOSTANDARD LVCMOS33 [get_ports flash_spi_clk_pin]
+set_property PACKAGE_PIN N4 [get_ports flash_spi_clk_pin]
+# SS
+set_property IOSTANDARD LVCMOS33 [get_ports flash_spi_ss_pin]
+set_property PACKAGE_PIN M5 [get_ports flash_spi_ss_pin]
+# DQ0
+set_property IOSTANDARD LVCMOS33 [get_ports {flash_spi_dq_pin[0]}]
+set_property PACKAGE_PIN N1 [get_ports {flash_spi_dq_pin[0]}]
+# DQ1
+set_property IOSTANDARD LVCMOS33 [get_ports {flash_spi_dq_pin[1]}]
+set_property PACKAGE_PIN P1 [get_ports {flash_spi_dq_pin[1]}]
+# DQ2
+set_property IOSTANDARD LVCMOS33 [get_ports {flash_spi_dq_pin[2]}]
+set_property PACKAGE_PIN P4 [get_ports {flash_spi_dq_pin[2]}]
+# DQ3
+set_property IOSTANDARD LVCMOS33 [get_ports {flash_spi_dq_pin[3]}]
+set_property PACKAGE_PIN P3 [get_ports {flash_spi_dq_pin[3]}]
+
+
+# JTAG TCK引脚
+set_property IOSTANDARD LVCMOS33 [get_ports jtag_TCK_pin]
+set_property PACKAGE_PIN N11 [get_ports jtag_TCK_pin]
+
+# 1MHZ
+#create_clock -name JTAG_CLK -period 1000 [get_ports jtag_TCK_pin]
+
+# JTAG TMS引脚
+set_property IOSTANDARD LVCMOS33 [get_ports jtag_TMS_pin]
+set_property PACKAGE_PIN N3 [get_ports jtag_TMS_pin]
+#set_input_delay -clock JTAG_CLK 500 [get_ports jtag_TMS_pin]
+
+# JTAG TDI引脚
+set_property IOSTANDARD LVCMOS33 [get_ports jtag_TDI_pin]
+set_property PACKAGE_PIN N2 [get_ports jtag_TDI_pin]
+#set_input_delay -clock JTAG_CLK 500 [get_ports jtag_TDI_pin]
+
+# JTAG TDO引脚
+set_property IOSTANDARD LVCMOS33 [get_ports jtag_TDO_pin]
+set_property PACKAGE_PIN M1 [get_ports jtag_TDO_pin]
+#set_output_delay -clock JTAG_CLK 500 [get_ports jtag_TDO_pin]
+
+set_property BITSTREAM.CONFIG.SPI_BUSWIDTH 4 [current_design]  
+set_property CONFIG_MODE SPIx4 [current_design] 
+set_property BITSTREAM.CONFIG.CONFIGRATE 50 [current_design]

fpga/xilinx/perf-v/scripts/bit_stream.tcl

@@ -0,0 +1,2 @@
+
+write_bitstream -force [file join $outdir "${top_module}.bit"]

fpga/xilinx/perf-v/scripts/impl.tcl

@@ -0,0 +1,8 @@
+
+opt_design
+
+place_design
+
+phys_opt_design
+power_opt_design
+route_design

fpga/xilinx/perf-v/scripts/init.tcl

@@ -0,0 +1,62 @@
+set prj_name {tinyriscv}
+set part_fpga {xc7a35tftg256-1}
+set top_module {tinyriscv_soc_top}
+
+set scriptsdir ./scripts
+set constrsdir ./constrs
+set outdir ./out
+set ipdir [file join $outdir ip]
+set srcdir ../../../rtl
+
+# 在某目录下递归查找所有指定文件
+proc rec_glob { basedir pattern } {
+    set dirlist [glob -nocomplain -directory $basedir -type d *]
+    set findlist [glob -nocomplain -directory $basedir $pattern]
+    foreach dir $dirlist {
+        set reclist [rec_glob $dir $pattern]
+        set findlist [concat $findlist $reclist]
+    }
+    return $findlist
+}
+
+# 创建工程(内存模式)
+create_project -part $part_fpga -in_memory
+
+# 创建sources_1
+if {[get_filesets -quiet sources_1] eq ""} {
+    create_fileset -srcset sources_1
+}
+set src_pkg_files [rec_glob $srcdir "*pkg.sv"]
+set src_verilog_files [rec_glob $srcdir "*.sv"]
+set src_all_files [concat $src_pkg_files $src_verilog_files]
+# 添加verilog文件
+add_files -norecurse -fileset sources_1 $src_all_files
+add_files -norecurse -fileset sources_1 ./tinyriscv_soc_top.sv
+
+# 创建constrs_1
+if {[get_filesets -quiet constrs_1] eq ""} {
+    create_fileset -constrset constrs_1
+}
+# 添加约束文件
+add_files -norecurse -fileset constrs_1 [glob -directory $constrsdir {*.xdc}]
+
+# 创建IP
+file mkdir $ipdir
+update_ip_catalog -rebuild
+source [file join $scriptsdir ip.tcl]
+set_property GENERATE_SYNTH_CHECKPOINT {false} [get_files -all {*.xci}]
+set obj [get_ips]
+generate_target all $obj
+export_ip_user_files -of_objects $obj -no_script -force
+read_ip [glob -directory $ipdir [file join * {*.xci}]]
+
+# 综合
+synth_design -top $top_module -include_dirs $ipdir
+
+
+#set src_pkg_files [rec_glob $srcdir "*pkg.sv"]
+#set src_verilog_files [rec_glob $srcdir "*.sv"]
+#set src_all_files [concat $src_pkg_files $src_verilog_files]
+#read_verilog -sv $src_all_files
+
+#read_xdc ./constrs/tinyriscv.xdc

fpga/xilinx/perf-v/scripts/ip.tcl

@@ -0,0 +1,9 @@
+
+create_ip -name clk_wiz -vendor xilinx.com -library ip -module_name mmcm_main_clk -dir $ipdir -force
+
+set_property -dict [list \
+CONFIG.PRIM_IN_FREQ {50.000} \
+CONFIG.CLKOUT1_REQUESTED_OUT_FREQ {25.000} \
+CONFIG.RESET_TYPE {ACTIVE_LOW} \
+CONFIG.RESET_PORT {resetn}] \
+[get_ips mmcm_main_clk]

fpga/xilinx/perf-v/scripts/report.tcl

@@ -0,0 +1,13 @@
+
+set rptdir [file join $outdir report]
+file mkdir $rptdir
+set rptutil [file join $rptdir utilization.txt]
+report_datasheet -file [file join $rptdir datasheet.txt]
+report_utilization -hierarchical -file $rptutil
+report_clock_utilization -file $rptutil -append
+report_ram_utilization -file $rptutil -append -detail
+report_timing_summary -file [file join $rptdir timing.txt] -max_paths 10
+report_high_fanout_nets -file [file join $rptdir fanout.txt] -timing -load_types -max_nets 25
+report_drc -file [file join $rptdir drc.txt]
+report_io -file [file join $rptdir io.txt]
+report_clocks -file [file join $rptdir clocks.txt]

fpga/xilinx/perf-v/scripts/synth.tcl

@@ -0,0 +1,52 @@
+proc recglob { basedir pattern } {
+  set dirlist [glob -nocomplain -directory $basedir -type d *]
+  set findlist [glob -nocomplain -directory $basedir $pattern]
+  foreach dir $dirlist {
+    set reclist [recglob $dir $pattern]
+    set findlist [concat $findlist $reclist]
+  }
+  return $findlist
+}
+
+proc findincludedir { basedir pattern } {
+  #find all subdirectories containing ".vh" files
+  set vhfiles [recglob $basedir $pattern]
+  set vhdirs {}
+  foreach match $vhfiles {
+    lappend vhdirs [file dir $match]
+  }
+  set uniquevhdirs [lsort -unique $vhdirs]
+  return $uniquevhdirs
+}
+
+
+file mkdir $ipdir
+
+source [file join $scriptsdir ip.tcl]
+
+update_ip_catalog -rebuild
+
+set obj [get_ips]
+generate_target all $obj
+
+read_ip [glob -directory $ipdir [file join * {*.xci}]]
+
+
+# AR 58526 <http://www.xilinx.com/support/answers/58526.html>
+set_property GENERATE_SYNTH_CHECKPOINT {false} [get_files -all {*.xci}]
+set obj [get_ips]
+generate_target all $obj
+export_ip_user_files -of_objects $obj -no_script -force
+
+set obj [current_fileset]
+
+# Xilinx bug workaround
+# scrape IP tree for directories containing .vh files
+# [get_property include_dirs] misses all IP core subdirectory includes if user has specified -dir flag in create_ip
+set property_include_dirs [get_property include_dirs $obj]
+set ip_include_dirs [concat $property_include_dirs [findincludedir $ipdir "*.vh"]]
+set ip_include_dirs [concat $ip_include_dirs [findincludedir $srcdir "*.h"]]
+set ip_include_dirs [concat $ip_include_dirs [findincludedir $srcdir "*.vh"]]
+
+
+synth_design -top $top_module -include_dirs $ipdir

fpga/xilinx/perf-v/tinyriscv_soc_top.sv

@@ -0,0 +1,674 @@
+ /*                                                                      
+ Copyright 2020 Blue Liang, liangkangnan@163.com
+                                                                         
+ Licensed under the Apache License, Version 2.0 (the "License");         
+ you may not use this file except in compliance with the License.        
+ You may obtain a copy of the License at                                 
+                                                                         
+     http://www.apache.org/licenses/LICENSE-2.0                          
+                                                                         
+ Unless required by applicable law or agreed to in writing, software    
+ distributed under the License is distributed on an "AS IS" BASIS,       
+ WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ See the License for the specific language governing permissions and     
+ limitations under the License.                                          
+ */
+
+`include "../../../rtl/core/defines.sv"
+`include "../../../rtl/debug/jtag_def.sv"
+
+// tinyriscv soc顶层模块
+module tinyriscv_soc_top #(
+    parameter bit          TRACE_ENABLE         = 1'b0,
+    parameter int          GPIO_NUM             = 16,
+    parameter int          I2C_NUM              = 2,
+    parameter int          UART_NUM             = 3,
+    parameter int          SPI_NUM              = 1
+    )(
+    input  wire               clk_50m_i,               // 时钟引脚
+    input  wire               rst_ext_ni,              // 复位引脚，低电平有效
+
+    output wire               halted_ind_pin,          // jtag是否已经halt住CPU，高电平有效
+
+    inout  wire[GPIO_NUM-1:0] io_pins,                 // IO引脚，1bit代表一个IO
+
+    output wire               flash_spi_clk_pin,       // flash spi clk引脚
+    output wire               flash_spi_ss_pin,        // flash spi ss引脚
+    inout  wire [3:0]         flash_spi_dq_pin,        // flash spi dq引脚
+
+    input  wire               jtag_TCK_pin,            // JTAG TCK引脚
+    input  wire               jtag_TMS_pin,            // JTAG TMS引脚
+    input  wire               jtag_TDI_pin,            // JTAG TDI引脚
+    output wire               jtag_TDO_pin             // JTAG TDO引脚
+    );
+
+    localparam int MASTERS      = 3;  // Number of master ports
+    localparam int SLAVES       = 16; // Number of slave ports
+
+    // masters
+    localparam int JtagHost     = 0;
+    localparam int CoreD        = 1;
+    localparam int CoreI        = 2;
+
+    // slaves
+    localparam int Rom          = 0;
+    localparam int Ram          = 1;
+    localparam int JtagDevice   = 2;
+    localparam int Timer0       = 3;
+    localparam int Gpio         = 4;
+    localparam int Uart0        = 5;
+    localparam int Rvic         = 6;
+    localparam int I2c0         = 7;
+    localparam int Spi0         = 8;
+    localparam int Pinmux       = 9;
+    localparam int Uart1        = 10;
+    localparam int Uart2        = 11;
+    localparam int I2c1         = 12;
+    localparam int Timer1       = 13;
+    localparam int Timer2       = 14;
+    localparam int FlashCtrl    = 15;
+
+    wire           master_req       [MASTERS];
+    wire           master_gnt       [MASTERS];
+    wire           master_rvalid    [MASTERS];
+    wire [31:0]    master_addr      [MASTERS];
+    wire           master_we        [MASTERS];
+    wire [ 3:0]    master_be        [MASTERS];
+    wire [31:0]    master_rdata     [MASTERS];
+    wire [31:0]    master_wdata     [MASTERS];
+
+    wire           slave_req        [SLAVES];
+    wire           slave_gnt        [SLAVES];
+    wire           slave_rvalid     [SLAVES];
+    wire [31:0]    slave_addr       [SLAVES];
+    wire           slave_we         [SLAVES];
+    wire [ 3:0]    slave_be         [SLAVES];
+    wire [31:0]    slave_rdata      [SLAVES];
+    wire [31:0]    slave_wdata      [SLAVES];
+
+    wire [31:0]    slave_addr_mask  [SLAVES];
+    wire [31:0]    slave_addr_base  [SLAVES];
+
+    wire clk;
+    wire ndmreset;
+    wire ndmreset_n;
+    wire debug_req;
+    wire core_halted;
+
+    reg[31:0] irq_src;
+    wire int_req;
+    wire[7:0] int_id;
+
+    wire timer0_irq;
+    wire timer1_irq;
+    wire timer2_irq;
+    wire uart0_irq;
+    wire uart1_irq;
+    wire uart2_irq;
+    wire gpio0_irq;
+    wire gpio1_irq;
+    wire i2c0_irq;
+    wire i2c1_irq;
+    wire spi0_irq;
+    wire gpio2_4_irq;
+    wire gpio5_7_irq;
+    wire gpio8_irq;
+    wire gpio9_irq;
+    wire gpio10_12_irq;
+    wire gpio13_15_irq;
+
+    wire[GPIO_NUM-1:0] gpio_data_in;
+    wire[GPIO_NUM-1:0] gpio_oe;
+    wire[GPIO_NUM-1:0] gpio_data_out;
+
+    wire[GPIO_NUM-1:0] io_data_in;
+    wire[GPIO_NUM-1:0] io_oe;
+    wire[GPIO_NUM-1:0] io_data_out;
+
+    wire[I2C_NUM-1:0] i2c_scl_in;
+    wire[I2C_NUM-1:0] i2c_scl_oe;
+    wire[I2C_NUM-1:0] i2c_scl_out;
+    wire[I2C_NUM-1:0] i2c_sda_in;
+    wire[I2C_NUM-1:0] i2c_sda_oe;
+    wire[I2C_NUM-1:0] i2c_sda_out;
+
+    wire[UART_NUM-1:0] uart_tx;
+    wire[UART_NUM-1:0] uart_rx;
+
+    wire[SPI_NUM-1:0] spi_clk_in;
+    wire[SPI_NUM-1:0] spi_clk_oe;
+    wire[SPI_NUM-1:0] spi_clk_out;
+    wire[SPI_NUM-1:0] spi_ss_in;
+    wire[SPI_NUM-1:0] spi_ss_oe;
+    wire[SPI_NUM-1:0] spi_ss_out;
+    wire[3:0]         spi_dq_in[SPI_NUM-1:0];
+    wire[3:0]         spi_dq_oe[SPI_NUM-1:0];
+    wire[3:0]         spi_dq_out[SPI_NUM-1:0];
+
+    wire[31:0]        core_instr_addr;
+    wire[31:0]        core_data_addr;
+
+    wire[3:0]         flash_spi_dq_in;
+    wire[3:0]         flash_spi_dq_oe;
+    wire[3:0]         flash_spi_dq_out;
+
+    // 中断源
+    always @ (*) begin
+        irq_src     = 32'h0;
+        irq_src[ 0] = timer0_irq;
+        irq_src[ 1] = uart0_irq;
+        irq_src[ 2] = gpio0_irq;
+        irq_src[ 3] = gpio1_irq;
+        irq_src[ 4] = i2c0_irq;
+        irq_src[ 5] = spi0_irq;
+        irq_src[ 6] = gpio2_4_irq;
+        irq_src[ 7] = gpio5_7_irq;
+        irq_src[ 8] = gpio8_irq;
+        irq_src[ 9] = gpio9_irq;
+        irq_src[10] = gpio10_12_irq;
+        irq_src[11] = gpio13_15_irq;
+        irq_src[12] = uart1_irq;
+        irq_src[13] = uart2_irq;
+        irq_src[14] = i2c1_irq;
+        irq_src[15] = timer1_irq;
+        irq_src[16] = timer2_irq;
+    end
+
+    // FPGA低电平点亮LED
+    assign halted_ind_pin = ~core_halted;
+
+    tinyriscv_core #(
+        .DEBUG_HALT_ADDR(`DEBUG_ADDR_BASE + `HaltAddress),
+        .DEBUG_EXCEPTION_ADDR(`DEBUG_ADDR_BASE + `ExceptionAddress),
+        .BranchPredictor(1'b1),
+        .TRACE_ENABLE(TRACE_ENABLE)
+    ) u_tinyriscv_core (
+        .clk            (clk),
+        .rst_n          (ndmreset_n),
+
+        .instr_req_o    (master_req[CoreI]),
+        .instr_gnt_i    (master_gnt[CoreI]),
+        .instr_rvalid_i (master_rvalid[CoreI]),
+        .instr_addr_o   (core_instr_addr),
+        .instr_rdata_i  (master_rdata[CoreI]),
+        .instr_err_i    (1'b0),
+
+        .data_req_o     (master_req[CoreD]),
+        .data_gnt_i     (master_gnt[CoreD]),
+        .data_rvalid_i  (master_rvalid[CoreD]),
+        .data_we_o      (master_we[CoreD]),
+        .data_be_o      (master_be[CoreD]),
+        .data_addr_o    (core_data_addr),
+        .data_wdata_o   (master_wdata[CoreD]),
+        .data_rdata_i   (master_rdata[CoreD]),
+        .data_err_i     (1'b0),
+
+        .int_req_i      (int_req),
+        .int_id_i       (int_id),
+
+        .debug_req_i    (debug_req)
+    );
+
+    // 是否访问flash
+    wire instr_access_flash;
+    wire data_access_flash;
+
+    assign instr_access_flash = ((core_instr_addr & (`FLASH_ADDR_MASK)) == `FLASH_ADDR_BASE);
+    assign data_access_flash  = ((core_data_addr & (`FLASH_ADDR_MASK)) == `FLASH_ADDR_BASE);
+
+    // 转换后的地址
+    wire [31:0] instr_tran_addr;
+    wire [31:0] data_tran_addr;
+
+    assign instr_tran_addr = (core_instr_addr & (~(`FLASH_CTRL_ADDR_MASK))) | `FLASH_CTRL_ADDR_BASE;
+    assign data_tran_addr  = (core_data_addr & (~(`FLASH_CTRL_ADDR_MASK))) | `FLASH_CTRL_ADDR_BASE;
+
+    // 当访问flash空间时，转去访问flash ctrl模块
+    assign master_addr[CoreI] = instr_access_flash ?  ({instr_tran_addr[31:24], 1'b1, instr_tran_addr[22:0]}) :
+                                core_instr_addr;
+    assign master_addr[CoreD] = data_access_flash ? ({data_tran_addr[31:24], 1'b1, data_tran_addr[22:0]}) :
+                                core_data_addr;
+
+    assign slave_addr_mask[Rom] = `ROM_ADDR_MASK;
+    assign slave_addr_base[Rom] = `ROM_ADDR_BASE;
+    // 1.指令存储器
+    rom #(
+        .DP(`ROM_DEPTH)
+    ) u_rom (
+        .clk_i      (clk),
+        .rst_ni     (ndmreset_n),
+        .req_i      (slave_req[Rom]),
+        .addr_i     (slave_addr[Rom]),
+        .data_i     (slave_wdata[Rom]),
+        .be_i       (slave_be[Rom]),
+        .we_i       (slave_we[Rom]),
+        .gnt_o      (slave_gnt[Rom]),
+        .rvalid_o   (slave_rvalid[Rom]),
+        .data_o     (slave_rdata[Rom])
+    );
+
+    assign slave_addr_mask[Ram] = `RAM_ADDR_MASK;
+    assign slave_addr_base[Ram] = `RAM_ADDR_BASE;
+    // 2.数据存储器
+    ram #(
+        .DP(`RAM_DEPTH)
+    ) u_ram (
+        .clk_i      (clk),
+        .rst_ni     (ndmreset_n),
+        .req_i      (slave_req[Ram]),
+        .addr_i     (slave_addr[Ram]),
+        .data_i     (slave_wdata[Ram]),
+        .be_i       (slave_be[Ram]),
+        .we_i       (slave_we[Ram]),
+        .gnt_o      (slave_gnt[Ram]),
+        .rvalid_o   (slave_rvalid[Ram]),
+        .data_o     (slave_rdata[Ram])
+    );
+
+    assign slave_addr_mask[Timer0] = `TIMER0_ADDR_MASK;
+    assign slave_addr_base[Timer0] = `TIMER0_ADDR_BASE;
+    // 3.定时器0模块
+    timer_top timer0(
+        .clk_i   (clk),
+        .rst_ni  (ndmreset_n),
+        .irq_o   (timer0_irq),
+        .req_i   (slave_req[Timer0]),
+        .we_i    (slave_we[Timer0]),
+        .be_i    (slave_be[Timer0]),
+        .addr_i  (slave_addr[Timer0]),
+        .data_i  (slave_wdata[Timer0]),
+        .gnt_o   (slave_gnt[Timer0]),
+        .rvalid_o(slave_rvalid[Timer0]),
+        .data_o  (slave_rdata[Timer0])
+    );
+
+    assign slave_addr_mask[Timer1] = `TIMER1_ADDR_MASK;
+    assign slave_addr_base[Timer1] = `TIMER1_ADDR_BASE;
+    // 4.定时器1模块
+    timer_top timer1(
+        .clk_i   (clk),
+        .rst_ni  (ndmreset_n),
+        .irq_o   (timer1_irq),
+        .req_i   (slave_req[Timer1]),
+        .we_i    (slave_we[Timer1]),
+        .be_i    (slave_be[Timer1]),
+        .addr_i  (slave_addr[Timer1]),
+        .data_i  (slave_wdata[Timer1]),
+        .gnt_o   (slave_gnt[Timer1]),
+        .rvalid_o(slave_rvalid[Timer1]),
+        .data_o  (slave_rdata[Timer1])
+    );
+
+    assign slave_addr_mask[Timer2] = `TIMER2_ADDR_MASK;
+    assign slave_addr_base[Timer2] = `TIMER2_ADDR_BASE;
+    // 5.定时器2模块
+    timer_top timer2(
+        .clk_i   (clk),
+        .rst_ni  (ndmreset_n),
+        .irq_o   (timer2_irq),
+        .req_i   (slave_req[Timer2]),
+        .we_i    (slave_we[Timer2]),
+        .be_i    (slave_be[Timer2]),
+        .addr_i  (slave_addr[Timer2]),
+        .data_i  (slave_wdata[Timer2]),
+        .gnt_o   (slave_gnt[Timer2]),
+        .rvalid_o(slave_rvalid[Timer2]),
+        .data_o  (slave_rdata[Timer2])
+    );
+
+    assign slave_addr_mask[Gpio] = `GPIO_ADDR_MASK;
+    assign slave_addr_base[Gpio] = `GPIO_ADDR_BASE;
+    // 6.GPIO模块
+    gpio_top #(
+        .GPIO_NUM(GPIO_NUM)
+    ) u_gpio (
+        .clk_i          (clk),
+        .rst_ni         (ndmreset_n),
+        .gpio_oe_o      (gpio_oe),
+        .gpio_data_o    (gpio_data_out),
+        .gpio_data_i    (gpio_data_in),
+        .irq_gpio0_o    (gpio0_irq),
+        .irq_gpio1_o    (gpio1_irq),
+        .irq_gpio2_4_o  (gpio2_4_irq),
+        .irq_gpio5_7_o  (gpio5_7_irq),
+        .irq_gpio8_o    (gpio8_irq),
+        .irq_gpio9_o    (gpio9_irq),
+        .irq_gpio10_12_o(gpio10_12_irq),
+        .irq_gpio13_15_o(gpio13_15_irq),
+        .req_i          (slave_req[Gpio]),
+        .we_i           (slave_we[Gpio]),
+        .be_i           (slave_be[Gpio]),
+        .addr_i         (slave_addr[Gpio]),
+        .data_i         (slave_wdata[Gpio]),
+        .gnt_o          (slave_gnt[Gpio]),
+        .rvalid_o       (slave_rvalid[Gpio]),
+        .data_o         (slave_rdata[Gpio])
+    );
+
+    assign slave_addr_mask[Uart0] = `UART0_ADDR_MASK;
+    assign slave_addr_base[Uart0] = `UART0_ADDR_BASE;
+    // 7.串口0模块
+    uart_top uart0 (
+        .clk_i      (clk),
+        .rst_ni     (ndmreset_n),
+        .rx_i       (uart_rx[0]),
+        .tx_o       (uart_tx[0]),
+        .irq_o      (uart0_irq),
+        .req_i      (slave_req[Uart0]),
+        .we_i       (slave_we[Uart0]),
+        .be_i       (slave_be[Uart0]),
+        .addr_i     (slave_addr[Uart0]),
+        .data_i     (slave_wdata[Uart0]),
+        .gnt_o      (slave_gnt[Uart0]),
+        .rvalid_o   (slave_rvalid[Uart0]),
+        .data_o     (slave_rdata[Uart0])
+    );
+
+    assign slave_addr_mask[Uart1] = `UART1_ADDR_MASK;
+    assign slave_addr_base[Uart1] = `UART1_ADDR_BASE;
+    // 8.串口1模块
+    uart_top uart1 (
+        .clk_i      (clk),
+        .rst_ni     (ndmreset_n),
+        .rx_i       (uart_rx[1]),
+        .tx_o       (uart_tx[1]),
+        .irq_o      (uart1_irq),
+        .req_i      (slave_req[Uart1]),
+        .we_i       (slave_we[Uart1]),
+        .be_i       (slave_be[Uart1]),
+        .addr_i     (slave_addr[Uart1]),
+        .data_i     (slave_wdata[Uart1]),
+        .gnt_o      (slave_gnt[Uart1]),
+        .rvalid_o   (slave_rvalid[Uart1]),
+        .data_o     (slave_rdata[Uart1])
+    );
+
+    assign slave_addr_mask[Uart2] = `UART2_ADDR_MASK;
+    assign slave_addr_base[Uart2] = `UART2_ADDR_BASE;
+    // 9.串口2模块
+    uart_top uart2 (
+        .clk_i      (clk),
+        .rst_ni     (ndmreset_n),
+        .rx_i       (uart_rx[2]),
+        .tx_o       (uart_tx[2]),
+        .irq_o      (uart2_irq),
+        .req_i      (slave_req[Uart2]),
+        .we_i       (slave_we[Uart2]),
+        .be_i       (slave_be[Uart2]),
+        .addr_i     (slave_addr[Uart2]),
+        .data_i     (slave_wdata[Uart2]),
+        .gnt_o      (slave_gnt[Uart2]),
+        .rvalid_o   (slave_rvalid[Uart2]),
+        .data_o     (slave_rdata[Uart2])
+    );
+
+    assign slave_addr_mask[Rvic] = `RVIC_ADDR_MASK;
+    assign slave_addr_base[Rvic] = `RVIC_ADDR_BASE;
+    // 10.中断控制器模块
+    rvic_top u_rvic(
+        .clk_i      (clk),
+        .rst_ni     (ndmreset_n),
+        .src_i      (irq_src),
+        .irq_o      (int_req),
+        .irq_id_o   (int_id),
+        .req_i      (slave_req[Rvic]),
+        .we_i       (slave_we[Rvic]),
+        .be_i       (slave_be[Rvic]),
+        .addr_i     (slave_addr[Rvic]),
+        .data_i     (slave_wdata[Rvic]),
+        .gnt_o      (slave_gnt[Rvic]),
+        .rvalid_o   (slave_rvalid[Rvic]),
+        .data_o     (slave_rdata[Rvic])
+    );
+
+    assign slave_addr_mask[I2c0] = `I2C0_ADDR_MASK;
+    assign slave_addr_base[I2c0] = `I2C0_ADDR_BASE;
+    // 11.I2C0模块
+    i2c_top i2c0(
+        .clk_i      (clk),
+        .rst_ni     (ndmreset_n),
+        .scl_o      (i2c_scl_out[0]),
+        .scl_oe_o   (i2c_scl_oe[0]),
+        .scl_i      (i2c_scl_in[0]),
+        .sda_o      (i2c_sda_out[0]),
+        .sda_oe_o   (i2c_sda_oe[0]),
+        .sda_i      (i2c_sda_in[0]),
+        .irq_o      (i2c0_irq),
+        .req_i      (slave_req[I2c0]),
+        .we_i       (slave_we[I2c0]),
+        .be_i       (slave_be[I2c0]),
+        .addr_i     (slave_addr[I2c0]),
+        .data_i     (slave_wdata[I2c0]),
+        .gnt_o      (slave_gnt[I2c0]),
+        .rvalid_o   (slave_rvalid[I2c0]),
+        .data_o     (slave_rdata[I2c0])
+    );
+
+    assign slave_addr_mask[I2c1] = `I2C1_ADDR_MASK;
+    assign slave_addr_base[I2c1] = `I2C1_ADDR_BASE;
+    // 12.I2C1模块
+    i2c_top i2c1(
+        .clk_i      (clk),
+        .rst_ni     (ndmreset_n),
+        .scl_o      (i2c_scl_out[1]),
+        .scl_oe_o   (i2c_scl_oe[1]),
+        .scl_i      (i2c_scl_in[1]),
+        .sda_o      (i2c_sda_out[1]),
+        .sda_oe_o   (i2c_sda_oe[1]),
+        .sda_i      (i2c_sda_in[1]),
+        .irq_o      (i2c1_irq),
+        .req_i      (slave_req[I2c1]),
+        .we_i       (slave_we[I2c1]),
+        .be_i       (slave_be[I2c1]),
+        .addr_i     (slave_addr[I2c1]),
+        .data_i     (slave_wdata[I2c1]),
+        .gnt_o      (slave_gnt[I2c1]),
+        .rvalid_o   (slave_rvalid[I2c1]),
+        .data_o     (slave_rdata[I2c1])
+    );
+
+    assign slave_addr_mask[Spi0] = `SPI0_ADDR_MASK;
+    assign slave_addr_base[Spi0] = `SPI0_ADDR_BASE;
+    // 13.SPI0模块
+    spi_top spi0(
+        .clk_i      (clk),
+        .rst_ni     (ndmreset_n),
+        .spi_clk_i  (spi_clk_in[0]),
+        .spi_clk_o  (spi_clk_out[0]),
+        .spi_clk_oe_o(spi_clk_oe[0]),
+        .spi_ss_i   (spi_ss_in[0]),
+        .spi_ss_o   (spi_ss_out[0]),
+        .spi_ss_oe_o(spi_ss_oe[0]),
+        .spi_dq0_i  (spi_dq_in[0][0]),
+        .spi_dq0_o  (spi_dq_out[0][0]),
+        .spi_dq0_oe_o(spi_dq_oe[0][0]),
+        .spi_dq1_i  (spi_dq_in[0][1]),
+        .spi_dq1_o  (spi_dq_out[0][1]),
+        .spi_dq1_oe_o(spi_dq_oe[0][1]),
+        .spi_dq2_i  (spi_dq_in[0][2]),
+        .spi_dq2_o  (spi_dq_out[0][2]),
+        .spi_dq2_oe_o(spi_dq_oe[0][2]),
+        .spi_dq3_i  (spi_dq_in[0][3]),
+        .spi_dq3_o  (spi_dq_out[0][3]),
+        .spi_dq3_oe_o(spi_dq_oe[0][3]),
+        .irq_o      (spi0_irq),
+        .req_i      (slave_req[Spi0]),
+        .we_i       (slave_we[Spi0]),
+        .be_i       (slave_be[Spi0]),
+        .addr_i     (slave_addr[Spi0]),
+        .data_i     (slave_wdata[Spi0]),
+        .gnt_o      (slave_gnt[Spi0]),
+        .rvalid_o   (slave_rvalid[Spi0]),
+        .data_o     (slave_rdata[Spi0])
+    );
+
+    for (genvar i = 0; i < GPIO_NUM; i = i + 1) begin : g_io_data
+        assign io_pins[i] = io_oe[i] ? io_data_out[i] : 1'bz;
+        assign io_data_in[i] = io_pins[i];
+    end
+
+    assign slave_addr_mask[Pinmux] = `PINMUX_ADDR_MASK;
+    assign slave_addr_base[Pinmux] = `PINMUX_ADDR_BASE;
+    // 14.PINMUX模块
+    pinmux_top #(
+        .GPIO_NUM(GPIO_NUM),
+        .I2C_NUM(I2C_NUM),
+        .UART_NUM(UART_NUM),
+        .SPI_NUM(SPI_NUM)
+    ) u_pinmux (
+        .clk_i          (clk),
+        .rst_ni         (ndmreset_n),
+        .gpio_oe_i      (gpio_oe),
+        .gpio_val_i     (gpio_data_out),
+        .gpio_val_o     (gpio_data_in),
+        .i2c_sda_oe_i   (i2c_sda_oe),
+        .i2c_sda_val_i  (i2c_sda_out),
+        .i2c_sda_val_o  (i2c_sda_in),
+        .i2c_scl_oe_i   (i2c_scl_oe),
+        .i2c_scl_val_i  (i2c_scl_out),
+        .i2c_scl_val_o  (i2c_scl_in),
+        .uart_tx_oe_i   ({UART_NUM{1'b1}}),
+        .uart_tx_val_i  (uart_tx),
+        .uart_tx_val_o  (),
+        .uart_rx_oe_i   ({UART_NUM{1'b0}}),
+        .uart_rx_val_i  (),
+        .uart_rx_val_o  (uart_rx),
+        .spi_clk_oe_i   (spi_clk_oe),
+        .spi_clk_val_i  (spi_clk_out),
+        .spi_clk_val_o  (spi_clk_in),
+        .spi_ss_oe_i    (spi_ss_oe),
+        .spi_ss_val_i   (spi_ss_out),
+        .spi_ss_val_o   (spi_ss_in),
+        .spi_dq_oe_i    (spi_dq_oe),
+        .spi_dq_val_i   (spi_dq_out),
+        .spi_dq_val_o   (spi_dq_in),
+        .io_val_i       (io_data_in),
+        .io_val_o       (io_data_out),
+        .io_oe_o        (io_oe),
+        .req_i          (slave_req[Pinmux]),
+        .we_i           (slave_we[Pinmux]),
+        .be_i           (slave_be[Pinmux]),
+        .addr_i         (slave_addr[Pinmux]),
+        .data_i         (slave_wdata[Pinmux]),
+        .gnt_o          (slave_gnt[Pinmux]),
+        .rvalid_o       (slave_rvalid[Pinmux]),
+        .data_o         (slave_rdata[Pinmux])
+    );
+
+    for (genvar j = 0; j < 4; j = j + 1) begin : g_spi_pin_data
+        assign flash_spi_dq_pin[j] = flash_spi_dq_oe[j] ? flash_spi_dq_out[j] : 1'bz;
+        assign flash_spi_dq_in[j] = flash_spi_dq_pin[j];
+    end
+
+    assign slave_addr_mask[FlashCtrl] = `FLASH_CTRL_ADDR_MASK;
+    assign slave_addr_base[FlashCtrl] = `FLASH_CTRL_ADDR_BASE;
+    // 15.flash ctrl模块
+    flash_ctrl_top flash_ctrl (
+        .clk_i          (clk),
+        .rst_ni         (ndmreset_n),
+        .spi_clk_o      (flash_spi_clk_pin),
+        .spi_clk_oe_o   (),
+        .spi_ss_o       (flash_spi_ss_pin),
+        .spi_ss_oe_o    (),
+        .spi_dq0_i      (flash_spi_dq_in[0]),
+        .spi_dq0_o      (flash_spi_dq_out[0]),
+        .spi_dq0_oe_o   (flash_spi_dq_oe[0]),
+        .spi_dq1_i      (flash_spi_dq_in[1]),
+        .spi_dq1_o      (flash_spi_dq_out[1]),
+        .spi_dq1_oe_o   (flash_spi_dq_oe[1]),
+        .spi_dq2_i      (flash_spi_dq_in[2]),
+        .spi_dq2_o      (flash_spi_dq_out[2]),
+        .spi_dq2_oe_o   (flash_spi_dq_oe[2]),
+        .spi_dq3_i      (flash_spi_dq_in[3]),
+        .spi_dq3_o      (flash_spi_dq_out[3]),
+        .spi_dq3_oe_o   (flash_spi_dq_oe[3]),
+        .req_i          (slave_req[FlashCtrl]),
+        .we_i           (slave_we[FlashCtrl]),
+        .be_i           (slave_be[FlashCtrl]),
+        .addr_i         (slave_addr[FlashCtrl]),
+        .data_i         (slave_wdata[FlashCtrl]),
+        .gnt_o          (slave_gnt[FlashCtrl]),
+        .rvalid_o       (slave_rvalid[FlashCtrl]),
+        .data_o         (slave_rdata[FlashCtrl])
+    );
+
+    // 内部总线
+    obi_interconnect #(
+        .MASTERS(MASTERS),
+        .SLAVES(SLAVES)
+    ) bus (
+        .clk_i              (clk),
+        .rst_ni             (ndmreset_n),
+        .master_req_i       (master_req),
+        .master_gnt_o       (master_gnt),
+        .master_rvalid_o    (master_rvalid),
+        .master_we_i        (master_we),
+        .master_be_i        (master_be),
+        .master_addr_i      (master_addr),
+        .master_wdata_i     (master_wdata),
+        .master_rdata_o     (master_rdata),
+        .slave_addr_mask_i  (slave_addr_mask),
+        .slave_addr_base_i  (slave_addr_base),
+        .slave_req_o        (slave_req),
+        .slave_gnt_i        (slave_gnt),
+        .slave_rvalid_i     (slave_rvalid),
+        .slave_we_o         (slave_we),
+        .slave_be_o         (slave_be),
+        .slave_addr_o       (slave_addr),
+        .slave_wdata_o      (slave_wdata),
+        .slave_rdata_i      (slave_rdata)
+    );
+
+    // 使用xilinx vivado中的mmcm IP进行分频
+    // 输入为50MHZ，输出为25MHZ
+    mmcm_main_clk u_mmcm_main_clk(
+      .clk_out1(clk),
+      .resetn(rst_ext_ni),
+      .clk_in1(clk_50m_i)
+    );
+
+    // 复位信号产生
+    rst_gen #(
+        .RESET_FIFO_DEPTH(5)
+    ) u_rst (
+        .clk    (clk),
+        .rst_ni (rst_ext_ni & (~ndmreset)),
+        .rst_no (ndmreset_n)
+    );
+
+    assign slave_addr_mask[JtagDevice] = `DEBUG_ADDR_MASK;
+    assign slave_addr_base[JtagDevice] = `DEBUG_ADDR_BASE;
+    // JTAG模块
+    jtag_top #(
+
+    ) u_jtag (
+        .clk_i              (clk),
+        .rst_ni             (rst_ext_ni),
+        .debug_req_o        (debug_req),
+        .ndmreset_o         (ndmreset),
+        .halted_o           (core_halted),
+        .jtag_tck_i         (jtag_TCK_pin),
+        .jtag_tdi_i         (jtag_TDI_pin),
+        .jtag_tms_i         (jtag_TMS_pin),
+        .jtag_trst_ni       (rst_ext_ni),
+        .jtag_tdo_o         (jtag_TDO_pin),
+        .master_req_o       (master_req[JtagHost]),
+        .master_gnt_i       (master_gnt[JtagHost]),
+        .master_rvalid_i    (master_rvalid[JtagHost]),
+        .master_we_o        (master_we[JtagHost]),
+        .master_be_o        (master_be[JtagHost]),
+        .master_addr_o      (master_addr[JtagHost]),
+        .master_wdata_o     (master_wdata[JtagHost]),
+        .master_rdata_i     (master_rdata[JtagHost]),
+        .master_err_i       (1'b0),
+        .slave_req_i        (slave_req[JtagDevice]),
+        .slave_we_i         (slave_we[JtagDevice]),
+        .slave_addr_i       (slave_addr[JtagDevice]),
+        .slave_be_i         (slave_be[JtagDevice]),
+        .slave_wdata_i      (slave_wdata[JtagDevice]),
+        .slave_gnt_o        (slave_gnt[JtagDevice]),
+        .slave_rvalid_o     (slave_rvalid[JtagDevice]),
+        .slave_rdata_o      (slave_rdata[JtagDevice])
+    );
+
+endmodule

rtl.flist

@@ -0,0 +1,94 @@
++incdir+../rtl/core
++incdir+../rtl/debug
+
+../rtl/core/csr_reg.sv
+../rtl/core/csr.sv
+../rtl/core/defines.sv
+../rtl/core/divider.sv
+../rtl/core/exception.sv
+../rtl/core/exu.sv
+../rtl/core/exu_alu_datapath.sv
+../rtl/core/exu_commit.sv
+../rtl/core/exu_dispatch.sv
+../rtl/core/exu_mem.sv
+../rtl/core/exu_muldiv.sv
+../rtl/core/gpr_reg.sv
+../rtl/core/idu.sv
+../rtl/core/idu_exu.sv
+../rtl/core/ifu.sv
+../rtl/core/ifu_idu.sv
+../rtl/core/pipe_ctrl.sv
+../rtl/core/rst_gen.sv
+../rtl/core/tinyriscv_core.sv
+../rtl/core/tracer.sv
+../rtl/core/bpu.sv
+
+../rtl/debug/jtag_def.sv
+../rtl/debug/jtag_tap.sv
+../rtl/debug/jtag_dtm.sv
+../rtl/debug/jtag_dmi.sv
+../rtl/debug/jtag_dm.sv
+../rtl/debug/jtag_mem.sv
+../rtl/debug/jtag_sba.sv
+../rtl/debug/jtag_top.sv
+../rtl/debug/debug_rom.sv
+
+../rtl/perips/ram.sv
+../rtl/perips/rom.sv
+../rtl/perips/uart/uart_reg_pkg.sv
+../rtl/perips/uart/uart_reg_top.sv
+../rtl/perips/uart/uart_core.sv
+../rtl/perips/uart/uart_rx.sv
+../rtl/perips/uart/uart_top.sv
+../rtl/perips/uart/uart_tx.sv
+../rtl/perips/timer/timer_reg_pkg.sv
+../rtl/perips/timer/timer_reg_top.sv
+../rtl/perips/timer/timer_core.sv
+../rtl/perips/timer/timer_top.sv
+../rtl/perips/gpio/gpio_reg_pkg.sv
+../rtl/perips/gpio/gpio_reg_top.sv
+../rtl/perips/gpio/gpio_core.sv
+../rtl/perips/gpio/gpio_top.sv
+../rtl/perips/rvic/rvic_reg_pkg.sv
+../rtl/perips/rvic/rvic_reg_top.sv
+../rtl/perips/rvic/rvic_core.sv
+../rtl/perips/rvic/rvic_top.sv
+../rtl/perips/i2c/i2c_reg_pkg.sv
+../rtl/perips/i2c/i2c_reg_top.sv
+../rtl/perips/i2c/i2c_core.sv
+../rtl/perips/i2c/i2c_top.sv
+../rtl/perips/i2c/i2c_master.sv
+../rtl/perips/i2c/i2c_slave.sv
+../rtl/perips/spi/spi_reg_pkg.sv
+../rtl/perips/spi/spi_reg_top.sv
+../rtl/perips/spi/spi_core.sv
+../rtl/perips/spi/spi_top.sv
+../rtl/perips/spi/spi_master.sv
+../rtl/perips/spi/spi_transmit_byte.sv
+../rtl/perips/pinmux/pinmux_reg_pkg.sv
+../rtl/perips/pinmux/pinmux_reg_top.sv
+../rtl/perips/pinmux/pinmux_core.sv
+../rtl/perips/pinmux/pinmux_top.sv
+../rtl/perips/xip/xip_top.sv
+../rtl/perips/xip/xip_core.sv
+../rtl/perips/xip/xip_w25q64_ctrl.sv
+../rtl/perips/xip/spi_master_transmit.sv
+../rtl/perips/bootrom/bootrom_top.sv
+
+../rtl/sys_bus/obi_interconnect.sv
+../rtl/sys_bus/obi_interconnect_master_sel.sv
+../rtl/sys_bus/obi_interconnect_slave_sel.sv
+
+../rtl/utils/gen_buf.sv
+../rtl/utils/gen_dff.sv
+../rtl/utils/gen_ram.sv
+../rtl/utils/cdc_2phase.sv
+../rtl/utils/sync_fifo.sv
+../rtl/utils/clk_div.sv
+../rtl/utils/edge_detect.sv
+../rtl/utils/prim_subreg.sv
+../rtl/utils/prim_subreg_arb.sv
+../rtl/utils/prim_subreg_ext.sv
+../rtl/utils/prim_filter.sv
+../rtl/utils/up_counter.sv
+../rtl/utils/async_fifo.sv

rtl/core/bpu.sv

@@ -0,0 +1,62 @@
+ /*                                                                      
+ Copyright 2021 Blue Liang, liangkangnan@163.com
+                                                                         
+ Licensed under the Apache License, Version 2.0 (the "License");         
+ you may not use this file except in compliance with the License.        
+ You may obtain a copy of the License at                                 
+                                                                         
+     http://www.apache.org/licenses/LICENSE-2.0                          
+                                                                         
+ Unless required by applicable law or agreed to in writing, software    
+ distributed under the License is distributed on an "AS IS" BASIS,       
+ WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ See the License for the specific language governing permissions and     
+ limitations under the License.                                          
+ */
+
+`include "defines.sv"
+
+// 静态分支预测模块
+module bpu(
+
+	input wire clk,
+	input wire rst_n,
+
+    input wire[31:0] inst_i,
+    input wire inst_valid_i,
+    input wire[31:0] pc_i,
+
+    output wire prdt_taken_o,
+    output wire[31:0] prdt_addr_o
+
+    );
+
+    wire[6:0] opcode = inst_i[6:0];
+
+    wire opcode_1100011 = (opcode == 7'b1100011);
+    wire opcode_1101111 = (opcode == 7'b1101111);
+
+    wire inst_type_branch = opcode_1100011;
+    wire inst_jal = opcode_1101111;
+
+    wire[31:0] inst_b_type_imm = {{20{inst_i[31]}}, inst_i[7], inst_i[30:25], inst_i[11:8], 1'b0};
+    wire[31:0] inst_j_type_imm = {{12{inst_i[31]}}, inst_i[19:12], inst_i[20], inst_i[30:21], 1'b0};
+
+    wire prdt_taken = (inst_type_branch & inst_b_type_imm[31]) | inst_jal;
+
+    reg[31:0] prdt_imm;
+
+    always @ (*) begin
+        prdt_imm = inst_b_type_imm;
+
+        case (1'b1)
+            inst_type_branch: prdt_imm = inst_b_type_imm;
+            inst_jal:         prdt_imm = inst_j_type_imm;
+            default: ;
+        endcase
+    end
+
+    assign prdt_taken_o = inst_valid_i ? prdt_taken : 1'b0;
+    assign prdt_addr_o = pc_i + prdt_imm;
+
+endmodule

rtl/core/clint.v

@@ -1,242 +0,0 @@
- /*                                                                      
- Copyright 2020 Blue Liang, liangkangnan@163.com
-                                                                         
- Licensed under the Apache License, Version 2.0 (the "License");         
- you may not use this file except in compliance with the License.        
- You may obtain a copy of the License at                                 
-                                                                         
-     http://www.apache.org/licenses/LICENSE-2.0                          
-                                                                         
- Unless required by applicable law or agreed to in writing, software    
- distributed under the License is distributed on an "AS IS" BASIS,       
- WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- See the License for the specific language governing permissions and     
- limitations under the License.                                          
- */
-
-`include "defines.v"
-
-
-// core local interruptor module
-// 核心中断管理、仲裁模块
-module clint(
-
-    input wire clk,
-    input wire rst,
-
-    // from core
-    input wire[`INT_BUS] int_flag_i,         // 中断输入信号
-
-    // from id
-    input wire[`InstBus] inst_i,             // 指令内容
-    input wire[`InstAddrBus] inst_addr_i,    // 指令地址
-
-    // from ex
-    input wire jump_flag_i,
-    input wire[`InstAddrBus] jump_addr_i,
-    input wire div_started_i,
-
-    // from ctrl
-    input wire[`Hold_Flag_Bus] hold_flag_i,  // 流水线暂停标志
-
-    // from csr_reg
-    input wire[`RegBus] data_i,              // CSR寄存器输入数据
-    input wire[`RegBus] csr_mtvec,           // mtvec寄存器
-    input wire[`RegBus] csr_mepc,            // mepc寄存器
-    input wire[`RegBus] csr_mstatus,         // mstatus寄存器
-
-    input wire global_int_en_i,              // 全局中断使能标志
-
-    // to ctrl
-    output wire hold_flag_o,                 // 流水线暂停标志
-
-    // to csr_reg
-    output reg we_o,                         // 写CSR寄存器标志
-    output reg[`MemAddrBus] waddr_o,         // 写CSR寄存器地址
-    output reg[`MemAddrBus] raddr_o,         // 读CSR寄存器地址
-    output reg[`RegBus] data_o,              // 写CSR寄存器数据
-
-    // to ex
-    output reg[`InstAddrBus] int_addr_o,     // 中断入口地址
-    output reg int_assert_o                  // 中断标志
-
-    );
-
-
-    // 中断状态定义
-    localparam S_INT_IDLE            = 4'b0001;
-    localparam S_INT_SYNC_ASSERT     = 4'b0010;
-    localparam S_INT_ASYNC_ASSERT    = 4'b0100;
-    localparam S_INT_MRET            = 4'b1000;
-
-    // 写CSR寄存器状态定义
-    localparam S_CSR_IDLE            = 5'b00001;
-    localparam S_CSR_MSTATUS         = 5'b00010;
-    localparam S_CSR_MEPC            = 5'b00100;
-    localparam S_CSR_MSTATUS_MRET    = 5'b01000;
-    localparam S_CSR_MCAUSE          = 5'b10000;
-
-    reg[3:0] int_state;
-    reg[4:0] csr_state;
-    reg[`InstAddrBus] inst_addr;
-    reg[31:0] cause;
-
-
-    assign hold_flag_o = ((int_state != S_INT_IDLE) | (csr_state != S_CSR_IDLE))? `HoldEnable: `HoldDisable;
-
-
-    // 中断仲裁逻辑
-    always @ (*) begin
-        if (rst == `RstEnable) begin
-            int_state = S_INT_IDLE;
-        end else begin
-            if (inst_i == `INST_ECALL || inst_i == `INST_EBREAK) begin
-                // 如果执行阶段的指令为除法指令，则先不处理同步中断，等除法指令执行完再处理
-                if (div_started_i == `DivStop) begin
-                    int_state = S_INT_SYNC_ASSERT;
-                end else begin
-                    int_state = S_INT_IDLE;
-                end
-            end else if (int_flag_i != `INT_NONE && global_int_en_i == `True) begin
-                int_state = S_INT_ASYNC_ASSERT;
-            end else if (inst_i == `INST_MRET) begin
-                int_state = S_INT_MRET;
-            end else begin
-                int_state = S_INT_IDLE;
-            end
-        end
-    end
-
-    // 写CSR寄存器状态切换
-    always @ (posedge clk) begin
-        if (rst == `RstEnable) begin
-            csr_state <= S_CSR_IDLE;
-            cause <= `ZeroWord;
-            inst_addr <= `ZeroWord;
-        end else begin
-            case (csr_state)
-                S_CSR_IDLE: begin
-                    // 同步中断
-                    if (int_state == S_INT_SYNC_ASSERT) begin
-                        csr_state <= S_CSR_MEPC;
-                        // 在中断处理函数里会将中断返回地址加4
-                        if (jump_flag_i == `JumpEnable) begin
-                            inst_addr <= jump_addr_i - 4'h4;
-                        end else begin
-                            inst_addr <= inst_addr_i;
-                        end
-                        case (inst_i)
-                            `INST_ECALL: begin
-                                cause <= 32'd11;
-                            end
-                            `INST_EBREAK: begin
-                                cause <= 32'd3;
-                            end
-                            default: begin
-                                cause <= 32'd10;
-                            end
-                        endcase
-                    // 异步中断
-                    end else if (int_state == S_INT_ASYNC_ASSERT) begin
-                        // 定时器中断
-                        cause <= 32'h80000004;
-                        csr_state <= S_CSR_MEPC;
-                        if (jump_flag_i == `JumpEnable) begin
-                            inst_addr <= jump_addr_i;
-                        // 异步中断可以中断除法指令的执行，中断处理完再重新执行除法指令
-                        end else if (div_started_i == `DivStart) begin
-                            inst_addr <= inst_addr_i - 4'h4;
-                        end else begin
-                            inst_addr <= inst_addr_i;
-                        end
-                    // 中断返回
-                    end else if (int_state == S_INT_MRET) begin
-                        csr_state <= S_CSR_MSTATUS_MRET;
-                    end
-                end
-                S_CSR_MEPC: begin
-                    csr_state <= S_CSR_MSTATUS;
-                end
-                S_CSR_MSTATUS: begin
-                    csr_state <= S_CSR_MCAUSE;
-                end
-                S_CSR_MCAUSE: begin
-                    csr_state <= S_CSR_IDLE;
-                end
-                S_CSR_MSTATUS_MRET: begin
-                    csr_state <= S_CSR_IDLE;
-                end
-                default: begin
-                    csr_state <= S_CSR_IDLE;
-                end
-            endcase
-        end
-    end
-
-    // 发出中断信号前，先写几个CSR寄存器
-    always @ (posedge clk) begin
-        if (rst == `RstEnable) begin
-            we_o <= `WriteDisable;
-            waddr_o <= `ZeroWord;
-            data_o <= `ZeroWord;
-        end else begin
-            case (csr_state)
-                // 将mepc寄存器的值设为当前指令地址
-                S_CSR_MEPC: begin
-                    we_o <= `WriteEnable;
-                    waddr_o <= {20'h0, `CSR_MEPC};
-                    data_o <= inst_addr;
-                end
-                // 写中断产生的原因
-                S_CSR_MCAUSE: begin
-                    we_o <= `WriteEnable;
-                    waddr_o <= {20'h0, `CSR_MCAUSE};
-                    data_o <= cause;
-                end
-                // 关闭全局中断
-                S_CSR_MSTATUS: begin
-                    we_o <= `WriteEnable;
-                    waddr_o <= {20'h0, `CSR_MSTATUS};
-                    data_o <= {csr_mstatus[31:4], 1'b0, csr_mstatus[2:0]};
-                end
-                // 中断返回
-                S_CSR_MSTATUS_MRET: begin
-                    we_o <= `WriteEnable;
-                    waddr_o <= {20'h0, `CSR_MSTATUS};
-                    data_o <= {csr_mstatus[31:4], csr_mstatus[7], csr_mstatus[2:0]};
-                end
-                default: begin
-                    we_o <= `WriteDisable;
-                    waddr_o <= `ZeroWord;
-                    data_o <= `ZeroWord;
-                end
-            endcase
-        end
-    end
-
-    // 发出中断信号给ex模块
-    always @ (posedge clk) begin
-        if (rst == `RstEnable) begin
-            int_assert_o <= `INT_DEASSERT;
-            int_addr_o <= `ZeroWord;
-        end else begin
-            case (csr_state)
-                // 发出中断进入信号.写完mcause寄存器才能发
-                S_CSR_MCAUSE: begin
-                    int_assert_o <= `INT_ASSERT;
-                    int_addr_o <= csr_mtvec;
-                end
-                // 发出中断返回信号
-                S_CSR_MSTATUS_MRET: begin
-                    int_assert_o <= `INT_ASSERT;
-                    int_addr_o <= csr_mepc;
-                end
-                default: begin
-                    int_assert_o <= `INT_DEASSERT;
-                    int_addr_o <= `ZeroWord;
-                end
-            endcase
-        end
-    end
-
-endmodule

rtl/core/csr.sv

@@ -1,5 +1,5 @@
  /*                                                                      
- Copyright 2019 Blue Liang, liangkangnan@163.com
+ Copyright 2021 Blue Liang, liangkangnan@163.com
                                                                          
  Licensed under the Apache License, Version 2.0 (the "License");         
  you may not use this file except in compliance with the License.        
@@ -14,37 +14,30 @@
  limitations under the License.                                          
  */
 
-`include "../core/defines.v"
-
-// ram module
-module ram(
+module csr #(
+    parameter RESET_VAL = 32'h0,
+    parameter WIDTH     = 32
+    )(
 
     input  wire             clk,
-    input wire rst,
+    input  wire             rst_n,
 
-    input wire we_i,                   // write enable
-    input wire[`MemAddrBus] addr_i,    // addr
-    input wire[`MemBus] data_i,
-
-    output reg[`MemBus] data_o         // read data
+    input  wire [WIDTH-1:0] wdata_i,
+    input  wire             we_i,
+    output wire [WIDTH-1:0] rdata_o
 
     );
 
-    reg[`MemBus] _ram[0:`MemNum - 1];
+    reg[WIDTH-1:0] rdata_q;
 
-
-    always @ (posedge clk) begin
-        if (we_i == `WriteEnable) begin
-            _ram[addr_i[31:2]] <= data_i;
+    always @ (posedge clk or negedge rst_n) begin
+        if (!rst_n) begin
+            rdata_q <= RESET_VAL;
+        end else if (we_i) begin
+            rdata_q <= wdata_i;
         end
     end
 
-    always @ (*) begin
-        if (rst == `RstEnable) begin
-            data_o = `ZeroWord;
-        end else begin
-            data_o = _ram[addr_i[31:2]];
-        end
-    end
+    assign rdata_o = rdata_q;
 
 endmodule

rtl/core/csr_reg.sv

@@ -0,0 +1,517 @@
+ /*                                                                      
+ Copyright 2020 Blue Liang, liangkangnan@163.com
+                                                                         
+ Licensed under the Apache License, Version 2.0 (the "License");         
+ you may not use this file except in compliance with the License.        
+ You may obtain a copy of the License at                                 
+                                                                         
+     http://www.apache.org/licenses/LICENSE-2.0                          
+                                                                         
+ Unless required by applicable law or agreed to in writing, software    
+ distributed under the License is distributed on an "AS IS" BASIS,       
+ WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ See the License for the specific language governing permissions and     
+ limitations under the License.                                          
+ */
+
+`include "defines.sv"
+
+// CSR寄存器模块
+module csr_reg(
+
+    input wire clk,
+    input wire rst_n,
+
+    // from exu
+    input wire exu_we_i,                    // exu模块写寄存器标志
+    input wire[31:0] exu_waddr_i,           // exu模块写寄存器地址
+    input wire[31:0] exu_wdata_i,           // exu模块写寄存器数据
+    input wire[31:0] exu_raddr_i,           // exu模块读寄存器地址
+    output wire[31:0] exu_rdata_o,          // exu模块读寄存器数据
+
+    input wire[31:0] pc_if_i,               // 取指地址
+    output wire trigger_match_o,            // 断点
+
+    // form exception
+    input wire excep_we_i,                  // exception模块写寄存器标志
+    input wire[31:0] excep_waddr_i,         // exception模块写寄存器地址
+    input wire[31:0] excep_wdata_i,         // exception模块写寄存器数据
+
+    output wire[31:0] mtvec_o,              // mtvec寄存器值
+    output wire[31:0] mepc_o,               // mepc寄存器值
+    output wire[31:0] mstatus_o,            // mstatus寄存器值
+    output wire[31:0] mie_o,                // mie寄存器值
+    output wire[31:0] dpc_o,                // dpc寄存器值
+    output wire[31:0] dcsr_o                // dcsr寄存器值
+
+    );
+
+    // 硬件断点个数(必须大于等于1)
+    localparam HwBpNum = 3;
+    localparam DbgHwNumLen = HwBpNum > 1 ? $clog2(HwBpNum) : 1;
+    localparam MaxTselect = HwBpNum - 1;
+
+    wire[31:0] max_tselect = MaxTselect;
+
+    wire[31:0] misa = 32'h40001100;   // 32bits, IM
+
+    // for verification result
+    reg[31:0] sstatus_d;
+    wire[31:0] sstatus_q;
+    reg sstatus_we;
+
+    reg[31:0] mtvec_d;
+    wire[31:0] mtvec_q;
+    reg mtvec_we;
+    reg[31:0] mcause_d;
+    wire[31:0] mcause_q;
+    reg mcause_we;
+    reg[31:0] mepc_d;
+    wire[31:0] mepc_q;
+    reg mepc_we;
+    reg[31:0] mie_d;
+    wire[31:0] mie_q;
+    reg mie_we;
+    reg[31:0] mstatus_d;
+    wire[31:0] mstatus_q;
+    reg mstatus_we;
+    reg[31:0] mscratch_d;
+    wire[31:0] mscratch_q;
+    reg mscratch_we;
+    reg[31:0] dscratch0_d;
+    wire[31:0] dscratch0_q;
+    reg dscratch0_we;
+    reg[31:0] dscratch1_d;
+    wire[31:0] dscratch1_q;
+    reg dscratch1_we;
+    reg[31:0] mhartid_d;
+    wire[31:0] mhartid_q;
+    reg mhartid_we;
+    reg[31:0] dpc_d;
+    wire[31:0] dpc_q;
+    reg dpc_we;
+    reg[31:0] dcsr_d;
+    wire[31:0] dcsr_q;
+    reg dcsr_we;
+
+    reg[31:0] tselect_d;
+    wire[31:0] tselect_q;
+    reg tselect_we;
+    wire              tmatch_control_d;
+    wire[HwBpNum-1:0] tmatch_control_q;
+    wire[HwBpNum-1:0] tmatch_control_we;
+    wire[31:0]        tmatch_value_d;
+    wire[31:0]        tmatch_value_q[HwBpNum];
+    wire[HwBpNum-1:0] tmatch_value_we;
+    wire[HwBpNum-1:0] trigger_match;
+    wire[31:0] tmatch_control_rdata;
+    wire[31:0] tmatch_value_rdata;
+    wire       selected_tmatch_control;
+    wire[31:0] selected_tmatch_value;
+
+    reg[63:0] cycle;
+
+    // cycle counter
+    // 复位撤销后就一直计数
+    always @ (posedge clk or negedge rst_n) begin
+        if (!rst_n) begin
+            cycle <= {32'h0, 32'h0};
+        end else begin
+            cycle <= cycle + 1'b1;
+        end
+    end
+
+    assign mtvec_o = mtvec_q;
+    assign mepc_o = mepc_q;
+    assign mstatus_o = mstatus_q;
+    assign mie_o = mie_q;
+    assign dpc_o = dpc_q;
+    assign dcsr_o = dcsr_q;
+
+    reg[31:0] exu_rdata;
+
+    // exu模块读CSR寄存器
+    always @ (*) begin
+        case (exu_raddr_i[11:0])
+            `CSR_CYCLE: begin
+                exu_rdata = cycle[31:0];
+            end
+            `CSR_CYCLEH: begin
+                exu_rdata = cycle[63:32];
+            end
+            `CSR_MTVEC: begin
+                exu_rdata = mtvec_q;
+            end
+            `CSR_MCAUSE: begin
+                exu_rdata = mcause_q;
+            end
+            `CSR_MEPC: begin
+                exu_rdata = mepc_q;
+            end
+            `CSR_MIE: begin
+                exu_rdata = mie_q;
+            end
+            `CSR_MSTATUS: begin
+                exu_rdata = mstatus_q;
+            end
+            `CSR_MSCRATCH: begin
+                exu_rdata = mscratch_q;
+            end
+            `CSR_DSCRATCH0: begin
+                exu_rdata = dscratch0_q;
+            end
+            `CSR_DSCRATCH1: begin
+                exu_rdata = dscratch1_q;
+            end
+            `CSR_MHARTID: begin
+                exu_rdata = mhartid_q;
+            end
+            `CSR_DPC: begin
+                exu_rdata = dpc_q;
+            end
+            `CSR_DCSR: begin
+                exu_rdata = dcsr_q;
+            end
+            `CSR_MISA: begin
+                exu_rdata = misa;
+            end
+            `CSR_TSELECT: begin
+                exu_rdata = tselect_q;
+            end
+            `CSR_TDATA1: begin
+                exu_rdata = tmatch_control_rdata;
+            end
+            `CSR_TDATA2: begin
+                exu_rdata = tmatch_value_rdata;
+            end
+            default: begin
+                exu_rdata = 32'h0;
+            end
+        endcase
+    end
+
+    assign exu_rdata_o = exu_rdata;
+
+    // 写CSR寄存器
+    wire we = exu_we_i | excep_we_i;
+    wire[31:0] waddr = exu_we_i? exu_waddr_i: excep_waddr_i;
+    wire[31:0] wdata = exu_we_i? exu_wdata_i: excep_wdata_i;
+
+    always @ (*) begin
+        mtvec_d = mtvec_q;
+        mtvec_we = 1'b0;
+        mcause_d = mcause_q;
+        mcause_we = 1'b0;
+        mepc_d = mepc_q;
+        mepc_we = 1'b0;
+        mie_d = mie_q;
+        mie_we = 1'b0;
+        mstatus_d = mstatus_q;
+        mstatus_we = 1'b0;
+        mscratch_d = mscratch_q;
+        mscratch_we = 1'b0;
+        dscratch0_d = dscratch0_q;
+        dscratch0_we = 1'b0;
+        dscratch1_d = dscratch1_q;
+        dscratch1_we = 1'b0;
+        mhartid_d = mhartid_q;
+        mhartid_we = 1'b0;
+        dpc_d = dpc_q;
+        dpc_we = 1'b0;
+        dcsr_d = dcsr_q;
+        dcsr_we = 1'b0;
+        sstatus_d = sstatus_q;
+        sstatus_we = 1'b0;
+
+        if (we) begin
+            case (waddr[11:0])
+                `CSR_MTVEC: begin
+                    mtvec_d = wdata;
+                    mtvec_we = 1'b1;
+                end
+                `CSR_MCAUSE: begin
+                    mcause_d = wdata;
+                    mcause_we = 1'b1;
+                end
+                `CSR_MEPC: begin
+                    mepc_d = wdata;
+                    mepc_we = 1'b1;
+                end
+                `CSR_MIE: begin
+                    mie_d = wdata;
+                    mie_we = 1'b1;
+                end
+                `CSR_MSTATUS: begin
+                    mstatus_d = wdata;
+                    mstatus_we = 1'b1;
+                end
+                `CSR_MSCRATCH: begin
+                    mscratch_d = wdata;
+                    mscratch_we = 1'b1;
+                end
+                `CSR_DSCRATCH0: begin
+                    dscratch0_d = wdata;
+                    dscratch0_we = 1'b1;
+                end
+                `CSR_DSCRATCH1: begin
+                    dscratch1_d = wdata;
+                    dscratch1_we = 1'b1;
+                end
+                `CSR_MHARTID: begin
+                    mhartid_d = wdata;
+                    mhartid_we = 1'b1;
+                end
+                `CSR_SSTATUS: begin
+                    sstatus_d = wdata;
+                    sstatus_we = 1'b1;
+                end
+                `CSR_DPC: begin
+                    dpc_d = wdata;
+                    dpc_we = 1'b1;
+                end
+                `CSR_DCSR: begin
+                    // Not all bits in DCSR are writable by exu
+                    if (exu_we_i) begin
+                        dcsr_d = {dcsr_q[31:28], wdata[27:9], dcsr_q[8:6], wdata[5:4], dcsr_q[3], wdata[2:0]};
+                    end else begin
+                        dcsr_d = wdata;
+                    end
+                    dcsr_we = 1'b1;
+                end
+                default:;
+            endcase
+        end
+    end
+
+    // trigger control
+    assign tselect_we = (exu_waddr_i[11:0] == `CSR_TSELECT) & exu_we_i;
+
+    for (genvar i = 0; i < HwBpNum; i = i + 1) begin : dbg_tmatch_we
+        assign tmatch_control_we[i] = (i == tselect_q) &
+                                      exu_we_i &
+                                      (exu_waddr_i[11:0] == `CSR_TDATA1);
+        assign tmatch_value_we[i]   = (i == tselect_q) &
+                                      exu_we_i &
+                                      (exu_waddr_i[11:0] == `CSR_TDATA2);
+    end
+
+    assign tselect_d  = (exu_wdata_i < HwBpNum) ? exu_wdata_i : max_tselect;
+    assign tmatch_control_d = exu_wdata_i[2];
+    assign tmatch_value_d   = exu_wdata_i;
+
+    if (HwBpNum > 1) begin : dbg_tmatch_multiple_select
+        assign selected_tmatch_control = tmatch_control_q[tselect_q];
+        assign selected_tmatch_value   = tmatch_value_q[tselect_q];
+    end else begin : dbg_tmatch_single_select
+        assign selected_tmatch_control = tmatch_control_q[0];
+        assign selected_tmatch_value   = tmatch_value_q[0];
+    end
+
+    // TDATA0 - only support simple address matching
+    assign tmatch_control_rdata = {4'h2,                    // type    : address/data match
+                                   1'b1,                    // dmode   : access from D mode only
+                                   6'h00,                   // maskmax : exact match only
+                                   1'b0,                    // hit     : not supported
+                                   1'b0,                    // select  : address match only
+                                   1'b0,                    // timing  : match before execution
+                                   2'b00,                   // sizelo  : match any access
+                                   4'h1,                    // action  : enter debug mode
+                                   1'b0,                    // chain   : not supported
+                                   4'h0,                    // match   : simple match
+                                   1'b1,                    // m       : match in m-mode
+                                   1'b0,                    // 0       : zero
+                                   1'b0,                    // s       : not supported
+                                   1'b1,                    // u       : match in u-mode
+                                   selected_tmatch_control, // execute : match instruction address
+                                   1'b0,                    // store   : not supported
+                                   1'b0};                   // load    : not supported
+
+    // TDATA1 - address match value only
+    assign tmatch_value_rdata = selected_tmatch_value;
+
+    // Breakpoint matching
+    // We match against the next address, as the breakpoint must be taken before execution
+    for (genvar i = 0; i < HwBpNum; i = i + 1) begin : dbg_trigger_match
+        assign trigger_match[i] = tmatch_control_q[i] & (pc_if_i == tmatch_value_q[i]);
+    end
+
+    assign trigger_match_o = |trigger_match;
+
+
+    // mtvec
+    csr #(
+        .RESET_VAL(32'h0)
+    ) mtvec_csr (
+        .clk(clk),
+        .rst_n(rst_n),
+        .wdata_i(mtvec_d),
+        .we_i(mtvec_we),
+        .rdata_o(mtvec_q)
+    );
+
+    // mcause
+    csr #(
+        .RESET_VAL(32'h0)
+    ) mcause_csr (
+        .clk(clk),
+        .rst_n(rst_n),
+        .wdata_i(mcause_d),
+        .we_i(mcause_we),
+        .rdata_o(mcause_q)
+    );
+
+    // mepc
+    csr #(
+        .RESET_VAL(32'h0)
+    ) mepc_csr (
+        .clk(clk),
+        .rst_n(rst_n),
+        .wdata_i(mepc_d),
+        .we_i(mepc_we),
+        .rdata_o(mepc_q)
+    );
+
+    // mie
+    csr #(
+        .RESET_VAL(32'h0)
+    ) mie_csr (
+        .clk(clk),
+        .rst_n(rst_n),
+        .wdata_i(mie_d),
+        .we_i(mie_we),
+        .rdata_o(mie_q)
+    );
+
+    // mstatus
+    csr #(
+        .RESET_VAL(32'h0)
+    ) mstatus_csr (
+        .clk(clk),
+        .rst_n(rst_n),
+        .wdata_i(mstatus_d),
+        .we_i(mstatus_we),
+        .rdata_o(mstatus_q)
+    );
+
+    // mscratch
+    csr #(
+        .RESET_VAL(32'h0)
+    ) mscratch_csr (
+        .clk(clk),
+        .rst_n(rst_n),
+        .wdata_i(mscratch_d),
+        .we_i(mscratch_we),
+        .rdata_o(mscratch_q)
+    );
+
+    // dscratch0
+    csr #(
+        .RESET_VAL(32'h0)
+    ) dscratch0_csr (
+        .clk(clk),
+        .rst_n(rst_n),
+        .wdata_i(dscratch0_d),
+        .we_i(dscratch0_we),
+        .rdata_o(dscratch0_q)
+    );
+
+    // dscratch1
+    csr #(
+        .RESET_VAL(32'h0)
+    ) dscratch1_csr (
+        .clk(clk),
+        .rst_n(rst_n),
+        .wdata_i(dscratch1_d),
+        .we_i(dscratch1_we),
+        .rdata_o(dscratch1_q)
+    );
+
+    // mhartid
+    csr #(
+        .RESET_VAL(32'h0)
+    ) mhartid_csr (
+        .clk(clk),
+        .rst_n(rst_n),
+        .wdata_i(mhartid_d),
+        .we_i(mhartid_we),
+        .rdata_o(mhartid_q)
+    );
+
+    // dpc
+    csr #(
+        .RESET_VAL(32'h0)
+    ) dpc_csr (
+        .clk(clk),
+        .rst_n(rst_n),
+        .wdata_i(dpc_d),
+        .we_i(dpc_we),
+        .rdata_o(dpc_q)
+    );
+
+    // dcsr
+    csr #(
+        .RESET_VAL(32'h40000000)
+    ) dcsr_csr (
+        .clk(clk),
+        .rst_n(rst_n),
+        .wdata_i(dcsr_d),
+        .we_i(dcsr_we),
+        .rdata_o(dcsr_q)
+    );
+
+    // tselect
+    csr #(
+        .RESET_VAL(32'h0)
+    ) tselect_csr (
+        .clk(clk),
+        .rst_n(rst_n),
+        .wdata_i(tselect_d),
+        .we_i(tselect_we),
+        .rdata_o(tselect_q)
+    );
+
+    // sstatus
+    csr #(
+        .RESET_VAL(32'h0)
+    ) sstatus_csr (
+        .clk(clk),
+        .rst_n(rst_n),
+        .wdata_i(sstatus_d),
+        .we_i(sstatus_we),
+        .rdata_o(sstatus_q)
+    );
+
+    for (genvar i = 0; i < HwBpNum; i = i + 1) begin : dbg_tmatch_reg
+        // tdata1
+        csr #(
+            .RESET_VAL(1'b0),
+            .WIDTH(1)
+        ) tmatch_control_csr (
+            .clk(clk),
+            .rst_n(rst_n),
+            .wdata_i(tmatch_control_d),
+            .we_i(tmatch_control_we[i]),
+            .rdata_o(tmatch_control_q[i])
+        );
+
+        // tdata2
+        csr #(
+            .RESET_VAL(32'h0)
+        ) tmatch_value_csr (
+            .clk(clk),
+            .rst_n(rst_n),
+            .wdata_i(tmatch_value_d),
+            .we_i(tmatch_value_we[i]),
+            .rdata_o(tmatch_value_q[i])
+        );
+    end
+
+    // for debug
+    wire[31:0] mtvec = mtvec_q;
+    wire[31:0] mstatus = mstatus_q;
+    wire[31:0] mepc = mepc_q;
+    wire[31:0] mie = mie_q;
+    wire[31:0] dpc = dpc_q;
+    wire[31:0] dcsr = dcsr_q;
+
+endmodule

rtl/core/csr_reg.v

@@ -1,215 +0,0 @@
- /*                                                                      
- Copyright 2020 Blue Liang, liangkangnan@163.com
-                                                                         
- Licensed under the Apache License, Version 2.0 (the "License");         
- you may not use this file except in compliance with the License.        
- You may obtain a copy of the License at                                 
-                                                                         
-     http://www.apache.org/licenses/LICENSE-2.0                          
-                                                                         
- Unless required by applicable law or agreed to in writing, software    
- distributed under the License is distributed on an "AS IS" BASIS,       
- WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- See the License for the specific language governing permissions and     
- limitations under the License.                                          
- */
-
-`include "defines.v"
-
-// CSR寄存器模块
-module csr_reg(
-
-    input wire clk,
-    input wire rst,
-
-    // form ex
-    input wire we_i,                        // ex模块写寄存器标志
-    input wire[`MemAddrBus] raddr_i,        // ex模块读寄存器地址
-    input wire[`MemAddrBus] waddr_i,        // ex模块写寄存器地址
-    input wire[`RegBus] data_i,             // ex模块写寄存器数据
-
-    // from clint
-    input wire clint_we_i,                  // clint模块写寄存器标志
-    input wire[`MemAddrBus] clint_raddr_i,  // clint模块读寄存器地址
-    input wire[`MemAddrBus] clint_waddr_i,  // clint模块写寄存器地址
-    input wire[`RegBus] clint_data_i,       // clint模块写寄存器数据
-
-    output wire global_int_en_o,            // 全局中断使能标志
-
-    // to clint
-    output reg[`RegBus] clint_data_o,       // clint模块读寄存器数据
-    output wire[`RegBus] clint_csr_mtvec,   // mtvec
-    output wire[`RegBus] clint_csr_mepc,    // mepc
-    output wire[`RegBus] clint_csr_mstatus, // mstatus
-
-    // to ex
-    output reg[`RegBus] data_o              // ex模块读寄存器数据
-
-    );
-
-    reg[`DoubleRegBus] cycle;
-    reg[`RegBus] mtvec;
-    reg[`RegBus] mcause;
-    reg[`RegBus] mepc;
-    reg[`RegBus] mie;
-    reg[`RegBus] mstatus;
-    reg[`RegBus] mscratch;
-
-    assign global_int_en_o = (mstatus[3] == 1'b1)? `True: `False;
-
-    assign clint_csr_mtvec = mtvec;
-    assign clint_csr_mepc = mepc;
-    assign clint_csr_mstatus = mstatus;
-
-    // cycle counter
-    // 复位撤销后就一直计数
-    always @ (posedge clk) begin
-        if (rst == `RstEnable) begin
-            cycle <= {`ZeroWord, `ZeroWord};
-        end else begin
-            cycle <= cycle + 1'b1;
-        end
-    end
-
-    // write reg
-    // 写寄存器操作
-    always @ (posedge clk) begin
-        if (rst == `RstEnable) begin
-            mtvec <= `ZeroWord;
-            mcause <= `ZeroWord;
-            mepc <= `ZeroWord;
-            mie <= `ZeroWord;
-            mstatus <= `ZeroWord;
-            mscratch <= `ZeroWord;
-        end else begin
-            // 优先响应ex模块的写操作
-            if (we_i == `WriteEnable) begin
-                case (waddr_i[11:0])
-                    `CSR_MTVEC: begin
-                        mtvec <= data_i;
-                    end
-                    `CSR_MCAUSE: begin
-                        mcause <= data_i;
-                    end
-                    `CSR_MEPC: begin
-                        mepc <= data_i;
-                    end
-                    `CSR_MIE: begin
-                        mie <= data_i;
-                    end
-                    `CSR_MSTATUS: begin
-                        mstatus <= data_i;
-                    end
-                    `CSR_MSCRATCH: begin
-                        mscratch <= data_i;
-                    end
-                    default: begin
-
-                    end
-                endcase
-            // clint模块写操作
-            end else if (clint_we_i == `WriteEnable) begin
-                case (clint_waddr_i[11:0])
-                    `CSR_MTVEC: begin
-                        mtvec <= clint_data_i;
-                    end
-                    `CSR_MCAUSE: begin
-                        mcause <= clint_data_i;
-                    end
-                    `CSR_MEPC: begin
-                        mepc <= clint_data_i;
-                    end
-                    `CSR_MIE: begin
-                        mie <= clint_data_i;
-                    end
-                    `CSR_MSTATUS: begin
-                        mstatus <= clint_data_i;
-                    end
-                    `CSR_MSCRATCH: begin
-                        mscratch <= clint_data_i;
-                    end
-                    default: begin
-
-                    end
-                endcase
-            end
-        end
-    end
-
-    // read reg
-    // ex模块读CSR寄存器
-    always @ (*) begin
-        if ((waddr_i[11:0] == raddr_i[11:0]) && (we_i == `WriteEnable)) begin
-            data_o = data_i;
-        end else begin
-            case (raddr_i[11:0])
-                `CSR_CYCLE: begin
-                    data_o = cycle[31:0];
-                end
-                `CSR_CYCLEH: begin
-                    data_o = cycle[63:32];
-                end
-                `CSR_MTVEC: begin
-                    data_o = mtvec;
-                end
-                `CSR_MCAUSE: begin
-                    data_o = mcause;
-                end
-                `CSR_MEPC: begin
-                    data_o = mepc;
-                end
-                `CSR_MIE: begin
-                    data_o = mie;
-                end
-                `CSR_MSTATUS: begin
-                    data_o = mstatus;
-                end
-                `CSR_MSCRATCH: begin
-                    data_o = mscratch;
-                end
-                default: begin
-                    data_o = `ZeroWord;
-                end
-            endcase
-        end
-    end
-
-    // read reg
-    // clint模块读CSR寄存器
-    always @ (*) begin
-        if ((clint_waddr_i[11:0] == clint_raddr_i[11:0]) && (clint_we_i == `WriteEnable)) begin
-            clint_data_o = clint_data_i;
-        end else begin
-            case (clint_raddr_i[11:0])
-                `CSR_CYCLE: begin
-                    clint_data_o = cycle[31:0];
-                end
-                `CSR_CYCLEH: begin
-                    clint_data_o = cycle[63:32];
-                end
-                `CSR_MTVEC: begin
-                    clint_data_o = mtvec;
-                end
-                `CSR_MCAUSE: begin
-                    clint_data_o = mcause;
-                end
-                `CSR_MEPC: begin
-                    clint_data_o = mepc;
-                end
-                `CSR_MIE: begin
-                    clint_data_o = mie;
-                end
-                `CSR_MSTATUS: begin
-                    clint_data_o = mstatus;
-                end
-                `CSR_MSCRATCH: begin
-                    clint_data_o = mscratch;
-                end
-                default: begin
-                    clint_data_o = `ZeroWord;
-                end
-            endcase
-        end
-    end
-
-endmodule

rtl/core/ctrl.v

@@ -1,68 +0,0 @@
- /*                                                                      
- Copyright 2019 Blue Liang, liangkangnan@163.com
-                                                                         
- Licensed under the Apache License, Version 2.0 (the "License");         
- you may not use this file except in compliance with the License.        
- You may obtain a copy of the License at                                 
-                                                                         
-     http://www.apache.org/licenses/LICENSE-2.0                          
-                                                                         
- Unless required by applicable law or agreed to in writing, software    
- distributed under the License is distributed on an "AS IS" BASIS,       
- WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- See the License for the specific language governing permissions and     
- limitations under the License.                                          
- */
-
-`include "defines.v"
-
-// 控制模块
-// 发出跳转、暂停流水线信号
-module ctrl(
-
-    input wire rst,
-
-    // from ex
-    input wire jump_flag_i,
-    input wire[`InstAddrBus] jump_addr_i,
-    input wire hold_flag_ex_i,
-
-    // from rib
-    input wire hold_flag_rib_i,
-
-    // from jtag
-    input wire jtag_halt_flag_i,
-
-    // from clint
-    input wire hold_flag_clint_i,
-
-    output reg[`Hold_Flag_Bus] hold_flag_o,
-
-    // to pc_reg
-    output reg jump_flag_o,
-    output reg[`InstAddrBus] jump_addr_o
-
-    );
-
-
-    always @ (*) begin
-        jump_addr_o = jump_addr_i;
-        jump_flag_o = jump_flag_i;
-        // 默认不暂停
-        hold_flag_o = `Hold_None;
-        // 按优先级处理不同模块的请求
-        if (jump_flag_i == `JumpEnable || hold_flag_ex_i == `HoldEnable || hold_flag_clint_i == `HoldEnable) begin
-            // 暂停整条流水线
-            hold_flag_o = `Hold_Id;
-        end else if (hold_flag_rib_i == `HoldEnable) begin
-            // 暂停PC，即取指地址不变
-            hold_flag_o = `Hold_Pc;
-        end else if (jtag_halt_flag_i == `HoldEnable) begin
-            // 暂停整条流水线
-            hold_flag_o = `Hold_Id;
-        end else begin
-            hold_flag_o = `Hold_None;
-        end
-    end
-
-endmodule

rtl/core/defines.sv

@@ -0,0 +1,196 @@
+ /*                                                                      
+ Copyright 2019 Blue Liang, liangkangnan@163.com
+                                                                         
+ Licensed under the Apache License, Version 2.0 (the "License");         
+ you may not use this file except in compliance with the License.        
+ You may obtain a copy of the License at                                 
+                                                                         
+     http://www.apache.org/licenses/LICENSE-2.0                          
+                                                                         
+ Unless required by applicable law or agreed to in writing, software    
+ distributed under the License is distributed on an "AS IS" BASIS,       
+ WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ See the License for the specific language governing permissions and     
+ limitations under the License.                                          
+ */
+
+// 从Flash启动时打开下面这个宏
+//`define FLASH_BOOT
+
+`ifdef FLASH_BOOT
+`define CPU_RESET_ADDR       32'h01000000                   // CPU复位地址
+`else
+`define CPU_RESET_ADDR       32'h00000000                   // CPU复位地址
+`endif
+`define CPU_CLOCK_HZ         25000000                       // CPU时钟(25MHZ)
+`define JTAG_RESET_FF_LEVELS 5
+
+`define ROM_DEPTH           (32 * 256)                     // 32KB，指令存储器深度，单位为word(4字节)
+`define RAM_DEPTH           (16 * 256)                     // 16KB，数据存储器深度，单位为word(4字节)
+
+// 外设地址、大小
+// ROM
+`define ROM_ADDR_MASK       ~32'hfffff
+`define ROM_ADDR_BASE       32'h00000000
+// Bootrom
+`define BOOTROM_ADDR_MASK   ~32'hffffff
+`define BOOTROM_ADDR_BASE   32'h01000000
+// Xip
+`define XIP_ADDR_MASK       ~32'hffffff
+`define XIP_ADDR_BASE       32'h02000000
+// DEBUG
+`define DEBUG_ADDR_MASK     ~32'hfffff
+`define DEBUG_ADDR_BASE     32'h10000000
+// RAM
+`define RAM_ADDR_MASK       ~32'hfffff
+`define RAM_ADDR_BASE       32'h20000000
+// GPIO
+`define GPIO_ADDR_MASK      ~32'hffff
+`define GPIO_ADDR_BASE      32'h03000000
+// Timer0
+`define TIMER0_ADDR_MASK    ~32'hffff
+`define TIMER0_ADDR_BASE    32'h04000000
+// UART0
+`define UART0_ADDR_MASK     ~32'hffff
+`define UART0_ADDR_BASE     32'h05000000
+// I2C0
+`define I2C0_ADDR_MASK      ~32'hffff
+`define I2C0_ADDR_BASE      32'h06000000
+// SPI0
+`define SPI0_ADDR_MASK      ~32'hffff
+`define SPI0_ADDR_BASE      32'h07000000
+// PINMUX
+`define PINMUX_ADDR_MASK    ~32'hffff
+`define PINMUX_ADDR_BASE    32'h08000000
+// UART1
+`define UART1_ADDR_MASK     ~32'hffff
+`define UART1_ADDR_BASE     32'h09000000
+// UART2
+`define UART2_ADDR_MASK     ~32'hffff
+`define UART2_ADDR_BASE     32'h0A000000
+// Timer1
+`define TIMER1_ADDR_MASK    ~32'hffff
+`define TIMER1_ADDR_BASE    32'h0C000000
+// Timer2
+`define TIMER2_ADDR_MASK    ~32'hffff
+`define TIMER2_ADDR_BASE    32'h0D000000
+// I2C1
+`define I2C1_ADDR_MASK      ~32'hffff
+`define I2C1_ADDR_BASE      32'h0B000000
+// Interrupt controller
+`define RVIC_ADDR_MASK      ~32'hffff
+`define RVIC_ADDR_BASE      32'hD0000000
+// SIM CTRL
+`define SIM_CTRL_ADDR_MASK  ~32'hffff
+`define SIM_CTRL_ADDR_BASE  32'hE0000000
+
+`define STALL_WIDTH         4
+`define STALL_PC            2'd0
+`define STALL_IF            2'd1
+`define STALL_ID            2'd2
+`define STALL_EX            2'd3
+
+`define INST_NOP            32'h00000013
+`define INST_MRET           32'h30200073
+`define INST_ECALL          32'h00000073
+`define INST_EBREAK         32'h00100073
+`define INST_DRET           32'h7b200073
+
+// 指令译码信息
+`define DECINFO_GRP_BUS           2:0
+`define DECINFO_GRP_WIDTH         3
+`define DECINFO_GRP_ALU           `DECINFO_GRP_WIDTH'd1
+`define DECINFO_GRP_BJP           `DECINFO_GRP_WIDTH'd2
+`define DECINFO_GRP_MULDIV        `DECINFO_GRP_WIDTH'd3
+`define DECINFO_GRP_CSR           `DECINFO_GRP_WIDTH'd4
+`define DECINFO_GRP_MEM           `DECINFO_GRP_WIDTH'd5
+`define DECINFO_GRP_SYS           `DECINFO_GRP_WIDTH'd6
+
+`define DECINFO_ALU_BUS_WIDTH     (`DECINFO_GRP_WIDTH+14)
+`define DECINFO_ALU_LUI           (`DECINFO_GRP_WIDTH+0)
+`define DECINFO_ALU_AUIPC         (`DECINFO_GRP_WIDTH+1)
+`define DECINFO_ALU_ADD           (`DECINFO_GRP_WIDTH+2)
+`define DECINFO_ALU_SUB           (`DECINFO_GRP_WIDTH+3)
+`define DECINFO_ALU_SLL           (`DECINFO_GRP_WIDTH+4)
+`define DECINFO_ALU_SLT           (`DECINFO_GRP_WIDTH+5)
+`define DECINFO_ALU_SLTU          (`DECINFO_GRP_WIDTH+6)
+`define DECINFO_ALU_XOR           (`DECINFO_GRP_WIDTH+7)
+`define DECINFO_ALU_SRL           (`DECINFO_GRP_WIDTH+8)
+`define DECINFO_ALU_SRA           (`DECINFO_GRP_WIDTH+9)
+`define DECINFO_ALU_OR            (`DECINFO_GRP_WIDTH+10)
+`define DECINFO_ALU_AND           (`DECINFO_GRP_WIDTH+11)
+`define DECINFO_ALU_OP2IMM        (`DECINFO_GRP_WIDTH+12)
+`define DECINFO_ALU_OP1PC         (`DECINFO_GRP_WIDTH+13)
+
+`define DECINFO_BJP_BUS_WIDTH     (`DECINFO_GRP_WIDTH+8)
+`define DECINFO_BJP_JUMP          (`DECINFO_GRP_WIDTH+0)
+`define DECINFO_BJP_BEQ           (`DECINFO_GRP_WIDTH+1)
+`define DECINFO_BJP_BNE           (`DECINFO_GRP_WIDTH+2)
+`define DECINFO_BJP_BLT           (`DECINFO_GRP_WIDTH+3)
+`define DECINFO_BJP_BGE           (`DECINFO_GRP_WIDTH+4)
+`define DECINFO_BJP_BLTU          (`DECINFO_GRP_WIDTH+5)
+`define DECINFO_BJP_BGEU          (`DECINFO_GRP_WIDTH+6)
+`define DECINFO_BJP_OP1RS1        (`DECINFO_GRP_WIDTH+7)
+
+`define DECINFO_MULDIV_BUS_WIDTH  (`DECINFO_GRP_WIDTH+8)
+`define DECINFO_MULDIV_MUL        (`DECINFO_GRP_WIDTH+0)
+`define DECINFO_MULDIV_MULH       (`DECINFO_GRP_WIDTH+1)
+`define DECINFO_MULDIV_MULHSU     (`DECINFO_GRP_WIDTH+2)
+`define DECINFO_MULDIV_MULHU      (`DECINFO_GRP_WIDTH+3)
+`define DECINFO_MULDIV_DIV        (`DECINFO_GRP_WIDTH+4)
+`define DECINFO_MULDIV_DIVU       (`DECINFO_GRP_WIDTH+5)
+`define DECINFO_MULDIV_REM        (`DECINFO_GRP_WIDTH+6)
+`define DECINFO_MULDIV_REMU       (`DECINFO_GRP_WIDTH+7)
+
+`define DECINFO_CSR_BUS_WIDTH     (`DECINFO_GRP_WIDTH+16)
+`define DECINFO_CSR_CSRRW         (`DECINFO_GRP_WIDTH+0)
+`define DECINFO_CSR_CSRRS         (`DECINFO_GRP_WIDTH+1)
+`define DECINFO_CSR_CSRRC         (`DECINFO_GRP_WIDTH+2)
+`define DECINFO_CSR_RS1IMM        (`DECINFO_GRP_WIDTH+3)
+`define DECINFO_CSR_CSRADDR       `DECINFO_GRP_WIDTH+4+12-1:`DECINFO_GRP_WIDTH+4
+
+`define DECINFO_MEM_BUS_WIDTH     (`DECINFO_GRP_WIDTH+8)
+`define DECINFO_MEM_LB            (`DECINFO_GRP_WIDTH+0)
+`define DECINFO_MEM_LH            (`DECINFO_GRP_WIDTH+1)
+`define DECINFO_MEM_LW            (`DECINFO_GRP_WIDTH+2)
+`define DECINFO_MEM_LBU           (`DECINFO_GRP_WIDTH+3)
+`define DECINFO_MEM_LHU           (`DECINFO_GRP_WIDTH+4)
+`define DECINFO_MEM_SB            (`DECINFO_GRP_WIDTH+5)
+`define DECINFO_MEM_SH            (`DECINFO_GRP_WIDTH+6)
+`define DECINFO_MEM_SW            (`DECINFO_GRP_WIDTH+7)
+
+`define DECINFO_SYS_BUS_WIDTH     (`DECINFO_GRP_WIDTH+6)
+`define DECINFO_SYS_ECALL         (`DECINFO_GRP_WIDTH+0)
+`define DECINFO_SYS_EBREAK        (`DECINFO_GRP_WIDTH+1)
+`define DECINFO_SYS_NOP           (`DECINFO_GRP_WIDTH+2)
+`define DECINFO_SYS_MRET          (`DECINFO_GRP_WIDTH+3)
+`define DECINFO_SYS_FENCE         (`DECINFO_GRP_WIDTH+4)
+`define DECINFO_SYS_DRET          (`DECINFO_GRP_WIDTH+5)
+
+// 最长的那组
+`define DECINFO_WIDTH             `DECINFO_CSR_BUS_WIDTH
+
+// CSR寄存器地址
+`define CSR_CYCLE       12'hc00
+`define CSR_CYCLEH      12'hc80
+`define CSR_MTVEC       12'h305
+`define CSR_MCAUSE      12'h342
+`define CSR_MEPC        12'h341
+`define CSR_MIE         12'h304
+`define CSR_MSTATUS     12'h300
+`define CSR_MSCRATCH    12'h340
+`define CSR_MHARTID     12'hF14
+`define CSR_MISA        12'h301
+// only used for verification
+`define CSR_SSTATUS     12'h100
+// Debug
+`define CSR_DCSR        12'h7b0
+`define CSR_DPC         12'h7b1
+`define CSR_DSCRATCH0   12'h7b2
+`define CSR_DSCRATCH1   12'h7b3
+`define CSR_TSELECT     12'h7A0
+`define CSR_TDATA1      12'h7A1
+`define CSR_TDATA2      12'h7A2
+`define CSR_TDATA3      12'h7A3
+`define CSR_MCONTEXT    12'h7A8
+`define CSR_SCONTEXT    12'h7AA

rtl/core/defines.v

@@ -1,164 +0,0 @@
- /*                                                                      
- Copyright 2019 Blue Liang, liangkangnan@163.com
-                                                                         
- Licensed under the Apache License, Version 2.0 (the "License");         
- you may not use this file except in compliance with the License.        
- You may obtain a copy of the License at                                 
-                                                                         
-     http://www.apache.org/licenses/LICENSE-2.0                          
-                                                                         
- Unless required by applicable law or agreed to in writing, software    
- distributed under the License is distributed on an "AS IS" BASIS,       
- WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- See the License for the specific language governing permissions and     
- limitations under the License.                                          
- */
-
-`define CpuResetAddr 32'h0
-
-`define RstEnable 1'b0
-`define RstDisable 1'b1
-`define ZeroWord 32'h0
-`define ZeroReg 5'h0
-`define WriteEnable 1'b1
-`define WriteDisable 1'b0
-`define ReadEnable 1'b1
-`define ReadDisable 1'b0
-`define True 1'b1
-`define False 1'b0
-`define ChipEnable 1'b1
-`define ChipDisable 1'b0
-`define JumpEnable 1'b1
-`define JumpDisable 1'b0
-`define DivResultNotReady 1'b0
-`define DivResultReady 1'b1
-`define DivStart 1'b1
-`define DivStop 1'b0
-`define HoldEnable 1'b1
-`define HoldDisable 1'b0
-`define Stop 1'b1
-`define NoStop 1'b0
-`define RIB_ACK 1'b1
-`define RIB_NACK 1'b0
-`define RIB_REQ 1'b1
-`define RIB_NREQ 1'b0
-`define INT_ASSERT 1'b1
-`define INT_DEASSERT 1'b0
-
-`define INT_BUS 7:0
-`define INT_NONE 8'h0
-`define INT_RET 8'hff
-`define INT_TIMER0 8'b00000001
-`define INT_TIMER0_ENTRY_ADDR 32'h4
-
-`define Hold_Flag_Bus   2:0
-`define Hold_None 3'b000
-`define Hold_Pc   3'b001
-`define Hold_If   3'b010
-`define Hold_Id   3'b011
-
-// I type inst
-`define INST_TYPE_I 7'b0010011
-`define INST_ADDI   3'b000
-`define INST_SLTI   3'b010
-`define INST_SLTIU  3'b011
-`define INST_XORI   3'b100
-`define INST_ORI    3'b110
-`define INST_ANDI   3'b111
-`define INST_SLLI   3'b001
-`define INST_SRI    3'b101
-
-// L type inst
-`define INST_TYPE_L 7'b0000011
-`define INST_LB     3'b000
-`define INST_LH     3'b001
-`define INST_LW     3'b010
-`define INST_LBU    3'b100
-`define INST_LHU    3'b101
-
-// S type inst
-`define INST_TYPE_S 7'b0100011
-`define INST_SB     3'b000
-`define INST_SH     3'b001
-`define INST_SW     3'b010
-
-// R and M type inst
-`define INST_TYPE_R_M 7'b0110011
-// R type inst
-`define INST_ADD_SUB 3'b000
-`define INST_SLL    3'b001
-`define INST_SLT    3'b010
-`define INST_SLTU   3'b011
-`define INST_XOR    3'b100
-`define INST_SR     3'b101
-`define INST_OR     3'b110
-`define INST_AND    3'b111
-// M type inst
-`define INST_MUL    3'b000
-`define INST_MULH   3'b001
-`define INST_MULHSU 3'b010
-`define INST_MULHU  3'b011
-`define INST_DIV    3'b100
-`define INST_DIVU   3'b101
-`define INST_REM    3'b110
-`define INST_REMU   3'b111
-
-// J type inst
-`define INST_JAL    7'b1101111
-`define INST_JALR   7'b1100111
-
-`define INST_LUI    7'b0110111
-`define INST_AUIPC  7'b0010111
-`define INST_NOP    32'h00000001
-`define INST_NOP_OP 7'b0000001
-`define INST_MRET   32'h30200073
-`define INST_RET    32'h00008067
-
-`define INST_FENCE  7'b0001111
-`define INST_ECALL  32'h73
-`define INST_EBREAK 32'h00100073
-
-// J type inst
-`define INST_TYPE_B 7'b1100011
-`define INST_BEQ    3'b000
-`define INST_BNE    3'b001
-`define INST_BLT    3'b100
-`define INST_BGE    3'b101
-`define INST_BLTU   3'b110
-`define INST_BGEU   3'b111
-
-// CSR inst
-`define INST_CSR    7'b1110011
-`define INST_CSRRW  3'b001
-`define INST_CSRRS  3'b010
-`define INST_CSRRC  3'b011
-`define INST_CSRRWI 3'b101
-`define INST_CSRRSI 3'b110
-`define INST_CSRRCI 3'b111
-
-// CSR reg addr
-`define CSR_CYCLE   12'hc00
-`define CSR_CYCLEH  12'hc80
-`define CSR_MTVEC   12'h305
-`define CSR_MCAUSE  12'h342
-`define CSR_MEPC    12'h341
-`define CSR_MIE     12'h304
-`define CSR_MSTATUS 12'h300
-`define CSR_MSCRATCH 12'h340
-
-`define RomNum 4096  // rom depth(how many words)
-
-`define MemNum 4096  // memory depth(how many words)
-`define MemBus 31:0
-`define MemAddrBus 31:0
-
-`define InstBus 31:0
-`define InstAddrBus 31:0
-
-// common regs
-`define RegAddrBus 4:0
-`define RegBus 31:0
-`define DoubleRegBus 63:0
-`define RegWidth 32
-`define RegNum 32        // reg num
-`define RegNumLog2 5

rtl/core/divider.sv

@@ -14,28 +14,23 @@
  limitations under the License.                                          
  */
 
-`include "defines.v"
+`include "defines.sv"
 
 // 除法模块
 // 试商法实现32位整数除法
 // 每次除法运算至少需要33个时钟周期才能完成
-module div(
+module divider(
 
     input wire clk,
-    input wire rst,
+    input wire rst_n,
 
-    // from ex
-    input wire[`RegBus] dividend_i,      // 被除数
-    input wire[`RegBus] divisor_i,       // 除数
+    input wire[31:0] dividend_i,        // 被除数
+    input wire[31:0] divisor_i,         // 除数
     input wire start_i,                 // 开始信号，运算期间这个信号需要一直保持有效
-    input wire[2:0] op_i,                // 具体是哪一条指令
-    input wire[`RegAddrBus] reg_waddr_i, // 运算结束后需要写的寄存器
+    input wire[3:0] op_i,               // 具体是哪一条指令
 
-    // to ex
-    output reg[`RegBus] result_o,        // 除法结果，高32位是余数，低32位是商
-    output reg ready_o,                  // 运算结束信号
-    output reg busy_o,                  // 正在运算信号
-    output reg[`RegAddrBus] reg_waddr_o  // 运算结束后需要写的寄存器
+    output reg[31:0] result_o,          // 除法结果
+    output reg ready_o                  // 运算结束信号
 
     );
 
@@ -45,20 +40,20 @@ module div(
     localparam STATE_CALC  = 4'b0100;
     localparam STATE_END   = 4'b1000;
 
-    reg[`RegBus] dividend_r;
-    reg[`RegBus] divisor_r;
-    reg[2:0] op_r;
+    reg[31:0] dividend_r;
+    reg[31:0] divisor_r;
+    reg[3:0] op_r;
     reg[3:0] state;
     reg[31:0] count;
-    reg[`RegBus] div_result;
-    reg[`RegBus] div_remain;
-    reg[`RegBus] minuend;
+    reg[31:0] div_result;
+    reg[31:0] div_remain;
+    reg[31:0] minuend;
     reg invert_result;
 
-    wire op_div = (op_r == `INST_DIV);
-    wire op_divu = (op_r == `INST_DIVU);
-    wire op_rem = (op_r == `INST_REM);
-    wire op_remu = (op_r == `INST_REMU);
+    wire op_div = op_r[3];
+    wire op_divu = op_r[2];
+    wire op_rem = op_r[1];
+    wire op_remu = op_r[0];
 
     wire[31:0] dividend_invert = (-dividend_r);
     wire[31:0] divisor_invert = (-divisor_r);
@@ -68,61 +63,53 @@ module div(
     wire[31:0] minuend_tmp = minuend_ge_divisor? minuend_sub_res[30:0]: minuend[30:0];
 
     // 状态机实现
-    always @ (posedge clk) begin
-        if (rst == `RstEnable) begin
+    always @ (posedge clk or negedge rst_n) begin
+        if (!rst_n) begin
             state <= STATE_IDLE;
-            ready_o <= `DivResultNotReady;
-            result_o <= `ZeroWord;
-            div_result <= `ZeroWord;
-            div_remain <= `ZeroWord;
+            ready_o <= 1'b0;
+            result_o <= 32'h0;
+            div_result <= 32'h0;
+            div_remain <= 32'h0;
             op_r <= 3'h0;
-            reg_waddr_o <= `ZeroWord;
-            dividend_r <= `ZeroWord;
-            divisor_r <= `ZeroWord;
-            minuend <= `ZeroWord;
+            dividend_r <= 32'h0;
+            divisor_r <= 32'h0;
+            minuend <= 32'h0;
             invert_result <= 1'b0;
-            busy_o <= `False;
-            count <= `ZeroWord;
+            count <= 32'h0;
         end else begin
             case (state)
                 STATE_IDLE: begin
-                    if (start_i == `DivStart) begin
+                    if (start_i) begin
                         op_r <= op_i;
                         dividend_r <= dividend_i;
                         divisor_r <= divisor_i;
-                        reg_waddr_o <= reg_waddr_i;
                         state <= STATE_START;
-                        busy_o <= `True;
                     end else begin
                         op_r <= 3'h0;
-                        reg_waddr_o <= `ZeroWord;
-                        dividend_r <= `ZeroWord;
-                        divisor_r <= `ZeroWord;
-                        ready_o <= `DivResultNotReady;
-                        result_o <= `ZeroWord;
-                        busy_o <= `False;
+                        dividend_r <= 32'h0;
+                        divisor_r <= 32'h0;
+                        ready_o <= 1'b0;
+                        result_o <= 32'h0;
                     end
                 end
 
                 STATE_START: begin
-                    if (start_i == `DivStart) begin
+                    if (start_i) begin
                         // 除数为0
-                        if (divisor_r == `ZeroWord) begin
+                        if (divisor_r == 32'h0) begin
                             if (op_div | op_divu) begin
                                 result_o <= 32'hffffffff;
                             end else begin
                                 result_o <= dividend_r;
                             end
-                            ready_o <= `DivResultReady;
+                            ready_o <= 1'b1;
                             state <= STATE_IDLE;
-                            busy_o <= `False;
                         // 除数不为0
                         end else begin
-                            busy_o <= `True;
                             count <= 32'h40000000;
                             state <= STATE_CALC;
-                            div_result <= `ZeroWord;
-                            div_remain <= `ZeroWord;
+                            div_result <= 32'h0;
+                            div_remain <= 32'h0;
 
                             // DIV和REM这两条指令是有符号数运算指令
                             if (op_div | op_rem) begin
@@ -151,14 +138,13 @@ module div(
                         end
                     end else begin
                         state <= STATE_IDLE;
-                        result_o <= `ZeroWord;
-                        ready_o <= `DivResultNotReady;
-                        busy_o <= `False;
+                        result_o <= 32'h0;
+                        ready_o <= 1'b0;
                     end
                 end
 
                 STATE_CALC: begin
-                    if (start_i == `DivStart) begin
+                    if (start_i) begin
                         dividend_r <= {dividend_r[30:0], 1'b0};
                         div_result <= div_result_tmp;
                         count <= {1'b0, count[31:1]};
@@ -174,17 +160,15 @@ module div(
                         end
                     end else begin
                         state <= STATE_IDLE;
-                        result_o <= `ZeroWord;
-                        ready_o <= `DivResultNotReady;
-                        busy_o <= `False;
+                        result_o <= 32'h0;
+                        ready_o <= 1'b0;
                     end
                 end
 
                 STATE_END: begin
-                    if (start_i == `DivStart) begin
-                        ready_o <= `DivResultReady;
+                    if (start_i) begin
+                        ready_o <= 1'b1;
                         state <= STATE_IDLE;
-                        busy_o <= `False;
                         if (op_div | op_divu) begin
                             if (invert_result) begin
                                 result_o <= (-div_result);
@@ -200,9 +184,8 @@ module div(
                         end
                     end else begin
                         state <= STATE_IDLE;
-                        result_o <= `ZeroWord;
-                        ready_o <= `DivResultNotReady;
-                        busy_o <= `False;
+                        result_o <= 32'h0;
+                        ready_o <= 1'b0;
                     end
                 end
 

rtl/core/ex.v

@@ -1,875 +0,0 @@
- /*                                                                      
- Copyright 2019 Blue Liang, liangkangnan@163.com
-                                                                         
- Licensed under the Apache License, Version 2.0 (the "License");         
- you may not use this file except in compliance with the License.        
- You may obtain a copy of the License at                                 
-                                                                         
-     http://www.apache.org/licenses/LICENSE-2.0                          
-                                                                         
- Unless required by applicable law or agreed to in writing, software    
- distributed under the License is distributed on an "AS IS" BASIS,       
- WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- See the License for the specific language governing permissions and     
- limitations under the License.                                          
- */
-
-`include "defines.v"
-
-// 执行模块
-// 纯组合逻辑电路
-module ex(
-
-    input wire rst,
-
-    // from id
-    input wire[`InstBus] inst_i,            // 指令内容
-    input wire[`InstAddrBus] inst_addr_i,   // 指令地址
-    input wire reg_we_i,                    // 是否写通用寄存器
-    input wire[`RegAddrBus] reg_waddr_i,    // 写通用寄存器地址
-    input wire[`RegBus] reg1_rdata_i,       // 通用寄存器1输入数据
-    input wire[`RegBus] reg2_rdata_i,       // 通用寄存器2输入数据
-    input wire csr_we_i,                    // 是否写CSR寄存器
-    input wire[`MemAddrBus] csr_waddr_i,    // 写CSR寄存器地址
-    input wire[`RegBus] csr_rdata_i,        // CSR寄存器输入数据
-    input wire int_assert_i,                // 中断发生标志
-    input wire[`InstAddrBus] int_addr_i,    // 中断跳转地址
-    input wire[`MemAddrBus] op1_i,
-    input wire[`MemAddrBus] op2_i,
-    input wire[`MemAddrBus] op1_jump_i,
-    input wire[`MemAddrBus] op2_jump_i,
-
-    // from mem
-    input wire[`MemBus] mem_rdata_i,        // 内存输入数据
-
-    // from div
-    input wire div_ready_i,                 // 除法运算完成标志
-    input wire[`RegBus] div_result_i,       // 除法运算结果
-    input wire div_busy_i,                  // 除法运算忙标志
-    input wire[`RegAddrBus] div_reg_waddr_i,// 除法运算结束后要写的寄存器地址
-
-    // to mem
-    output reg[`MemBus] mem_wdata_o,        // 写内存数据
-    output reg[`MemAddrBus] mem_raddr_o,    // 读内存地址
-    output reg[`MemAddrBus] mem_waddr_o,    // 写内存地址
-    output wire mem_we_o,                   // 是否要写内存
-    output wire mem_req_o,                  // 请求访问内存标志
-
-    // to regs
-    output wire[`RegBus] reg_wdata_o,       // 写寄存器数据
-    output wire reg_we_o,                   // 是否要写通用寄存器
-    output wire[`RegAddrBus] reg_waddr_o,   // 写通用寄存器地址
-
-    // to csr reg
-    output reg[`RegBus] csr_wdata_o,        // 写CSR寄存器数据
-    output wire csr_we_o,                   // 是否要写CSR寄存器
-    output wire[`MemAddrBus] csr_waddr_o,   // 写CSR寄存器地址
-
-    // to div
-    output wire div_start_o,                // 开始除法运算标志
-    output reg[`RegBus] div_dividend_o,     // 被除数
-    output reg[`RegBus] div_divisor_o,      // 除数
-    output reg[2:0] div_op_o,               // 具体是哪一条除法指令
-    output reg[`RegAddrBus] div_reg_waddr_o,// 除法运算结束后要写的寄存器地址
-
-    // to ctrl
-    output wire hold_flag_o,                // 是否暂停标志
-    output wire jump_flag_o,                // 是否跳转标志
-    output wire[`InstAddrBus] jump_addr_o   // 跳转目的地址
-
-    );
-
-    wire[1:0] mem_raddr_index;
-    wire[1:0] mem_waddr_index;
-    wire[`DoubleRegBus] mul_temp;
-    wire[`DoubleRegBus] mul_temp_invert;
-    wire[31:0] sr_shift;
-    wire[31:0] sri_shift;
-    wire[31:0] sr_shift_mask;
-    wire[31:0] sri_shift_mask;
-    wire[31:0] op1_add_op2_res;
-    wire[31:0] op1_jump_add_op2_jump_res;
-    wire[31:0] reg1_data_invert;
-    wire[31:0] reg2_data_invert;
-    wire op1_ge_op2_signed;
-    wire op1_ge_op2_unsigned;
-    wire op1_eq_op2;
-    reg[`RegBus] mul_op1;
-    reg[`RegBus] mul_op2;
-    wire[6:0] opcode;
-    wire[2:0] funct3;
-    wire[6:0] funct7;
-    wire[4:0] rd;
-    wire[4:0] uimm;
-    reg[`RegBus] reg_wdata;
-    reg reg_we;
-    reg[`RegAddrBus] reg_waddr;
-    reg[`RegBus] div_wdata;
-    reg div_we;
-    reg[`RegAddrBus] div_waddr;
-    reg div_hold_flag;
-    reg div_jump_flag;
-    reg[`InstAddrBus] div_jump_addr;
-    reg hold_flag;
-    reg jump_flag;
-    reg[`InstAddrBus] jump_addr;
-    reg mem_we;
-    reg mem_req;
-    reg div_start;
-
-    assign opcode = inst_i[6:0];
-    assign funct3 = inst_i[14:12];
-    assign funct7 = inst_i[31:25];
-    assign rd = inst_i[11:7];
-    assign uimm = inst_i[19:15];
-
-    assign sr_shift = reg1_rdata_i >> reg2_rdata_i[4:0];
-    assign sri_shift = reg1_rdata_i >> inst_i[24:20];
-    assign sr_shift_mask = 32'hffffffff >> reg2_rdata_i[4:0];
-    assign sri_shift_mask = 32'hffffffff >> inst_i[24:20];
-
-    assign op1_add_op2_res = op1_i + op2_i;
-    assign op1_jump_add_op2_jump_res = op1_jump_i + op2_jump_i;
-
-    assign reg1_data_invert = ~reg1_rdata_i + 1;
-    assign reg2_data_invert = ~reg2_rdata_i + 1;
-
-    // 有符号数比较
-    assign op1_ge_op2_signed = $signed(op1_i) >= $signed(op2_i);
-    // 无符号数比较
-    assign op1_ge_op2_unsigned = op1_i >= op2_i;
-    assign op1_eq_op2 = (op1_i == op2_i);
-
-    assign mul_temp = mul_op1 * mul_op2;
-    assign mul_temp_invert = ~mul_temp + 1;
-
-    assign mem_raddr_index = (reg1_rdata_i + {{20{inst_i[31]}}, inst_i[31:20]}) & 2'b11;
-    assign mem_waddr_index = (reg1_rdata_i + {{20{inst_i[31]}}, inst_i[31:25], inst_i[11:7]}) & 2'b11;
-
-    assign div_start_o = (int_assert_i == `INT_ASSERT)? `DivStop: div_start;
-
-    assign reg_wdata_o = reg_wdata | div_wdata;
-    // 响应中断时不写通用寄存器
-    assign reg_we_o = (int_assert_i == `INT_ASSERT)? `WriteDisable: (reg_we || div_we);
-    assign reg_waddr_o = reg_waddr | div_waddr;
-
-    // 响应中断时不写内存
-    assign mem_we_o = (int_assert_i == `INT_ASSERT)? `WriteDisable: mem_we;
-
-    // 响应中断时不向总线请求访问内存
-    assign mem_req_o = (int_assert_i == `INT_ASSERT)? `RIB_NREQ: mem_req;
-
-    assign hold_flag_o = hold_flag || div_hold_flag;
-    assign jump_flag_o = jump_flag || div_jump_flag || ((int_assert_i == `INT_ASSERT)? `JumpEnable: `JumpDisable);
-    assign jump_addr_o = (int_assert_i == `INT_ASSERT)? int_addr_i: (jump_addr | div_jump_addr);
-
-    // 响应中断时不写CSR寄存器
-    assign csr_we_o = (int_assert_i == `INT_ASSERT)? `WriteDisable: csr_we_i;
-    assign csr_waddr_o = csr_waddr_i;
-
-
-    // 处理乘法指令
-    always @ (*) begin
-        if ((opcode == `INST_TYPE_R_M) && (funct7 == 7'b0000001)) begin
-            case (funct3)
-                `INST_MUL, `INST_MULHU: begin
-                    mul_op1 = reg1_rdata_i;
-                    mul_op2 = reg2_rdata_i;
-                end
-                `INST_MULHSU: begin
-                    mul_op1 = (reg1_rdata_i[31] == 1'b1)? (reg1_data_invert): reg1_rdata_i;
-                    mul_op2 = reg2_rdata_i;
-                end
-                `INST_MULH: begin
-                    mul_op1 = (reg1_rdata_i[31] == 1'b1)? (reg1_data_invert): reg1_rdata_i;
-                    mul_op2 = (reg2_rdata_i[31] == 1'b1)? (reg2_data_invert): reg2_rdata_i;
-                end
-                default: begin
-                    mul_op1 = reg1_rdata_i;
-                    mul_op2 = reg2_rdata_i;
-                end
-            endcase
-        end else begin
-            mul_op1 = reg1_rdata_i;
-            mul_op2 = reg2_rdata_i;
-        end
-    end
-
-    // 处理除法指令
-    always @ (*) begin
-        div_dividend_o = reg1_rdata_i;
-        div_divisor_o = reg2_rdata_i;
-        div_op_o = funct3;
-        div_reg_waddr_o = reg_waddr_i;
-        if ((opcode == `INST_TYPE_R_M) && (funct7 == 7'b0000001)) begin
-            div_we = `WriteDisable;
-            div_wdata = `ZeroWord;
-            div_waddr = `ZeroWord;
-            case (funct3)
-                `INST_DIV, `INST_DIVU, `INST_REM, `INST_REMU: begin
-                    div_start = `DivStart;
-                    div_jump_flag = `JumpEnable;
-                    div_hold_flag = `HoldEnable;
-                    div_jump_addr = op1_jump_add_op2_jump_res;
-                end
-                default: begin
-                    div_start = `DivStop;
-                    div_jump_flag = `JumpDisable;
-                    div_hold_flag = `HoldDisable;
-                    div_jump_addr = `ZeroWord;
-                end
-            endcase
-        end else begin
-            div_jump_flag = `JumpDisable;
-            div_jump_addr = `ZeroWord;
-            if (div_busy_i == `True) begin
-                div_start = `DivStart;
-                div_we = `WriteDisable;
-                div_wdata = `ZeroWord;
-                div_waddr = `ZeroWord;
-                div_hold_flag = `HoldEnable;
-            end else begin
-                div_start = `DivStop;
-                div_hold_flag = `HoldDisable;
-                if (div_ready_i == `DivResultReady) begin
-                    div_wdata = div_result_i;
-                    div_waddr = div_reg_waddr_i;
-                    div_we = `WriteEnable;
-                end else begin
-                    div_we = `WriteDisable;
-                    div_wdata = `ZeroWord;
-                    div_waddr = `ZeroWord;
-                end
-            end
-        end
-    end
-
-    // 执行
-    always @ (*) begin
-        reg_we = reg_we_i;
-        reg_waddr = reg_waddr_i;
-        mem_req = `RIB_NREQ;
-        csr_wdata_o = `ZeroWord;
-
-        case (opcode)
-            `INST_TYPE_I: begin
-                case (funct3)
-                    `INST_ADDI: begin
-                        jump_flag = `JumpDisable;
-                        hold_flag = `HoldDisable;
-                        jump_addr = `ZeroWord;
-                        mem_wdata_o = `ZeroWord;
-                        mem_raddr_o = `ZeroWord;
-                        mem_waddr_o = `ZeroWord;
-                        mem_we = `WriteDisable;
-                        reg_wdata = op1_add_op2_res;
-                    end
-                    `INST_SLTI: begin
-                        jump_flag = `JumpDisable;
-                        hold_flag = `HoldDisable;
-                        jump_addr = `ZeroWord;
-                        mem_wdata_o = `ZeroWord;
-                        mem_raddr_o = `ZeroWord;
-                        mem_waddr_o = `ZeroWord;
-                        mem_we = `WriteDisable;
-                        reg_wdata = {32{(~op1_ge_op2_signed)}} & 32'h1;
-                    end
-                    `INST_SLTIU: begin
-                        jump_flag = `JumpDisable;
-                        hold_flag = `HoldDisable;
-                        jump_addr = `ZeroWord;
-                        mem_wdata_o = `ZeroWord;
-                        mem_raddr_o = `ZeroWord;
-                        mem_waddr_o = `ZeroWord;
-                        mem_we = `WriteDisable;
-                        reg_wdata = {32{(~op1_ge_op2_unsigned)}} & 32'h1;
-                    end
-                    `INST_XORI: begin
-                        jump_flag = `JumpDisable;
-                        hold_flag = `HoldDisable;
-                        jump_addr = `ZeroWord;
-                        mem_wdata_o = `ZeroWord;
-                        mem_raddr_o = `ZeroWord;
-                        mem_waddr_o = `ZeroWord;
-                        mem_we = `WriteDisable;
-                        reg_wdata = op1_i ^ op2_i;
-                    end
-                    `INST_ORI: begin
-                        jump_flag = `JumpDisable;
-                        hold_flag = `HoldDisable;
-                        jump_addr = `ZeroWord;
-                        mem_wdata_o = `ZeroWord;
-                        mem_raddr_o = `ZeroWord;
-                        mem_waddr_o = `ZeroWord;
-                        mem_we = `WriteDisable;
-                        reg_wdata = op1_i | op2_i;
-                    end
-                    `INST_ANDI: begin
-                        jump_flag = `JumpDisable;
-                        hold_flag = `HoldDisable;
-                        jump_addr = `ZeroWord;
-                        mem_wdata_o = `ZeroWord;
-                        mem_raddr_o = `ZeroWord;
-                        mem_waddr_o = `ZeroWord;
-                        mem_we = `WriteDisable;
-                        reg_wdata = op1_i & op2_i;
-                    end
-                    `INST_SLLI: begin
-                        jump_flag = `JumpDisable;
-                        hold_flag = `HoldDisable;
-                        jump_addr = `ZeroWord;
-                        mem_wdata_o = `ZeroWord;
-                        mem_raddr_o = `ZeroWord;
-                        mem_waddr_o = `ZeroWord;
-                        mem_we = `WriteDisable;
-                        reg_wdata = reg1_rdata_i << inst_i[24:20];
-                    end
-                    `INST_SRI: begin
-                        jump_flag = `JumpDisable;
-                        hold_flag = `HoldDisable;
-                        jump_addr = `ZeroWord;
-                        mem_wdata_o = `ZeroWord;
-                        mem_raddr_o = `ZeroWord;
-                        mem_waddr_o = `ZeroWord;
-                        mem_we = `WriteDisable;
-                        if (inst_i[30] == 1'b1) begin
-                            reg_wdata = (sri_shift & sri_shift_mask) | ({32{reg1_rdata_i[31]}} & (~sri_shift_mask));
-                        end else begin
-                            reg_wdata = reg1_rdata_i >> inst_i[24:20];
-                        end
-                    end
-                    default: begin
-                        jump_flag = `JumpDisable;
-                        hold_flag = `HoldDisable;
-                        jump_addr = `ZeroWord;
-                        mem_wdata_o = `ZeroWord;
-                        mem_raddr_o = `ZeroWord;
-                        mem_waddr_o = `ZeroWord;
-                        mem_we = `WriteDisable;
-                        reg_wdata = `ZeroWord;
-                    end
-                endcase
-            end
-            `INST_TYPE_R_M: begin
-                if ((funct7 == 7'b0000000) || (funct7 == 7'b0100000)) begin
-                    case (funct3)
-                        `INST_ADD_SUB: begin
-                            jump_flag = `JumpDisable;
-                            hold_flag = `HoldDisable;
-                            jump_addr = `ZeroWord;
-                            mem_wdata_o = `ZeroWord;
-                            mem_raddr_o = `ZeroWord;
-                            mem_waddr_o = `ZeroWord;
-                            mem_we = `WriteDisable;
-                            if (inst_i[30] == 1'b0) begin
-                                reg_wdata = op1_add_op2_res;
-                            end else begin
-                                reg_wdata = op1_i - op2_i;
-                            end
-                        end
-                        `INST_SLL: begin
-                            jump_flag = `JumpDisable;
-                            hold_flag = `HoldDisable;
-                            jump_addr = `ZeroWord;
-                            mem_wdata_o = `ZeroWord;
-                            mem_raddr_o = `ZeroWord;
-                            mem_waddr_o = `ZeroWord;
-                            mem_we = `WriteDisable;
-                            reg_wdata = op1_i << op2_i[4:0];
-                        end
-                        `INST_SLT: begin
-                            jump_flag = `JumpDisable;
-                            hold_flag = `HoldDisable;
-                            jump_addr = `ZeroWord;
-                            mem_wdata_o = `ZeroWord;
-                            mem_raddr_o = `ZeroWord;
-                            mem_waddr_o = `ZeroWord;
-                            mem_we = `WriteDisable;
-                            reg_wdata = {32{(~op1_ge_op2_signed)}} & 32'h1;
-                        end
-                        `INST_SLTU: begin
-                            jump_flag = `JumpDisable;
-                            hold_flag = `HoldDisable;
-                            jump_addr = `ZeroWord;
-                            mem_wdata_o = `ZeroWord;
-                            mem_raddr_o = `ZeroWord;
-                            mem_waddr_o = `ZeroWord;
-                            mem_we = `WriteDisable;
-                            reg_wdata = {32{(~op1_ge_op2_unsigned)}} & 32'h1;
-                        end
-                        `INST_XOR: begin
-                            jump_flag = `JumpDisable;
-                            hold_flag = `HoldDisable;
-                            jump_addr = `ZeroWord;
-                            mem_wdata_o = `ZeroWord;
-                            mem_raddr_o = `ZeroWord;
-                            mem_waddr_o = `ZeroWord;
-                            mem_we = `WriteDisable;
-                            reg_wdata = op1_i ^ op2_i;
-                        end
-                        `INST_SR: begin
-                            jump_flag = `JumpDisable;
-                            hold_flag = `HoldDisable;
-                            jump_addr = `ZeroWord;
-                            mem_wdata_o = `ZeroWord;
-                            mem_raddr_o = `ZeroWord;
-                            mem_waddr_o = `ZeroWord;
-                            mem_we = `WriteDisable;
-                            if (inst_i[30] == 1'b1) begin
-                                reg_wdata = (sr_shift & sr_shift_mask) | ({32{reg1_rdata_i[31]}} & (~sr_shift_mask));
-                            end else begin
-                                reg_wdata = reg1_rdata_i >> reg2_rdata_i[4:0];
-                            end
-                        end
-                        `INST_OR: begin
-                            jump_flag = `JumpDisable;
-                            hold_flag = `HoldDisable;
-                            jump_addr = `ZeroWord;
-                            mem_wdata_o = `ZeroWord;
-                            mem_raddr_o = `ZeroWord;
-                            mem_waddr_o = `ZeroWord;
-                            mem_we = `WriteDisable;
-                            reg_wdata = op1_i | op2_i;
-                        end
-                        `INST_AND: begin
-                            jump_flag = `JumpDisable;
-                            hold_flag = `HoldDisable;
-                            jump_addr = `ZeroWord;
-                            mem_wdata_o = `ZeroWord;
-                            mem_raddr_o = `ZeroWord;
-                            mem_waddr_o = `ZeroWord;
-                            mem_we = `WriteDisable;
-                            reg_wdata = op1_i & op2_i;
-                        end
-                        default: begin
-                            jump_flag = `JumpDisable;
-                            hold_flag = `HoldDisable;
-                            jump_addr = `ZeroWord;
-                            mem_wdata_o = `ZeroWord;
-                            mem_raddr_o = `ZeroWord;
-                            mem_waddr_o = `ZeroWord;
-                            mem_we = `WriteDisable;
-                            reg_wdata = `ZeroWord;
-                        end
-                    endcase
-                end else if (funct7 == 7'b0000001) begin
-                    case (funct3)
-                        `INST_MUL: begin
-                            jump_flag = `JumpDisable;
-                            hold_flag = `HoldDisable;
-                            jump_addr = `ZeroWord;
-                            mem_wdata_o = `ZeroWord;
-                            mem_raddr_o = `ZeroWord;
-                            mem_waddr_o = `ZeroWord;
-                            mem_we = `WriteDisable;
-                            reg_wdata = mul_temp[31:0];
-                        end
-                        `INST_MULHU: begin
-                            jump_flag = `JumpDisable;
-                            hold_flag = `HoldDisable;
-                            jump_addr = `ZeroWord;
-                            mem_wdata_o = `ZeroWord;
-                            mem_raddr_o = `ZeroWord;
-                            mem_waddr_o = `ZeroWord;
-                            mem_we = `WriteDisable;
-                            reg_wdata = mul_temp[63:32];
-                        end
-                        `INST_MULH: begin
-                            jump_flag = `JumpDisable;
-                            hold_flag = `HoldDisable;
-                            jump_addr = `ZeroWord;
-                            mem_wdata_o = `ZeroWord;
-                            mem_raddr_o = `ZeroWord;
-                            mem_waddr_o = `ZeroWord;
-                            mem_we = `WriteDisable;
-                            case ({reg1_rdata_i[31], reg2_rdata_i[31]})
-                                2'b00: begin
-                                    reg_wdata = mul_temp[63:32];
-                                end
-                                2'b11: begin
-                                    reg_wdata = mul_temp[63:32];
-                                end
-                                2'b10: begin
-                                    reg_wdata = mul_temp_invert[63:32];
-                                end
-                                default: begin
-                                    reg_wdata = mul_temp_invert[63:32];
-                                end
-                            endcase
-                        end
-                        `INST_MULHSU: begin
-                            jump_flag = `JumpDisable;
-                            hold_flag = `HoldDisable;
-                            jump_addr = `ZeroWord;
-                            mem_wdata_o = `ZeroWord;
-                            mem_raddr_o = `ZeroWord;
-                            mem_waddr_o = `ZeroWord;
-                            mem_we = `WriteDisable;
-                            if (reg1_rdata_i[31] == 1'b1) begin
-                                reg_wdata = mul_temp_invert[63:32];
-                            end else begin
-                                reg_wdata = mul_temp[63:32];
-                            end
-                        end
-                        default: begin
-                            jump_flag = `JumpDisable;
-                            hold_flag = `HoldDisable;
-                            jump_addr = `ZeroWord;
-                            mem_wdata_o = `ZeroWord;
-                            mem_raddr_o = `ZeroWord;
-                            mem_waddr_o = `ZeroWord;
-                            mem_we = `WriteDisable;
-                            reg_wdata = `ZeroWord;
-                        end
-                    endcase
-                end else begin
-                    jump_flag = `JumpDisable;
-                    hold_flag = `HoldDisable;
-                    jump_addr = `ZeroWord;
-                    mem_wdata_o = `ZeroWord;
-                    mem_raddr_o = `ZeroWord;
-                    mem_waddr_o = `ZeroWord;
-                    mem_we = `WriteDisable;
-                    reg_wdata = `ZeroWord;
-                end
-            end
-            `INST_TYPE_L: begin
-                case (funct3)
-                    `INST_LB: begin
-                        jump_flag = `JumpDisable;
-                        hold_flag = `HoldDisable;
-                        jump_addr = `ZeroWord;
-                        mem_wdata_o = `ZeroWord;
-                        mem_waddr_o = `ZeroWord;
-                        mem_we = `WriteDisable;
-                        mem_req = `RIB_REQ;
-                        mem_raddr_o = op1_add_op2_res;
-                        case (mem_raddr_index)
-                            2'b00: begin
-                                reg_wdata = {{24{mem_rdata_i[7]}}, mem_rdata_i[7:0]};
-                            end
-                            2'b01: begin
-                                reg_wdata = {{24{mem_rdata_i[15]}}, mem_rdata_i[15:8]};
-                            end
-                            2'b10: begin
-                                reg_wdata = {{24{mem_rdata_i[23]}}, mem_rdata_i[23:16]};
-                            end
-                            default: begin
-                                reg_wdata = {{24{mem_rdata_i[31]}}, mem_rdata_i[31:24]};
-                            end
-                        endcase
-                    end
-                    `INST_LH: begin
-                        jump_flag = `JumpDisable;
-                        hold_flag = `HoldDisable;
-                        jump_addr = `ZeroWord;
-                        mem_wdata_o = `ZeroWord;
-                        mem_waddr_o = `ZeroWord;
-                        mem_we = `WriteDisable;
-                        mem_req = `RIB_REQ;
-                        mem_raddr_o = op1_add_op2_res;
-                        if (mem_raddr_index == 2'b0) begin
-                            reg_wdata = {{16{mem_rdata_i[15]}}, mem_rdata_i[15:0]};
-                        end else begin
-                            reg_wdata = {{16{mem_rdata_i[31]}}, mem_rdata_i[31:16]};
-                        end
-                    end
-                    `INST_LW: begin
-                        jump_flag = `JumpDisable;
-                        hold_flag = `HoldDisable;
-                        jump_addr = `ZeroWord;
-                        mem_wdata_o = `ZeroWord;
-                        mem_waddr_o = `ZeroWord;
-                        mem_we = `WriteDisable;
-                        mem_req = `RIB_REQ;
-                        mem_raddr_o = op1_add_op2_res;
-                        reg_wdata = mem_rdata_i;
-                    end
-                    `INST_LBU: begin
-                        jump_flag = `JumpDisable;
-                        hold_flag = `HoldDisable;
-                        jump_addr = `ZeroWord;
-                        mem_wdata_o = `ZeroWord;
-                        mem_waddr_o = `ZeroWord;
-                        mem_we = `WriteDisable;
-                        mem_req = `RIB_REQ;
-                        mem_raddr_o = op1_add_op2_res;
-                        case (mem_raddr_index)
-                            2'b00: begin
-                                reg_wdata = {24'h0, mem_rdata_i[7:0]};
-                            end
-                            2'b01: begin
-                                reg_wdata = {24'h0, mem_rdata_i[15:8]};
-                            end
-                            2'b10: begin
-                                reg_wdata = {24'h0, mem_rdata_i[23:16]};
-                            end
-                            default: begin
-                                reg_wdata = {24'h0, mem_rdata_i[31:24]};
-                            end
-                        endcase
-                    end
-                    `INST_LHU: begin
-                        jump_flag = `JumpDisable;
-                        hold_flag = `HoldDisable;
-                        jump_addr = `ZeroWord;
-                        mem_wdata_o = `ZeroWord;
-                        mem_waddr_o = `ZeroWord;
-                        mem_we = `WriteDisable;
-                        mem_req = `RIB_REQ;
-                        mem_raddr_o = op1_add_op2_res;
-                        if (mem_raddr_index == 2'b0) begin
-                            reg_wdata = {16'h0, mem_rdata_i[15:0]};
-                        end else begin
-                            reg_wdata = {16'h0, mem_rdata_i[31:16]};
-                        end
-                    end
-                    default: begin
-                        jump_flag = `JumpDisable;
-                        hold_flag = `HoldDisable;
-                        jump_addr = `ZeroWord;
-                        mem_wdata_o = `ZeroWord;
-                        mem_raddr_o = `ZeroWord;
-                        mem_waddr_o = `ZeroWord;
-                        mem_we = `WriteDisable;
-                        reg_wdata = `ZeroWord;
-                    end
-                endcase
-            end
-            `INST_TYPE_S: begin
-                case (funct3)
-                    `INST_SB: begin
-                        jump_flag = `JumpDisable;
-                        hold_flag = `HoldDisable;
-                        jump_addr = `ZeroWord;
-                        reg_wdata = `ZeroWord;
-                        mem_we = `WriteEnable;
-                        mem_req = `RIB_REQ;
-                        mem_waddr_o = op1_add_op2_res;
-                        mem_raddr_o = op1_add_op2_res;
-                        case (mem_waddr_index)
-                            2'b00: begin
-                                mem_wdata_o = {mem_rdata_i[31:8], reg2_rdata_i[7:0]};
-                            end
-                            2'b01: begin
-                                mem_wdata_o = {mem_rdata_i[31:16], reg2_rdata_i[7:0], mem_rdata_i[7:0]};
-                            end
-                            2'b10: begin
-                                mem_wdata_o = {mem_rdata_i[31:24], reg2_rdata_i[7:0], mem_rdata_i[15:0]};
-                            end
-                            default: begin
-                                mem_wdata_o = {reg2_rdata_i[7:0], mem_rdata_i[23:0]};
-                            end
-                        endcase
-                    end
-                    `INST_SH: begin
-                        jump_flag = `JumpDisable;
-                        hold_flag = `HoldDisable;
-                        jump_addr = `ZeroWord;
-                        reg_wdata = `ZeroWord;
-                        mem_we = `WriteEnable;
-                        mem_req = `RIB_REQ;
-                        mem_waddr_o = op1_add_op2_res;
-                        mem_raddr_o = op1_add_op2_res;
-                        if (mem_waddr_index == 2'b00) begin
-                            mem_wdata_o = {mem_rdata_i[31:16], reg2_rdata_i[15:0]};
-                        end else begin
-                            mem_wdata_o = {reg2_rdata_i[15:0], mem_rdata_i[15:0]};
-                        end
-                    end
-                    `INST_SW: begin
-                        jump_flag = `JumpDisable;
-                        hold_flag = `HoldDisable;
-                        jump_addr = `ZeroWord;
-                        reg_wdata = `ZeroWord;
-                        mem_we = `WriteEnable;
-                        mem_req = `RIB_REQ;
-                        mem_waddr_o = op1_add_op2_res;
-                        mem_raddr_o = op1_add_op2_res;
-                        mem_wdata_o = reg2_rdata_i;
-                    end
-                    default: begin
-                        jump_flag = `JumpDisable;
-                        hold_flag = `HoldDisable;
-                        jump_addr = `ZeroWord;
-                        mem_wdata_o = `ZeroWord;
-                        mem_raddr_o = `ZeroWord;
-                        mem_waddr_o = `ZeroWord;
-                        mem_we = `WriteDisable;
-                        reg_wdata = `ZeroWord;
-                    end
-                endcase
-            end
-            `INST_TYPE_B: begin
-                case (funct3)
-                    `INST_BEQ: begin
-                        hold_flag = `HoldDisable;
-                        mem_wdata_o = `ZeroWord;
-                        mem_raddr_o = `ZeroWord;
-                        mem_waddr_o = `ZeroWord;
-                        mem_we = `WriteDisable;
-                        reg_wdata = `ZeroWord;
-                        jump_flag = op1_eq_op2 & `JumpEnable;
-                        jump_addr = {32{op1_eq_op2}} & op1_jump_add_op2_jump_res;
-                    end
-                    `INST_BNE: begin
-                        hold_flag = `HoldDisable;
-                        mem_wdata_o = `ZeroWord;
-                        mem_raddr_o = `ZeroWord;
-                        mem_waddr_o = `ZeroWord;
-                        mem_we = `WriteDisable;
-                        reg_wdata = `ZeroWord;
-                        jump_flag = (~op1_eq_op2) & `JumpEnable;
-                        jump_addr = {32{(~op1_eq_op2)}} & op1_jump_add_op2_jump_res;
-                    end
-                    `INST_BLT: begin
-                        hold_flag = `HoldDisable;
-                        mem_wdata_o = `ZeroWord;
-                        mem_raddr_o = `ZeroWord;
-                        mem_waddr_o = `ZeroWord;
-                        mem_we = `WriteDisable;
-                        reg_wdata = `ZeroWord;
-                        jump_flag = (~op1_ge_op2_signed) & `JumpEnable;
-                        jump_addr = {32{(~op1_ge_op2_signed)}} & op1_jump_add_op2_jump_res;
-                    end
-                    `INST_BGE: begin
-                        hold_flag = `HoldDisable;
-                        mem_wdata_o = `ZeroWord;
-                        mem_raddr_o = `ZeroWord;
-                        mem_waddr_o = `ZeroWord;
-                        mem_we = `WriteDisable;
-                        reg_wdata = `ZeroWord;
-                        jump_flag = (op1_ge_op2_signed) & `JumpEnable;
-                        jump_addr = {32{(op1_ge_op2_signed)}} & op1_jump_add_op2_jump_res;
-                    end
-                    `INST_BLTU: begin
-                        hold_flag = `HoldDisable;
-                        mem_wdata_o = `ZeroWord;
-                        mem_raddr_o = `ZeroWord;
-                        mem_waddr_o = `ZeroWord;
-                        mem_we = `WriteDisable;
-                        reg_wdata = `ZeroWord;
-                        jump_flag = (~op1_ge_op2_unsigned) & `JumpEnable;
-                        jump_addr = {32{(~op1_ge_op2_unsigned)}} & op1_jump_add_op2_jump_res;
-                    end
-                    `INST_BGEU: begin
-                        hold_flag = `HoldDisable;
-                        mem_wdata_o = `ZeroWord;
-                        mem_raddr_o = `ZeroWord;
-                        mem_waddr_o = `ZeroWord;
-                        mem_we = `WriteDisable;
-                        reg_wdata = `ZeroWord;
-                        jump_flag = (op1_ge_op2_unsigned) & `JumpEnable;
-                        jump_addr = {32{(op1_ge_op2_unsigned)}} & op1_jump_add_op2_jump_res;
-                    end
-                    default: begin
-                        jump_flag = `JumpDisable;
-                        hold_flag = `HoldDisable;
-                        jump_addr = `ZeroWord;
-                        mem_wdata_o = `ZeroWord;
-                        mem_raddr_o = `ZeroWord;
-                        mem_waddr_o = `ZeroWord;
-                        mem_we = `WriteDisable;
-                        reg_wdata = `ZeroWord;
-                    end
-                endcase
-            end
-            `INST_JAL, `INST_JALR: begin
-                hold_flag = `HoldDisable;
-                mem_wdata_o = `ZeroWord;
-                mem_raddr_o = `ZeroWord;
-                mem_waddr_o = `ZeroWord;
-                mem_we = `WriteDisable;
-                jump_flag = `JumpEnable;
-                jump_addr = op1_jump_add_op2_jump_res;
-                reg_wdata = op1_add_op2_res;
-            end
-            `INST_LUI, `INST_AUIPC: begin
-                hold_flag = `HoldDisable;
-                mem_wdata_o = `ZeroWord;
-                mem_raddr_o = `ZeroWord;
-                mem_waddr_o = `ZeroWord;
-                mem_we = `WriteDisable;
-                jump_addr = `ZeroWord;
-                jump_flag = `JumpDisable;
-                reg_wdata = op1_add_op2_res;
-            end
-            `INST_NOP_OP: begin
-                jump_flag = `JumpDisable;
-                hold_flag = `HoldDisable;
-                jump_addr = `ZeroWord;
-                mem_wdata_o = `ZeroWord;
-                mem_raddr_o = `ZeroWord;
-                mem_waddr_o = `ZeroWord;
-                mem_we = `WriteDisable;
-                reg_wdata = `ZeroWord;
-            end
-            `INST_FENCE: begin
-                hold_flag = `HoldDisable;
-                mem_wdata_o = `ZeroWord;
-                mem_raddr_o = `ZeroWord;
-                mem_waddr_o = `ZeroWord;
-                mem_we = `WriteDisable;
-                reg_wdata = `ZeroWord;
-                jump_flag = `JumpEnable;
-                jump_addr = op1_jump_add_op2_jump_res;
-            end
-            `INST_CSR: begin
-                jump_flag = `JumpDisable;
-                hold_flag = `HoldDisable;
-                jump_addr = `ZeroWord;
-                mem_wdata_o = `ZeroWord;
-                mem_raddr_o = `ZeroWord;
-                mem_waddr_o = `ZeroWord;
-                mem_we = `WriteDisable;
-                case (funct3)
-                    `INST_CSRRW: begin
-                        csr_wdata_o = reg1_rdata_i;
-                        reg_wdata = csr_rdata_i;
-                    end
-                    `INST_CSRRS: begin
-                        csr_wdata_o = reg1_rdata_i | csr_rdata_i;
-                        reg_wdata = csr_rdata_i;
-                    end
-                    `INST_CSRRC: begin
-                        csr_wdata_o = csr_rdata_i & (~reg1_rdata_i);
-                        reg_wdata = csr_rdata_i;
-                    end
-                    `INST_CSRRWI: begin
-                        csr_wdata_o = {27'h0, uimm};
-                        reg_wdata = csr_rdata_i;
-                    end
-                    `INST_CSRRSI: begin
-                        csr_wdata_o = {27'h0, uimm} | csr_rdata_i;
-                        reg_wdata = csr_rdata_i;
-                    end
-                    `INST_CSRRCI: begin
-                        csr_wdata_o = (~{27'h0, uimm}) & csr_rdata_i;
-                        reg_wdata = csr_rdata_i;
-                    end
-                    default: begin
-                        jump_flag = `JumpDisable;
-                        hold_flag = `HoldDisable;
-                        jump_addr = `ZeroWord;
-                        mem_wdata_o = `ZeroWord;
-                        mem_raddr_o = `ZeroWord;
-                        mem_waddr_o = `ZeroWord;
-                        mem_we = `WriteDisable;
-                        reg_wdata = `ZeroWord;
-                    end
-                endcase
-            end
-            default: begin
-                jump_flag = `JumpDisable;
-                hold_flag = `HoldDisable;
-                jump_addr = `ZeroWord;
-                mem_wdata_o = `ZeroWord;
-                mem_raddr_o = `ZeroWord;
-                mem_waddr_o = `ZeroWord;
-                mem_we = `WriteDisable;
-                reg_wdata = `ZeroWord;
-            end
-        endcase
-    end
-
-endmodule

rtl/core/exception.sv

@@ -0,0 +1,308 @@
+ /*                                                                      
+ Copyright 2021 Blue Liang, liangkangnan@163.com
+                                                                         
+ Licensed under the Apache License, Version 2.0 (the "License");         
+ you may not use this file except in compliance with the License.        
+ You may obtain a copy of the License at                                 
+                                                                         
+     http://www.apache.org/licenses/LICENSE-2.0                          
+                                                                         
+ Unless required by applicable law or agreed to in writing, software    
+ distributed under the License is distributed on an "AS IS" BASIS,       
+ WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ See the License for the specific language governing permissions and     
+ limitations under the License.                                          
+ */
+
+`include "defines.sv"
+
+`define DCSR_CAUSE_NONE         3'h0
+`define DCSR_CAUSE_STEP         3'h4
+`define DCSR_CAUSE_DBGREQ       3'h3
+`define DCSR_CAUSE_EBREAK       3'h1
+`define DCSR_CAUSE_HALT         3'h5
+`define DCSR_CAUSE_TRIGGER      3'h2
+
+
+module exception (
+
+    input wire clk,
+    input wire rst_n,
+
+    input wire inst_valid_i,
+    input wire inst_executed_i,
+    input wire inst_ecall_i,                    // ecall指令
+    input wire inst_ebreak_i,                   // ebreak指令
+    input wire inst_mret_i,                     // mret指令
+    input wire inst_dret_i,                     // dret指令
+    input wire[31:0] inst_addr_i,               // 指令地址
+
+    input wire illegal_inst_i,                  // 非法指令
+
+    input wire[31:0] mtvec_i,                   // mtvec寄存器
+    input wire[31:0] mepc_i,                    // mepc寄存器
+    input wire[31:0] mstatus_i,                 // mstatus寄存器
+    input wire[31:0] mie_i,                     // mie寄存器
+    input wire[31:0] dpc_i,                     // dpc寄存器
+    input wire[31:0] dcsr_i,                    // dcsr寄存器
+
+    input wire int_req_i,
+    input wire[7:0] int_id_i,
+
+    input wire trigger_match_i,
+
+    input wire[31:0] debug_halt_addr_i,
+    input wire debug_req_i,
+
+    output wire csr_we_o,                       // 写CSR寄存器标志
+    output wire[31:0] csr_waddr_o,              // 写CSR寄存器地址
+    output wire[31:0] csr_wdata_o,              // 写CSR寄存器数据
+
+    output wire stall_flag_o,                   // 流水线暂停标志
+    output wire[31:0] int_addr_o,               // 中断入口地址
+    output wire int_assert_o                    // 中断标志
+
+    );
+
+    // 异常偏移
+    localparam ILLEGAL_INSTR_OFFSET         = 0;
+    localparam INSTR_ADDR_MISA_OFFSET       = 4;
+    localparam ECALL_OFFSET                 = 8;
+    localparam EBREAK_OFFSET                = 12;
+    localparam LOAD_MISA_OFFSET             = 16;
+    localparam STORE_MISA_OFFSET            = 20;
+    localparam RESERVED1_EXCEPTION_OFFSET   = 24;
+    localparam RESERVED2_EXCEPTION_OFFSET   = 28;
+    // 中断偏移
+    localparam INT_OFFSET                   = 32;
+
+    localparam S_IDLE       = 5'b00001;
+    localparam S_W_MEPC     = 5'b00010;
+    localparam S_W_DCSR     = 5'b00100;
+    localparam S_ASSERT     = 5'b01000;
+    localparam S_W_MSTATUS  = 5'b10000;
+
+    reg debug_mode_d, debug_mode_q;
+    reg[4:0] state_d, state_q;
+    reg[31:0] assert_addr_d, assert_addr_q;
+    reg[31:0] return_addr_d, return_addr_q;
+    reg trigger_match_d, trigger_match_q;
+    reg csr_we;
+    reg[31:0] csr_waddr;
+    reg[31:0] csr_wdata;
+
+    reg[7:0] int_id_d, int_id_q;
+    reg in_irq_context_d, in_irq_context_q;
+    wire global_int_en;
+    wire interrupt_req_valid;
+
+    assign global_int_en = mstatus_i[3];
+
+    assign interrupt_req_valid = inst_valid_i &
+                                 int_req_i &
+                                 ((int_id_i != int_id_q) | (~in_irq_context_q));
+
+    reg exception_req;
+    reg[31:0] exception_cause;
+
+    always @ (*) begin
+        if (illegal_inst_i) begin
+            exception_req = 1'b1;
+            exception_cause = 32'h0;
+        end else if (inst_ecall_i & inst_valid_i) begin
+            exception_req = 1'b1;
+            exception_cause = 32'h2;
+        end else begin
+            exception_req = 1'b0;
+            exception_cause = 32'h0;
+        end
+    end
+
+    wire int_or_exception_req;
+    wire[31:0] int_or_exception_cause;
+
+    assign int_or_exception_req   = (interrupt_req_valid & global_int_en & (~debug_mode_q)) | exception_req;
+    assign int_or_exception_cause = exception_req ? exception_cause : (32'h8 + {24'h0, int_id_i});
+
+    wire trigger_matching;
+
+    gen_ticks_sync #(
+        .DP(5),
+        .DW(1)
+    ) gen_trigger_sync (
+        .rst_n(rst_n),
+        .clk(clk),
+        .din(trigger_match_q),
+        .dout(trigger_matching)
+    );
+
+    reg enter_debug_cause_debugger_req;
+    reg enter_debug_cause_single_step;
+    reg enter_debug_cause_ebreak;
+    reg enter_debug_cause_reset_halt;
+    reg enter_debug_cause_trigger;
+    reg[2:0] dcsr_cause_d, dcsr_cause_q;
+
+    always @ (*) begin
+        enter_debug_cause_debugger_req = 1'b0;
+        enter_debug_cause_single_step = 1'b0;
+        enter_debug_cause_ebreak = 1'b0;
+        enter_debug_cause_reset_halt = 1'b0;
+        enter_debug_cause_trigger = 1'b0;
+        dcsr_cause_d = `DCSR_CAUSE_NONE;
+
+        if (trigger_match_i & inst_valid_i & (~trigger_matching)) begin
+            enter_debug_cause_trigger = 1'b1;
+            dcsr_cause_d = `DCSR_CAUSE_TRIGGER;
+        end else if (inst_ebreak_i & inst_valid_i) begin
+            enter_debug_cause_ebreak = 1'b1;
+            dcsr_cause_d = `DCSR_CAUSE_EBREAK;
+        end else if ((inst_addr_i == `CPU_RESET_ADDR) & inst_valid_i & debug_req_i) begin
+            enter_debug_cause_reset_halt = 1'b1;
+            dcsr_cause_d = `DCSR_CAUSE_HALT;
+        end else if ((~debug_mode_q) & debug_req_i & inst_valid_i) begin
+            enter_debug_cause_debugger_req = 1'b1;
+            dcsr_cause_d = `DCSR_CAUSE_DBGREQ;
+        end else if ((~debug_mode_q) & dcsr_i[2] & inst_valid_i & inst_executed_i) begin
+            enter_debug_cause_single_step = 1'b1;
+            dcsr_cause_d = `DCSR_CAUSE_STEP;
+        end
+    end
+
+    wire debug_mode_req = enter_debug_cause_debugger_req |
+                          enter_debug_cause_single_step |
+                          enter_debug_cause_reset_halt |
+                          enter_debug_cause_trigger |
+                          enter_debug_cause_ebreak;
+
+    assign stall_flag_o = ((state_q != S_IDLE) & (state_q != S_ASSERT)) |
+                          int_or_exception_req |
+                          debug_mode_req |
+                          inst_mret_i |
+                          inst_dret_i;
+
+    always @ (*) begin
+        state_d = state_q;
+        assert_addr_d = assert_addr_q;
+        debug_mode_d = debug_mode_q;
+        return_addr_d = return_addr_q;
+        csr_we = 1'b0;
+        csr_waddr = 32'h0;
+        csr_wdata = 32'h0;
+        trigger_match_d = trigger_match_q;
+        int_id_d = int_id_q;
+        in_irq_context_d = in_irq_context_q;
+
+        case (state_q)
+            S_IDLE: begin
+                if (int_or_exception_req & (!debug_mode_q)) begin
+                    csr_we = 1'b1;
+                    csr_waddr = {20'h0, `CSR_MCAUSE};
+                    csr_wdata = int_or_exception_cause;
+                    assert_addr_d = mtvec_i;
+                    return_addr_d = inst_addr_i;
+                    state_d = S_W_MSTATUS;
+                    int_id_d = int_id_i;
+                    in_irq_context_d = 1'b1;
+                end else if (debug_mode_req) begin
+                    debug_mode_d = 1'b1;
+                    if (enter_debug_cause_debugger_req |
+                        enter_debug_cause_single_step |
+                        enter_debug_cause_trigger |
+                        enter_debug_cause_reset_halt) begin
+                        csr_we = 1'b1;
+                        csr_waddr = {20'h0, `CSR_DPC};
+                        csr_wdata = enter_debug_cause_reset_halt ? (`CPU_RESET_ADDR) : inst_addr_i;
+                        // when run openocd compliance test, use it.
+                        // openocd compliance test bug: It report test fail when the reset address is 0x0:
+                        // "NDMRESET should move DPC to reset value."
+                        //csr_wdata = enter_debug_cause_reset_halt ? (`CPU_RESET_ADDR + 4'h4) : inst_addr_i;
+                    end
+                    if (enter_debug_cause_trigger) begin
+                        trigger_match_d = 1'b1;
+                    end
+                    assert_addr_d = debug_halt_addr_i;
+                    // ebreak do not change dpc and dcsr value
+                    if (enter_debug_cause_ebreak) begin
+                        state_d = S_ASSERT;
+                    end else begin
+                        state_d = S_W_DCSR;
+                    end
+                end else if (inst_mret_i) begin
+                    in_irq_context_d = 1'b0;
+                    assert_addr_d = mepc_i;
+                    csr_we = 1'b1;
+                    csr_waddr = {20'h0, `CSR_MSTATUS};
+                    // 开全局中断
+                    csr_wdata = {mstatus_i[31:4], 1'b1, mstatus_i[2:0]};
+                    state_d = S_ASSERT;
+                end else if (inst_dret_i) begin
+                    assert_addr_d = dpc_i;
+                    state_d = S_ASSERT;
+                    debug_mode_d = 1'b0;
+                    trigger_match_d = 1'b0;
+                end
+            end
+
+            S_W_MSTATUS: begin
+                csr_we = 1'b1;
+                csr_waddr = {20'h0, `CSR_MSTATUS};
+                // 关全局中断
+                csr_wdata = {mstatus_i[31:4], 1'b0, mstatus_i[2:0]};
+                state_d = S_W_MEPC;
+            end
+
+            S_W_MEPC: begin
+                csr_we = 1'b1;
+                csr_waddr = {20'h0, `CSR_MEPC};
+                csr_wdata = return_addr_q;
+                state_d = S_ASSERT;
+            end
+
+            S_W_DCSR: begin
+                csr_we = 1'b1;
+                csr_waddr = {20'h0, `CSR_DCSR};
+                csr_wdata = {dcsr_i[31:9], dcsr_cause_q, dcsr_i[5:0]};
+                state_d = S_ASSERT;
+            end
+
+            S_ASSERT: begin
+                csr_we = 1'b0;
+                state_d = S_IDLE;
+            end
+
+            default:;
+
+        endcase
+    end
+
+    assign csr_we_o = csr_we;
+    assign csr_waddr_o = csr_waddr;
+    assign csr_wdata_o = csr_wdata;
+
+    assign int_assert_o = (state_q == S_ASSERT);
+    assign int_addr_o   = assert_addr_q;
+
+    always @ (posedge clk or negedge rst_n) begin
+        if (!rst_n) begin
+            state_q <= S_IDLE;
+            assert_addr_q <= 32'h0;
+            debug_mode_q <= 1'b0;
+            return_addr_q <= 32'h0;
+            dcsr_cause_q <= `DCSR_CAUSE_NONE;
+            trigger_match_q <= 1'b0;
+            int_id_q <= 8'h0;
+            in_irq_context_q <= 1'b0;
+        end else begin
+            state_q <= state_d;
+            assert_addr_q <= assert_addr_d;
+            debug_mode_q <= debug_mode_d;
+            return_addr_q <= return_addr_d;
+            dcsr_cause_q <= dcsr_cause_d;
+            trigger_match_q <= trigger_match_d;
+            int_id_q <= int_id_d;
+            in_irq_context_q <= in_irq_context_d;
+        end
+    end
+
+endmodule

rtl/core/exu.sv

@@ -0,0 +1,428 @@
+ /*                                                                      
+ Copyright 2019 Blue Liang, liangkangnan@163.com
+                                                                         
+ Licensed under the Apache License, Version 2.0 (the "License");         
+ you may not use this file except in compliance with the License.        
+ You may obtain a copy of the License at                                 
+                                                                         
+     http://www.apache.org/licenses/LICENSE-2.0                          
+                                                                         
+ Unless required by applicable law or agreed to in writing, software    
+ distributed under the License is distributed on an "AS IS" BASIS,       
+ WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ See the License for the specific language governing permissions and     
+ limitations under the License.                                          
+ */
+
+`include "defines.sv"
+
+// 执行模块
+module exu #(
+    parameter bit          BranchPredictor      = 1'b1
+    )(
+    input wire clk,                         // 时钟
+    input wire rst_n,                       // 复位
+
+    // exception
+    input wire int_assert_i,                // 中断发生标志
+    input wire[31:0] int_addr_i,            // 中断跳转地址
+    input wire int_stall_i,                 // 暂停标志
+    output wire inst_ecall_o,               // ecall指令
+    output wire inst_ebreak_o,              // ebreak指令
+    output wire inst_mret_o,                // mret指令
+    output wire inst_dret_o,                // dret指令
+
+    // mem
+    input wire[31:0] mem_rdata_i,           // 内存输入数据
+    input wire mem_gnt_i,                   // 总线授权
+    input wire mem_rvalid_i,                // 总线响应
+    output wire[31:0] mem_wdata_o,          // 写内存数据
+    output wire[31:0] mem_addr_o,           // 读、写内存地址
+    output wire mem_we_o,                   // 是否要写内存
+    output wire[3:0] mem_be_o,              // 字节位
+    output wire mem_req_o,                  // 访存请求
+    output wire mem_access_misaligned_o,    // 访存不对齐
+
+    // to gpr_reg
+    output wire[31:0] reg_wdata_o,          // 写寄存器数据
+    output wire reg_we_o,                   // 是否要写通用寄存器
+    output wire[4:0] reg_waddr_o,           // 写通用寄存器地址
+
+    // csr_reg
+    input wire[31:0] csr_rdata_i,           // CSR寄存器数据
+    output wire[31:0] csr_raddr_o,          // 读CSR寄存器地址
+    output wire[31:0] csr_wdata_o,          // 写CSR寄存器数据
+    output wire csr_we_o,                   // 是否要写CSR寄存器
+    output wire[31:0] csr_waddr_o,          // 写CSR寄存器地址
+
+    // to pipe_ctrl
+    output wire hold_flag_o,                // 是否暂停标志
+    output wire jump_flag_o,                // 是否跳转标志
+    output wire[31:0] jump_addr_o,          // 跳转目的地址
+
+    //
+    output wire inst_valid_o,               // 指令有效
+    output wire inst_executed_o,            // 指令已经执行完毕
+
+    // from idu_exu
+    input wire inst_valid_i,
+    input wire[31:0] inst_i,
+    input wire[`DECINFO_WIDTH-1:0] dec_info_bus_i,
+    input wire[31:0] dec_imm_i,
+    input wire[31:0] dec_pc_i,
+    input wire[31:0] next_pc_i,
+    input wire[4:0] rd_waddr_i,
+    input wire[31:0] reg1_rdata_i,          // 通用寄存器1输入数据
+    input wire[31:0] reg2_rdata_i,          // 通用寄存器2输入数据
+    input wire rd_we_i
+
+    );
+
+    wire[31:0] next_pc = dec_pc_i + 4'h4;
+
+    // dispatch to ALU
+    wire[31:0] alu_op1_o;
+    wire[31:0] alu_op2_o;
+    wire req_alu_o;
+    wire alu_op_lui_o;
+    wire alu_op_auipc_o;
+    wire alu_op_add_o;
+    wire alu_op_sub_o;
+    wire alu_op_sll_o;
+    wire alu_op_slt_o;
+    wire alu_op_sltu_o;
+    wire alu_op_xor_o;
+    wire alu_op_srl_o;
+    wire alu_op_sra_o;
+    wire alu_op_or_o;
+    wire alu_op_and_o;
+    // dispatch to BJP
+    wire[31:0] bjp_op1_o;
+    wire[31:0] bjp_op2_o;
+    wire[31:0] bjp_jump_op1_o;
+    wire[31:0] bjp_jump_op2_o;
+    wire req_bjp_o;
+    wire bjp_op_jump_o;
+    wire bjp_op_beq_o;
+    wire bjp_op_bne_o;
+    wire bjp_op_blt_o;
+    wire bjp_op_bltu_o;
+    wire bjp_op_bge_o;
+    wire bjp_op_bgeu_o;
+    wire bjp_op_jalr_o;
+    // dispatch to MULDIV
+    wire req_muldiv_o;
+    wire[31:0] muldiv_op1_o;
+    wire[31:0] muldiv_op2_o;
+    wire muldiv_op_mul_o;
+    wire muldiv_op_mulh_o;
+    wire muldiv_op_mulhsu_o;
+    wire muldiv_op_mulhu_o;
+    wire muldiv_op_div_o;
+    wire muldiv_op_divu_o;
+    wire muldiv_op_rem_o;
+    wire muldiv_op_remu_o;
+    // dispatch to CSR
+    wire req_csr_o;
+    wire[31:0] csr_op1_o;
+    wire[31:0] csr_addr_o;
+    wire csr_csrrw_o;
+    wire csr_csrrs_o;
+    wire csr_csrrc_o;
+    // dispatch to MEM
+    wire req_mem_o;
+    wire[31:0] mem_op1_o;
+    wire[31:0] mem_op2_o;
+    wire[31:0] mem_rs2_data_o;
+    wire mem_op_lb_o;
+    wire mem_op_lh_o;
+    wire mem_op_lw_o;
+    wire mem_op_lbu_o;
+    wire mem_op_lhu_o;
+    wire mem_op_sb_o;
+    wire mem_op_sh_o;
+    wire mem_op_sw_o;
+    // dispatch to SYS
+    wire sys_op_nop_o;
+    wire sys_op_mret_o;
+    wire sys_op_ecall_o;
+    wire sys_op_ebreak_o;
+    wire sys_op_fence_o;
+    wire sys_op_dret_o;
+
+    exu_dispatch u_exu_dispatch(
+        // input
+        .clk(clk),
+        .rst_n(rst_n),
+        .dec_info_bus_i(dec_info_bus_i),
+        .dec_imm_i(dec_imm_i),
+        .dec_pc_i(dec_pc_i),
+        .rs1_rdata_i(reg1_rdata_i),
+        .rs2_rdata_i(reg2_rdata_i),
+        // dispatch to ALU
+        .alu_op1_o(alu_op1_o),
+        .alu_op2_o(alu_op2_o),
+        .req_alu_o(req_alu_o),
+        .alu_op_lui_o(alu_op_lui_o),
+        .alu_op_auipc_o(alu_op_auipc_o),
+        .alu_op_add_o(alu_op_add_o),
+        .alu_op_sub_o(alu_op_sub_o),
+        .alu_op_sll_o(alu_op_sll_o),
+        .alu_op_slt_o(alu_op_slt_o),
+        .alu_op_sltu_o(alu_op_sltu_o),
+        .alu_op_xor_o(alu_op_xor_o),
+        .alu_op_srl_o(alu_op_srl_o),
+        .alu_op_sra_o(alu_op_sra_o),
+        .alu_op_or_o(alu_op_or_o),
+        .alu_op_and_o(alu_op_and_o),
+        // dispatch to BJP
+        .bjp_op1_o(bjp_op1_o),
+        .bjp_op2_o(bjp_op2_o),
+        .bjp_jump_op1_o(bjp_jump_op1_o),
+        .bjp_jump_op2_o(bjp_jump_op2_o),
+        .req_bjp_o(req_bjp_o),
+        .bjp_op_jump_o(bjp_op_jump_o),
+        .bjp_op_beq_o(bjp_op_beq_o),
+        .bjp_op_bne_o(bjp_op_bne_o),
+        .bjp_op_blt_o(bjp_op_blt_o),
+        .bjp_op_bltu_o(bjp_op_bltu_o),
+        .bjp_op_bge_o(bjp_op_bge_o),
+        .bjp_op_bgeu_o(bjp_op_bgeu_o),
+        .bjp_op_jalr_o(bjp_op_jalr_o),
+        // dispatch to MULDIV
+        .req_muldiv_o(req_muldiv_o),
+        .muldiv_op1_o(muldiv_op1_o),
+        .muldiv_op2_o(muldiv_op2_o),
+        .muldiv_op_mul_o(muldiv_op_mul_o),
+        .muldiv_op_mulh_o(muldiv_op_mulh_o),
+        .muldiv_op_mulhsu_o(muldiv_op_mulhsu_o),
+        .muldiv_op_mulhu_o(muldiv_op_mulhu_o),
+        .muldiv_op_div_o(muldiv_op_div_o),
+        .muldiv_op_divu_o(muldiv_op_divu_o),
+        .muldiv_op_rem_o(muldiv_op_rem_o),
+        .muldiv_op_remu_o(muldiv_op_remu_o),
+        // dispatch to CSR
+        .req_csr_o(req_csr_o),
+        .csr_op1_o(csr_op1_o),
+        .csr_addr_o(csr_addr_o),
+        .csr_csrrw_o(csr_csrrw_o),
+        .csr_csrrs_o(csr_csrrs_o),
+        .csr_csrrc_o(csr_csrrc_o),
+        // dispatch to MEM
+        .req_mem_o(req_mem_o),
+        .mem_op1_o(mem_op1_o),
+        .mem_op2_o(mem_op2_o),
+        .mem_rs2_data_o(mem_rs2_data_o),
+        .mem_op_lb_o(mem_op_lb_o),
+        .mem_op_lh_o(mem_op_lh_o),
+        .mem_op_lw_o(mem_op_lw_o),
+        .mem_op_lbu_o(mem_op_lbu_o),
+        .mem_op_lhu_o(mem_op_lhu_o),
+        .mem_op_sb_o(mem_op_sb_o),
+        .mem_op_sh_o(mem_op_sh_o),
+        .mem_op_sw_o(mem_op_sw_o),
+        // dispatch to SYS
+        .sys_op_nop_o(sys_op_nop_o),
+        .sys_op_mret_o(sys_op_mret_o),
+        .sys_op_ecall_o(sys_op_ecall_o),
+        .sys_op_ebreak_o(sys_op_ebreak_o),
+        .sys_op_fence_o(sys_op_fence_o),
+        .sys_op_dret_o(sys_op_dret_o)
+    );
+
+    assign inst_ecall_o = sys_op_ecall_o;
+    assign inst_ebreak_o = sys_op_ebreak_o;
+    assign inst_mret_o = sys_op_mret_o;
+    assign inst_dret_o = sys_op_dret_o;
+
+    wire[31:0] alu_res_o;
+    wire[31:0] bjp_res_o;
+    wire bjp_cmp_res_o;
+    wire[31:0] csr_op1 = csr_csrrc_o? (~csr_op1_o): csr_op1_o;
+    wire[31:0] csr_op2 = csr_csrrw_o? (32'h0): csr_rdata_i;
+
+    exu_alu_datapath u_exu_alu_datapath(
+        .clk(clk),
+        .rst_n(rst_n),
+        // ALU
+        .req_alu_i(req_alu_o),
+        .alu_op1_i(alu_op1_o),
+        .alu_op2_i(alu_op2_o),
+        .alu_op_add_i(alu_op_add_o | alu_op_lui_o | alu_op_auipc_o),
+        .alu_op_sub_i(alu_op_sub_o),
+        .alu_op_sll_i(alu_op_sll_o),
+        .alu_op_slt_i(alu_op_slt_o),
+        .alu_op_sltu_i(alu_op_sltu_o),
+        .alu_op_xor_i(alu_op_xor_o),
+        .alu_op_srl_i(alu_op_srl_o),
+        .alu_op_sra_i(alu_op_sra_o),
+        .alu_op_or_i(alu_op_or_o),
+        .alu_op_and_i(alu_op_and_o),
+        // BJP
+        .req_bjp_i(req_bjp_o),
+        .bjp_op1_i(bjp_op1_o),
+        .bjp_op2_i(bjp_op2_o),
+        .bjp_op_beq_i(bjp_op_beq_o),
+        .bjp_op_bne_i(bjp_op_bne_o),
+        .bjp_op_blt_i(bjp_op_blt_o),
+        .bjp_op_bltu_i(bjp_op_bltu_o),
+        .bjp_op_bge_i(bjp_op_bge_o),
+        .bjp_op_bgeu_i(bjp_op_bgeu_o),
+        .bjp_op_jump_i(bjp_op_jump_o),
+        .bjp_jump_op1_i(bjp_jump_op1_o),
+        .bjp_jump_op2_i(bjp_jump_op2_o),
+        // MEM
+        .req_mem_i(req_mem_o),
+        .mem_op1_i(mem_op1_o),
+        .mem_op2_i(mem_op2_o),
+        // CSR
+        .req_csr_i(req_csr_o),
+        .csr_op1_i(csr_op1),
+        .csr_op2_i(csr_op2),
+        .csr_csrrw_i(csr_csrrw_o),
+        .csr_csrrs_i(csr_csrrs_o),
+        .csr_csrrc_i(csr_csrrc_o),
+
+        .alu_res_o(alu_res_o),
+        .bjp_res_o(bjp_res_o),
+        .bjp_cmp_res_o(bjp_cmp_res_o)
+    );
+
+    wire mem_reg_we_o;
+    wire mem_mem_we_o;
+    wire[31:0] mem_wdata;
+    wire mem_stall_o;
+
+    exu_mem u_exu_mem(
+        .clk(clk),
+        .rst_n(rst_n),
+        .req_mem_i(req_mem_o),
+        .mem_addr_i(alu_res_o),
+        .mem_rs2_data_i(mem_rs2_data_o),
+        .mem_gnt_i(mem_gnt_i),
+        .mem_rvalid_i(mem_rvalid_i),
+        .mem_rdata_i(mem_rdata_i),
+        .mem_op_lb_i(mem_op_lb_o),
+        .mem_op_lh_i(mem_op_lh_o),
+        .mem_op_lw_i(mem_op_lw_o),
+        .mem_op_lbu_i(mem_op_lbu_o),
+        .mem_op_lhu_i(mem_op_lhu_o),
+        .mem_op_sb_i(mem_op_sb_o),
+        .mem_op_sh_i(mem_op_sh_o),
+        .mem_op_sw_i(mem_op_sw_o),
+        .mem_access_misaligned_o(mem_access_misaligned_o),
+        .mem_stall_o(mem_stall_o),
+        .mem_addr_o(mem_addr_o),
+        .mem_wdata_o(mem_wdata),
+        .mem_reg_we_o(mem_reg_we_o),
+        .mem_mem_we_o(mem_mem_we_o),
+        .mem_be_o(mem_be_o),
+        .mem_req_o(mem_req_o)
+    );
+
+    wire[31:0] muldiv_reg_wdata_o;
+    wire muldiv_reg_we_o;
+    wire muldiv_stall_o;
+
+    exu_muldiv u_exu_muldiv(
+        .clk(clk),
+        .rst_n(rst_n),
+        .muldiv_op1_i(muldiv_op1_o),
+        .muldiv_op2_i(muldiv_op2_o),
+        .muldiv_op_mul_i(muldiv_op_mul_o),
+        .muldiv_op_mulh_i(muldiv_op_mulh_o),
+        .muldiv_op_mulhsu_i(muldiv_op_mulhsu_o),
+        .muldiv_op_mulhu_i(muldiv_op_mulhu_o),
+        .muldiv_op_div_i(muldiv_op_div_o),
+        .muldiv_op_divu_i(muldiv_op_divu_o),
+        .muldiv_op_rem_i(muldiv_op_rem_o),
+        .muldiv_op_remu_i(muldiv_op_remu_o),
+        .int_stall_i(int_stall_i),
+        .muldiv_reg_wdata_o(muldiv_reg_wdata_o),
+        .muldiv_reg_we_o(muldiv_reg_we_o),
+        .muldiv_stall_o(muldiv_stall_o)
+    );
+
+    wire commit_reg_we_o;
+
+    exu_commit u_exu_commit(
+        .clk(clk),
+        .rst_n(rst_n),
+        .req_muldiv_i(req_muldiv_o),
+        .muldiv_reg_we_i(muldiv_reg_we_o),
+        .muldiv_reg_waddr_i(rd_waddr_i),
+        .muldiv_reg_wdata_i(muldiv_reg_wdata_o),
+        .req_mem_i(req_mem_o),
+        .mem_reg_we_i(mem_reg_we_o),
+        .mem_reg_waddr_i(rd_waddr_i),
+        .mem_reg_wdata_i(mem_wdata),
+        .req_csr_i(req_csr_o),
+        .csr_reg_we_i(req_csr_o),
+        .csr_reg_waddr_i(rd_waddr_i),
+        .csr_reg_wdata_i(csr_rdata_i),
+        .req_bjp_i(req_bjp_o),
+        .bjp_reg_we_i(bjp_op_jump_o),
+        .bjp_reg_wdata_i(next_pc),
+        .bjp_reg_waddr_i(rd_waddr_i),
+        .rd_we_i(rd_we_i),
+        .rd_waddr_i(rd_waddr_i),
+        .alu_reg_wdata_i(alu_res_o),
+        .reg_we_o(commit_reg_we_o),
+        .reg_waddr_o(reg_waddr_o),
+        .reg_wdata_o(reg_wdata_o)
+    );
+
+    assign reg_we_o = commit_reg_we_o & (~int_stall_i);
+
+    wire prdt_taken;
+
+    if (BranchPredictor) begin: g_branch_predictor
+                            // jal
+        assign prdt_taken = ((~bjp_op_jalr_o) & bjp_op_jump_o) |
+                            // bxx & imm[31]
+                            (req_bjp_o & (~bjp_op_jump_o) & dec_imm_i[31]);
+    end else begin: g_no_branch_predictor
+        assign prdt_taken = 1'b0;
+    end
+
+    // bxx分支预测错误
+    wire prdt_taken_error = prdt_taken & (~bjp_cmp_res_o) & req_bjp_o & (~bjp_op_jump_o);
+
+    wire inst_jump = (bjp_cmp_res_o & (~prdt_taken)) |
+                     (bjp_op_jump_o & (~prdt_taken)) |
+                     sys_op_fence_o;
+    assign jump_flag_o = ((inst_jump | prdt_taken_error) & (~int_stall_i)) | int_assert_i;
+    assign jump_addr_o = int_assert_i? int_addr_i:
+                         sys_op_fence_o? next_pc:
+                         prdt_taken_error? next_pc:
+                         bjp_res_o;
+    assign hold_flag_o = muldiv_stall_o | mem_stall_o;
+
+    assign csr_raddr_o = csr_addr_o;
+    assign csr_waddr_o = csr_addr_o;
+    assign csr_we_o = req_csr_o & (~int_stall_i);
+    assign csr_wdata_o = alu_res_o;
+
+    assign mem_we_o = mem_mem_we_o & (~int_stall_i);
+    assign mem_wdata_o = mem_wdata;
+
+    assign inst_valid_o = hold_flag_o? 1'b0: inst_valid_i;
+
+    reg inst_executed_q;
+
+    always @ (posedge clk or negedge rst_n) begin
+        if (!rst_n) begin
+            inst_executed_q <= 1'b0;
+        end else begin
+            if (inst_valid_i) begin
+                inst_executed_q <= (inst_jump & (~int_stall_i)) |
+                                   reg_we_o |
+                                   csr_we_o |
+                                   mem_we_o;
+            end
+        end
+    end
+
+    assign inst_executed_o = inst_executed_q;
+
+endmodule

rtl/core/exu_alu_datapath.sv

@@ -0,0 +1,254 @@
+ /*                                                                      
+ Copyright 2020 Blue Liang, liangkangnan@163.com
+                                                                         
+ Licensed under the Apache License, Version 2.0 (the "License");         
+ you may not use this file except in compliance with the License.        
+ You may obtain a copy of the License at                                 
+                                                                         
+     http://www.apache.org/licenses/LICENSE-2.0                          
+                                                                         
+ Unless required by applicable law or agreed to in writing, software    
+ distributed under the License is distributed on an "AS IS" BASIS,       
+ WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ See the License for the specific language governing permissions and     
+ limitations under the License.                                          
+ */
+
+`include "defines.sv"
+
+
+`define DATAPATH_MUX_WIDTH  (32+32+16)
+
+
+module exu_alu_datapath(
+
+    input wire clk,
+    input wire rst_n,
+
+    // ALU
+    input wire req_alu_i,
+    input wire[31:0] alu_op1_i,
+    input wire[31:0] alu_op2_i,
+    input wire alu_op_add_i,
+    input wire alu_op_sub_i,
+    input wire alu_op_sll_i,
+    input wire alu_op_slt_i,
+    input wire alu_op_sltu_i,
+    input wire alu_op_xor_i,
+    input wire alu_op_srl_i,
+    input wire alu_op_sra_i,
+    input wire alu_op_or_i,
+    input wire alu_op_and_i,
+
+    // BJP
+    input wire req_bjp_i,
+    input wire[31:0] bjp_op1_i,
+    input wire[31:0] bjp_op2_i,
+    input wire bjp_op_beq_i,
+    input wire bjp_op_bne_i,
+    input wire bjp_op_blt_i,
+    input wire bjp_op_bltu_i,
+    input wire bjp_op_bge_i,
+    input wire bjp_op_bgeu_i,
+    input wire bjp_op_jump_i,
+    input wire[31:0] bjp_jump_op1_i,
+    input wire[31:0] bjp_jump_op2_i,
+
+    // MEM
+    input wire req_mem_i,
+    input wire[31:0] mem_op1_i,
+    input wire[31:0] mem_op2_i,
+
+    // CSR
+    input wire req_csr_i,
+    input wire[31:0] csr_op1_i,
+    input wire[31:0] csr_op2_i,
+    input wire csr_csrrw_i,
+    input wire csr_csrrs_i,
+    input wire csr_csrrc_i,
+
+    output wire[31:0] alu_res_o,
+    output wire[31:0] bjp_res_o,
+    output wire bjp_cmp_res_o
+
+    );
+
+    wire[31:0] mux_op1;
+    wire[31:0] mux_op2;
+    wire op_add;
+    wire op_sub;
+    wire op_sll;
+    wire op_slt;
+    wire op_sltu;
+    wire op_xor;
+    wire op_srl;
+    wire op_sra;
+    wire op_or;
+    wire op_and;
+    wire op_beq;
+    wire op_bne;
+    wire op_blt;
+    wire op_bltu;
+    wire op_bge;
+    wire op_bgeu;
+
+    // 异或
+    wire[31:0] xor_res = mux_op1 ^ mux_op2;
+    // 或
+    wire[31:0] or_res = mux_op1 | mux_op2;
+    // 与
+    wire[31:0] and_res = mux_op1 & mux_op2;
+    // 加、减
+    wire[31:0] add_op1 = req_bjp_i? bjp_jump_op1_i: mux_op1;
+    wire[31:0] add_op2 = req_bjp_i? bjp_jump_op2_i: mux_op2;
+    wire[31:0] add_sub_res = add_op1 + (op_sub? (-add_op2): add_op2);
+    // 左移
+    wire[31:0] sll_res = mux_op1 << mux_op2[4:0];
+    // 逻辑右移
+    wire[31:0] srl_res = mux_op1 >> mux_op2[4:0];
+    // 算数右移
+    wire[31:0] sr_shift_mask = 32'hffffffff >> mux_op2[4:0];
+    wire[31:0] sra_res = (srl_res & sr_shift_mask) | ({32{mux_op1[31]}} & (~sr_shift_mask));
+
+    // 有符号数比较
+    wire op1_ge_op2_signed = ($signed(mux_op1) >= $signed(mux_op2));
+    // 无符号数比较
+    wire op1_ge_op2_unsigned = (mux_op1 >= mux_op2);
+
+    wire op1_neq_op2 = (|xor_res);
+    wire op1_eq_op2 = (~op1_neq_op2);
+
+    wire cmp_res_eq = op_beq & op1_eq_op2;
+    wire cmp_res_neq = op_bne & op1_neq_op2;
+    wire cmp_res_lt = op_blt & (~op1_ge_op2_signed);
+    wire cmp_res_ltu = op_bltu & (~op1_ge_op2_unsigned);
+    wire cmp_res_gt = op_bge & op1_ge_op2_signed;
+    wire cmp_res_gtu = op_bgeu & op1_ge_op2_unsigned;
+
+    wire[31:0] slt_res = (~op1_ge_op2_signed)? 32'h1: 32'h0;
+    wire[31:0] sltu_res = (~op1_ge_op2_unsigned)? 32'h1: 32'h0;
+
+    reg[31:0] alu_datapath_res;
+
+    always @ (*) begin
+        alu_datapath_res = 32'h0;
+        case (1'b1)
+            op_xor:  alu_datapath_res = xor_res;
+            op_or:   alu_datapath_res = or_res;
+            op_and:  alu_datapath_res = and_res;
+            op_add:  alu_datapath_res = add_sub_res;
+            op_sub:  alu_datapath_res = add_sub_res;
+            op_sll:  alu_datapath_res = sll_res;
+            op_srl:  alu_datapath_res = srl_res;
+            op_sra:  alu_datapath_res = sra_res;
+            op_slt:  alu_datapath_res = slt_res;
+            op_sltu: alu_datapath_res = sltu_res;
+        endcase
+    end
+
+    assign alu_res_o = alu_datapath_res;
+
+    assign bjp_res_o = alu_datapath_res;
+
+    assign bjp_cmp_res_o = cmp_res_eq | cmp_res_neq | cmp_res_lt | cmp_res_ltu | cmp_res_gt | cmp_res_gtu;
+
+    assign {mux_op1,
+            mux_op2,
+            op_add,
+            op_sub,
+            op_sll,
+            op_slt,
+            op_sltu,
+            op_xor,
+            op_srl,
+            op_sra,
+            op_or,
+            op_and,
+            op_beq,
+            op_bne,
+            op_blt,
+            op_bltu,
+            op_bge,
+            op_bgeu
+            } = ({`DATAPATH_MUX_WIDTH{req_alu_i}} & {
+                  alu_op1_i,
+                  alu_op2_i,
+                  alu_op_add_i,
+                  alu_op_sub_i,
+                  alu_op_sll_i,
+                  alu_op_slt_i,
+                  alu_op_sltu_i,
+                  alu_op_xor_i,
+                  alu_op_srl_i,
+                  alu_op_sra_i,
+                  alu_op_or_i,
+                  alu_op_and_i,
+                  1'b0,
+                  1'b0,
+                  1'b0,
+                  1'b0,
+                  1'b0,
+                  1'b0
+                 }) |
+                ({`DATAPATH_MUX_WIDTH{req_bjp_i}} & {
+                  bjp_op1_i,
+                  bjp_op2_i,
+                  1'b1,
+                  1'b0,
+                  1'b0,
+                  1'b0,
+                  1'b0,
+                  1'b0,
+                  1'b0,
+                  1'b0,
+                  1'b0,
+                  1'b0,
+                  bjp_op_beq_i,
+                  bjp_op_bne_i,
+                  bjp_op_blt_i,
+                  bjp_op_bltu_i,
+                  bjp_op_bge_i,
+                  bjp_op_bgeu_i
+                 }) |
+                ({`DATAPATH_MUX_WIDTH{req_mem_i}} & {
+                  mem_op1_i,
+                  mem_op2_i,
+                  1'b1,
+                  1'b0,
+                  1'b0,
+                  1'b0,
+                  1'b0,
+                  1'b0,
+                  1'b0,
+                  1'b0,
+                  1'b0,
+                  1'b0,
+                  1'b0,
+                  1'b0,
+                  1'b0,
+                  1'b0,
+                  1'b0,
+                  1'b0
+                 }) |
+                ({`DATAPATH_MUX_WIDTH{req_csr_i}} & {
+                  csr_op1_i,
+                  csr_op2_i,
+                  1'b0,
+                  1'b0,
+                  1'b0,
+                  1'b0,
+                  1'b0,
+                  1'b0,
+                  1'b0,
+                  1'b0,
+                  csr_csrrw_i | csr_csrrs_i,
+                  csr_csrrc_i,
+                  1'b0,
+                  1'b0,
+                  1'b0,
+                  1'b0,
+                  1'b0,
+                  1'b0
+                 });
+
+endmodule

rtl/core/exu_commit.sv

@@ -0,0 +1,92 @@
+ /*                                                                      
+ Copyright 2020 Blue Liang, liangkangnan@163.com
+                                                                         
+ Licensed under the Apache License, Version 2.0 (the "License");         
+ you may not use this file except in compliance with the License.        
+ You may obtain a copy of the License at                                 
+                                                                         
+     http://www.apache.org/licenses/LICENSE-2.0                          
+                                                                         
+ Unless required by applicable law or agreed to in writing, software    
+ distributed under the License is distributed on an "AS IS" BASIS,       
+ WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ See the License for the specific language governing permissions and     
+ limitations under the License.                                          
+ */
+
+`include "defines.sv"
+
+
+module exu_commit(
+
+    input wire clk,
+    input wire rst_n,
+
+    input wire req_muldiv_i,
+    input wire muldiv_reg_we_i,
+    input wire[4:0] muldiv_reg_waddr_i,
+    input wire[31:0] muldiv_reg_wdata_i,
+
+    input wire req_mem_i,
+    input wire mem_reg_we_i,
+    input wire[4:0] mem_reg_waddr_i,
+    input wire[31:0] mem_reg_wdata_i,
+
+    input wire req_csr_i,
+    input wire csr_reg_we_i,
+    input wire[4:0] csr_reg_waddr_i,
+    input wire[31:0] csr_reg_wdata_i,
+
+    input wire req_bjp_i,
+    input wire bjp_reg_we_i,
+    input wire[31:0] bjp_reg_wdata_i,
+    input wire[4:0] bjp_reg_waddr_i,
+
+    input wire rd_we_i,
+    input wire[4:0] rd_waddr_i,
+    input wire[31:0] alu_reg_wdata_i,
+
+    output wire reg_we_o,
+    output wire[4:0] reg_waddr_o,
+    output wire[31:0] reg_wdata_o
+
+    );
+
+    wire use_alu_res = (~req_muldiv_i) &
+                       (~req_mem_i) &
+                       (~req_csr_i) &
+                       (~req_bjp_i);
+
+    assign reg_we_o = muldiv_reg_we_i | mem_reg_we_i | csr_reg_we_i | use_alu_res | bjp_reg_we_i;
+
+    reg[4:0] reg_waddr;
+
+    always @ (*) begin
+        reg_waddr = 5'h0;
+        case (1'b1)
+            muldiv_reg_we_i: reg_waddr = muldiv_reg_waddr_i;
+            mem_reg_we_i:    reg_waddr = mem_reg_waddr_i;
+            csr_reg_we_i:    reg_waddr = csr_reg_waddr_i;
+            bjp_reg_we_i:    reg_waddr = bjp_reg_waddr_i;
+            rd_we_i:         reg_waddr = rd_waddr_i;
+        endcase
+    end
+
+    assign reg_waddr_o = reg_waddr;
+
+    reg[31:0] reg_wdata;
+
+    always @ (*) begin
+        reg_wdata = 32'h0;
+        case (1'b1)
+            muldiv_reg_we_i: reg_wdata = muldiv_reg_wdata_i;
+            mem_reg_we_i:    reg_wdata = mem_reg_wdata_i;
+            csr_reg_we_i:    reg_wdata = csr_reg_wdata_i;
+            bjp_reg_we_i:    reg_wdata = bjp_reg_wdata_i;
+            use_alu_res:     reg_wdata = alu_reg_wdata_i;
+        endcase
+    end
+
+    assign reg_wdata_o = reg_wdata;
+
+endmodule

rtl/core/exu_dispatch.sv

@@ -0,0 +1,214 @@
+ /*                                                                      
+ Copyright 2020 Blue Liang, liangkangnan@163.com
+                                                                         
+ Licensed under the Apache License, Version 2.0 (the "License");         
+ you may not use this file except in compliance with the License.        
+ You may obtain a copy of the License at                                 
+                                                                         
+     http://www.apache.org/licenses/LICENSE-2.0                          
+                                                                         
+ Unless required by applicable law or agreed to in writing, software    
+ distributed under the License is distributed on an "AS IS" BASIS,       
+ WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ See the License for the specific language governing permissions and     
+ limitations under the License.                                          
+ */
+
+`include "defines.sv"
+
+
+module exu_dispatch(
+
+    input wire clk,
+    input wire rst_n,
+
+    input wire[`DECINFO_WIDTH-1:0] dec_info_bus_i,
+    input wire[31:0] dec_imm_i,
+    input wire[31:0] dec_pc_i,
+    input wire[31:0] rs1_rdata_i,
+    input wire[31:0] rs2_rdata_i,
+
+    // dispatch to ALU
+    output wire req_alu_o,
+    output wire[31:0] alu_op1_o,
+    output wire[31:0] alu_op2_o,
+    output wire alu_op_lui_o,
+    output wire alu_op_auipc_o,
+    output wire alu_op_add_o,
+    output wire alu_op_sub_o,
+    output wire alu_op_sll_o,
+    output wire alu_op_slt_o,
+    output wire alu_op_sltu_o,
+    output wire alu_op_xor_o,
+    output wire alu_op_srl_o,
+    output wire alu_op_sra_o,
+    output wire alu_op_or_o,
+    output wire alu_op_and_o,
+
+    // dispatch to BJP
+    output wire req_bjp_o,
+    output wire[31:0] bjp_op1_o,
+    output wire[31:0] bjp_op2_o,
+    output wire[31:0] bjp_jump_op1_o,
+    output wire[31:0] bjp_jump_op2_o,
+    output wire bjp_op_jump_o,
+    output wire bjp_op_beq_o,
+    output wire bjp_op_bne_o,
+    output wire bjp_op_blt_o,
+    output wire bjp_op_bltu_o,
+    output wire bjp_op_bge_o,
+    output wire bjp_op_bgeu_o,
+    output wire bjp_op_jalr_o,
+
+    // dispatch to MULDIV
+    output wire req_muldiv_o,
+    output wire[31:0] muldiv_op1_o,
+    output wire[31:0] muldiv_op2_o,
+    output wire muldiv_op_mul_o,
+    output wire muldiv_op_mulh_o,
+    output wire muldiv_op_mulhsu_o,
+    output wire muldiv_op_mulhu_o,
+    output wire muldiv_op_div_o,
+    output wire muldiv_op_divu_o,
+    output wire muldiv_op_rem_o,
+    output wire muldiv_op_remu_o,
+
+    // dispatch to CSR
+    output wire req_csr_o,
+    output wire[31:0] csr_op1_o,
+    output wire[31:0] csr_addr_o,
+    output wire csr_csrrw_o,
+    output wire csr_csrrs_o,
+    output wire csr_csrrc_o,
+
+    // dispatch to MEM
+    output wire req_mem_o,
+    output wire[31:0] mem_op1_o,
+    output wire[31:0] mem_op2_o,
+    output wire[31:0] mem_rs2_data_o,
+    output wire mem_op_lb_o,
+    output wire mem_op_lh_o,
+    output wire mem_op_lw_o,
+    output wire mem_op_lbu_o,
+    output wire mem_op_lhu_o,
+    output wire mem_op_sb_o,
+    output wire mem_op_sh_o,
+    output wire mem_op_sw_o,
+
+    // dispatch to SYS
+    output wire sys_op_nop_o,
+    output wire sys_op_mret_o,
+    output wire sys_op_ecall_o,
+    output wire sys_op_ebreak_o,
+    output wire sys_op_fence_o,
+    output wire sys_op_dret_o
+
+    );
+
+    wire[`DECINFO_GRP_WIDTH-1:0] disp_info_grp = dec_info_bus_i[`DECINFO_GRP_BUS];
+
+    // ALU info
+    wire op_alu = (disp_info_grp == `DECINFO_GRP_ALU);
+    wire[`DECINFO_WIDTH-1:0] alu_info = {`DECINFO_WIDTH{op_alu}} & dec_info_bus_i;
+    // ALU op1
+    wire alu_op1_pc = alu_info[`DECINFO_ALU_OP1PC];
+    wire alu_op1_zero = alu_info[`DECINFO_ALU_LUI];
+    wire[31:0] alu_op1 = alu_op1_pc? dec_pc_i: alu_op1_zero? 32'h0: rs1_rdata_i;
+    assign alu_op1_o = op_alu? alu_op1: 32'h0;
+    // ALU op2
+    wire alu_op2_imm = alu_info[`DECINFO_ALU_OP2IMM];
+    wire[31:0] alu_op2 = alu_op2_imm? dec_imm_i: rs2_rdata_i;
+    assign alu_op2_o = op_alu? alu_op2: 32'h0;
+    assign alu_op_lui_o = alu_info[`DECINFO_ALU_LUI];
+    assign alu_op_auipc_o = alu_info[`DECINFO_ALU_AUIPC];
+    assign alu_op_add_o = alu_info[`DECINFO_ALU_ADD];
+    assign alu_op_sub_o = alu_info[`DECINFO_ALU_SUB];
+    assign alu_op_sll_o = alu_info[`DECINFO_ALU_SLL];
+    assign alu_op_slt_o = alu_info[`DECINFO_ALU_SLT];
+    assign alu_op_sltu_o = alu_info[`DECINFO_ALU_SLTU];
+    assign alu_op_xor_o = alu_info[`DECINFO_ALU_XOR];
+    assign alu_op_srl_o = alu_info[`DECINFO_ALU_SRL];
+    assign alu_op_sra_o = alu_info[`DECINFO_ALU_SRA];
+    assign alu_op_or_o = alu_info[`DECINFO_ALU_OR];
+    assign alu_op_and_o = alu_info[`DECINFO_ALU_AND];
+    assign req_alu_o = op_alu;
+
+    // BJP info
+    wire op_bjp = (disp_info_grp == `DECINFO_GRP_BJP);
+    wire[`DECINFO_WIDTH-1:0] bjp_info = {`DECINFO_WIDTH{op_bjp}} & dec_info_bus_i;
+    // BJP op1
+    wire bjp_op1_rs1 = bjp_info[`DECINFO_BJP_OP1RS1];
+    wire[31:0] bjp_op1 = bjp_op1_rs1? rs1_rdata_i: dec_pc_i;
+    assign bjp_jump_op1_o = op_bjp? bjp_op1: 32'h0;
+    // BJP op2
+    wire[31:0] bjp_op2 = dec_imm_i;
+    assign bjp_jump_op2_o = op_bjp? bjp_op2: 32'h0;
+    assign bjp_op1_o = op_bjp? rs1_rdata_i: 32'h0;
+    assign bjp_op2_o = op_bjp? rs2_rdata_i: 32'h0;
+    assign bjp_op_jump_o = bjp_info[`DECINFO_BJP_JUMP];
+    assign bjp_op_beq_o = bjp_info[`DECINFO_BJP_BEQ];
+    assign bjp_op_bne_o = bjp_info[`DECINFO_BJP_BNE];
+    assign bjp_op_blt_o = bjp_info[`DECINFO_BJP_BLT];
+    assign bjp_op_bltu_o = bjp_info[`DECINFO_BJP_BLTU];
+    assign bjp_op_bge_o = bjp_info[`DECINFO_BJP_BGE];
+    assign bjp_op_bgeu_o = bjp_info[`DECINFO_BJP_BGEU];
+    assign req_bjp_o = op_bjp;
+    assign bjp_op_jalr_o = bjp_op1_rs1;
+
+    // MULDIV info
+    wire op_muldiv = (disp_info_grp == `DECINFO_GRP_MULDIV);
+    wire[`DECINFO_WIDTH-1:0] muldiv_info = {`DECINFO_WIDTH{op_muldiv}} & dec_info_bus_i;
+    // MULDIV op1
+    assign muldiv_op1_o = op_muldiv? rs1_rdata_i: 32'h0;
+    // MULDIV op2
+    assign muldiv_op2_o = op_muldiv? rs2_rdata_i: 32'h0;
+    assign muldiv_op_mul_o = muldiv_info[`DECINFO_MULDIV_MUL];
+    assign muldiv_op_mulh_o = muldiv_info[`DECINFO_MULDIV_MULH];
+    assign muldiv_op_mulhu_o = muldiv_info[`DECINFO_MULDIV_MULHU];
+    assign muldiv_op_mulhsu_o = muldiv_info[`DECINFO_MULDIV_MULHSU];
+    assign muldiv_op_div_o = muldiv_info[`DECINFO_MULDIV_DIV];
+    assign muldiv_op_divu_o = muldiv_info[`DECINFO_MULDIV_DIVU];
+    assign muldiv_op_rem_o = muldiv_info[`DECINFO_MULDIV_REM];
+    assign muldiv_op_remu_o = muldiv_info[`DECINFO_MULDIV_REMU];
+    assign req_muldiv_o = op_muldiv;
+
+    // CSR info
+    wire op_csr = (disp_info_grp == `DECINFO_GRP_CSR);
+    wire[`DECINFO_WIDTH-1:0] csr_info = {`DECINFO_WIDTH{op_csr}} & dec_info_bus_i;
+    // CSR op1
+    wire csr_rs1imm = csr_info[`DECINFO_CSR_RS1IMM];
+    wire[31:0] csr_rs1 = csr_rs1imm? dec_imm_i: rs1_rdata_i;
+    assign csr_op1_o = op_csr? csr_rs1: 32'h0;
+    assign csr_addr_o = {{20{1'b0}}, csr_info[`DECINFO_CSR_CSRADDR]};
+    assign csr_csrrw_o = csr_info[`DECINFO_CSR_CSRRW];
+    assign csr_csrrs_o = csr_info[`DECINFO_CSR_CSRRS];
+    assign csr_csrrc_o = csr_info[`DECINFO_CSR_CSRRC];
+    assign req_csr_o = op_csr;
+
+    // MEM info
+    wire op_mem = (disp_info_grp == `DECINFO_GRP_MEM);
+    wire[`DECINFO_WIDTH-1:0] mem_info = {`DECINFO_WIDTH{op_mem}} & dec_info_bus_i;
+    assign mem_op_lb_o = mem_info[`DECINFO_MEM_LB];
+    assign mem_op_lh_o = mem_info[`DECINFO_MEM_LH];
+    assign mem_op_lw_o = mem_info[`DECINFO_MEM_LW];
+    assign mem_op_lbu_o = mem_info[`DECINFO_MEM_LBU];
+    assign mem_op_lhu_o = mem_info[`DECINFO_MEM_LHU];
+    assign mem_op_sb_o = mem_info[`DECINFO_MEM_SB];
+    assign mem_op_sh_o = mem_info[`DECINFO_MEM_SH];
+    assign mem_op_sw_o = mem_info[`DECINFO_MEM_SW];
+    assign mem_op1_o = op_mem? rs1_rdata_i: 32'h0;
+    assign mem_op2_o = op_mem? dec_imm_i: 32'h0;
+    assign mem_rs2_data_o = op_mem? rs2_rdata_i: 32'h0;
+    assign req_mem_o = op_mem;
+
+    // SYS info
+    wire op_sys = (disp_info_grp == `DECINFO_GRP_SYS);
+    wire[`DECINFO_WIDTH-1:0] sys_info = {`DECINFO_WIDTH{op_sys}} & dec_info_bus_i;
+    assign sys_op_nop_o = sys_info[`DECINFO_SYS_NOP];
+    assign sys_op_mret_o = sys_info[`DECINFO_SYS_MRET];
+    assign sys_op_ecall_o = sys_info[`DECINFO_SYS_ECALL];
+    assign sys_op_ebreak_o = sys_info[`DECINFO_SYS_EBREAK];
+    assign sys_op_fence_o = sys_info[`DECINFO_SYS_FENCE];
+    assign sys_op_dret_o = sys_info[`DECINFO_SYS_DRET];
+
+endmodule

rtl/core/exu_mem.sv

@@ -0,0 +1,214 @@
+ /*                                                                      
+ Copyright 2020 Blue Liang, liangkangnan@163.com
+                                                                         
+ Licensed under the Apache License, Version 2.0 (the "License");         
+ you may not use this file except in compliance with the License.        
+ You may obtain a copy of the License at                                 
+                                                                         
+     http://www.apache.org/licenses/LICENSE-2.0                          
+                                                                         
+ Unless required by applicable law or agreed to in writing, software    
+ distributed under the License is distributed on an "AS IS" BASIS,       
+ WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ See the License for the specific language governing permissions and     
+ limitations under the License.                                          
+ */
+
+`include "defines.sv"
+
+
+module exu_mem(
+
+    input wire clk,
+    input wire rst_n,
+
+    input req_mem_i,
+    input wire[31:0] mem_addr_i,
+    input wire[31:0] mem_rs2_data_i,
+    input wire[31:0] mem_rdata_i,
+    input wire mem_gnt_i,
+    input wire mem_rvalid_i,
+    input wire mem_op_lb_i,
+    input wire mem_op_lh_i,
+    input wire mem_op_lw_i,
+    input wire mem_op_lbu_i,
+    input wire mem_op_lhu_i,
+    input wire mem_op_sb_i,
+    input wire mem_op_sh_i,
+    input wire mem_op_sw_i,
+
+    output wire mem_access_misaligned_o,
+    output wire mem_stall_o,
+    output wire[31:0] mem_addr_o,
+    output wire[31:0] mem_wdata_o,
+    output wire mem_reg_we_o,
+    output wire mem_mem_we_o,
+    output wire[3:0] mem_be_o,
+    output wire mem_req_o
+
+    );
+
+
+    wire[1:0] mem_addr_index = mem_addr_i[1:0];
+    wire mem_addr_index00 = (mem_addr_index == 2'b00);
+    wire mem_addr_index01 = (mem_addr_index == 2'b01);
+    wire mem_addr_index10 = (mem_addr_index == 2'b10);
+    wire mem_addr_index11 = (mem_addr_index == 2'b11);
+
+    assign mem_be_o[0] = mem_addr_index00 | mem_op_sw_i;
+    assign mem_be_o[1] = mem_addr_index01 | (mem_op_sh_i & mem_addr_index00) | mem_op_sw_i;
+    assign mem_be_o[2] = mem_addr_index10 | mem_op_sw_i;
+    assign mem_be_o[3] = mem_addr_index11 | (mem_op_sh_i & mem_addr_index10) | mem_op_sw_i;
+
+    reg[31:0] sb_res;
+
+    always @ (*) begin
+        sb_res = 32'h0;
+        case (1'b1)
+            mem_addr_index00: sb_res = {24'h0, mem_rs2_data_i[7:0]};
+            mem_addr_index01: sb_res = {16'h0, mem_rs2_data_i[7:0], 8'h0};
+            mem_addr_index10: sb_res = {8'h0, mem_rs2_data_i[7:0], 16'h0};
+            mem_addr_index11: sb_res = {mem_rs2_data_i[7:0], 24'h0};
+        endcase
+    end
+
+    reg[31:0] sh_res;
+
+    always @ (*) begin
+        sh_res = 32'h0;
+        case (1'b1)
+            mem_addr_index00: sh_res = {16'h0, mem_rs2_data_i[15:0]};
+            mem_addr_index10: sh_res = {mem_rs2_data_i[15:0], 16'h0};
+        endcase
+    end
+
+    wire[31:0] sw_res = mem_rs2_data_i;
+
+    reg[31:0] lb_res;
+
+    always @ (*) begin
+        lb_res = 32'h0;
+        case (1'b1)
+            mem_addr_index00: lb_res = {{24{mem_op_lb_i & mem_rdata_i[7]}}, mem_rdata_i[7:0]};
+            mem_addr_index01: lb_res = {{24{mem_op_lb_i & mem_rdata_i[15]}}, mem_rdata_i[15:8]};
+            mem_addr_index10: lb_res = {{24{mem_op_lb_i & mem_rdata_i[23]}}, mem_rdata_i[23:16]};
+            mem_addr_index11: lb_res = {{24{mem_op_lb_i & mem_rdata_i[31]}}, mem_rdata_i[31:24]};
+        endcase
+    end
+
+    reg[31:0] lh_res;
+
+    always @ (*) begin
+        lh_res = 32'h0;
+        case (1'b1)
+            mem_addr_index00: lh_res = {{24{mem_op_lh_i & mem_rdata_i[15]}}, mem_rdata_i[15:0]};
+            mem_addr_index10: lh_res = {{24{mem_op_lh_i & mem_rdata_i[31]}}, mem_rdata_i[31:16]};
+        endcase
+    end
+
+    wire[31:0] lw_res = mem_rdata_i;
+
+    reg[31:0] mem_wdata;
+
+    always @ (*) begin
+        mem_wdata = 32'h0;
+        case (1'b1)
+            mem_op_sb_i:  mem_wdata = sb_res;
+            mem_op_sh_i:  mem_wdata = sh_res;
+            mem_op_sw_i:  mem_wdata = sw_res;
+            mem_op_lb_i:  mem_wdata = lb_res;
+            mem_op_lbu_i: mem_wdata = lb_res;
+            mem_op_lh_i:  mem_wdata = lh_res;
+            mem_op_lhu_i: mem_wdata = lh_res;
+            mem_op_lw_i:  mem_wdata = lw_res;
+        endcase
+    end
+
+    assign mem_wdata_o = mem_wdata;
+
+    wire op_load = mem_op_lb_i | mem_op_lh_i | mem_op_lw_i | mem_op_lbu_i | mem_op_lhu_i;
+    wire op_store = mem_op_sb_i | mem_op_sh_i | mem_op_sw_i;
+
+    localparam S_IDLE       = 3'b001;
+    localparam S_WAIT_READ  = 3'b010;
+    localparam S_WAIT_WRITE = 3'b100;
+
+    reg[2:0] state_d, state_q;
+    reg mem_stall_d;
+    reg mem_reg_we_d;
+    reg mem_mem_we_d;
+    reg req_mem_d;
+
+    // 访存状态机
+    always @ (*) begin
+        state_d = state_q;
+
+        mem_stall_d = 1'b0;
+        mem_reg_we_d = 1'b0;
+        mem_mem_we_d = 1'b0;
+        req_mem_d = 1'b0;
+
+        case (state_q)
+            S_IDLE: begin
+                if (req_mem_i) begin
+                    mem_stall_d = 1'b1;
+                    req_mem_d = 1'b1;
+                    if (mem_gnt_i) begin
+                        if (op_load) begin
+                            state_d = S_WAIT_READ;
+                        end else if (op_store) begin
+                            state_d = S_WAIT_WRITE;
+                            mem_mem_we_d = 1'b1;
+                        end
+                    end
+                end
+            end
+
+            // 读内存
+            S_WAIT_READ: begin
+                mem_stall_d = 1'b1;
+                if (mem_rvalid_i) begin
+                    state_d = S_IDLE;
+                    mem_reg_we_d = 1'b1;
+                    mem_stall_d = 1'b0;
+                end
+            end
+
+            // 写内存
+            S_WAIT_WRITE: begin
+                mem_stall_d = 1'b1;
+                if (mem_rvalid_i) begin
+                    state_d = S_IDLE;
+                    mem_stall_d = 1'b0;
+                end
+            end
+
+            default: ;
+        endcase
+    end
+
+    // 访存请求
+    assign mem_req_o  = req_mem_d;
+    // 访存地址
+    assign mem_addr_o = mem_addr_i;
+
+    // 暂停流水线
+    assign mem_stall_o  = mem_stall_d;
+    // 写寄存器使能
+    assign mem_reg_we_o = mem_reg_we_d;
+    // 写内存使能
+    assign mem_mem_we_o = mem_mem_we_d;
+
+    assign mem_access_misaligned_o = (mem_op_sw_i | mem_op_lw_i)? (mem_addr_i[0] | mem_addr_i[1]):
+                                     (mem_op_sh_i | mem_op_lh_i | mem_op_lhu_i)? mem_addr_i[0]:
+                                     0;
+
+    always @ (posedge clk or negedge rst_n) begin
+        if (!rst_n) begin
+            state_q <= S_IDLE;
+        end else begin
+            state_q <= state_d;
+        end
+    end
+
+endmodule

rtl/core/exu_muldiv.sv

@@ -0,0 +1,108 @@
+ /*                                                                      
+ Copyright 2020 Blue Liang, liangkangnan@163.com
+                                                                         
+ Licensed under the Apache License, Version 2.0 (the "License");         
+ you may not use this file except in compliance with the License.        
+ You may obtain a copy of the License at                                 
+                                                                         
+     http://www.apache.org/licenses/LICENSE-2.0                          
+                                                                         
+ Unless required by applicable law or agreed to in writing, software    
+ distributed under the License is distributed on an "AS IS" BASIS,       
+ WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ See the License for the specific language governing permissions and     
+ limitations under the License.                                          
+ */
+
+`include "defines.sv"
+
+
+module exu_muldiv(
+
+    input wire clk,
+    input wire rst_n,
+
+    input wire[31:0] muldiv_op1_i,
+    input wire[31:0] muldiv_op2_i,
+    input wire muldiv_op_mul_i,
+    input wire muldiv_op_mulh_i,
+    input wire muldiv_op_mulhsu_i,
+    input wire muldiv_op_mulhu_i,
+    input wire muldiv_op_div_i,
+    input wire muldiv_op_divu_i,
+    input wire muldiv_op_rem_i,
+    input wire muldiv_op_remu_i,
+
+    input wire int_stall_i,
+
+    output wire[31:0] muldiv_reg_wdata_o,
+    output wire muldiv_reg_we_o,
+    output wire muldiv_stall_o
+
+    );
+
+    // 除法操作
+    wire op_div = muldiv_op_div_i | muldiv_op_divu_i | muldiv_op_rem_i | muldiv_op_remu_i;
+    wire div_start = op_div & (!div_ready) & (~int_stall_i);
+    wire[3:0] div_op = {muldiv_op_div_i, muldiv_op_divu_i, muldiv_op_rem_i, muldiv_op_remu_i};
+    wire[31:0] div_result;
+    wire div_ready;
+
+    divider u_divider(
+        .clk(clk),
+        .rst_n(rst_n),
+        .dividend_i(muldiv_op1_i),
+        .divisor_i(muldiv_op2_i),
+        .start_i(div_start),
+        .op_i(div_op),
+        .result_o(div_result),
+        .ready_o(div_ready)
+    );
+
+    // 乘法操作
+    wire op_mul = muldiv_op_mul_i | muldiv_op_mulh_i | muldiv_op_mulhsu_i | muldiv_op_mulhu_i;
+    wire[31:0] muldiv_op1_r;
+    gen_en_dff #(32) mul_op1_ff(clk, rst_n, op_mul, muldiv_op1_i, muldiv_op1_r);
+    wire[31:0] muldiv_op2_r;
+    gen_en_dff #(32) mul_op2_ff(clk, rst_n, op_mul, muldiv_op2_i, muldiv_op2_r);
+
+    wire mul_ready_r;
+    wire mul_ready = (~mul_ready_r) & op_mul;
+    gen_rst_0_dff #(1) mul_ready_ff(clk, rst_n, mul_ready, mul_ready_r);
+
+    wire mul_start = (~mul_ready_r) & op_mul;
+
+    wire op1_is_signed = muldiv_op1_r[31];
+    wire op2_is_signed = muldiv_op2_r[31];
+    wire[31:0] op1_complcode = op1_is_signed? (-muldiv_op1_r): muldiv_op1_r;
+    wire[31:0] op2_complcode = op2_is_signed? (-muldiv_op2_r): muldiv_op2_r;
+
+    wire[31:0] op1_mul = ({32{(muldiv_op_mul_i | muldiv_op_mulhu_i)}} & muldiv_op1_r) |
+                         ({32{(muldiv_op_mulh_i | muldiv_op_mulhsu_i)}} & op1_complcode);
+    wire[31:0] op2_mul = ({32{(muldiv_op_mul_i | muldiv_op_mulhu_i | muldiv_op_mulhsu_i)}} & muldiv_op2_r) |
+                         ({32{(muldiv_op_mulh_i)}} & op2_complcode);
+    wire[63:0] mul_res_tmp = op1_mul * op2_mul;
+    wire[63:0] mul_res_tmp_complcode = -mul_res_tmp;
+    wire[31:0] mul_res = mul_res_tmp[31:0];
+    wire[31:0] mulhu_res = mul_res_tmp[63:32];
+    wire[31:0] mulh_res = (op1_is_signed ^ op2_is_signed)? mul_res_tmp_complcode[63:32]: mul_res_tmp[63:32];
+    wire[31:0] mulhsu_res = (op1_is_signed)? mul_res_tmp_complcode[63:32]: mul_res_tmp[63:32];
+
+    reg[31:0] mul_op_res;
+
+    always @ (*) begin
+        mul_op_res = 32'h0;
+        case (1'b1)
+            muldiv_op_mul_i:    mul_op_res = mul_res;
+            muldiv_op_mulhu_i:  mul_op_res = mulhu_res;
+            muldiv_op_mulh_i:   mul_op_res = mulh_res;
+            muldiv_op_mulhsu_i: mul_op_res = mulhsu_res;
+        endcase
+    end
+
+    // 运算结果
+    assign muldiv_reg_wdata_o = div_result | mul_op_res;
+    assign muldiv_reg_we_o = div_ready | mul_ready_r;
+    assign muldiv_stall_o = div_start | mul_start;
+
+endmodule

rtl/core/gpr_reg.sv

@@ -0,0 +1,92 @@
+ /*                                                                      
+ Copyright 2019 Blue Liang, liangkangnan@163.com
+                                                                         
+ Licensed under the Apache License, Version 2.0 (the "License");         
+ you may not use this file except in compliance with the License.        
+ You may obtain a copy of the License at                                 
+                                                                         
+     http://www.apache.org/licenses/LICENSE-2.0                          
+                                                                         
+ Unless required by applicable law or agreed to in writing, software    
+ distributed under the License is distributed on an "AS IS" BASIS,       
+ WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ See the License for the specific language governing permissions and     
+ limitations under the License.                                          
+ */
+
+`include "defines.sv"
+
+// 通用寄存器模块
+module gpr_reg(
+
+    input wire clk,
+    input wire rst_n,
+
+    input wire we_i,                        // 写寄存器使能
+    input wire[4:0] waddr_i,                // 写寄存器地址
+    input wire[31:0] wdata_i,               // 写寄存器数据
+
+    input wire[4:0] raddr1_i,               // 读寄存器1地址
+    output wire[31:0] rdata1_o,             // 读寄存器1数据
+
+    input wire[4:0] raddr2_i,               // 读寄存器2地址
+    output wire[31:0] rdata2_o              // 读寄存器2数据
+
+    );
+
+    wire[32-1:0] regs[32-1:0];
+    wire[32-1:0] we;
+
+    genvar i;
+
+    generate
+        for (i = 0; i < 32; i = i + 1) begin: gpr_rw
+            // x0 cannot be wrote since it is constant-zeros
+            if (i == 0) begin: is_x0
+                assign we[i] = 1'b0;
+                assign regs[i] = 32'h0;
+            end else begin: not_x0
+                assign we[i] = we_i & (waddr_i == i);
+                gen_en_dffnr #(32) rf_dff(clk, we[i], wdata_i, regs[i]);
+            end
+        end
+    endgenerate
+
+    assign rdata1_o = (|raddr1_i)? ((we_i & (waddr_i == raddr1_i))? wdata_i: regs[raddr1_i]): 32'h0;
+    assign rdata2_o = (|raddr2_i)? ((we_i & (waddr_i == raddr2_i))? wdata_i: regs[raddr2_i]): 32'h0;
+
+    // for debug
+    wire[31:0] ra = regs[1];
+    wire[31:0] sp = regs[2];
+    wire[31:0] gp = regs[3];
+    wire[31:0] tp = regs[4];
+    wire[31:0] t0 = regs[5];
+    wire[31:0] t1 = regs[6];
+    wire[31:0] t2 = regs[7];
+    wire[31:0] s0 = regs[8];
+    wire[31:0] fp = regs[8];
+    wire[31:0] s1 = regs[9];
+    wire[31:0] a0 = regs[10];
+    wire[31:0] a1 = regs[11];
+    wire[31:0] a2 = regs[12];
+    wire[31:0] a3 = regs[13];
+    wire[31:0] a4 = regs[14];
+    wire[31:0] a5 = regs[15];
+    wire[31:0] a6 = regs[16];
+    wire[31:0] a7 = regs[17];
+    wire[31:0] s2 = regs[18];
+    wire[31:0] s3 = regs[19];
+    wire[31:0] s4 = regs[20];
+    wire[31:0] s5 = regs[21];
+    wire[31:0] s6 = regs[22];
+    wire[31:0] s7 = regs[23];
+    wire[31:0] s8 = regs[24];
+    wire[31:0] s9 = regs[25];
+    wire[31:0] s10 = regs[26];
+    wire[31:0] s11 = regs[27];
+    wire[31:0] t3 = regs[28];
+    wire[31:0] t4 = regs[29];
+    wire[31:0] t5 = regs[30];
+    wire[31:0] t6 = regs[31];
+
+endmodule

rtl/core/id.v

@@ -1,302 +0,0 @@
- /*                                                                      
- Copyright 2019 Blue Liang, liangkangnan@163.com
-                                                                         
- Licensed under the Apache License, Version 2.0 (the "License");         
- you may not use this file except in compliance with the License.        
- You may obtain a copy of the License at                                 
-                                                                         
-     http://www.apache.org/licenses/LICENSE-2.0                          
-                                                                         
- Unless required by applicable law or agreed to in writing, software    
- distributed under the License is distributed on an "AS IS" BASIS,       
- WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- See the License for the specific language governing permissions and     
- limitations under the License.                                          
- */
-
-`include "defines.v"
-
-// 译码模块
-// 纯组合逻辑电路
-module id(
-
-	input wire rst,
-
-    // from if_id
-    input wire[`InstBus] inst_i,             // 指令内容
-    input wire[`InstAddrBus] inst_addr_i,    // 指令地址
-
-    // from regs
-    input wire[`RegBus] reg1_rdata_i,        // 通用寄存器1输入数据
-    input wire[`RegBus] reg2_rdata_i,        // 通用寄存器2输入数据
-
-    // from csr reg
-    input wire[`RegBus] csr_rdata_i,         // CSR寄存器输入数据
-
-    // from ex
-    input wire ex_jump_flag_i,               // 跳转标志
-
-    // to regs
-    output reg[`RegAddrBus] reg1_raddr_o,    // 读通用寄存器1地址
-    output reg[`RegAddrBus] reg2_raddr_o,    // 读通用寄存器2地址
-
-    // to csr reg
-    output reg[`MemAddrBus] csr_raddr_o,     // 读CSR寄存器地址
-
-    // to ex
-    output reg[`MemAddrBus] op1_o,
-    output reg[`MemAddrBus] op2_o,
-    output reg[`MemAddrBus] op1_jump_o,
-    output reg[`MemAddrBus] op2_jump_o,
-    output reg[`InstBus] inst_o,             // 指令内容
-    output reg[`InstAddrBus] inst_addr_o,    // 指令地址
-    output reg[`RegBus] reg1_rdata_o,        // 通用寄存器1数据
-    output reg[`RegBus] reg2_rdata_o,        // 通用寄存器2数据
-    output reg reg_we_o,                     // 写通用寄存器标志
-    output reg[`RegAddrBus] reg_waddr_o,     // 写通用寄存器地址
-    output reg csr_we_o,                     // 写CSR寄存器标志
-    output reg[`RegBus] csr_rdata_o,         // CSR寄存器数据
-    output reg[`MemAddrBus] csr_waddr_o      // 写CSR寄存器地址
-
-    );
-
-    wire[6:0] opcode = inst_i[6:0];
-    wire[2:0] funct3 = inst_i[14:12];
-    wire[6:0] funct7 = inst_i[31:25];
-    wire[4:0] rd = inst_i[11:7];
-    wire[4:0] rs1 = inst_i[19:15];
-    wire[4:0] rs2 = inst_i[24:20];
-
-
-    always @ (*) begin
-        inst_o = inst_i;
-        inst_addr_o = inst_addr_i;
-        reg1_rdata_o = reg1_rdata_i;
-        reg2_rdata_o = reg2_rdata_i;
-        csr_rdata_o = csr_rdata_i;
-        csr_raddr_o = `ZeroWord;
-        csr_waddr_o = `ZeroWord;
-        csr_we_o = `WriteDisable;
-        op1_o = `ZeroWord;
-        op2_o = `ZeroWord;
-        op1_jump_o = `ZeroWord;
-        op2_jump_o = `ZeroWord;
-
-        case (opcode)
-            `INST_TYPE_I: begin
-                case (funct3)
-                    `INST_ADDI, `INST_SLTI, `INST_SLTIU, `INST_XORI, `INST_ORI, `INST_ANDI, `INST_SLLI, `INST_SRI: begin
-                        reg_we_o = `WriteEnable;
-                        reg_waddr_o = rd;
-                        reg1_raddr_o = rs1;
-                        reg2_raddr_o = `ZeroReg;
-                        op1_o = reg1_rdata_i;
-                        op2_o = {{20{inst_i[31]}}, inst_i[31:20]};
-                    end
-                    default: begin
-                        reg_we_o = `WriteDisable;
-                        reg_waddr_o = `ZeroReg;
-                        reg1_raddr_o = `ZeroReg;
-                        reg2_raddr_o = `ZeroReg;
-                    end
-                endcase
-            end
-            `INST_TYPE_R_M: begin
-                if ((funct7 == 7'b0000000) || (funct7 == 7'b0100000)) begin
-                    case (funct3)
-                        `INST_ADD_SUB, `INST_SLL, `INST_SLT, `INST_SLTU, `INST_XOR, `INST_SR, `INST_OR, `INST_AND: begin
-                            reg_we_o = `WriteEnable;
-                            reg_waddr_o = rd;
-                            reg1_raddr_o = rs1;
-                            reg2_raddr_o = rs2;
-                            op1_o = reg1_rdata_i;
-                            op2_o = reg2_rdata_i;
-                        end
-                        default: begin
-                            reg_we_o = `WriteDisable;
-                            reg_waddr_o = `ZeroReg;
-                            reg1_raddr_o = `ZeroReg;
-                            reg2_raddr_o = `ZeroReg;
-                        end
-                    endcase
-                end else if (funct7 == 7'b0000001) begin
-                    case (funct3)
-                        `INST_MUL, `INST_MULHU, `INST_MULH, `INST_MULHSU: begin
-                            reg_we_o = `WriteEnable;
-                            reg_waddr_o = rd;
-                            reg1_raddr_o = rs1;
-                            reg2_raddr_o = rs2;
-                            op1_o = reg1_rdata_i;
-                            op2_o = reg2_rdata_i;
-                        end
-                        `INST_DIV, `INST_DIVU, `INST_REM, `INST_REMU: begin
-                            reg_we_o = `WriteDisable;
-                            reg_waddr_o = rd;
-                            reg1_raddr_o = rs1;
-                            reg2_raddr_o = rs2;
-                            op1_o = reg1_rdata_i;
-                            op2_o = reg2_rdata_i;
-                            op1_jump_o = inst_addr_i;
-                            op2_jump_o = 32'h4;
-                        end
-                        default: begin
-                            reg_we_o = `WriteDisable;
-                            reg_waddr_o = `ZeroReg;
-                            reg1_raddr_o = `ZeroReg;
-                            reg2_raddr_o = `ZeroReg;
-                        end
-                    endcase
-                end else begin
-                    reg_we_o = `WriteDisable;
-                    reg_waddr_o = `ZeroReg;
-                    reg1_raddr_o = `ZeroReg;
-                    reg2_raddr_o = `ZeroReg;
-                end
-            end
-            `INST_TYPE_L: begin
-                case (funct3)
-                    `INST_LB, `INST_LH, `INST_LW, `INST_LBU, `INST_LHU: begin
-                        reg1_raddr_o = rs1;
-                        reg2_raddr_o = `ZeroReg;
-                        reg_we_o = `WriteEnable;
-                        reg_waddr_o = rd;
-                        op1_o = reg1_rdata_i;
-                        op2_o = {{20{inst_i[31]}}, inst_i[31:20]};
-                    end
-                    default: begin
-                        reg1_raddr_o = `ZeroReg;
-                        reg2_raddr_o = `ZeroReg;
-                        reg_we_o = `WriteDisable;
-                        reg_waddr_o = `ZeroReg;
-                    end
-                endcase
-            end
-            `INST_TYPE_S: begin
-                case (funct3)
-                    `INST_SB, `INST_SW, `INST_SH: begin
-                        reg1_raddr_o = rs1;
-                        reg2_raddr_o = rs2;
-                        reg_we_o = `WriteDisable;
-                        reg_waddr_o = `ZeroReg;
-                        op1_o = reg1_rdata_i;
-                        op2_o = {{20{inst_i[31]}}, inst_i[31:25], inst_i[11:7]};
-                    end
-                    default: begin
-                        reg1_raddr_o = `ZeroReg;
-                        reg2_raddr_o = `ZeroReg;
-                        reg_we_o = `WriteDisable;
-                        reg_waddr_o = `ZeroReg;
-                    end
-                endcase
-            end
-            `INST_TYPE_B: begin
-                case (funct3)
-                    `INST_BEQ, `INST_BNE, `INST_BLT, `INST_BGE, `INST_BLTU, `INST_BGEU: begin
-                        reg1_raddr_o = rs1;
-                        reg2_raddr_o = rs2;
-                        reg_we_o = `WriteDisable;
-                        reg_waddr_o = `ZeroReg;
-                        op1_o = reg1_rdata_i;
-                        op2_o = reg2_rdata_i;
-                        op1_jump_o = inst_addr_i;
-                        op2_jump_o = {{20{inst_i[31]}}, inst_i[7], inst_i[30:25], inst_i[11:8], 1'b0};
-                    end
-                    default: begin
-                        reg1_raddr_o = `ZeroReg;
-                        reg2_raddr_o = `ZeroReg;
-                        reg_we_o = `WriteDisable;
-                        reg_waddr_o = `ZeroReg;
-                    end
-                endcase
-            end
-            `INST_JAL: begin
-                reg_we_o = `WriteEnable;
-                reg_waddr_o = rd;
-                reg1_raddr_o = `ZeroReg;
-                reg2_raddr_o = `ZeroReg;
-                op1_o = inst_addr_i;
-                op2_o = 32'h4;
-                op1_jump_o = inst_addr_i;
-                op2_jump_o = {{12{inst_i[31]}}, inst_i[19:12], inst_i[20], inst_i[30:21], 1'b0};
-            end
-            `INST_JALR: begin
-                reg_we_o = `WriteEnable;
-                reg1_raddr_o = rs1;
-                reg2_raddr_o = `ZeroReg;
-                reg_waddr_o = rd;
-                op1_o = inst_addr_i;
-                op2_o = 32'h4;
-                op1_jump_o = reg1_rdata_i;
-                op2_jump_o = {{20{inst_i[31]}}, inst_i[31:20]};
-            end
-            `INST_LUI: begin
-                reg_we_o = `WriteEnable;
-                reg_waddr_o = rd;
-                reg1_raddr_o = `ZeroReg;
-                reg2_raddr_o = `ZeroReg;
-                op1_o = {inst_i[31:12], 12'b0};
-                op2_o = `ZeroWord;
-            end
-            `INST_AUIPC: begin
-                reg_we_o = `WriteEnable;
-                reg_waddr_o = rd;
-                reg1_raddr_o = `ZeroReg;
-                reg2_raddr_o = `ZeroReg;
-                op1_o = inst_addr_i;
-                op2_o = {inst_i[31:12], 12'b0};
-            end
-            `INST_NOP_OP: begin
-                reg_we_o = `WriteDisable;
-                reg_waddr_o = `ZeroReg;
-                reg1_raddr_o = `ZeroReg;
-                reg2_raddr_o = `ZeroReg;
-            end
-            `INST_FENCE: begin
-                reg_we_o = `WriteDisable;
-                reg_waddr_o = `ZeroReg;
-                reg1_raddr_o = `ZeroReg;
-                reg2_raddr_o = `ZeroReg;
-                op1_jump_o = inst_addr_i;
-                op2_jump_o = 32'h4;
-            end
-            `INST_CSR: begin
-                reg_we_o = `WriteDisable;
-                reg_waddr_o = `ZeroReg;
-                reg1_raddr_o = `ZeroReg;
-                reg2_raddr_o = `ZeroReg;
-                csr_raddr_o = {20'h0, inst_i[31:20]};
-                csr_waddr_o = {20'h0, inst_i[31:20]};
-                case (funct3)
-                    `INST_CSRRW, `INST_CSRRS, `INST_CSRRC: begin
-                        reg1_raddr_o = rs1;
-                        reg2_raddr_o = `ZeroReg;
-                        reg_we_o = `WriteEnable;
-                        reg_waddr_o = rd;
-                        csr_we_o = `WriteEnable;
-                    end
-                    `INST_CSRRWI, `INST_CSRRSI, `INST_CSRRCI: begin
-                        reg1_raddr_o = `ZeroReg;
-                        reg2_raddr_o = `ZeroReg;
-                        reg_we_o = `WriteEnable;
-                        reg_waddr_o = rd;
-                        csr_we_o = `WriteEnable;
-                    end
-                    default: begin
-                        reg_we_o = `WriteDisable;
-                        reg_waddr_o = `ZeroReg;
-                        reg1_raddr_o = `ZeroReg;
-                        reg2_raddr_o = `ZeroReg;
-                        csr_we_o = `WriteDisable;
-                    end
-                endcase
-            end
-            default: begin
-                reg_we_o = `WriteDisable;
-                reg_waddr_o = `ZeroReg;
-                reg1_raddr_o = `ZeroReg;
-                reg2_raddr_o = `ZeroReg;
-            end
-        endcase
-    end
-
-endmodule

rtl/core/id_ex.v

@@ -1,111 +0,0 @@
- /*                                                                      
- Copyright 2020 Blue Liang, liangkangnan@163.com
-                                                                         
- Licensed under the Apache License, Version 2.0 (the "License");         
- you may not use this file except in compliance with the License.        
- You may obtain a copy of the License at                                 
-                                                                         
-     http://www.apache.org/licenses/LICENSE-2.0                          
-                                                                         
- Unless required by applicable law or agreed to in writing, software    
- distributed under the License is distributed on an "AS IS" BASIS,       
- WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- See the License for the specific language governing permissions and     
- limitations under the License.                                          
- */
-
-`include "defines.v"
-
-// 将译码结果向执行模块传递
-module id_ex(
-
-    input wire clk,
-    input wire rst,
-
-    input wire[`InstBus] inst_i,            // 指令内容
-    input wire[`InstAddrBus] inst_addr_i,   // 指令地址
-    input wire reg_we_i,                    // 写通用寄存器标志
-    input wire[`RegAddrBus] reg_waddr_i,    // 写通用寄存器地址
-    input wire[`RegBus] reg1_rdata_i,       // 通用寄存器1读数据
-    input wire[`RegBus] reg2_rdata_i,       // 通用寄存器2读数据
-    input wire csr_we_i,                    // 写CSR寄存器标志
-    input wire[`MemAddrBus] csr_waddr_i,    // 写CSR寄存器地址
-    input wire[`RegBus] csr_rdata_i,        // CSR寄存器读数据
-    input wire[`MemAddrBus] op1_i,
-    input wire[`MemAddrBus] op2_i,
-    input wire[`MemAddrBus] op1_jump_i,
-    input wire[`MemAddrBus] op2_jump_i,
-
-    input wire[`Hold_Flag_Bus] hold_flag_i, // 流水线暂停标志
-
-    output wire[`MemAddrBus] op1_o,
-    output wire[`MemAddrBus] op2_o,
-    output wire[`MemAddrBus] op1_jump_o,
-    output wire[`MemAddrBus] op2_jump_o,
-    output wire[`InstBus] inst_o,            // 指令内容
-    output wire[`InstAddrBus] inst_addr_o,   // 指令地址
-    output wire reg_we_o,                    // 写通用寄存器标志
-    output wire[`RegAddrBus] reg_waddr_o,    // 写通用寄存器地址
-    output wire[`RegBus] reg1_rdata_o,       // 通用寄存器1读数据
-    output wire[`RegBus] reg2_rdata_o,       // 通用寄存器2读数据
-    output wire csr_we_o,                    // 写CSR寄存器标志
-    output wire[`MemAddrBus] csr_waddr_o,    // 写CSR寄存器地址
-    output wire[`RegBus] csr_rdata_o         // CSR寄存器读数据
-
-    );
-
-    wire hold_en = (hold_flag_i >= `Hold_Id);
-
-    wire[`InstBus] inst;
-    gen_pipe_dff #(32) inst_ff(clk, rst, hold_en, `INST_NOP, inst_i, inst);
-    assign inst_o = inst;
-
-    wire[`InstAddrBus] inst_addr;
-    gen_pipe_dff #(32) inst_addr_ff(clk, rst, hold_en, `ZeroWord, inst_addr_i, inst_addr);
-    assign inst_addr_o = inst_addr;
-
-    wire reg_we;
-    gen_pipe_dff #(1) reg_we_ff(clk, rst, hold_en, `WriteDisable, reg_we_i, reg_we);
-    assign reg_we_o = reg_we;
-
-    wire[`RegAddrBus] reg_waddr;
-    gen_pipe_dff #(5) reg_waddr_ff(clk, rst, hold_en, `ZeroReg, reg_waddr_i, reg_waddr);
-    assign reg_waddr_o = reg_waddr;
-
-    wire[`RegBus] reg1_rdata;
-    gen_pipe_dff #(32) reg1_rdata_ff(clk, rst, hold_en, `ZeroWord, reg1_rdata_i, reg1_rdata);
-    assign reg1_rdata_o = reg1_rdata;
-
-    wire[`RegBus] reg2_rdata;
-    gen_pipe_dff #(32) reg2_rdata_ff(clk, rst, hold_en, `ZeroWord, reg2_rdata_i, reg2_rdata);
-    assign reg2_rdata_o = reg2_rdata;
-
-    wire csr_we;
-    gen_pipe_dff #(1) csr_we_ff(clk, rst, hold_en, `WriteDisable, csr_we_i, csr_we);
-    assign csr_we_o = csr_we;
-
-    wire[`MemAddrBus] csr_waddr;
-    gen_pipe_dff #(32) csr_waddr_ff(clk, rst, hold_en, `ZeroWord, csr_waddr_i, csr_waddr);
-    assign csr_waddr_o = csr_waddr;
-
-    wire[`RegBus] csr_rdata;
-    gen_pipe_dff #(32) csr_rdata_ff(clk, rst, hold_en, `ZeroWord, csr_rdata_i, csr_rdata);
-    assign csr_rdata_o = csr_rdata;
-
-    wire[`MemAddrBus] op1;
-    gen_pipe_dff #(32) op1_ff(clk, rst, hold_en, `ZeroWord, op1_i, op1);
-    assign op1_o = op1;
-
-    wire[`MemAddrBus] op2;
-    gen_pipe_dff #(32) op2_ff(clk, rst, hold_en, `ZeroWord, op2_i, op2);
-    assign op2_o = op2;
-
-    wire[`MemAddrBus] op1_jump;
-    gen_pipe_dff #(32) op1_jump_ff(clk, rst, hold_en, `ZeroWord, op1_jump_i, op1_jump);
-    assign op1_jump_o = op1_jump;
-
-    wire[`MemAddrBus] op2_jump;
-    gen_pipe_dff #(32) op2_jump_ff(clk, rst, hold_en, `ZeroWord, op2_jump_i, op2_jump);
-    assign op2_jump_o = op2_jump;
-
-endmodule

rtl/core/idu.sv

@@ -0,0 +1,316 @@
+ /*                                                                      
+ Copyright 2019 Blue Liang, liangkangnan@163.com
+                                                                         
+ Licensed under the Apache License, Version 2.0 (the "License");         
+ you may not use this file except in compliance with the License.        
+ You may obtain a copy of the License at                                 
+                                                                         
+     http://www.apache.org/licenses/LICENSE-2.0                          
+                                                                         
+ Unless required by applicable law or agreed to in writing, software    
+ distributed under the License is distributed on an "AS IS" BASIS,       
+ WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ See the License for the specific language governing permissions and     
+ limitations under the License.                                          
+ */
+
+`include "defines.sv"
+
+// 译码模块
+// 纯组合逻辑电路
+module idu(
+
+    input wire clk,                                     // 时钟
+    input wire rst_n,                                   // 复位
+
+    // from ifu_idu
+    input wire[31:0] inst_i,                            // 指令内容
+    input wire[31:0] inst_addr_i,                       // 指令地址
+    input wire inst_valid_i,                            // 指令有效
+
+    // from gpr_reg
+    input wire[31:0] rs1_rdata_i,                       // 通用寄存器1输入数据
+    input wire[31:0] rs2_rdata_i,                       // 通用寄存器2输入数据
+
+    output wire stall_o,                                // 流水线暂停
+    output wire illegal_inst_o,                         // 非法指令
+
+    // to gpr_reg
+    output wire[4:0] rs1_raddr_o,                       // 寄存器1地址
+    output wire[4:0] rs2_raddr_o,                       // 寄存器2地址
+
+    // to idu_exu
+    output wire inst_valid_o,                           // 指令有效
+    output wire[31:0] inst_o,                           // 指令内容
+    output wire[`DECINFO_WIDTH-1:0] dec_info_bus_o,     // 译码信息
+    output wire[31:0] dec_imm_o,                        // 立即数
+    output wire[31:0] dec_pc_o,                         // 指令地址
+    output wire[31:0] rs1_rdata_o,                      // 寄存器1数据
+    output wire[31:0] rs2_rdata_o,                      // 寄存器2数据
+    output wire[4:0] rd_waddr_o,                        // 写寄存器地址
+    output wire rd_we_o                                 // 写寄存器使能
+
+    );
+
+    wire[31:0] inst = inst_valid_i? inst_i: `INST_NOP;
+
+    assign inst_valid_o = inst_valid_i;
+    assign inst_o = inst;
+    assign rs1_rdata_o = rs1_rdata_i;
+    assign rs2_rdata_o = rs2_rdata_i;
+
+    // 取出指令中的每一个域
+    wire[6:0] opcode = inst[6:0];
+    wire[2:0] funct3 = inst[14:12];
+    wire[6:0] funct7 = inst[31:25];
+    wire[4:0] rd = inst[11:7];
+    wire[4:0] rs1 = inst[19:15];
+    wire[4:0] rs2 = inst[24:20];
+    wire[11:0] type_i_imm_11_0 = inst[31:20];
+    wire[6:0] type_s_imm_11_5 = inst[31:25];
+    wire[4:0] type_s_imm_4_0 = inst[11:7];
+    wire[6:0] type_b_imm_12_10_5 = inst[31:25];
+    wire[4:0] type_b_imm_4_1_11 = inst[11:7];
+    wire[19:0] type_u_imm_31_12 = inst[31:12];
+    wire[19:0] type_j_imm_31_12 = inst[31:12];
+
+    // 指令opcode域的取值
+    wire opcode_0110111 = (opcode == 7'b0110111);
+    wire opcode_0010111 = (opcode == 7'b0010111);
+    wire opcode_1101111 = (opcode == 7'b1101111);
+    wire opcode_1100111 = (opcode == 7'b1100111);
+    wire opcode_1100011 = (opcode == 7'b1100011);
+    wire opcode_0000011 = (opcode == 7'b0000011);
+    wire opcode_0100011 = (opcode == 7'b0100011);
+    wire opcode_0010011 = (opcode == 7'b0010011);
+    wire opcode_0110011 = (opcode == 7'b0110011);
+    wire opcode_0001111 = (opcode == 7'b0001111);
+    wire opcode_1110011 = (opcode == 7'b1110011);
+
+    // 指令funct3域的取值
+    wire funct3_000 = (funct3 == 3'b000);
+    wire funct3_001 = (funct3 == 3'b001);
+    wire funct3_010 = (funct3 == 3'b010);
+    wire funct3_011 = (funct3 == 3'b011);
+    wire funct3_100 = (funct3 == 3'b100);
+    wire funct3_101 = (funct3 == 3'b101);
+    wire funct3_110 = (funct3 == 3'b110);
+    wire funct3_111 = (funct3 == 3'b111);
+
+    // 指令funct7域的取值
+    wire funct7_0000000 = (funct7 == 7'b0000000);
+    wire funct7_0100000 = (funct7 == 7'b0100000);
+    wire funct7_0000001 = (funct7 == 7'b0000001);
+
+    // I类型指令imm域的取值
+    wire type_i_imm_000000000000 = (type_i_imm_11_0 == 12'b000000000000);
+    wire type_i_imm_000000000001 = (type_i_imm_11_0 == 12'b000000000001);
+
+    // 译码出具体指令
+    wire inst_lui = opcode_0110111;
+    wire inst_auipc = opcode_0010111;
+    wire inst_jal = opcode_1101111;
+    wire inst_jalr = opcode_1100111 & funct3_000;
+    wire inst_beq = opcode_1100011 & funct3_000;
+    wire inst_bne = opcode_1100011 & funct3_001;
+    wire inst_blt = opcode_1100011 & funct3_100;
+    wire inst_bge = opcode_1100011 & funct3_101;
+    wire inst_bltu = opcode_1100011 & funct3_110;
+    wire inst_bgeu = opcode_1100011 & funct3_111;
+    wire inst_lb = opcode_0000011 & funct3_000;
+    wire inst_lh = opcode_0000011 & funct3_001;
+    wire inst_lw = opcode_0000011 & funct3_010;
+    wire inst_lbu = opcode_0000011 & funct3_100;
+    wire inst_lhu = opcode_0000011 & funct3_101;
+    wire inst_sb = opcode_0100011 & funct3_000;
+    wire inst_sh = opcode_0100011 & funct3_001;
+    wire inst_sw = opcode_0100011 & funct3_010;
+    wire inst_addi = opcode_0010011 & funct3_000;
+    wire inst_slti = opcode_0010011 & funct3_010;
+    wire inst_sltiu = opcode_0010011 & funct3_011;
+    wire inst_xori = opcode_0010011 & funct3_100;
+    wire inst_ori = opcode_0010011 & funct3_110;
+    wire inst_andi = opcode_0010011 & funct3_111;
+    wire inst_slli = opcode_0010011 & funct3_001 & funct7_0000000;
+    wire inst_srli = opcode_0010011 & funct3_101 & funct7_0000000;
+    wire inst_srai = opcode_0010011 & funct3_101 & funct7_0100000;
+    wire inst_add = opcode_0110011 & funct3_000 & funct7_0000000;
+    wire inst_sub = opcode_0110011 & funct3_000 & funct7_0100000;
+    wire inst_sll = opcode_0110011 & funct3_001 & funct7_0000000;
+    wire inst_slt = opcode_0110011 & funct3_010 & funct7_0000000;
+    wire inst_sltu = opcode_0110011 & funct3_011 & funct7_0000000;
+    wire inst_xor = opcode_0110011 & funct3_100 & funct7_0000000;
+    wire inst_srl = opcode_0110011 & funct3_101 & funct7_0000000;
+    wire inst_sra = opcode_0110011 & funct3_101 & funct7_0100000;
+    wire inst_or = opcode_0110011 & funct3_110 & funct7_0000000;
+    wire inst_and = opcode_0110011 & funct3_111 & funct7_0000000;
+    wire inst_fence = opcode_0001111 & funct3_000;
+    wire inst_ecall = (inst == `INST_ECALL);
+    wire inst_ebreak = (inst == `INST_EBREAK);
+    wire inst_fence_i = opcode_0001111 & funct3_001;
+    wire inst_csrrw = opcode_1110011 & funct3_001;
+    wire inst_csrrs = opcode_1110011 & funct3_010;
+    wire inst_csrrc = opcode_1110011 & funct3_011;
+    wire inst_csrrwi = opcode_1110011 & funct3_101;
+    wire inst_csrrsi = opcode_1110011 & funct3_110;
+    wire inst_csrrci = opcode_1110011 & funct3_111;
+    wire inst_mul = opcode_0110011 & funct3_000 & funct7_0000001;
+    wire inst_mulh = opcode_0110011 & funct3_001 & funct7_0000001;
+    wire inst_mulhsu = opcode_0110011 & funct3_010 & funct7_0000001;
+    wire inst_mulhu = opcode_0110011 & funct3_011 & funct7_0000001;
+    wire inst_div = opcode_0110011 & funct3_100 & funct7_0000001;
+    wire inst_divu = opcode_0110011 & funct3_101 & funct7_0000001;
+    wire inst_rem = opcode_0110011 & funct3_110 & funct7_0000001;
+    wire inst_remu = opcode_0110011 & funct3_111 & funct7_0000001;
+    wire inst_nop = (inst == `INST_NOP);
+    wire inst_mret = (inst == `INST_MRET);
+    wire inst_dret = (inst == `INST_DRET);
+
+    // 将指令分类
+    wire inst_type_load = opcode_0000011;
+    wire inst_type_store = opcode_0100011;
+    wire inst_type_branch = opcode_1100011;
+    wire inst_type_muldiv = inst_mul | inst_mulh | inst_mulhsu | inst_mulhu | inst_div | inst_divu | inst_rem | inst_remu;
+    wire inst_type_div = inst_div | inst_divu | inst_rem | inst_remu;
+
+    wire[`DECINFO_ALU_BUS_WIDTH-1:0] dec_alu_info_bus;
+    assign dec_alu_info_bus[`DECINFO_GRP_BUS] = `DECINFO_GRP_ALU;
+    assign dec_alu_info_bus[`DECINFO_ALU_LUI] = inst_lui;
+    assign dec_alu_info_bus[`DECINFO_ALU_AUIPC] = inst_auipc;
+    assign dec_alu_info_bus[`DECINFO_ALU_ADD] = inst_add | inst_addi;
+    assign dec_alu_info_bus[`DECINFO_ALU_SUB] = inst_sub;
+    assign dec_alu_info_bus[`DECINFO_ALU_SLL] = inst_sll | inst_slli;
+    assign dec_alu_info_bus[`DECINFO_ALU_SLT] = inst_slt | inst_slti;
+    assign dec_alu_info_bus[`DECINFO_ALU_SLTU] = inst_sltu | inst_sltiu;
+    assign dec_alu_info_bus[`DECINFO_ALU_XOR] = inst_xor | inst_xori;
+    assign dec_alu_info_bus[`DECINFO_ALU_SRL] = inst_srl | inst_srli;
+    assign dec_alu_info_bus[`DECINFO_ALU_SRA] = inst_sra | inst_srai;
+    assign dec_alu_info_bus[`DECINFO_ALU_OR] = inst_or | inst_ori;
+    assign dec_alu_info_bus[`DECINFO_ALU_AND] = inst_and | inst_andi;
+    assign dec_alu_info_bus[`DECINFO_ALU_OP2IMM] = opcode_0010011 | inst_lui | inst_auipc;
+    assign dec_alu_info_bus[`DECINFO_ALU_OP1PC] = inst_auipc;
+
+    wire[`DECINFO_BJP_BUS_WIDTH-1:0] dec_bjp_info_bus;
+    assign dec_bjp_info_bus[`DECINFO_GRP_BUS] = `DECINFO_GRP_BJP;
+    assign dec_bjp_info_bus[`DECINFO_BJP_JUMP] = inst_jal | inst_jalr;
+    assign dec_bjp_info_bus[`DECINFO_BJP_BEQ] = inst_beq;
+    assign dec_bjp_info_bus[`DECINFO_BJP_BNE] = inst_bne;
+    assign dec_bjp_info_bus[`DECINFO_BJP_BLT] = inst_blt;
+    assign dec_bjp_info_bus[`DECINFO_BJP_BGE] = inst_bge;
+    assign dec_bjp_info_bus[`DECINFO_BJP_BLTU] = inst_bltu;
+    assign dec_bjp_info_bus[`DECINFO_BJP_BGEU] = inst_bgeu;
+    assign dec_bjp_info_bus[`DECINFO_BJP_OP1RS1] = inst_jalr;
+
+    wire[`DECINFO_MULDIV_BUS_WIDTH-1:0] dec_muldiv_info_bus;
+    assign dec_muldiv_info_bus[`DECINFO_GRP_BUS] = `DECINFO_GRP_MULDIV;
+    assign dec_muldiv_info_bus[`DECINFO_MULDIV_MUL] = inst_mul;
+    assign dec_muldiv_info_bus[`DECINFO_MULDIV_MULH] = inst_mulh;
+    assign dec_muldiv_info_bus[`DECINFO_MULDIV_MULHSU] = inst_mulhsu;
+    assign dec_muldiv_info_bus[`DECINFO_MULDIV_MULHU] = inst_mulhu;
+    assign dec_muldiv_info_bus[`DECINFO_MULDIV_DIV] = inst_div;
+    assign dec_muldiv_info_bus[`DECINFO_MULDIV_DIVU] = inst_divu;
+    assign dec_muldiv_info_bus[`DECINFO_MULDIV_REM] = inst_rem;
+    assign dec_muldiv_info_bus[`DECINFO_MULDIV_REMU] = inst_remu;
+
+    wire[`DECINFO_CSR_BUS_WIDTH-1:0] dec_csr_info_bus;
+    assign dec_csr_info_bus[`DECINFO_GRP_BUS] = `DECINFO_GRP_CSR;
+    assign dec_csr_info_bus[`DECINFO_CSR_CSRRW] = inst_csrrw | inst_csrrwi;
+    assign dec_csr_info_bus[`DECINFO_CSR_CSRRS] = inst_csrrs | inst_csrrsi;
+    assign dec_csr_info_bus[`DECINFO_CSR_CSRRC] = inst_csrrc | inst_csrrci;
+    assign dec_csr_info_bus[`DECINFO_CSR_RS1IMM] = inst_csrrwi | inst_csrrsi | inst_csrrci;
+    assign dec_csr_info_bus[`DECINFO_CSR_CSRADDR] = inst[31:20];
+
+    wire[`DECINFO_MEM_BUS_WIDTH-1:0] dec_mem_info_bus;
+    assign dec_mem_info_bus[`DECINFO_GRP_BUS] = `DECINFO_GRP_MEM;
+    assign dec_mem_info_bus[`DECINFO_MEM_LB] = inst_lb;
+    assign dec_mem_info_bus[`DECINFO_MEM_LH] = inst_lh;
+    assign dec_mem_info_bus[`DECINFO_MEM_LW] = inst_lw;
+    assign dec_mem_info_bus[`DECINFO_MEM_LBU] = inst_lbu;
+    assign dec_mem_info_bus[`DECINFO_MEM_LHU] = inst_lhu;
+    assign dec_mem_info_bus[`DECINFO_MEM_SB] = inst_sb;
+    assign dec_mem_info_bus[`DECINFO_MEM_SH] = inst_sh;
+    assign dec_mem_info_bus[`DECINFO_MEM_SW] = inst_sw;
+
+    wire[`DECINFO_SYS_BUS_WIDTH-1:0] dec_sys_info_bus;
+    assign dec_sys_info_bus[`DECINFO_GRP_BUS] = `DECINFO_GRP_SYS;
+    assign dec_sys_info_bus[`DECINFO_SYS_ECALL] = inst_ecall;
+    assign dec_sys_info_bus[`DECINFO_SYS_EBREAK] = inst_ebreak;
+    assign dec_sys_info_bus[`DECINFO_SYS_NOP] = inst_nop;
+    assign dec_sys_info_bus[`DECINFO_SYS_MRET] = inst_mret;
+    assign dec_sys_info_bus[`DECINFO_SYS_DRET] = inst_dret;
+    assign dec_sys_info_bus[`DECINFO_SYS_FENCE] = inst_fence | inst_fence_i;
+
+    // 指令中的立即数
+    wire[31:0] inst_u_type_imm = {inst[31:12], 12'b0};
+    wire[31:0] inst_j_type_imm = {{12{inst[31]}}, inst[19:12], inst[20], inst[30:21], 1'b0};
+    wire[31:0] inst_b_type_imm = {{20{inst[31]}}, inst[7], inst[30:25], inst[11:8], 1'b0};
+    wire[31:0] inst_s_type_imm = {{20{inst[31]}}, inst[31:25], inst[11:7]};
+    wire[31:0] inst_i_type_imm = {{20{inst[31]}}, inst[31:20]};
+    wire[31:0] inst_csr_type_imm = {27'h0, inst[19:15]};
+    wire[31:0] inst_shift_type_imm = {27'h0, inst[24:20]};
+
+    wire inst_sel_u_imm = inst_lui | inst_auipc;
+    wire inst_sel_j_imm = inst_jal;
+    wire inst_sel_b_imm = inst_type_branch;
+    wire inst_sel_s_imm = inst_type_store;
+    wire inst_sel_i_imm = inst_addi | inst_slti | inst_sltiu | inst_xori | inst_ori | inst_andi | inst_type_load | inst_jalr;
+    wire inst_sel_csr_imm = inst_csrrwi | inst_csrrsi | inst_csrrci;
+    wire inst_sel_shift_imm = inst_slli | inst_srli | inst_srai;
+
+    assign dec_imm_o = ({32{inst_sel_u_imm}} & inst_u_type_imm) |
+                       ({32{inst_sel_j_imm}} & inst_j_type_imm) |
+                       ({32{inst_sel_b_imm}} & inst_b_type_imm) |
+                       ({32{inst_sel_s_imm}} & inst_s_type_imm) |
+                       ({32{inst_sel_i_imm}} & inst_i_type_imm) |
+                       ({32{inst_sel_csr_imm}} & inst_csr_type_imm) |
+                       ({32{inst_sel_shift_imm}} & inst_shift_type_imm);
+
+    wire op_alu = inst_lui | inst_auipc | opcode_0010011 | (opcode_0110011 & (~inst_type_muldiv));
+    wire op_bjp = inst_jal | inst_jalr | inst_type_branch;
+    wire op_muldiv = inst_type_muldiv;
+    wire op_csr = inst_csrrw | inst_csrrwi | inst_csrrs | inst_csrrsi | inst_csrrc | inst_csrrci;
+    wire op_sys = inst_ebreak | inst_ecall | inst_nop | inst_mret | inst_fence | inst_fence_i | inst_dret;
+    wire op_mem = inst_type_load | inst_type_store;
+
+    assign dec_info_bus_o = ({`DECINFO_WIDTH{op_alu}} & {{`DECINFO_WIDTH-`DECINFO_ALU_BUS_WIDTH{1'b0}}, dec_alu_info_bus}) |
+                            ({`DECINFO_WIDTH{op_bjp}} & {{`DECINFO_WIDTH-`DECINFO_BJP_BUS_WIDTH{1'b0}}, dec_bjp_info_bus}) |
+                            ({`DECINFO_WIDTH{op_muldiv}} & {{`DECINFO_WIDTH-`DECINFO_MULDIV_BUS_WIDTH{1'b0}}, dec_muldiv_info_bus}) |
+                            ({`DECINFO_WIDTH{op_csr}} & {{`DECINFO_WIDTH-`DECINFO_CSR_BUS_WIDTH{1'b0}}, dec_csr_info_bus}) |
+                            ({`DECINFO_WIDTH{op_mem}} & {{`DECINFO_WIDTH-`DECINFO_MEM_BUS_WIDTH{1'b0}}, dec_mem_info_bus}) |
+                            ({`DECINFO_WIDTH{op_sys}} & {{`DECINFO_WIDTH-`DECINFO_SYS_BUS_WIDTH{1'b0}}, dec_sys_info_bus});
+
+    assign dec_pc_o = inst_addr_i;
+
+    // 是否需要访问rs1寄存器
+    wire access_rs1 = (~inst_lui) &
+                      (~inst_auipc) &
+                      (~inst_jal) &
+                      (~inst_ecall) &
+                      (~inst_ebreak) &
+                      (~inst_csrrwi) &
+                      (~inst_csrrsi) &
+                      (~inst_csrrci) &
+                      (~inst_nop) &
+                      (~inst_fence) &
+                      (~inst_fence_i) &
+                      (~inst_mret);
+
+    assign rs1_raddr_o = access_rs1? rs1: 5'h0;
+
+    // 是否需要访问rs2寄存器
+    wire access_rs2 = opcode_0110011 | inst_type_store | inst_type_branch;
+
+    assign rs2_raddr_o = access_rs2? rs2: 5'h0;
+
+    // 是否需要访问rd寄存器
+    wire access_rd = inst_lui | inst_auipc | inst_jal | inst_jalr | inst_type_load | opcode_0010011 | opcode_0110011 | op_csr;
+
+    assign rd_waddr_o = access_rd? rd: 5'h0;
+    assign rd_we_o = access_rd;
+
+    assign stall_o = 1'b0;
+
+    //assign illegal_inst_o = ~(|dec_info_bus_o);
+    assign illegal_inst_o = 1'b0;
+
+endmodule

rtl/core/idu_exu.sv

@@ -0,0 +1,99 @@
+ /*                                                                      
+ Copyright 2020 Blue Liang, liangkangnan@163.com
+                                                                         
+ Licensed under the Apache License, Version 2.0 (the "License");         
+ you may not use this file except in compliance with the License.        
+ You may obtain a copy of the License at                                 
+                                                                         
+     http://www.apache.org/licenses/LICENSE-2.0                          
+                                                                         
+ Unless required by applicable law or agreed to in writing, software    
+ distributed under the License is distributed on an "AS IS" BASIS,       
+ WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ See the License for the specific language governing permissions and     
+ limitations under the License.                                          
+ */
+
+`include "defines.sv"
+
+// 将译码结果向执行模块传递
+module idu_exu(
+
+    input wire clk,                           // 时钟
+    input wire rst_n,                         // 复位
+
+    input wire[`STALL_WIDTH-1:0] stall_i,     // 流水线暂停
+    input wire flush_i,                       // 流水线冲刷
+
+    // 输入
+    input wire[31:0] inst_i,
+    input wire inst_valid_i,
+    input wire[`DECINFO_WIDTH-1:0] dec_info_bus_i,
+    input wire[31:0] dec_imm_i,
+    input wire[31:0] dec_pc_i,
+    input wire[31:0] rs1_rdata_i,
+    input wire[31:0] rs2_rdata_i,
+    input wire[4:0] rd_waddr_i,
+    input wire rd_we_i,
+
+    // 输出
+    output wire[31:0] inst_o,
+    output wire inst_valid_o,
+    output wire[`DECINFO_WIDTH-1:0] dec_info_bus_o,
+    output wire[31:0] dec_imm_o,
+    output wire[31:0] dec_pc_o,
+    output wire[31:0] rs1_rdata_o,
+    output wire[31:0] rs2_rdata_o,
+    output wire[4:0] rd_waddr_o,
+    output wire rd_we_o
+
+    );
+
+    wire en = (~stall_i[`STALL_EX]) | flush_i;
+
+    wire[`DECINFO_WIDTH-1:0] i_dec_info_bus = flush_i? {`DECINFO_WIDTH{1'b0}}: dec_info_bus_i;
+    wire[`DECINFO_WIDTH-1:0] dec_info_bus;
+    gen_en_dff #(`DECINFO_WIDTH) info_bus_ff(clk, rst_n, en, i_dec_info_bus, dec_info_bus);
+    assign dec_info_bus_o = dec_info_bus;
+
+    wire[31:0] i_dec_imm = flush_i? 32'h0: dec_imm_i;
+    wire[31:0] dec_imm;
+    gen_en_dff #(32) imm_ff(clk, rst_n, en, i_dec_imm, dec_imm);
+    assign dec_imm_o = dec_imm;
+
+    wire[31:0] i_dec_pc = flush_i? 32'h0: dec_pc_i;
+    wire[31:0] dec_pc;
+    gen_en_dff #(32) pc_ff(clk, rst_n, en, i_dec_pc, dec_pc);
+    assign dec_pc_o = dec_pc;
+
+    wire[31:0] i_rs1_rdata = flush_i? 32'h0: rs1_rdata_i;
+    wire[31:0] rs1_rdata;
+    gen_en_dff #(32) rs1_rdata_ff(clk, rst_n, en, i_rs1_rdata, rs1_rdata);
+    assign rs1_rdata_o = rs1_rdata;
+
+    wire[31:0] i_rs2_rdata = flush_i? 32'h0: rs2_rdata_i;
+    wire[31:0] rs2_rdata;
+    gen_en_dff #(32) rs2_rdata_ff(clk, rst_n, en, i_rs2_rdata, rs2_rdata);
+    assign rs2_rdata_o = rs2_rdata;
+
+    wire[4:0] i_rd_waddr = flush_i? 5'h0: rd_waddr_i;
+    wire[4:0] rd_waddr;
+    gen_en_dff #(5) rd_waddr_ff(clk, rst_n, en, i_rd_waddr, rd_waddr);
+    assign rd_waddr_o = rd_waddr;
+
+    wire i_rd_we = flush_i? 1'b0: rd_we_i;
+    wire rd_we;
+    gen_en_dff #(1) rd_we_ff(clk, rst_n, en, i_rd_we, rd_we);
+    assign rd_we_o = rd_we;
+
+    wire[31:0] i_inst = flush_i? `INST_NOP: inst_i;
+    wire[31:0] inst;
+    gen_en_dff #(32) inst_ff(clk, rst_n, en, i_inst, inst);
+    assign inst_o = inst;
+
+    wire i_inst_valid = flush_i? 1'b0: inst_valid_i;
+    wire inst_valid;
+    gen_en_dff #(1) inst_valid_ff(clk, rst_n, en, i_inst_valid, inst_valid);
+    assign inst_valid_o = inst_valid;
+
+endmodule

rtl/core/if_id.v

@@ -1,52 +0,0 @@
- /*                                                                      
- Copyright 2019 Blue Liang, liangkangnan@163.com
-                                                                         
- Licensed under the Apache License, Version 2.0 (the "License");         
- you may not use this file except in compliance with the License.        
- You may obtain a copy of the License at                                 
-                                                                         
-     http://www.apache.org/licenses/LICENSE-2.0                          
-                                                                         
- Unless required by applicable law or agreed to in writing, software    
- distributed under the License is distributed on an "AS IS" BASIS,       
- WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- See the License for the specific language governing permissions and     
- limitations under the License.                                          
- */
-
-`include "defines.v"
-
-// 将指令向译码模块传递
-module if_id(
-
-    input wire clk,
-    input wire rst,
-
-    input wire[`InstBus] inst_i,            // 指令内容
-    input wire[`InstAddrBus] inst_addr_i,   // 指令地址
-
-    input wire[`Hold_Flag_Bus] hold_flag_i, // 流水线暂停标志
-
-    input wire[`INT_BUS] int_flag_i,        // 外设中断输入信号
-    output wire[`INT_BUS] int_flag_o,
-
-    output wire[`InstBus] inst_o,           // 指令内容
-    output wire[`InstAddrBus] inst_addr_o   // 指令地址
-
-    );
-
-    wire hold_en = (hold_flag_i >= `Hold_If);
-
-    wire[`InstBus] inst;
-    gen_pipe_dff #(32) inst_ff(clk, rst, hold_en, `INST_NOP, inst_i, inst);
-    assign inst_o = inst;
-
-    wire[`InstAddrBus] inst_addr;
-    gen_pipe_dff #(32) inst_addr_ff(clk, rst, hold_en, `ZeroWord, inst_addr_i, inst_addr);
-    assign inst_addr_o = inst_addr;
-
-    wire[`INT_BUS] int_flag;
-    gen_pipe_dff #(8) int_ff(clk, rst, hold_en, `INT_NONE, int_flag_i, int_flag);
-    assign int_flag_o = int_flag;
-
-endmodule

rtl/core/ifu.sv

@@ -0,0 +1,155 @@
+ /*                                                                      
+ Copyright 2020 Blue Liang, liangkangnan@163.com
+                                                                         
+ Licensed under the Apache License, Version 2.0 (the "License");         
+ you may not use this file except in compliance with the License.        
+ You may obtain a copy of the License at                                 
+                                                                         
+     http://www.apache.org/licenses/LICENSE-2.0                          
+                                                                         
+ Unless required by applicable law or agreed to in writing, software    
+ distributed under the License is distributed on an "AS IS" BASIS,       
+ WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ See the License for the specific language governing permissions and     
+ limitations under the License.                                          
+ */
+
+`include "defines.sv"
+
+// 取指模块
+module ifu #(
+    parameter bit          BranchPredictor      = 1'b1
+    )(
+
+    input wire                      clk,
+    input wire                      rst_n,
+
+    input wire                      flush_i,      // 冲刷标志
+    input wire[31:0]                flush_addr_i, // 冲刷地址
+    input wire[`STALL_WIDTH-1:0]    stall_i,      // 流水线暂停标志
+    input wire                      id_ready_i,   // ID模块可以接收指令
+
+    // to ifu_idu
+    output wire[31:0]               inst_o,
+    output wire[31:0]               pc_o,
+    output wire                     inst_valid_o,
+
+    // 指令总线信号
+    output wire                     instr_req_o,
+    input  wire                     instr_gnt_i,
+    input  wire                     instr_rvalid_i,
+    output wire[31:0]               instr_addr_o,
+    input  wire[31:0]               instr_rdata_i,
+    input  wire                     instr_err_i
+
+    );
+
+    localparam S_RESET    = 3'b001;
+    localparam S_FETCH    = 3'b010;
+    localparam S_VALID    = 3'b100;
+
+    reg[2:0] state_d, state_q;
+
+    wire inst_valid;
+    wire req_valid;
+    wire[31:0] fetch_addr_n;
+    reg[31:0] fetch_addr_q;
+    reg inst_valid_d;
+    reg instr_req_d;
+
+    wire prdt_taken;
+    wire[31:0] prdt_addr;
+
+    // 取指请求有效
+    assign req_valid = instr_gnt_i;
+
+    // 状态切换
+    // 取指模块需要实现连续不断地取指
+    always @ (*) begin
+        state_d = state_q;
+        inst_valid_d = 0;
+        instr_req_d = 1'b0;
+
+        case (state_q)
+            // 复位
+            S_RESET: begin
+                // 复位撤销后转到取指状态
+                if (rst_n) begin
+                    state_d = S_FETCH;
+                end
+            end
+
+            // 取指
+            S_FETCH: begin
+                instr_req_d = 1'b1;
+                // 取指有效
+                if (req_valid) begin
+                    state_d = S_VALID;
+                end
+            end
+
+            // 指令有效
+            S_VALID: begin
+                if (instr_rvalid_i | flush_i) begin
+                    if (instr_rvalid_i) begin
+                        inst_valid_d = 1'b1;
+                    end
+                    instr_req_d = 1'b1;
+                    if (~req_valid) begin
+                        state_d = S_FETCH;
+                    end
+                end
+            end
+
+            default: ;
+        endcase
+    end
+
+    // 指令有效
+    assign inst_valid   = inst_valid_d & id_ready_i;
+    assign inst_valid_o = inst_valid;
+    // 指令无效时用nop指令代替
+    assign inst_o       = inst_valid ? instr_rdata_i: `INST_NOP;
+    assign pc_o         = fetch_addr_q;
+
+    // 更新取指地址
+    assign fetch_addr_n = flush_i        ? flush_addr_i:
+                          prdt_taken     ? prdt_addr:
+                          inst_valid     ? fetch_addr_q + 4'h4:
+                          fetch_addr_q;
+
+    // 取指请求
+    assign instr_req_o  = instr_req_d;
+    // 取指地址(4字节对齐)
+    assign instr_addr_o = {fetch_addr_n[31:2], 2'b00};
+
+    always @ (posedge clk or negedge rst_n) begin
+        if (!rst_n) begin
+            state_q <= S_RESET;
+            fetch_addr_q <= `CPU_RESET_ADDR;
+        end else begin
+            state_q <= state_d;
+            // 取指有效时保存当前取指地址
+            if (req_valid | flush_i) begin
+                fetch_addr_q <= fetch_addr_n;
+            end
+        end
+    end
+
+    // 分支预测
+    if (BranchPredictor) begin: g_branch_predictor
+        bpu u_bpu(
+            .clk(clk),
+            .rst_n(rst_n),
+            .inst_i(inst_o),
+            .inst_valid_i(inst_valid_o),
+            .pc_i(pc_o),
+            .prdt_taken_o(prdt_taken),
+            .prdt_addr_o(prdt_addr)
+        );
+    end else begin: g_no_branch_predictor
+        assign prdt_taken = 1'b0;
+        assign prdt_addr  = 32'h0;
+    end
+
+endmodule

rtl/core/ifu_idu.sv

@@ -0,0 +1,62 @@
+ /*                                                                      
+ Copyright 2019 Blue Liang, liangkangnan@163.com
+                                                                         
+ Licensed under the Apache License, Version 2.0 (the "License");         
+ you may not use this file except in compliance with the License.        
+ You may obtain a copy of the License at                                 
+                                                                         
+     http://www.apache.org/licenses/LICENSE-2.0                          
+                                                                         
+ Unless required by applicable law or agreed to in writing, software    
+ distributed under the License is distributed on an "AS IS" BASIS,       
+ WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ See the License for the specific language governing permissions and     
+ limitations under the License.                                          
+ */
+
+`include "defines.sv"
+
+// 将指令信息向译码模块(通过寄存器)传递
+module ifu_idu(
+
+    input wire clk,                         // 时钟
+    input wire rst_n,                       // 复位
+
+    input wire[`STALL_WIDTH-1:0] stall_i,   // 流水线暂停
+    input wire flush_i,                     // 流水线冲刷
+
+    input wire[31:0] inst_i,                // 指令内容
+    input wire[31:0] inst_addr_i,           // 指令地址
+    input wire inst_valid_i,                // 指令有效
+
+    output wire ready_o,                    // 可以接收指令
+    output wire[31:0] inst_o,               // 指令内容
+    output wire[31:0] inst_addr_o,          // 指令地址
+    output wire inst_valid_o                // 指令有效
+
+    );
+
+    // 使能信号，只要流水线不暂停就传递
+    wire en = (~stall_i[`STALL_ID]) | flush_i;
+
+    assign ready_o = en;
+
+    // 指令内容传递，冲刷或指令无效时传递NOP指令
+    wire[31:0] i_inst = (flush_i | (~inst_valid_i))? `INST_NOP: inst_i;
+    wire[31:0] inst;
+    gen_en_dff #(32) inst_ff(clk, rst_n, en, i_inst, inst);
+    assign inst_o = inst;
+
+    // 指令地址传递
+    wire[31:0] i_inst_addr = flush_i? 32'h0: inst_addr_i;
+    wire[31:0] inst_addr;
+    gen_en_dff #(32) inst_addr_ff(clk, rst_n, en, i_inst_addr, inst_addr);
+    assign inst_addr_o = inst_addr;
+
+    // 指令有效性传递，冲刷时无效
+    wire i_inst_valid = flush_i? 1'b0: inst_valid_i;
+    wire inst_valid;
+    gen_en_dff #(1) inst_valid_ff(clk, rst_n, en, i_inst_valid, inst_valid);
+    assign inst_valid_o = inst_valid;
+
+endmodule

rtl/core/pipe_ctrl.sv

@@ -0,0 +1,72 @@
+ /*                                                                      
+ Copyright 2019 Blue Liang, liangkangnan@163.com
+                                                                         
+ Licensed under the Apache License, Version 2.0 (the "License");         
+ you may not use this file except in compliance with the License.        
+ You may obtain a copy of the License at                                 
+                                                                         
+     http://www.apache.org/licenses/LICENSE-2.0                          
+                                                                         
+ Unless required by applicable law or agreed to in writing, software    
+ distributed under the License is distributed on an "AS IS" BASIS,       
+ WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ See the License for the specific language governing permissions and     
+ limitations under the License.                                          
+ */
+
+`include "defines.sv"
+
+// 流水线控制模块
+// 发出暂停、冲刷流水线信号
+module pipe_ctrl(
+
+    input wire                    clk,
+    input wire                    rst_n,
+
+    input wire                    stall_from_id_i,
+    input wire                    stall_from_ex_i,
+    input wire                    stall_from_jtag_i,
+    input wire                    stall_from_clint_i,
+    input wire                    jump_assert_i,
+    input wire[31:0]              jump_addr_i,
+
+    output wire                   flush_o,              // 冲刷标志
+    output wire[`STALL_WIDTH-1:0] stall_o,              // 暂停标志
+    output wire[31:0]             flush_addr_o          // 冲刷地址
+
+    );
+
+    assign flush_addr_o = jump_addr_i;
+    assign flush_o      = jump_assert_i;
+
+    reg[`STALL_WIDTH-1:0] stall;
+
+    always @ (*) begin
+        stall[`STALL_EX] = 1'b0;
+        stall[`STALL_ID] = 1'b0;
+        stall[`STALL_IF] = 1'b0;
+        stall[`STALL_PC] = 1'b0;
+
+        if (stall_from_clint_i) begin
+            stall[`STALL_EX] = 1'b1;
+            stall[`STALL_ID] = 1'b1;
+            stall[`STALL_IF] = 1'b1;
+            stall[`STALL_PC] = 1'b1;
+        end
+
+        if (stall_from_ex_i) begin
+            stall[`STALL_EX] = 1'b1;
+            stall[`STALL_ID] = 1'b1;
+            stall[`STALL_IF] = 1'b1;
+            stall[`STALL_PC] = 1'b1;
+        end
+
+        if (stall_from_id_i) begin
+            stall[`STALL_IF] = 1'b1;
+            stall[`STALL_PC] = 1'b1;
+        end
+    end
+
+    assign stall_o = stall;
+
+endmodule

rtl/core/regs.v

@@ -1,99 +0,0 @@
- /*                                                                      
- Copyright 2019 Blue Liang, liangkangnan@163.com
-                                                                         
- Licensed under the Apache License, Version 2.0 (the "License");         
- you may not use this file except in compliance with the License.        
- You may obtain a copy of the License at                                 
-                                                                         
-     http://www.apache.org/licenses/LICENSE-2.0                          
-                                                                         
- Unless required by applicable law or agreed to in writing, software    
- distributed under the License is distributed on an "AS IS" BASIS,       
- WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- See the License for the specific language governing permissions and     
- limitations under the License.                                          
- */
-
-`include "defines.v"
-
-// 通用寄存器模块
-module regs(
-
-    input wire clk,
-    input wire rst,
-
-    // from ex
-    input wire we_i,                      // 写寄存器标志
-    input wire[`RegAddrBus] waddr_i,      // 写寄存器地址
-    input wire[`RegBus] wdata_i,          // 写寄存器数据
-
-    // from jtag
-    input wire jtag_we_i,                 // 写寄存器标志
-    input wire[`RegAddrBus] jtag_addr_i,  // 读、写寄存器地址
-    input wire[`RegBus] jtag_data_i,      // 写寄存器数据
-
-    // from id
-    input wire[`RegAddrBus] raddr1_i,     // 读寄存器1地址
-
-    // to id
-    output reg[`RegBus] rdata1_o,         // 读寄存器1数据
-
-    // from id
-    input wire[`RegAddrBus] raddr2_i,     // 读寄存器2地址
-
-    // to id
-    output reg[`RegBus] rdata2_o,         // 读寄存器2数据
-
-    // to jtag
-    output reg[`RegBus] jtag_data_o       // 读寄存器数据
-
-    );
-
-    reg[`RegBus] regs[0:`RegNum - 1];
-
-    // 写寄存器
-    always @ (posedge clk) begin
-        if (rst == `RstDisable) begin
-            // 优先ex模块写操作
-            if ((we_i == `WriteEnable) && (waddr_i != `ZeroReg)) begin
-                regs[waddr_i] <= wdata_i;
-            end else if ((jtag_we_i == `WriteEnable) && (jtag_addr_i != `ZeroReg)) begin
-                regs[jtag_addr_i] <= jtag_data_i;
-            end
-        end
-    end
-
-    // 读寄存器1
-    always @ (*) begin
-        if (raddr1_i == `ZeroReg) begin
-            rdata1_o = `ZeroWord;
-        // 如果读地址等于写地址，并且正在写操作，则直接返回写数据
-        end else if (raddr1_i == waddr_i && we_i == `WriteEnable) begin
-            rdata1_o = wdata_i;
-        end else begin
-            rdata1_o = regs[raddr1_i];
-        end
-    end
-
-    // 读寄存器2
-    always @ (*) begin
-        if (raddr2_i == `ZeroReg) begin
-            rdata2_o = `ZeroWord;
-        // 如果读地址等于写地址，并且正在写操作，则直接返回写数据
-        end else if (raddr2_i == waddr_i && we_i == `WriteEnable) begin
-            rdata2_o = wdata_i;
-        end else begin
-            rdata2_o = regs[raddr2_i];
-        end
-    end
-
-    // jtag读寄存器
-    always @ (*) begin
-        if (jtag_addr_i == `ZeroReg) begin
-            jtag_data_o = `ZeroWord;
-        end else begin
-            jtag_data_o = regs[jtag_addr_i];
-        end
-    end
-
-endmodule

rtl/core/rib.v

@@ -1,340 +0,0 @@
- /*                                                                      
- Copyright 2020 Blue Liang, liangkangnan@163.com
-                                                                         
- Licensed under the Apache License, Version 2.0 (the "License");         
- you may not use this file except in compliance with the License.        
- You may obtain a copy of the License at                                 
-                                                                         
-     http://www.apache.org/licenses/LICENSE-2.0                          
-                                                                         
- Unless required by applicable law or agreed to in writing, software    
- distributed under the License is distributed on an "AS IS" BASIS,       
- WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- See the License for the specific language governing permissions and     
- limitations under the License.                                          
- */
-
-`include "defines.v"
-
-
-// RIB总线模块
-module rib(
-
-    input wire clk,
-    input wire rst,
-
-    // master 0 interface
-    input wire[`MemAddrBus] m0_addr_i,     // 主设备0读、写地址
-    input wire[`MemBus] m0_data_i,         // 主设备0写数据
-    output reg[`MemBus] m0_data_o,         // 主设备0读取到的数据
-    input wire m0_req_i,                   // 主设备0访问请求标志
-    input wire m0_we_i,                    // 主设备0写标志
-
-    // master 1 interface
-    input wire[`MemAddrBus] m1_addr_i,     // 主设备1读、写地址
-    input wire[`MemBus] m1_data_i,         // 主设备1写数据
-    output reg[`MemBus] m1_data_o,         // 主设备1读取到的数据
-    input wire m1_req_i,                   // 主设备1访问请求标志
-    input wire m1_we_i,                    // 主设备1写标志
-
-    // master 2 interface
-    input wire[`MemAddrBus] m2_addr_i,     // 主设备2读、写地址
-    input wire[`MemBus] m2_data_i,         // 主设备2写数据
-    output reg[`MemBus] m2_data_o,         // 主设备2读取到的数据
-    input wire m2_req_i,                   // 主设备2访问请求标志
-    input wire m2_we_i,                    // 主设备2写标志
-
-    // master 3 interface
-    input wire[`MemAddrBus] m3_addr_i,     // 主设备3读、写地址
-    input wire[`MemBus] m3_data_i,         // 主设备3写数据
-    output reg[`MemBus] m3_data_o,         // 主设备3读取到的数据
-    input wire m3_req_i,                   // 主设备3访问请求标志
-    input wire m3_we_i,                    // 主设备3写标志
-
-    // slave 0 interface
-    output reg[`MemAddrBus] s0_addr_o,     // 从设备0读、写地址
-    output reg[`MemBus] s0_data_o,         // 从设备0写数据
-    input wire[`MemBus] s0_data_i,         // 从设备0读取到的数据
-    output reg s0_we_o,                    // 从设备0写标志
-
-    // slave 1 interface
-    output reg[`MemAddrBus] s1_addr_o,     // 从设备1读、写地址
-    output reg[`MemBus] s1_data_o,         // 从设备1写数据
-    input wire[`MemBus] s1_data_i,         // 从设备1读取到的数据
-    output reg s1_we_o,                    // 从设备1写标志
-
-    // slave 2 interface
-    output reg[`MemAddrBus] s2_addr_o,     // 从设备2读、写地址
-    output reg[`MemBus] s2_data_o,         // 从设备2写数据
-    input wire[`MemBus] s2_data_i,         // 从设备2读取到的数据
-    output reg s2_we_o,                    // 从设备2写标志
-
-    // slave 3 interface
-    output reg[`MemAddrBus] s3_addr_o,     // 从设备3读、写地址
-    output reg[`MemBus] s3_data_o,         // 从设备3写数据
-    input wire[`MemBus] s3_data_i,         // 从设备3读取到的数据
-    output reg s3_we_o,                    // 从设备3写标志
-
-    // slave 4 interface
-    output reg[`MemAddrBus] s4_addr_o,     // 从设备4读、写地址
-    output reg[`MemBus] s4_data_o,         // 从设备4写数据
-    input wire[`MemBus] s4_data_i,         // 从设备4读取到的数据
-    output reg s4_we_o,                    // 从设备4写标志
-
-    // slave 5 interface
-    output reg[`MemAddrBus] s5_addr_o,     // 从设备5读、写地址
-    output reg[`MemBus] s5_data_o,         // 从设备5写数据
-    input wire[`MemBus] s5_data_i,         // 从设备5读取到的数据
-    output reg s5_we_o,                    // 从设备5写标志
-
-    output reg hold_flag_o                 // 暂停流水线标志
-
-    );
-
-
-    // 访问地址的最高4位决定要访问的是哪一个从设备
-    // 因此最多支持16个从设备
-    parameter [3:0]slave_0 = 4'b0000;
-    parameter [3:0]slave_1 = 4'b0001;
-    parameter [3:0]slave_2 = 4'b0010;
-    parameter [3:0]slave_3 = 4'b0011;
-    parameter [3:0]slave_4 = 4'b0100;
-    parameter [3:0]slave_5 = 4'b0101;
-
-    parameter [1:0]grant0 = 2'h0;
-    parameter [1:0]grant1 = 2'h1;
-    parameter [1:0]grant2 = 2'h2;
-    parameter [1:0]grant3 = 2'h3;
-
-    wire[3:0] req;
-    reg[1:0] grant;
-
-
-    // 主设备请求信号
-    assign req = {m3_req_i, m2_req_i, m1_req_i, m0_req_i};
-
-    // 仲裁逻辑
-    // 固定优先级仲裁机制
-    // 优先级由高到低：主设备3，主设备0，主设备2，主设备1
-    always @ (*) begin
-        if (req[3]) begin
-            grant = grant3;
-            hold_flag_o = `HoldEnable;
-        end else if (req[0]) begin
-            grant = grant0;
-            hold_flag_o = `HoldEnable;
-        end else if (req[2]) begin
-            grant = grant2;
-            hold_flag_o = `HoldEnable;
-        end else begin
-            grant = grant1;
-            hold_flag_o = `HoldDisable;
-        end
-    end
-
-    // 根据仲裁结果，选择(访问)对应的从设备
-    always @ (*) begin
-        m0_data_o = `ZeroWord;
-        m1_data_o = `INST_NOP;
-        m2_data_o = `ZeroWord;
-        m3_data_o = `ZeroWord;
-
-        s0_addr_o = `ZeroWord;
-        s1_addr_o = `ZeroWord;
-        s2_addr_o = `ZeroWord;
-        s3_addr_o = `ZeroWord;
-        s4_addr_o = `ZeroWord;
-        s5_addr_o = `ZeroWord;
-        s0_data_o = `ZeroWord;
-        s1_data_o = `ZeroWord;
-        s2_data_o = `ZeroWord;
-        s3_data_o = `ZeroWord;
-        s4_data_o = `ZeroWord;
-        s5_data_o = `ZeroWord;
-        s0_we_o = `WriteDisable;
-        s1_we_o = `WriteDisable;
-        s2_we_o = `WriteDisable;
-        s3_we_o = `WriteDisable;
-        s4_we_o = `WriteDisable;
-        s5_we_o = `WriteDisable;
-
-        case (grant)
-            grant0: begin
-                case (m0_addr_i[31:28])
-                    slave_0: begin
-                        s0_we_o = m0_we_i;
-                        s0_addr_o = {{4'h0}, {m0_addr_i[27:0]}};
-                        s0_data_o = m0_data_i;
-                        m0_data_o = s0_data_i;
-                    end
-                    slave_1: begin
-                        s1_we_o = m0_we_i;
-                        s1_addr_o = {{4'h0}, {m0_addr_i[27:0]}};
-                        s1_data_o = m0_data_i;
-                        m0_data_o = s1_data_i;
-                    end
-                    slave_2: begin
-                        s2_we_o = m0_we_i;
-                        s2_addr_o = {{4'h0}, {m0_addr_i[27:0]}};
-                        s2_data_o = m0_data_i;
-                        m0_data_o = s2_data_i;
-                    end
-                    slave_3: begin
-                        s3_we_o = m0_we_i;
-                        s3_addr_o = {{4'h0}, {m0_addr_i[27:0]}};
-                        s3_data_o = m0_data_i;
-                        m0_data_o = s3_data_i;
-                    end
-                    slave_4: begin
-                        s4_we_o = m0_we_i;
-                        s4_addr_o = {{4'h0}, {m0_addr_i[27:0]}};
-                        s4_data_o = m0_data_i;
-                        m0_data_o = s4_data_i;
-                    end
-                    slave_5: begin
-                        s5_we_o = m0_we_i;
-                        s5_addr_o = {{4'h0}, {m0_addr_i[27:0]}};
-                        s5_data_o = m0_data_i;
-                        m0_data_o = s5_data_i;
-                    end
-                    default: begin
-
-                    end
-                endcase
-            end
-            grant1: begin
-                case (m1_addr_i[31:28])
-                    slave_0: begin
-                        s0_we_o = m1_we_i;
-                        s0_addr_o = {{4'h0}, {m1_addr_i[27:0]}};
-                        s0_data_o = m1_data_i;
-                        m1_data_o = s0_data_i;
-                    end
-                    slave_1: begin
-                        s1_we_o = m1_we_i;
-                        s1_addr_o = {{4'h0}, {m1_addr_i[27:0]}};
-                        s1_data_o = m1_data_i;
-                        m1_data_o = s1_data_i;
-                    end
-                    slave_2: begin
-                        s2_we_o = m1_we_i;
-                        s2_addr_o = {{4'h0}, {m1_addr_i[27:0]}};
-                        s2_data_o = m1_data_i;
-                        m1_data_o = s2_data_i;
-                    end
-                    slave_3: begin
-                        s3_we_o = m1_we_i;
-                        s3_addr_o = {{4'h0}, {m1_addr_i[27:0]}};
-                        s3_data_o = m1_data_i;
-                        m1_data_o = s3_data_i;
-                    end
-                    slave_4: begin
-                        s4_we_o = m1_we_i;
-                        s4_addr_o = {{4'h0}, {m1_addr_i[27:0]}};
-                        s4_data_o = m1_data_i;
-                        m1_data_o = s4_data_i;
-                    end
-                    slave_5: begin
-                        s5_we_o = m1_we_i;
-                        s5_addr_o = {{4'h0}, {m1_addr_i[27:0]}};
-                        s5_data_o = m1_data_i;
-                        m1_data_o = s5_data_i;
-                    end
-                    default: begin
-
-                    end
-                endcase
-            end
-            grant2: begin
-                case (m2_addr_i[31:28])
-                    slave_0: begin
-                        s0_we_o = m2_we_i;
-                        s0_addr_o = {{4'h0}, {m2_addr_i[27:0]}};
-                        s0_data_o = m2_data_i;
-                        m2_data_o = s0_data_i;
-                    end
-                    slave_1: begin
-                        s1_we_o = m2_we_i;
-                        s1_addr_o = {{4'h0}, {m2_addr_i[27:0]}};
-                        s1_data_o = m2_data_i;
-                        m2_data_o = s1_data_i;
-                    end
-                    slave_2: begin
-                        s2_we_o = m2_we_i;
-                        s2_addr_o = {{4'h0}, {m2_addr_i[27:0]}};
-                        s2_data_o = m2_data_i;
-                        m2_data_o = s2_data_i;
-                    end
-                    slave_3: begin
-                        s3_we_o = m2_we_i;
-                        s3_addr_o = {{4'h0}, {m2_addr_i[27:0]}};
-                        s3_data_o = m2_data_i;
-                        m2_data_o = s3_data_i;
-                    end
-                    slave_4: begin
-                        s4_we_o = m2_we_i;
-                        s4_addr_o = {{4'h0}, {m2_addr_i[27:0]}};
-                        s4_data_o = m2_data_i;
-                        m2_data_o = s4_data_i;
-                    end
-                    slave_5: begin
-                        s5_we_o = m2_we_i;
-                        s5_addr_o = {{4'h0}, {m2_addr_i[27:0]}};
-                        s5_data_o = m2_data_i;
-                        m2_data_o = s5_data_i;
-                    end
-                    default: begin
-
-                    end
-                endcase
-            end
-            grant3: begin
-                case (m3_addr_i[31:28])
-                    slave_0: begin
-                        s0_we_o = m3_we_i;
-                        s0_addr_o = {{4'h0}, {m3_addr_i[27:0]}};
-                        s0_data_o = m3_data_i;
-                        m3_data_o = s0_data_i;
-                    end
-                    slave_1: begin
-                        s1_we_o = m3_we_i;
-                        s1_addr_o = {{4'h0}, {m3_addr_i[27:0]}};
-                        s1_data_o = m3_data_i;
-                        m3_data_o = s1_data_i;
-                    end
-                    slave_2: begin
-                        s2_we_o = m3_we_i;
-                        s2_addr_o = {{4'h0}, {m3_addr_i[27:0]}};
-                        s2_data_o = m3_data_i;
-                        m3_data_o = s2_data_i;
-                    end
-                    slave_3: begin
-                        s3_we_o = m3_we_i;
-                        s3_addr_o = {{4'h0}, {m3_addr_i[27:0]}};
-                        s3_data_o = m3_data_i;
-                        m3_data_o = s3_data_i;
-                    end
-                    slave_4: begin
-                        s4_we_o = m3_we_i;
-                        s4_addr_o = {{4'h0}, {m3_addr_i[27:0]}};
-                        s4_data_o = m3_data_i;
-                        m3_data_o = s4_data_i;
-                    end
-                    slave_5: begin
-                        s5_we_o = m3_we_i;
-                        s5_addr_o = {{4'h0}, {m3_addr_i[27:0]}};
-                        s5_data_o = m3_data_i;
-                        m3_data_o = s5_data_i;
-                    end
-                    default: begin
-
-                    end
-                endcase
-            end
-            default: begin
-
-            end
-        endcase
-    end
-
-endmodule

rtl/core/rst_gen.sv

@@ -14,37 +14,30 @@
  limitations under the License.                                          
  */
 
-`include "../core/defines.v"
+`include "defines.sv"
 
-
-module rom(
+// 复位控制模块
+module rst_gen #(
+    parameter RESET_FIFO_DEPTH = 5
+    )(
 
     input wire clk,
-    input wire rst,
+    input wire rst_ni,
 
-    input wire we_i,                   // write enable
-    input wire[`MemAddrBus] addr_i,    // addr
-    input wire[`MemBus] data_i,
-
-    output reg[`MemBus] data_o         // read data
+    output wire rst_no
 
     );
 
-    reg[`MemBus] _rom[0:`RomNum - 1];
+    reg[RESET_FIFO_DEPTH-1:0] synch_regs_q;
 
-
-    always @ (posedge clk) begin
-        if (we_i == `WriteEnable) begin
-            _rom[addr_i[31:2]] <= data_i;
-        end
-    end
-
-    always @ (*) begin
-        if (rst == `RstEnable) begin
-            data_o = `ZeroWord;
+    always @ (posedge clk or negedge rst_ni) begin
+        if (~rst_ni) begin
+            synch_regs_q <= 0;
         end else begin
-            data_o = _rom[addr_i[31:2]];
+            synch_regs_q <= {synch_regs_q[RESET_FIFO_DEPTH-2:0], 1'b1};
         end
     end
 
+    assign rst_no = synch_regs_q[RESET_FIFO_DEPTH-1];
+
 endmodule

rtl/core/tinyriscv.v

@@ -1,369 +0,0 @@
- /*                                                                      
- Copyright 2019 Blue Liang, liangkangnan@163.com
-                                                                         
- Licensed under the Apache License, Version 2.0 (the "License");         
- you may not use this file except in compliance with the License.        
- You may obtain a copy of the License at                                 
-                                                                         
-     http://www.apache.org/licenses/LICENSE-2.0                          
-                                                                         
- Unless required by applicable law or agreed to in writing, software    
- distributed under the License is distributed on an "AS IS" BASIS,       
- WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- See the License for the specific language governing permissions and     
- limitations under the License.                                          
- */
-
-`include "defines.v"
-
-// tinyriscv处理器核顶层模块
-module tinyriscv(
-
-    input wire clk,
-    input wire rst,
-
-    output wire[`MemAddrBus] rib_ex_addr_o,    // 读、写外设的地址
-    input wire[`MemBus] rib_ex_data_i,         // 从外设读取的数据
-    output wire[`MemBus] rib_ex_data_o,        // 写入外设的数据
-    output wire rib_ex_req_o,                  // 访问外设请求
-    output wire rib_ex_we_o,                   // 写外设标志
-
-    output wire[`MemAddrBus] rib_pc_addr_o,    // 取指地址
-    input wire[`MemBus] rib_pc_data_i,         // 取到的指令内容
-
-    input wire[`RegAddrBus] jtag_reg_addr_i,   // jtag模块读、写寄存器的地址
-    input wire[`RegBus] jtag_reg_data_i,       // jtag模块写寄存器数据
-    input wire jtag_reg_we_i,                  // jtag模块写寄存器标志
-    output wire[`RegBus] jtag_reg_data_o,      // jtag模块读取到的寄存器数据
-
-    input wire rib_hold_flag_i,                // 总线暂停标志
-    input wire jtag_halt_flag_i,               // jtag暂停标志
-    input wire jtag_reset_flag_i,              // jtag复位PC标志
-
-    input wire[`INT_BUS] int_i                 // 中断信号
-
-    );
-
-    // pc_reg模块输出信号
-	wire[`InstAddrBus] pc_pc_o;
-
-    // if_id模块输出信号
-	wire[`InstBus] if_inst_o;
-    wire[`InstAddrBus] if_inst_addr_o;
-    wire[`INT_BUS] if_int_flag_o;
-
-    // id模块输出信号
-    wire[`RegAddrBus] id_reg1_raddr_o;
-    wire[`RegAddrBus] id_reg2_raddr_o;
-    wire[`InstBus] id_inst_o;
-    wire[`InstAddrBus] id_inst_addr_o;
-    wire[`RegBus] id_reg1_rdata_o;
-    wire[`RegBus] id_reg2_rdata_o;
-    wire id_reg_we_o;
-    wire[`RegAddrBus] id_reg_waddr_o;
-    wire[`MemAddrBus] id_csr_raddr_o;
-    wire id_csr_we_o;
-    wire[`RegBus] id_csr_rdata_o;
-    wire[`MemAddrBus] id_csr_waddr_o;
-    wire[`MemAddrBus] id_op1_o;
-    wire[`MemAddrBus] id_op2_o;
-    wire[`MemAddrBus] id_op1_jump_o;
-    wire[`MemAddrBus] id_op2_jump_o;
-
-    // id_ex模块输出信号
-    wire[`InstBus] ie_inst_o;
-    wire[`InstAddrBus] ie_inst_addr_o;
-    wire ie_reg_we_o;
-    wire[`RegAddrBus] ie_reg_waddr_o;
-    wire[`RegBus] ie_reg1_rdata_o;
-    wire[`RegBus] ie_reg2_rdata_o;
-    wire ie_csr_we_o;
-    wire[`MemAddrBus] ie_csr_waddr_o;
-    wire[`RegBus] ie_csr_rdata_o;
-    wire[`MemAddrBus] ie_op1_o;
-    wire[`MemAddrBus] ie_op2_o;
-    wire[`MemAddrBus] ie_op1_jump_o;
-    wire[`MemAddrBus] ie_op2_jump_o;
-
-    // ex模块输出信号
-    wire[`MemBus] ex_mem_wdata_o;
-    wire[`MemAddrBus] ex_mem_raddr_o;
-    wire[`MemAddrBus] ex_mem_waddr_o;
-    wire ex_mem_we_o;
-    wire ex_mem_req_o;
-    wire[`RegBus] ex_reg_wdata_o;
-    wire ex_reg_we_o;
-    wire[`RegAddrBus] ex_reg_waddr_o;
-    wire ex_hold_flag_o;
-    wire ex_jump_flag_o;
-    wire[`InstAddrBus] ex_jump_addr_o;
-    wire ex_div_start_o;
-    wire[`RegBus] ex_div_dividend_o;
-    wire[`RegBus] ex_div_divisor_o;
-    wire[2:0] ex_div_op_o;
-    wire[`RegAddrBus] ex_div_reg_waddr_o;
-    wire[`RegBus] ex_csr_wdata_o;
-    wire ex_csr_we_o;
-    wire[`MemAddrBus] ex_csr_waddr_o;
-
-    // regs模块输出信号
-    wire[`RegBus] regs_rdata1_o;
-    wire[`RegBus] regs_rdata2_o;
-
-    // csr_reg模块输出信号
-    wire[`RegBus] csr_data_o;
-    wire[`RegBus] csr_clint_data_o;
-    wire csr_global_int_en_o;
-    wire[`RegBus] csr_clint_csr_mtvec;
-    wire[`RegBus] csr_clint_csr_mepc;
-    wire[`RegBus] csr_clint_csr_mstatus;
-
-    // ctrl模块输出信号
-    wire[`Hold_Flag_Bus] ctrl_hold_flag_o;
-    wire ctrl_jump_flag_o;
-    wire[`InstAddrBus] ctrl_jump_addr_o;
-
-    // div模块输出信号
-    wire[`RegBus] div_result_o;
-	wire div_ready_o;
-    wire div_busy_o;
-    wire[`RegAddrBus] div_reg_waddr_o;
-
-    // clint模块输出信号
-    wire clint_we_o;
-    wire[`MemAddrBus] clint_waddr_o;
-    wire[`MemAddrBus] clint_raddr_o;
-    wire[`RegBus] clint_data_o;
-    wire[`InstAddrBus] clint_int_addr_o;
-    wire clint_int_assert_o;
-    wire clint_hold_flag_o;
-
-
-    assign rib_ex_addr_o = (ex_mem_we_o == `WriteEnable)? ex_mem_waddr_o: ex_mem_raddr_o;
-    assign rib_ex_data_o = ex_mem_wdata_o;
-    assign rib_ex_req_o = ex_mem_req_o;
-    assign rib_ex_we_o = ex_mem_we_o;
-
-    assign rib_pc_addr_o = pc_pc_o;
-
-
-    // pc_reg模块例化
-    pc_reg u_pc_reg(
-        .clk(clk),
-        .rst(rst),
-        .jtag_reset_flag_i(jtag_reset_flag_i),
-        .pc_o(pc_pc_o),
-        .hold_flag_i(ctrl_hold_flag_o),
-        .jump_flag_i(ctrl_jump_flag_o),
-        .jump_addr_i(ctrl_jump_addr_o)
-    );
-
-    // ctrl模块例化
-    ctrl u_ctrl(
-        .rst(rst),
-        .jump_flag_i(ex_jump_flag_o),
-        .jump_addr_i(ex_jump_addr_o),
-        .hold_flag_ex_i(ex_hold_flag_o),
-        .hold_flag_rib_i(rib_hold_flag_i),
-        .hold_flag_o(ctrl_hold_flag_o),
-        .hold_flag_clint_i(clint_hold_flag_o),
-        .jump_flag_o(ctrl_jump_flag_o),
-        .jump_addr_o(ctrl_jump_addr_o),
-        .jtag_halt_flag_i(jtag_halt_flag_i)
-    );
-
-    // regs模块例化
-    regs u_regs(
-        .clk(clk),
-        .rst(rst),
-        .we_i(ex_reg_we_o),
-        .waddr_i(ex_reg_waddr_o),
-        .wdata_i(ex_reg_wdata_o),
-        .raddr1_i(id_reg1_raddr_o),
-        .rdata1_o(regs_rdata1_o),
-        .raddr2_i(id_reg2_raddr_o),
-        .rdata2_o(regs_rdata2_o),
-        .jtag_we_i(jtag_reg_we_i),
-        .jtag_addr_i(jtag_reg_addr_i),
-        .jtag_data_i(jtag_reg_data_i),
-        .jtag_data_o(jtag_reg_data_o)
-    );
-
-    // csr_reg模块例化
-    csr_reg u_csr_reg(
-        .clk(clk),
-        .rst(rst),
-        .we_i(ex_csr_we_o),
-        .raddr_i(id_csr_raddr_o),
-        .waddr_i(ex_csr_waddr_o),
-        .data_i(ex_csr_wdata_o),
-        .data_o(csr_data_o),
-        .global_int_en_o(csr_global_int_en_o),
-        .clint_we_i(clint_we_o),
-        .clint_raddr_i(clint_raddr_o),
-        .clint_waddr_i(clint_waddr_o),
-        .clint_data_i(clint_data_o),
-        .clint_data_o(csr_clint_data_o),
-        .clint_csr_mtvec(csr_clint_csr_mtvec),
-        .clint_csr_mepc(csr_clint_csr_mepc),
-        .clint_csr_mstatus(csr_clint_csr_mstatus)
-    );
-
-    // if_id模块例化
-    if_id u_if_id(
-        .clk(clk),
-        .rst(rst),
-        .inst_i(rib_pc_data_i),
-        .inst_addr_i(pc_pc_o),
-        .int_flag_i(int_i),
-        .int_flag_o(if_int_flag_o),
-        .hold_flag_i(ctrl_hold_flag_o),
-        .inst_o(if_inst_o),
-        .inst_addr_o(if_inst_addr_o)
-    );
-
-    // id模块例化
-    id u_id(
-        .rst(rst),
-        .inst_i(if_inst_o),
-        .inst_addr_i(if_inst_addr_o),
-        .reg1_rdata_i(regs_rdata1_o),
-        .reg2_rdata_i(regs_rdata2_o),
-        .ex_jump_flag_i(ex_jump_flag_o),
-        .reg1_raddr_o(id_reg1_raddr_o),
-        .reg2_raddr_o(id_reg2_raddr_o),
-        .inst_o(id_inst_o),
-        .inst_addr_o(id_inst_addr_o),
-        .reg1_rdata_o(id_reg1_rdata_o),
-        .reg2_rdata_o(id_reg2_rdata_o),
-        .reg_we_o(id_reg_we_o),
-        .reg_waddr_o(id_reg_waddr_o),
-        .op1_o(id_op1_o),
-        .op2_o(id_op2_o),
-        .op1_jump_o(id_op1_jump_o),
-        .op2_jump_o(id_op2_jump_o),
-        .csr_rdata_i(csr_data_o),
-        .csr_raddr_o(id_csr_raddr_o),
-        .csr_we_o(id_csr_we_o),
-        .csr_rdata_o(id_csr_rdata_o),
-        .csr_waddr_o(id_csr_waddr_o)
-    );
-
-    // id_ex模块例化
-    id_ex u_id_ex(
-        .clk(clk),
-        .rst(rst),
-        .inst_i(id_inst_o),
-        .inst_addr_i(id_inst_addr_o),
-        .reg_we_i(id_reg_we_o),
-        .reg_waddr_i(id_reg_waddr_o),
-        .reg1_rdata_i(id_reg1_rdata_o),
-        .reg2_rdata_i(id_reg2_rdata_o),
-        .hold_flag_i(ctrl_hold_flag_o),
-        .inst_o(ie_inst_o),
-        .inst_addr_o(ie_inst_addr_o),
-        .reg_we_o(ie_reg_we_o),
-        .reg_waddr_o(ie_reg_waddr_o),
-        .reg1_rdata_o(ie_reg1_rdata_o),
-        .reg2_rdata_o(ie_reg2_rdata_o),
-        .op1_i(id_op1_o),
-        .op2_i(id_op2_o),
-        .op1_jump_i(id_op1_jump_o),
-        .op2_jump_i(id_op2_jump_o),
-        .op1_o(ie_op1_o),
-        .op2_o(ie_op2_o),
-        .op1_jump_o(ie_op1_jump_o),
-        .op2_jump_o(ie_op2_jump_o),
-        .csr_we_i(id_csr_we_o),
-        .csr_waddr_i(id_csr_waddr_o),
-        .csr_rdata_i(id_csr_rdata_o),
-        .csr_we_o(ie_csr_we_o),
-        .csr_waddr_o(ie_csr_waddr_o),
-        .csr_rdata_o(ie_csr_rdata_o)
-    );
-
-    // ex模块例化
-    ex u_ex(
-        .rst(rst),
-        .inst_i(ie_inst_o),
-        .inst_addr_i(ie_inst_addr_o),
-        .reg_we_i(ie_reg_we_o),
-        .reg_waddr_i(ie_reg_waddr_o),
-        .reg1_rdata_i(ie_reg1_rdata_o),
-        .reg2_rdata_i(ie_reg2_rdata_o),
-        .op1_i(ie_op1_o),
-        .op2_i(ie_op2_o),
-        .op1_jump_i(ie_op1_jump_o),
-        .op2_jump_i(ie_op2_jump_o),
-        .mem_rdata_i(rib_ex_data_i),
-        .mem_wdata_o(ex_mem_wdata_o),
-        .mem_raddr_o(ex_mem_raddr_o),
-        .mem_waddr_o(ex_mem_waddr_o),
-        .mem_we_o(ex_mem_we_o),
-        .mem_req_o(ex_mem_req_o),
-        .reg_wdata_o(ex_reg_wdata_o),
-        .reg_we_o(ex_reg_we_o),
-        .reg_waddr_o(ex_reg_waddr_o),
-        .hold_flag_o(ex_hold_flag_o),
-        .jump_flag_o(ex_jump_flag_o),
-        .jump_addr_o(ex_jump_addr_o),
-        .int_assert_i(clint_int_assert_o),
-        .int_addr_i(clint_int_addr_o),
-        .div_ready_i(div_ready_o),
-        .div_result_i(div_result_o),
-        .div_busy_i(div_busy_o),
-        .div_reg_waddr_i(div_reg_waddr_o),
-        .div_start_o(ex_div_start_o),
-        .div_dividend_o(ex_div_dividend_o),
-        .div_divisor_o(ex_div_divisor_o),
-        .div_op_o(ex_div_op_o),
-        .div_reg_waddr_o(ex_div_reg_waddr_o),
-        .csr_we_i(ie_csr_we_o),
-        .csr_waddr_i(ie_csr_waddr_o),
-        .csr_rdata_i(ie_csr_rdata_o),
-        .csr_wdata_o(ex_csr_wdata_o),
-        .csr_we_o(ex_csr_we_o),
-        .csr_waddr_o(ex_csr_waddr_o)
-    );
-
-    // div模块例化
-    div u_div(
-        .clk(clk),
-        .rst(rst),
-        .dividend_i(ex_div_dividend_o),
-        .divisor_i(ex_div_divisor_o),
-        .start_i(ex_div_start_o),
-        .op_i(ex_div_op_o),
-        .reg_waddr_i(ex_div_reg_waddr_o),
-        .result_o(div_result_o),
-        .ready_o(div_ready_o),
-        .busy_o(div_busy_o),
-        .reg_waddr_o(div_reg_waddr_o)
-    );
-
-    // clint模块例化
-    clint u_clint(
-        .clk(clk),
-        .rst(rst),
-        .int_flag_i(if_int_flag_o),
-        .inst_i(id_inst_o),
-        .inst_addr_i(id_inst_addr_o),
-        .jump_flag_i(ex_jump_flag_o),
-        .jump_addr_i(ex_jump_addr_o),
-        .hold_flag_i(ctrl_hold_flag_o),
-        .div_started_i(ex_div_start_o),
-        .data_i(csr_clint_data_o),
-        .csr_mtvec(csr_clint_csr_mtvec),
-        .csr_mepc(csr_clint_csr_mepc),
-        .csr_mstatus(csr_clint_csr_mstatus),
-        .we_o(clint_we_o),
-        .waddr_o(clint_waddr_o),
-        .raddr_o(clint_raddr_o),
-        .data_o(clint_data_o),
-        .hold_flag_o(clint_hold_flag_o),
-        .global_int_en_i(csr_global_int_en_o),
-        .int_addr_o(clint_int_addr_o),
-        .int_assert_o(clint_int_assert_o)
-    );
-
-endmodule

rtl/core/tinyriscv_core.sv

@@ -0,0 +1,366 @@
+ /*                                                                      
+ Copyright 2019 Blue Liang, liangkangnan@163.com
+                                                                         
+ Licensed under the Apache License, Version 2.0 (the "License");         
+ you may not use this file except in compliance with the License.        
+ You may obtain a copy of the License at                                 
+                                                                         
+     http://www.apache.org/licenses/LICENSE-2.0                          
+                                                                         
+ Unless required by applicable law or agreed to in writing, software    
+ distributed under the License is distributed on an "AS IS" BASIS,       
+ WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ See the License for the specific language governing permissions and     
+ limitations under the License.                                          
+ */
+
+`include "defines.sv"
+
+// tinyriscv处理器核顶层模块
+module tinyriscv_core #(
+    parameter int unsigned DEBUG_HALT_ADDR      = 32'h10000800,
+    parameter int unsigned DEBUG_EXCEPTION_ADDR = 32'h10000808,
+    parameter bit          BranchPredictor      = 1'b1,
+    parameter bit          TRACE_ENABLE         = 1'b0
+    )(
+
+    input wire clk,
+    input wire rst_n,
+
+    // instr fetch interface
+    output wire instr_req_o,
+    input wire instr_gnt_i,
+    input wire instr_rvalid_i,
+    output wire[31:0] instr_addr_o,
+    input wire[31:0] instr_rdata_i,
+    input wire instr_err_i,
+
+    // data access interface
+    output wire data_req_o,
+    input wire data_gnt_i,
+    input wire data_rvalid_i,
+    output wire data_we_o,
+    output wire[3:0] data_be_o,
+    output wire[31:0] data_addr_o,
+    output wire[31:0] data_wdata_o,
+    input wire[31:0] data_rdata_i,
+    input wire data_err_i,
+
+    // interrupt input
+    input wire int_req_i,
+    input wire[7:0] int_id_i,
+
+    // debug request signal
+    input wire debug_req_i
+
+    );
+
+    // ifu模块输出信号
+    wire[31:0] ifetch_inst_o;
+    wire[31:0] ifetch_pc_o;
+    wire ifetch_inst_valid_o;
+
+    // ifu_idu模块输出信号
+	wire[31:0] if_inst_o;
+    wire[31:0] if_inst_addr_o;
+    wire if_inst_valid_o;
+    wire if_ready_o;
+
+    // idu模块输出信号
+    wire[31:0] id_inst_o;
+    wire[31:0] id_inst_addr_o;
+    wire[`DECINFO_WIDTH-1:0] id_dec_info_bus_o;
+    wire[31:0] id_dec_imm_o;
+    wire[31:0] id_dec_pc_o;
+    wire[4:0] id_rs1_raddr_o;
+    wire[4:0] id_rs2_raddr_o;
+    wire[4:0] id_rd_waddr_o;
+    wire id_rd_we_o;
+    wire id_stall_o;
+    wire[31:0] id_rs1_rdata_o;
+    wire[31:0] id_rs2_rdata_o;
+    wire id_illegal_inst_o;
+    wire id_inst_valid_o;
+
+    // idu_exu模块输出信号
+    wire[31:0] ie_inst_o;
+    wire[31:0] ie_inst_addr_o;
+    wire[`DECINFO_WIDTH-1:0] ie_dec_info_bus_o;
+    wire[31:0] ie_dec_imm_o;
+    wire[31:0] ie_dec_pc_o;
+    wire[31:0] ie_rs1_rdata_o;
+    wire[31:0] ie_rs2_rdata_o;
+    wire[4:0] ie_rd_waddr_o;
+    wire ie_rd_we_o;
+    wire ie_inst_valid_o;
+
+    // exu模块输出信号
+    wire[31:0] ex_mem_wdata_o;
+    wire[31:0] ex_mem_addr_o;
+    wire ex_mem_we_o;
+    wire[3:0] ex_mem_sel_o;
+    wire ex_mem_req_valid_o;
+    wire ex_mem_rsp_ready_o;
+    wire ex_mem_access_misaligned_o;
+    wire[31:0] ex_reg_wdata_o;
+    wire ex_reg_we_o;
+    wire[4:0] ex_reg_waddr_o;
+    wire ex_hold_flag_o;
+    wire ex_jump_flag_o;
+    wire[31:0] ex_jump_addr_o;
+    wire[31:0] ex_csr_wdata_o;
+    wire ex_csr_we_o;
+    wire[31:0] ex_csr_waddr_o;
+    wire[31:0] ex_csr_raddr_o;
+    wire ex_inst_ecall_o;
+    wire ex_inst_ebreak_o;
+    wire ex_inst_mret_o;
+    wire ex_inst_dret_o;
+    wire ex_inst_valid_o;
+    wire ex_inst_executed_o;
+
+    // gpr_reg模块输出信号
+    wire[31:0] regs_rdata1_o;
+    wire[31:0] regs_rdata2_o;
+
+    // csr_reg模块输出信号
+    wire[31:0] csr_ex_data_o;
+    wire[31:0] csr_clint_data_o;
+    wire[31:0] csr_mtvec_o;
+    wire[31:0] csr_mepc_o;
+    wire[31:0] csr_mstatus_o;
+    wire[31:0] csr_mie_o;
+    wire[31:0] csr_dpc_o;
+    wire[31:0] csr_dcsr_o;
+    wire csr_trigger_match_o;
+
+    // pipe_ctrl模块输出信号
+    wire[31:0] ctrl_flush_addr_o;
+    wire ctrl_flush_o;
+    wire[`STALL_WIDTH-1:0] ctrl_stall_o;
+
+    // exception模块输出信号
+    wire excep_csr_we_o;
+    wire[31:0] excep_csr_waddr_o;
+    wire[31:0] excep_csr_wdata_o;
+    wire excep_stall_flag_o;
+    wire[31:0] excep_int_addr_o;
+    wire excep_int_assert_o;
+
+
+    ifu #(
+        .BranchPredictor(BranchPredictor)
+    ) u_ifu (
+        .clk(clk),
+        .rst_n(rst_n),
+        .flush_addr_i(ctrl_flush_addr_o),
+        .stall_i(ctrl_stall_o),
+        .flush_i(ctrl_flush_o),
+        .id_ready_i(if_ready_o),
+        .inst_o(ifetch_inst_o),
+        .pc_o(ifetch_pc_o),
+        .inst_valid_o(ifetch_inst_valid_o),
+        .instr_req_o(instr_req_o),
+        .instr_gnt_i(instr_gnt_i),
+        .instr_rvalid_i(instr_rvalid_i),
+        .instr_addr_o(instr_addr_o),
+        .instr_rdata_i(instr_rdata_i),
+        .instr_err_i(instr_err_i)
+    );
+
+    pipe_ctrl u_pipe_ctrl(
+        .clk(clk),
+        .rst_n(rst_n),
+        .stall_from_id_i(id_stall_o),
+        .stall_from_ex_i(ex_hold_flag_o),
+        .stall_from_jtag_i(1'b0),
+        .stall_from_clint_i(excep_stall_flag_o),
+        .jump_assert_i(ex_jump_flag_o),
+        .jump_addr_i(ex_jump_addr_o),
+        .flush_o(ctrl_flush_o),
+        .stall_o(ctrl_stall_o),
+        .flush_addr_o(ctrl_flush_addr_o)
+    );
+
+    gpr_reg u_gpr_reg(
+        .clk(clk),
+        .rst_n(rst_n),
+        .we_i(ex_reg_we_o),
+        .waddr_i(ex_reg_waddr_o),
+        .wdata_i(ex_reg_wdata_o),
+        .raddr1_i(id_rs1_raddr_o),
+        .rdata1_o(regs_rdata1_o),
+        .raddr2_i(id_rs2_raddr_o),
+        .rdata2_o(regs_rdata2_o)
+    );
+
+    csr_reg u_csr_reg(
+        .clk(clk),
+        .rst_n(rst_n),
+        .pc_if_i(ie_dec_pc_o),
+        .trigger_match_o(csr_trigger_match_o),
+        .exu_we_i(ex_csr_we_o),
+        .exu_raddr_i(ex_csr_raddr_o),
+        .exu_waddr_i(ex_csr_waddr_o),
+        .exu_wdata_i(ex_csr_wdata_o),
+        .exu_rdata_o(csr_ex_data_o),
+        .excep_we_i(excep_csr_we_o),
+        .excep_waddr_i(excep_csr_waddr_o),
+        .excep_wdata_i(excep_csr_wdata_o),
+        .mtvec_o(csr_mtvec_o),
+        .mepc_o(csr_mepc_o),
+        .mstatus_o(csr_mstatus_o),
+        .mie_o(csr_mie_o),
+        .dpc_o(csr_dpc_o),
+        .dcsr_o(csr_dcsr_o)
+    );
+
+    ifu_idu u_ifu_idu(
+        .clk(clk),
+        .rst_n(rst_n),
+        .inst_i(ifetch_inst_o),
+        .inst_addr_i(ifetch_pc_o),
+        .stall_i(ctrl_stall_o),
+        .flush_i(ctrl_flush_o),
+        .inst_valid_i(ifetch_inst_valid_o),
+        .ready_o(if_ready_o),
+        .inst_valid_o(if_inst_valid_o),
+        .inst_o(if_inst_o),
+        .inst_addr_o(if_inst_addr_o)
+    );
+
+    idu u_idu(
+        .clk(clk),
+        .rst_n(rst_n),
+        .inst_i(if_inst_o),
+        .inst_valid_i(if_inst_valid_o),
+        .rs1_rdata_i(regs_rdata1_o),
+        .rs2_rdata_i(regs_rdata2_o),
+        .inst_o(id_inst_o),
+        .inst_valid_o(id_inst_valid_o),
+        .inst_addr_i(if_inst_addr_o),
+        .rs1_rdata_o(id_rs1_rdata_o),
+        .rs2_rdata_o(id_rs2_rdata_o),
+        .stall_o(id_stall_o),
+        .illegal_inst_o(id_illegal_inst_o),
+        .dec_info_bus_o(id_dec_info_bus_o),
+        .dec_imm_o(id_dec_imm_o),
+        .dec_pc_o(id_dec_pc_o),
+        .rs1_raddr_o(id_rs1_raddr_o),
+        .rs2_raddr_o(id_rs2_raddr_o),
+        .rd_waddr_o(id_rd_waddr_o),
+        .rd_we_o(id_rd_we_o)
+    );
+
+    idu_exu u_idu_exu(
+        .clk(clk),
+        .rst_n(rst_n),
+        .inst_i(id_inst_o),
+        .stall_i(ctrl_stall_o),
+        .flush_i(ctrl_flush_o),
+        .dec_info_bus_i(id_dec_info_bus_o),
+        .dec_imm_i(id_dec_imm_o),
+        .dec_pc_i(id_dec_pc_o),
+        .rs1_rdata_i(id_rs1_rdata_o),
+        .rs2_rdata_i(id_rs2_rdata_o),
+        .rd_waddr_i(id_rd_waddr_o),
+        .rd_we_i(id_rd_we_o),
+        .inst_valid_i(id_inst_valid_o),
+        .inst_valid_o(ie_inst_valid_o),
+        .inst_o(ie_inst_o),
+        .dec_info_bus_o(ie_dec_info_bus_o),
+        .dec_imm_o(ie_dec_imm_o),
+        .dec_pc_o(ie_dec_pc_o),
+        .rs1_rdata_o(ie_rs1_rdata_o),
+        .rs2_rdata_o(ie_rs2_rdata_o),
+        .rd_waddr_o(ie_rd_waddr_o),
+        .rd_we_o(ie_rd_we_o)
+    );
+
+    exu #(
+        .BranchPredictor(BranchPredictor)
+    ) u_exu (
+        .clk(clk),
+        .rst_n(rst_n),
+        .reg1_rdata_i(ie_rs1_rdata_o),
+        .reg2_rdata_i(ie_rs2_rdata_o),
+        .mem_rdata_i(data_rdata_i),
+        .mem_gnt_i(data_gnt_i),
+        .mem_rvalid_i(data_rvalid_i),
+        .mem_wdata_o(data_wdata_o),
+        .mem_addr_o(data_addr_o),
+        .mem_we_o(data_we_o),
+        .mem_be_o(data_be_o),
+        .mem_req_o(data_req_o),
+        .mem_access_misaligned_o(ex_mem_access_misaligned_o),
+        .reg_wdata_o(ex_reg_wdata_o),
+        .reg_we_o(ex_reg_we_o),
+        .reg_waddr_o(ex_reg_waddr_o),
+        .hold_flag_o(ex_hold_flag_o),
+        .jump_flag_o(ex_jump_flag_o),
+        .jump_addr_o(ex_jump_addr_o),
+        .int_assert_i(excep_int_assert_o),
+        .int_addr_i(excep_int_addr_o),
+        .inst_ecall_o(ex_inst_ecall_o),
+        .inst_ebreak_o(ex_inst_ebreak_o),
+        .inst_mret_o(ex_inst_mret_o),
+        .inst_dret_o(ex_inst_dret_o),
+        .int_stall_i(excep_stall_flag_o),
+        .csr_raddr_o(ex_csr_raddr_o),
+        .csr_rdata_i(csr_ex_data_o),
+        .csr_wdata_o(ex_csr_wdata_o),
+        .csr_we_o(ex_csr_we_o),
+        .csr_waddr_o(ex_csr_waddr_o),
+        .inst_valid_o(ex_inst_valid_o),
+        .inst_valid_i(ie_inst_valid_o),
+        .inst_executed_o(ex_inst_executed_o),
+        .inst_i(ie_inst_o),
+        .dec_info_bus_i(ie_dec_info_bus_o),
+        .dec_imm_i(ie_dec_imm_o),
+        .dec_pc_i(ie_dec_pc_o),
+        .next_pc_i(if_inst_addr_o),
+        .rd_waddr_i(ie_rd_waddr_o),
+        .rd_we_i(ie_rd_we_o)
+    );
+
+    exception u_exception(
+        .clk(clk),
+        .rst_n(rst_n),
+        .illegal_inst_i(id_illegal_inst_o),
+        .inst_valid_i(ie_inst_valid_o),
+        .inst_executed_i(ex_inst_executed_o),
+        .inst_ecall_i(ex_inst_ecall_o),
+        .inst_ebreak_i(ex_inst_ebreak_o),
+        .inst_mret_i(ex_inst_mret_o),
+        .inst_dret_i(ex_inst_dret_o),
+        .inst_addr_i(ie_dec_pc_o),
+        .mtvec_i(csr_mtvec_o),
+        .mepc_i(csr_mepc_o),
+        .mstatus_i(csr_mstatus_o),
+        .mie_i(csr_mie_o),
+        .dpc_i(csr_dpc_o),
+        .dcsr_i(csr_dcsr_o),
+        .trigger_match_i(csr_trigger_match_o),
+        .int_req_i(int_req_i),
+        .int_id_i(int_id_i),
+        .debug_halt_addr_i(DEBUG_HALT_ADDR),
+        .debug_req_i(debug_req_i),
+        .csr_we_o(excep_csr_we_o),
+        .csr_waddr_o(excep_csr_waddr_o),
+        .csr_wdata_o(excep_csr_wdata_o),
+        .stall_flag_o(excep_stall_flag_o),
+        .int_addr_o(excep_int_addr_o),
+        .int_assert_o(excep_int_assert_o)
+    );
+
+    if (TRACE_ENABLE) begin: instr_trace
+        tracer u_tracer(
+            .clk(clk),
+            .rst_n(rst_n),
+            .inst_i(ie_inst_o),
+            .pc_i(ie_dec_pc_o),
+            .inst_valid_i(ex_inst_valid_o)
+        );
+    end
+
+endmodule

rtl/core/tracer.sv

@@ -0,0 +1,613 @@
+ /*                                                                      
+ Copyright 2021 Blue Liang, liangkangnan@163.com
+                                                                         
+ Licensed under the Apache License, Version 2.0 (the "License");         
+ you may not use this file except in compliance with the License.        
+ You may obtain a copy of the License at                                 
+                                                                         
+     http://www.apache.org/licenses/LICENSE-2.0                          
+                                                                         
+ Unless required by applicable law or agreed to in writing, software    
+ distributed under the License is distributed on an "AS IS" BASIS,       
+ WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ See the License for the specific language governing permissions and     
+ limitations under the License.                                          
+ */
+
+module tracer(
+    input logic clk,
+    input logic rst_n,
+
+    input logic[31:0] inst_i,
+    input logic[31:0] pc_i,
+    input logic inst_valid_i
+
+    );
+
+
+    typedef enum logic [6:0] {
+      OPCODE_LOAD     = 7'h03,
+      OPCODE_MISC_MEM = 7'h0f,
+      OPCODE_OP_IMM   = 7'h13,
+      OPCODE_AUIPC    = 7'h17,
+      OPCODE_STORE    = 7'h23,
+      OPCODE_OP       = 7'h33,
+      OPCODE_LUI      = 7'h37,
+      OPCODE_BRANCH   = 7'h63,
+      OPCODE_JALR     = 7'h67,
+      OPCODE_JAL      = 7'h6f,
+      OPCODE_SYSTEM   = 7'h73
+    } opcode_e;
+
+
+    // instruction masks (for tracer)
+    parameter logic [31:0] INSN_LUI     = { 25'h?,                           {OPCODE_LUI  } };
+    parameter logic [31:0] INSN_AUIPC   = { 25'h?,                           {OPCODE_AUIPC} };
+    parameter logic [31:0] INSN_JAL     = { 25'h?,                           {OPCODE_JAL  } };
+    parameter logic [31:0] INSN_JALR    = { 17'h?,             3'b000, 5'h?, {OPCODE_JALR } };
+
+    // BRANCH
+    parameter logic [31:0] INSN_BEQ     = { 17'h?,             3'b000, 5'h?, {OPCODE_BRANCH} };
+    parameter logic [31:0] INSN_BNE     = { 17'h?,             3'b001, 5'h?, {OPCODE_BRANCH} };
+    parameter logic [31:0] INSN_BLT     = { 17'h?,             3'b100, 5'h?, {OPCODE_BRANCH} };
+    parameter logic [31:0] INSN_BGE     = { 17'h?,             3'b101, 5'h?, {OPCODE_BRANCH} };
+    parameter logic [31:0] INSN_BLTU    = { 17'h?,             3'b110, 5'h?, {OPCODE_BRANCH} };
+    parameter logic [31:0] INSN_BGEU    = { 17'h?,             3'b111, 5'h?, {OPCODE_BRANCH} };
+
+    // OPIMM
+    parameter logic [31:0] INSN_ADDI    = { 17'h?,             3'b000, 5'h?, {OPCODE_OP_IMM} };
+    parameter logic [31:0] INSN_SLTI    = { 17'h?,             3'b010, 5'h?, {OPCODE_OP_IMM} };
+    parameter logic [31:0] INSN_SLTIU   = { 17'h?,             3'b011, 5'h?, {OPCODE_OP_IMM} };
+    parameter logic [31:0] INSN_XORI    = { 17'h?,             3'b100, 5'h?, {OPCODE_OP_IMM} };
+    parameter logic [31:0] INSN_ORI     = { 17'h?,             3'b110, 5'h?, {OPCODE_OP_IMM} };
+    parameter logic [31:0] INSN_ANDI    = { 17'h?,             3'b111, 5'h?, {OPCODE_OP_IMM} };
+    parameter logic [31:0] INSN_SLLI    = { 7'b0000000, 10'h?, 3'b001, 5'h?, {OPCODE_OP_IMM} };
+    parameter logic [31:0] INSN_SRLI    = { 7'b0000000, 10'h?, 3'b101, 5'h?, {OPCODE_OP_IMM} };
+    parameter logic [31:0] INSN_SRAI    = { 7'b0100000, 10'h?, 3'b101, 5'h?, {OPCODE_OP_IMM} };
+
+    // OP
+    parameter logic [31:0] INSN_ADD     = { 7'b0000000, 10'h?, 3'b000, 5'h?, {OPCODE_OP} };
+    parameter logic [31:0] INSN_SUB     = { 7'b0100000, 10'h?, 3'b000, 5'h?, {OPCODE_OP} };
+    parameter logic [31:0] INSN_SLL     = { 7'b0000000, 10'h?, 3'b001, 5'h?, {OPCODE_OP} };
+    parameter logic [31:0] INSN_SLT     = { 7'b0000000, 10'h?, 3'b010, 5'h?, {OPCODE_OP} };
+    parameter logic [31:0] INSN_SLTU    = { 7'b0000000, 10'h?, 3'b011, 5'h?, {OPCODE_OP} };
+    parameter logic [31:0] INSN_XOR     = { 7'b0000000, 10'h?, 3'b100, 5'h?, {OPCODE_OP} };
+    parameter logic [31:0] INSN_SRL     = { 7'b0000000, 10'h?, 3'b101, 5'h?, {OPCODE_OP} };
+    parameter logic [31:0] INSN_SRA     = { 7'b0100000, 10'h?, 3'b101, 5'h?, {OPCODE_OP} };
+    parameter logic [31:0] INSN_OR      = { 7'b0000000, 10'h?, 3'b110, 5'h?, {OPCODE_OP} };
+    parameter logic [31:0] INSN_AND     = { 7'b0000000, 10'h?, 3'b111, 5'h?, {OPCODE_OP} };
+
+    // SYSTEM
+    parameter logic [31:0] INSN_CSRRW   = { 17'h?,             3'b001, 5'h?, {OPCODE_SYSTEM} };
+    parameter logic [31:0] INSN_CSRRS   = { 17'h?,             3'b010, 5'h?, {OPCODE_SYSTEM} };
+    parameter logic [31:0] INSN_CSRRC   = { 17'h?,             3'b011, 5'h?, {OPCODE_SYSTEM} };
+    parameter logic [31:0] INSN_CSRRWI  = { 17'h?,             3'b101, 5'h?, {OPCODE_SYSTEM} };
+    parameter logic [31:0] INSN_CSRRSI  = { 17'h?,             3'b110, 5'h?, {OPCODE_SYSTEM} };
+    parameter logic [31:0] INSN_CSRRCI  = { 17'h?,             3'b111, 5'h?, {OPCODE_SYSTEM} };
+    parameter logic [31:0] INSN_ECALL   = { 12'b000000000000,         13'b0, {OPCODE_SYSTEM} };
+    parameter logic [31:0] INSN_EBREAK  = { 12'b000000000001,         13'b0, {OPCODE_SYSTEM} };
+    parameter logic [31:0] INSN_MRET    = { 12'b001100000010,         13'b0, {OPCODE_SYSTEM} };
+    parameter logic [31:0] INSN_DRET    = { 12'b011110110010,         13'b0, {OPCODE_SYSTEM} };
+    parameter logic [31:0] INSN_WFI     = { 12'b000100000101,         13'b0, {OPCODE_SYSTEM} };
+
+    // RV32M
+    parameter logic [31:0] INSN_MUL     = { 7'b0000001, 10'h?, 3'b000, 5'h?, {OPCODE_OP} };
+    parameter logic [31:0] INSN_MULH    = { 7'b0000001, 10'h?, 3'b001, 5'h?, {OPCODE_OP} };
+    parameter logic [31:0] INSN_MULHSU  = { 7'b0000001, 10'h?, 3'b010, 5'h?, {OPCODE_OP} };
+    parameter logic [31:0] INSN_MULHU   = { 7'b0000001, 10'h?, 3'b011, 5'h?, {OPCODE_OP} };
+    parameter logic [31:0] INSN_DIV     = { 7'b0000001, 10'h?, 3'b100, 5'h?, {OPCODE_OP} };
+    parameter logic [31:0] INSN_DIVU    = { 7'b0000001, 10'h?, 3'b101, 5'h?, {OPCODE_OP} };
+    parameter logic [31:0] INSN_REM     = { 7'b0000001, 10'h?, 3'b110, 5'h?, {OPCODE_OP} };
+    parameter logic [31:0] INSN_REMU    = { 7'b0000001, 10'h?, 3'b111, 5'h?, {OPCODE_OP} };
+
+    // LOAD & STORE
+    parameter logic [31:0] INSN_LOAD    = {25'h?,                            {OPCODE_LOAD } };
+    parameter logic [31:0] INSN_STORE   = {25'h?,                            {OPCODE_STORE} };
+
+    // MISC-MEM
+    parameter logic [31:0] INSN_FENCE   = { 17'h?,             3'b000, 5'h?, {OPCODE_MISC_MEM} };
+    parameter logic [31:0] INSN_FENCEI  = { 17'h0,             3'b001, 5'h0, {OPCODE_MISC_MEM} };
+
+    // Get a CSR name for a CSR address.
+    function automatic string get_csr_name(input logic [11:0] csr_addr);
+        unique case (csr_addr)
+            12'd0: return "ustatus";
+            12'd4: return "uie";
+            12'd5: return "utvec";
+            12'd64: return "uscratch";
+            12'd65: return "uepc";
+            12'd66: return "ucause";
+            12'd67: return "utval";
+            12'd68: return "uip";
+            12'd1: return "fflags";
+            12'd2: return "frm";
+            12'd3: return "fcsr";
+            12'd3072: return "cycle";
+            12'd3073: return "time";
+            12'd3074: return "instret";
+            12'd3075: return "hpmcounter3";
+            12'd3076: return "hpmcounter4";
+            12'd3077: return "hpmcounter5";
+            12'd3078: return "hpmcounter6";
+            12'd3079: return "hpmcounter7";
+            12'd3080: return "hpmcounter8";
+            12'd3081: return "hpmcounter9";
+            12'd3082: return "hpmcounter10";
+            12'd3083: return "hpmcounter11";
+            12'd3084: return "hpmcounter12";
+            12'd3085: return "hpmcounter13";
+            12'd3086: return "hpmcounter14";
+            12'd3087: return "hpmcounter15";
+            12'd3088: return "hpmcounter16";
+            12'd3089: return "hpmcounter17";
+            12'd3090: return "hpmcounter18";
+            12'd3091: return "hpmcounter19";
+            12'd3092: return "hpmcounter20";
+            12'd3093: return "hpmcounter21";
+            12'd3094: return "hpmcounter22";
+            12'd3095: return "hpmcounter23";
+            12'd3096: return "hpmcounter24";
+            12'd3097: return "hpmcounter25";
+            12'd3098: return "hpmcounter26";
+            12'd3099: return "hpmcounter27";
+            12'd3100: return "hpmcounter28";
+            12'd3101: return "hpmcounter29";
+            12'd3102: return "hpmcounter30";
+            12'd3103: return "hpmcounter31";
+            12'd3200: return "cycleh";
+            12'd3201: return "timeh";
+            12'd3202: return "instreth";
+            12'd3203: return "hpmcounter3h";
+            12'd3204: return "hpmcounter4h";
+            12'd3205: return "hpmcounter5h";
+            12'd3206: return "hpmcounter6h";
+            12'd3207: return "hpmcounter7h";
+            12'd3208: return "hpmcounter8h";
+            12'd3209: return "hpmcounter9h";
+            12'd3210: return "hpmcounter10h";
+            12'd3211: return "hpmcounter11h";
+            12'd3212: return "hpmcounter12h";
+            12'd3213: return "hpmcounter13h";
+            12'd3214: return "hpmcounter14h";
+            12'd3215: return "hpmcounter15h";
+            12'd3216: return "hpmcounter16h";
+            12'd3217: return "hpmcounter17h";
+            12'd3218: return "hpmcounter18h";
+            12'd3219: return "hpmcounter19h";
+            12'd3220: return "hpmcounter20h";
+            12'd3221: return "hpmcounter21h";
+            12'd3222: return "hpmcounter22h";
+            12'd3223: return "hpmcounter23h";
+            12'd3224: return "hpmcounter24h";
+            12'd3225: return "hpmcounter25h";
+            12'd3226: return "hpmcounter26h";
+            12'd3227: return "hpmcounter27h";
+            12'd3228: return "hpmcounter28h";
+            12'd3229: return "hpmcounter29h";
+            12'd3230: return "hpmcounter30h";
+            12'd3231: return "hpmcounter31h";
+            12'd256: return "sstatus";
+            12'd258: return "sedeleg";
+            12'd259: return "sideleg";
+            12'd260: return "sie";
+            12'd261: return "stvec";
+            12'd262: return "scounteren";
+            12'd320: return "sscratch";
+            12'd321: return "sepc";
+            12'd322: return "scause";
+            12'd323: return "stval";
+            12'd324: return "sip";
+            12'd384: return "satp";
+            12'd3857: return "mvendorid";
+            12'd3858: return "marchid";
+            12'd3859: return "mimpid";
+            12'd3860: return "mhartid";
+            12'd768: return "mstatus";
+            12'd769: return "misa";
+            12'd770: return "medeleg";
+            12'd771: return "mideleg";
+            12'd772: return "mie";
+            12'd773: return "mtvec";
+            12'd774: return "mcounteren";
+            12'd832: return "mscratch";
+            12'd833: return "mepc";
+            12'd834: return "mcause";
+            12'd835: return "mtval";
+            12'd836: return "mip";
+            12'd928: return "pmpcfg0";
+            12'd929: return "pmpcfg1";
+            12'd930: return "pmpcfg2";
+            12'd931: return "pmpcfg3";
+            12'd944: return "pmpaddr0";
+            12'd945: return "pmpaddr1";
+            12'd946: return "pmpaddr2";
+            12'd947: return "pmpaddr3";
+            12'd948: return "pmpaddr4";
+            12'd949: return "pmpaddr5";
+            12'd950: return "pmpaddr6";
+            12'd951: return "pmpaddr7";
+            12'd952: return "pmpaddr8";
+            12'd953: return "pmpaddr9";
+            12'd954: return "pmpaddr10";
+            12'd955: return "pmpaddr11";
+            12'd956: return "pmpaddr12";
+            12'd957: return "pmpaddr13";
+            12'd958: return "pmpaddr14";
+            12'd959: return "pmpaddr15";
+            12'd2816: return "mcycle";
+            12'd2818: return "minstret";
+            12'd2819: return "mhpmcounter3";
+            12'd2820: return "mhpmcounter4";
+            12'd2821: return "mhpmcounter5";
+            12'd2822: return "mhpmcounter6";
+            12'd2823: return "mhpmcounter7";
+            12'd2824: return "mhpmcounter8";
+            12'd2825: return "mhpmcounter9";
+            12'd2826: return "mhpmcounter10";
+            12'd2827: return "mhpmcounter11";
+            12'd2828: return "mhpmcounter12";
+            12'd2829: return "mhpmcounter13";
+            12'd2830: return "mhpmcounter14";
+            12'd2831: return "mhpmcounter15";
+            12'd2832: return "mhpmcounter16";
+            12'd2833: return "mhpmcounter17";
+            12'd2834: return "mhpmcounter18";
+            12'd2835: return "mhpmcounter19";
+            12'd2836: return "mhpmcounter20";
+            12'd2837: return "mhpmcounter21";
+            12'd2838: return "mhpmcounter22";
+            12'd2839: return "mhpmcounter23";
+            12'd2840: return "mhpmcounter24";
+            12'd2841: return "mhpmcounter25";
+            12'd2842: return "mhpmcounter26";
+            12'd2843: return "mhpmcounter27";
+            12'd2844: return "mhpmcounter28";
+            12'd2845: return "mhpmcounter29";
+            12'd2846: return "mhpmcounter30";
+            12'd2847: return "mhpmcounter31";
+            12'd2944: return "mcycleh";
+            12'd2946: return "minstreth";
+            12'd2947: return "mhpmcounter3h";
+            12'd2948: return "mhpmcounter4h";
+            12'd2949: return "mhpmcounter5h";
+            12'd2950: return "mhpmcounter6h";
+            12'd2951: return "mhpmcounter7h";
+            12'd2952: return "mhpmcounter8h";
+            12'd2953: return "mhpmcounter9h";
+            12'd2954: return "mhpmcounter10h";
+            12'd2955: return "mhpmcounter11h";
+            12'd2956: return "mhpmcounter12h";
+            12'd2957: return "mhpmcounter13h";
+            12'd2958: return "mhpmcounter14h";
+            12'd2959: return "mhpmcounter15h";
+            12'd2960: return "mhpmcounter16h";
+            12'd2961: return "mhpmcounter17h";
+            12'd2962: return "mhpmcounter18h";
+            12'd2963: return "mhpmcounter19h";
+            12'd2964: return "mhpmcounter20h";
+            12'd2965: return "mhpmcounter21h";
+            12'd2966: return "mhpmcounter22h";
+            12'd2967: return "mhpmcounter23h";
+            12'd2968: return "mhpmcounter24h";
+            12'd2969: return "mhpmcounter25h";
+            12'd2970: return "mhpmcounter26h";
+            12'd2971: return "mhpmcounter27h";
+            12'd2972: return "mhpmcounter28h";
+            12'd2973: return "mhpmcounter29h";
+            12'd2974: return "mhpmcounter30h";
+            12'd2975: return "mhpmcounter31h";
+            12'd803: return "mhpmevent3";
+            12'd804: return "mhpmevent4";
+            12'd805: return "mhpmevent5";
+            12'd806: return "mhpmevent6";
+            12'd807: return "mhpmevent7";
+            12'd808: return "mhpmevent8";
+            12'd809: return "mhpmevent9";
+            12'd810: return "mhpmevent10";
+            12'd811: return "mhpmevent11";
+            12'd812: return "mhpmevent12";
+            12'd813: return "mhpmevent13";
+            12'd814: return "mhpmevent14";
+            12'd815: return "mhpmevent15";
+            12'd816: return "mhpmevent16";
+            12'd817: return "mhpmevent17";
+            12'd818: return "mhpmevent18";
+            12'd819: return "mhpmevent19";
+            12'd820: return "mhpmevent20";
+            12'd821: return "mhpmevent21";
+            12'd822: return "mhpmevent22";
+            12'd823: return "mhpmevent23";
+            12'd824: return "mhpmevent24";
+            12'd825: return "mhpmevent25";
+            12'd826: return "mhpmevent26";
+            12'd827: return "mhpmevent27";
+            12'd828: return "mhpmevent28";
+            12'd829: return "mhpmevent29";
+            12'd830: return "mhpmevent30";
+            12'd831: return "mhpmevent31";
+            12'd1952: return "tselect";
+            12'd1953: return "tdata1";
+            12'd1954: return "tdata2";
+            12'd1955: return "tdata3";
+            12'd1968: return "dcsr";
+            12'd1969: return "dpc";
+            12'd1970: return "dscratch0";
+            12'd1971: return "dscratch1";
+            12'd512: return "hstatus";
+            12'd514: return "hedeleg";
+            12'd515: return "hideleg";
+            12'd516: return "hie";
+            12'd517: return "htvec";
+            12'd576: return "hscratch";
+            12'd577: return "hepc";
+            12'd578: return "hcause";
+            12'd579: return "hbadaddr";
+            12'd580: return "hip";
+            12'd896: return "mbase";
+            12'd897: return "mbound";
+            12'd898: return "mibase";
+            12'd899: return "mibound";
+            12'd900: return "mdbase";
+            12'd901: return "mdbound";
+            12'd800: return "mcountinhibit";
+            default: return $sformatf("0x%x", csr_addr);
+        endcase
+    endfunction
+
+
+    int unsigned  cycle;
+    string        decoded_str;
+    int           file_handle;
+    string        file_name;
+
+    logic[4:0] rd_addr = inst_i[11:7];
+    logic[4:0] rs1_addr = inst_i[19:15];
+    logic[4:0] rs2_addr = inst_i[24:20];
+
+
+    function automatic void decode_u_insn(input string mnemonic);
+        decoded_str = $sformatf("%s x%0d,0x%0x", mnemonic, rd_addr, {inst_i[31:12]});
+    endfunction
+
+    function automatic void decode_j_insn(input string mnemonic);
+        decoded_str = $sformatf("%s x%0d,%0x", mnemonic, rd_addr, 
+            {{12{inst_i[31]}}, inst_i[19:12], inst_i[20], inst_i[30:21], 1'b0});
+    endfunction
+
+    function automatic void decode_i_jalr_insn(input string mnemonic);
+        decoded_str = $sformatf("%s x%0d,%0d(x%0d)", mnemonic, rd_addr,
+            $signed({{20 {inst_i[31]}}, inst_i[31:20]}), rs1_addr);
+    endfunction
+
+    function automatic void decode_b_insn(input string mnemonic);
+        logic [31:0] branch_target;
+        logic [31:0] imm;
+
+        // We cannot use rvfi_pc_wdata for conditional jumps.
+        imm = $signed({ {19 {inst_i[31]}}, inst_i[31], inst_i[7],
+                 inst_i[30:25], inst_i[11:8], 1'b0 });
+        branch_target = pc_i + imm;
+
+        decoded_str = $sformatf("%s x%0d,x%0d,%0x", mnemonic, rs1_addr, rs2_addr, branch_target);
+    endfunction
+
+    function automatic void decode_i_insn(input string mnemonic);
+        decoded_str = $sformatf("%s x%0d,x%0d,%0d", mnemonic, rd_addr, rs1_addr,
+                        $signed({{20 {inst_i[31]}}, inst_i[31:20]}));
+    endfunction
+
+    function automatic void decode_i_shift_insn(input string mnemonic);
+        logic [4:0] shamt;
+
+        shamt = {inst_i[24:20]};
+        decoded_str = $sformatf("%s x%0d,x%0d,0x%0x", mnemonic, rd_addr, rs1_addr, shamt);
+    endfunction
+
+    function automatic void decode_r_insn(input string mnemonic);
+        decoded_str = $sformatf("%s x%0d,x%0d,x%0d", mnemonic, rd_addr, rs1_addr, rs2_addr);
+    endfunction
+
+    function automatic void decode_csr_insn(input string mnemonic);
+        logic [11:0] csr;
+        string csr_name;
+
+        csr = inst_i[31:20];
+        csr_name = get_csr_name(csr);
+
+        if (!inst_i[14]) begin
+            decoded_str = $sformatf("%s x%0d,%s,x%0d", mnemonic, rd_addr, csr_name, rs1_addr);
+        end else begin
+            decoded_str = $sformatf("%s x%0d,%s,%0d", mnemonic, rd_addr, csr_name, { 27'b0, inst_i[19:15]});
+        end
+    endfunction
+
+    function automatic void decode_mnemonic(input string mnemonic);
+        decoded_str = mnemonic;
+    endfunction
+
+    function automatic void decode_load_insn();
+        string      mnemonic;
+
+        logic [2:0] size;
+        size = inst_i[14:12];
+        if (size == 3'b000) begin
+            mnemonic = "lb";
+        end else if (size == 3'b001) begin
+            mnemonic = "lh";
+        end else if (size == 3'b010) begin
+            mnemonic = "lw";
+        end else if (size == 3'b100) begin
+            mnemonic = "lbu";
+        end else if (size == 3'b101) begin
+            mnemonic = "lhu";
+        end else begin
+            decode_mnemonic("INVALID");
+            return;
+        end
+
+        decoded_str = $sformatf("%s x%0d,%0d(x%0d)", mnemonic, rd_addr,
+                    $signed({{20 {inst_i[31]}}, inst_i[31:20]}), rs1_addr);
+    endfunction
+
+    function automatic void decode_store_insn();
+        string    mnemonic;
+
+        if (inst_i[13:12] == 2'b00) begin
+            mnemonic = "sb";
+        end else if (inst_i[13:12] == 2'b01) begin
+            mnemonic = "sh";
+        end else if (inst_i[13:12] == 2'b10) begin
+            mnemonic = "sw";
+        end else begin
+            decode_mnemonic("INVALID");
+            return;
+        end
+
+        if (!inst_i[14]) begin
+            decoded_str = $sformatf("%s x%0d,%0d(x%0d)", mnemonic, rs2_addr,
+                        $signed({ {20 {inst_i[31]}}, inst_i[31:25], inst_i[11:7] }), rs1_addr);
+        end else begin
+            decode_mnemonic("INVALID");
+        end
+    endfunction
+
+    function automatic string get_fence_description(logic [3:0] bits);
+        string desc = "";
+
+        if (bits[3]) begin
+            desc = {desc, "i"};
+        end
+        if (bits[2]) begin
+            desc = {desc, "o"};
+        end
+        if (bits[1]) begin
+            desc = {desc, "r"};
+        end
+        if (bits[0]) begin
+            desc = {desc, "w"};
+        end
+        return desc;
+    endfunction
+
+    function automatic void decode_fence();
+        string predecessor;
+        string successor;
+
+        predecessor = get_fence_description(inst_i[27:24]);
+        successor = get_fence_description(inst_i[23:20]);
+        decoded_str = $sformatf("fence %s,%s", predecessor, successor);
+    endfunction
+
+
+    always_comb begin
+        decoded_str = "";
+
+        unique casez (inst_i)
+            INSN_LUI:        decode_u_insn("lui");
+            INSN_AUIPC:      decode_u_insn("auipc");
+            INSN_JAL:        decode_j_insn("jal");
+            INSN_JALR:       decode_i_jalr_insn("jalr");
+            // BRANCH
+            INSN_BEQ:        decode_b_insn("beq");
+            INSN_BNE:        decode_b_insn("bne");
+            INSN_BLT:        decode_b_insn("blt");
+            INSN_BGE:        decode_b_insn("bge");
+            INSN_BLTU:       decode_b_insn("bltu");
+            INSN_BGEU:       decode_b_insn("bgeu");
+            // OPIMM
+            INSN_ADDI: begin
+                if (inst_i == 32'h00_00_00_13) begin
+                    decode_mnemonic("nop");
+                end else begin
+                    decode_i_insn("addi");
+                end
+            end
+            INSN_SLTI:       decode_i_insn("slti");
+            INSN_SLTIU:      decode_i_insn("sltiu");
+            INSN_XORI:       decode_i_insn("xori");
+            INSN_ORI:        decode_i_insn("ori");
+            INSN_ANDI:       decode_i_insn("andi");
+            INSN_SLLI:       decode_i_shift_insn("slli");
+            INSN_SRLI:       decode_i_shift_insn("srli");
+            INSN_SRAI:       decode_i_shift_insn("srai");
+            // OP
+            INSN_ADD:        decode_r_insn("add");
+            INSN_SUB:        decode_r_insn("sub");
+            INSN_SLL:        decode_r_insn("sll");
+            INSN_SLT:        decode_r_insn("slt");
+            INSN_SLTU:       decode_r_insn("sltu");
+            INSN_XOR:        decode_r_insn("xor");
+            INSN_SRL:        decode_r_insn("srl");
+            INSN_SRA:        decode_r_insn("sra");
+            INSN_OR:         decode_r_insn("or");
+            INSN_AND:        decode_r_insn("and");
+            // SYSTEM (CSR manipulation)
+            INSN_CSRRW:      decode_csr_insn("csrrw");
+            INSN_CSRRS:      decode_csr_insn("csrrs");
+            INSN_CSRRC:      decode_csr_insn("csrrc");
+            INSN_CSRRWI:     decode_csr_insn("csrrwi");
+            INSN_CSRRSI:     decode_csr_insn("csrrsi");
+            INSN_CSRRCI:     decode_csr_insn("csrrci");
+            // SYSTEM (others)
+            INSN_ECALL:      decode_mnemonic("ecall");
+            INSN_EBREAK:     decode_mnemonic("ebreak");
+            INSN_MRET:       decode_mnemonic("mret");
+            INSN_DRET:       decode_mnemonic("dret");
+            INSN_WFI:        decode_mnemonic("wfi");
+            // RV32M
+            INSN_MUL:        decode_r_insn("mul");
+            INSN_MULH:       decode_r_insn("mulh");
+            INSN_MULHSU:     decode_r_insn("mulhsu");
+            INSN_MULHU:      decode_r_insn("mulhu");
+            INSN_DIV:        decode_r_insn("div");
+            INSN_DIVU:       decode_r_insn("divu");
+            INSN_REM:        decode_r_insn("rem");
+            INSN_REMU:       decode_r_insn("remu");
+            // LOAD & STORE
+            INSN_LOAD:       decode_load_insn();
+            INSN_STORE:      decode_store_insn();
+            // MISC-MEM
+            INSN_FENCE:      decode_fence();
+            INSN_FENCEI:     decode_mnemonic("fence.i");
+            default:         decode_mnemonic("INVALID");
+        endcase
+    end
+
+
+
+    initial begin
+        string file_name_base = "trace_core";
+        $sformat(file_name, "%s.log", file_name_base);
+
+        $display("Writing execution trace to %s", file_name);
+        file_handle = $fopen(file_name, "w");
+        $fwrite(file_handle, "\t\t\tTime\t\tCycle\tPC\t\t\tInsn\t\tDecoded instruction\n");
+        $fflush(file_handle);
+    end
+
+
+    function automatic void printbuffer_dumpline();
+        string insn_str = $sformatf("%h", inst_i);
+
+        $fwrite(file_handle, "%15t\t%d\t\t%h\t%s\t%s", $time, cycle, pc_i, insn_str, decoded_str);
+        $fwrite(file_handle, "\n");
+        $fflush(file_handle);
+    endfunction
+
+    // log execution
+    always @(posedge clk) begin
+        if (inst_valid_i) begin
+            printbuffer_dumpline();
+        end
+    end
+
+    // cycle counter
+    always @(posedge clk or negedge rst_n) begin
+        if (!rst_n) begin
+            cycle <= 0;
+        end else begin
+            cycle <= cycle + 1;
+        end
+    end
+
+endmodule

rtl/debug/debug_rom.sv

@@ -0,0 +1,88 @@
+ /*                                                                      
+ Copyright 2021 Blue Liang, liangkangnan@163.com
+                                                                         
+ Licensed under the Apache License, Version 2.0 (the "License");         
+ you may not use this file except in compliance with the License.        
+ You may obtain a copy of the License at                                 
+                                                                         
+     http://www.apache.org/licenses/LICENSE-2.0                          
+                                                                         
+ Unless required by applicable law or agreed to in writing, software    
+ distributed under the License is distributed on an "AS IS" BASIS,       
+ WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ See the License for the specific language governing permissions and     
+ limitations under the License.                                          
+ */
+
+module debug_rom (
+    input  wire         clk_i,
+    input  wire         req_i,
+    input  wire [31:0]  addr_i,
+    output wire [31:0]  rdata_o
+    );
+
+    localparam RomSize = 38;
+
+    wire [RomSize-1:0][31:0] mem;
+
+    assign mem = {
+        32'h00000000,
+        32'h7b200073,
+        32'h7b202473,
+        32'h7b302573,
+        32'h10852423,
+        32'hf1402473,
+        32'ha85ff06f,
+        32'h7b202473,
+        32'h7b302573,
+        32'h10052223,
+        32'h00100073,
+        32'h7b202473,
+        32'h7b302573,
+        32'h10052623,
+        32'h00c51513,
+        32'h00c55513,
+        32'h00000517,
+        32'hfd5ff06f,
+        32'hfa041ce3,
+        32'h00247413,
+        32'h40044403,
+        32'h00a40433,
+        32'hf1402473,
+        32'h02041c63,
+        32'h00147413,
+        32'h40044403,
+        32'h00a40433,
+        32'h10852023,
+        32'hf1402473,
+        32'h00c51513,
+        32'h00c55513,
+        32'h00000517,
+        32'h7b351073,
+        32'h7b241073,
+        32'h0ff0000f,
+        32'h04c0006f,
+        32'h07c0006f,
+        32'h00c0006f
+    };
+
+    reg [5:0] addr_q;
+
+    always @ (posedge clk_i) begin
+        if (req_i) begin
+            addr_q <= addr_i[7:2];
+        end
+    end
+
+    reg[31:0] rdata;
+
+    always @ (*) begin
+        rdata = 32'h0;
+        if (addr_q < 6'd38) begin
+            rdata = mem[addr_q];
+        end
+    end
+
+    assign rdata_o = rdata;
+
+endmodule

rtl/debug/jtag_def.sv

@@ -0,0 +1,155 @@
+ /*                                                                      
+ Copyright 2021 Blue Liang, liangkangnan@163.com
+                                                                         
+ Licensed under the Apache License, Version 2.0 (the "License");         
+ you may not use this file except in compliance with the License.        
+ You may obtain a copy of the License at                                 
+                                                                         
+     http://www.apache.org/licenses/LICENSE-2.0                          
+                                                                         
+ Unless required by applicable law or agreed to in writing, software    
+ distributed under the License is distributed on an "AS IS" BASIS,       
+ WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ See the License for the specific language governing permissions and     
+ limitations under the License.                                          
+ */
+
+
+`define DbgVersion013       4'h2
+`define ProgBufSize         5'h8
+`define DataCount           4'h1
+`define HaltAddress         64'h800
+`define ResumeAddress       `HaltAddress + 4
+`define ExceptionAddress    `HaltAddress + 8
+`define DataBaseAddr        12'h380
+`define AbstCmdBaseAddr     12'h338
+`define AbstCmdCount        12'd10
+`define ProgbufBaseAddr     `AbstCmdBaseAddr + (4 * `AbstCmdCount)
+
+// dmi op
+`define DMI_OP_NOP          2'b00
+`define DMI_OP_READ         2'b01
+`define DMI_OP_WRITE        2'b10
+
+// DM regs addr
+`define Data0               7'h04
+`define Data1               7'h05
+`define Data2               7'h06
+`define Data3               7'h07
+`define Data4               7'h08
+`define DMControl           7'h10
+`define DMStatus            7'h11
+`define Hartinfo            7'h12
+`define AbstractCS          7'h16
+`define Command             7'h17
+`define AbstractAuto        7'h18
+`define ProgBuf0            7'h20
+`define ProgBuf1            7'h21
+`define ProgBuf2            7'h22
+`define ProgBuf3            7'h23
+`define ProgBuf4            7'h24
+`define ProgBuf5            7'h25
+`define ProgBuf6            7'h26
+`define ProgBuf7            7'h27
+`define ProgBuf8            7'h28
+`define ProgBuf9            7'h29
+`define ProgBuf10           7'h2A
+`define ProgBuf11           7'h2B
+`define ProgBuf12           7'h2C
+`define ProgBuf13           7'h2D
+`define ProgBuf14           7'h2E
+`define ProgBuf15           7'h2F
+`define SBAddress3          7'h37
+`define SBCS                7'h38
+`define SBAddress0          7'h39
+`define SBAddress1          7'h3A
+`define SBAddress2          7'h3B
+`define SBData0             7'h3C
+`define SBData1             7'h3D
+`define SBData2             7'h3E
+`define SBData3             7'h3F
+`define HaltSum0            7'h40
+`define HaltSum1            7'h13
+
+// dmstatus bit index
+`define Impebreak           22
+`define Allhavereset        19
+`define Anyhavereset        18
+`define Allresumeack        17
+`define Anyresumeack        16
+`define Allnonexistent      15
+`define Anynonexistent      14
+`define Allunavail          13
+`define Anyunavail          12
+`define Allrunning          11
+`define Anyrunning          10
+`define Allhalted           9
+`define Anyhalted           8
+`define Authenticated       7
+`define Authbusy            6
+`define Hasresethaltreq     5
+`define Confstrptrvalid     4
+`define Version             3:0
+
+// dmcontrol bit index
+`define Haltreq             31
+`define Resumereq           30
+`define Hartreset           29
+`define Ackhavereset        28
+`define Hasel               26
+`define Hartsello           25:16
+`define Hartselhi           15:6
+`define Setresethaltreq     3
+`define Clrresethaltreq     2
+`define Ndmreset            1
+`define Dmactive            0
+
+// abstractcs bit index
+`define Progbufsize         28:24
+`define Busy                12
+`define Cmderr              10:8
+`define Datacount           3:0
+
+// abstract command access register bit index
+`define Cmdtype             31:24
+`define Aarsize             22:20
+`define Aarpostincrement    19
+`define Postexec            18
+`define Transfer            17
+`define Write               16
+`define Regno               15:0
+
+// sbcs bit index
+`define Sbversion           31:29
+`define Sbbusyerror         22
+`define Sbbusy              21
+`define Sbreadonaddr        20
+`define Sbaccess            19:17
+`define Sbautoincrement     16
+`define Sbreadondata        15
+`define Sberror             14:12
+`define Sbasize             11:5
+`define Sbaccess128         4
+`define Sbaccess64          3
+`define Sbaccess32          2
+`define Sbaccess16          1
+`define Sbaccess8           0
+
+// abstractauto
+`define AutoexecData        11:0
+`define AutoexecProgbuf     31:16
+
+`define CSR_CYCLE       12'hc00
+`define CSR_CYCLEH      12'hc80
+`define CSR_MTVEC       12'h305
+`define CSR_MCAUSE      12'h342
+`define CSR_MEPC        12'h341
+`define CSR_MIE         12'h304
+`define CSR_MSTATUS     12'h300
+`define CSR_MSCRATCH    12'h340
+`define CSR_MHARTID     12'hF14
+`define CSR_DCSR        12'h7b0
+`define CSR_DPC         12'h7b1
+`define CSR_DSCRATCH0   12'h7b2
+`define CSR_DSCRATCH1   12'h7b3
+

rtl/debug/jtag_dm.sv

@@ -0,0 +1,533 @@
+ /*                                                                      
+ Copyright 2020 Blue Liang, liangkangnan@163.com
+                                                                         
+ Licensed under the Apache License, Version 2.0 (the "License");         
+ you may not use this file except in compliance with the License.        
+ You may obtain a copy of the License at                                 
+                                                                         
+     http://www.apache.org/licenses/LICENSE-2.0                          
+                                                                         
+ Unless required by applicable law or agreed to in writing, software    
+ distributed under the License is distributed on an "AS IS" BASIS,       
+ WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ See the License for the specific language governing permissions and     
+ limitations under the License.                                          
+ */
+
+`include "jtag_def.sv"
+
+module jtag_dm #(
+    parameter DMI_ADDR_BITS  = 7,
+    parameter DMI_DATA_BITS  = 32,
+    parameter DMI_OP_BITS    = 2,
+    parameter DMI_REQ_BITS  = DMI_ADDR_BITS + DMI_DATA_BITS + DMI_OP_BITS,
+    parameter DMI_RESP_BITS = DMI_REQ_BITS
+    )(
+
+    input wire                      clk,
+    input wire                      rst_n,
+
+    // from DMI
+    input  wire [DMI_REQ_BITS-1:0]  dmi_data_i,
+    input  wire                     dmi_valid_i,
+    output wire                     dm_ready_o,
+
+    // to DMI
+    output wire [DMI_RESP_BITS-1:0] dm_data_o,
+    output wire                     dm_valid_o,
+    input  wire                     dmi_ready_i,
+
+    output wire                     debug_req_o,
+    output wire                     ndmreset_o,
+    output wire                     halted_o,
+
+    // jtag access mem devices(DM as master)
+    output wire                     master_req_o,
+    input  wire                     master_gnt_i,
+    input  wire                     master_rvalid_i,
+    output wire                     master_we_o,
+    output wire [3:0]               master_be_o,
+    output wire [31:0]              master_addr_o,
+    output wire [31:0]              master_wdata_o,
+    input  wire [31:0]              master_rdata_i,
+    input  wire                     master_err_i,
+
+    // core fetch instr or mem(DM as slave)
+    input  wire                     slave_req_i,
+    input  wire                     slave_we_i,
+    input  wire [31:0]              slave_addr_i,
+    input  wire [3:0]               slave_be_i,
+    input  wire [31:0]              slave_wdata_i,
+    output wire                     slave_gnt_o,
+    output wire                     slave_rvalid_o,
+    output wire [31:0]              slave_rdata_o
+
+    );
+
+    localparam HARTINFO = {8'h0, 4'h2, 3'b0, 1'b1, `DataCount, `DataBaseAddr};
+
+    localparam CmdErrorNone         = 3'h0;
+    localparam CmdErrorBusy         = 3'h1;
+
+    wire halted;
+    wire resumeack;
+    wire sbbusy;
+    wire[2:0] sberror;
+    wire[DMI_OP_BITS-1:0] dm_op;
+    wire[DMI_ADDR_BITS-1:0] dm_op_addr;
+    wire[DMI_DATA_BITS-1:0] dm_op_data;
+
+    reg havereset_d, havereset_q;
+    reg clear_resumeack;
+    reg sbaddress_write_valid;
+    reg sbdata_write_valid;
+    reg sbdata_read_valid;
+    reg[31:0] sbcs;
+    reg[31:0] a_abstractcs;
+    reg[31:0] dm_resp_data_d, dm_resp_data_q;
+    reg cmd_valid_d, cmd_valid_q;
+    reg[15:0] abstractautoprogbuf;
+    reg[3:0] progbuf_index;
+    wire[31:0] sba_sbaddress;
+    wire[31:0] dm_sbaddress;
+    wire resumereq;
+    wire cmdbusy;
+    wire sbdata_valid;
+    wire[31:0] sbdata;
+    wire[19:0] hartsel;
+    wire data_valid;
+    wire[31:0] data0;
+    wire cmderror_valid;
+    wire[2:0] cmderror;
+
+    // DM regs
+    reg[31:0] dmstatus;
+    reg[31:0] dmcontrol_d, dmcontrol_q;
+    reg[31:0] abstractcs;
+    reg[31:0] abstractauto_d, abstractauto_q;
+    reg[31:0] sbcs_d, sbcs_q;
+    reg[31:0] sbdata0_d, sbdata0_q;
+    reg[31:0] sbaddress0_d, sbaddress0_q;
+    reg[31:0] command_d, command_q;
+    reg[31:0] data0_d, data0_q;
+    reg[2:0] cmderr_d, cmderr_q;
+    reg[`ProgBufSize-1:0][31:0] progbuf_d, progbuf_q;
+
+    assign dm_sbaddress = sbaddress0_q;
+
+    assign hartsel = {dmcontrol_q[`Hartselhi], dmcontrol_q[`Hartsello]};
+
+    assign dm_op      = dmi_data_i[DMI_OP_BITS-1:0];
+    assign dm_op_addr = dmi_data_i[DMI_REQ_BITS-1:DMI_DATA_BITS+DMI_OP_BITS];
+    assign dm_op_data = dmi_data_i[DMI_DATA_BITS+DMI_OP_BITS-1:DMI_OP_BITS];
+
+
+    localparam S_REQ  = 2'b01;
+    localparam S_RESP = 2'b10; 
+
+    reg[2:0] req_state_d, req_state_q;
+    reg dm_valid_d;
+
+    // response FSM
+    always @ (*) begin
+        req_state_d = req_state_q;
+        dm_valid_d = 1'b0;
+
+        case (req_state_q)
+            S_REQ: begin
+                if (dmi_valid_i & dm_ready_o) begin
+                    req_state_d = S_RESP;
+                end
+            end
+
+            S_RESP: begin
+                if (dmi_ready_i) begin
+                    dm_valid_d = 1'b1;
+                    req_state_d = S_REQ;
+                end
+            end
+
+            default:;
+        endcase
+    end
+
+    always @ (posedge clk or negedge rst_n) begin
+        if (!rst_n) begin
+            req_state_q <= S_REQ;
+        end else begin
+            req_state_q <= req_state_d;
+        end
+    end
+
+    // we always ready to receive dmi request
+    assign dm_ready_o = ~sbbusy;
+    assign dm_valid_o = dm_valid_d;
+    assign dm_data_o  = {{DMI_ADDR_BITS{1'b0}}, dm_resp_data_q, 2'b00};  // response successfully
+
+
+    // DMI read or write operation
+    always @ (*) begin
+        // dmstatus
+        dmstatus = 32'h0;
+        dmstatus[`Version]        = `DbgVersion013;
+        dmstatus[`Authenticated]  = 1'b1;
+        dmstatus[`Allresumeack]   = resumeack;
+        dmstatus[`Anyresumeack]   = resumeack;
+        dmstatus[`Allhavereset]   = havereset_q;
+        dmstatus[`Anyhavereset]   = havereset_q;
+        dmstatus[`Allhalted]      = halted;
+        dmstatus[`Anyhalted]      = halted;
+        dmstatus[`Allrunning]     = ~halted;
+        dmstatus[`Anyrunning]     = ~halted;
+        dmstatus[`Allnonexistent] = hartsel > 20'h0;
+        dmstatus[`Anynonexistent] = hartsel > 20'h0;
+
+        // abstractcs
+        cmderr_d = cmderr_q;
+        abstractcs = 32'h0;
+        abstractcs[`Datacount]   = `DataCount;
+        abstractcs[`Progbufsize] = `ProgBufSize;
+        abstractcs[`Busy]        = cmdbusy;
+        abstractcs[`Cmderr]      = cmderr_q;
+        a_abstractcs = 32'h0;
+        abstractauto_d = abstractauto_q;
+
+        havereset_d = havereset_q;
+        sbaddress0_d = sba_sbaddress;
+        dmcontrol_d = dmcontrol_q;
+        clear_resumeack = 1'b0;
+        sbaddress_write_valid = 1'b0;
+        sbdata_write_valid = 1'b0;
+        sbdata_read_valid = 1'b0;
+        sbcs = 32'h0;
+        command_d = command_q;
+        cmd_valid_d = 1'b0;
+
+        progbuf_index = 4'h0;
+        progbuf_d = progbuf_q;
+        abstractautoprogbuf = abstractauto_q[`AutoexecProgbuf];
+
+        data0_d = data0_q;
+        sbcs_d = sbcs_q;
+        sbdata0_d = sbdata0_q;
+        dm_resp_data_d = dm_resp_data_q;
+
+        if (dmi_valid_i & dm_ready_o) begin
+            // read
+            if (dm_op == `DMI_OP_READ) begin
+                case (dm_op_addr)
+                    `DMStatus  :dm_resp_data_d = dmstatus;
+                    `DMControl :dm_resp_data_d = dmcontrol_q;
+                    `Hartinfo  :dm_resp_data_d = HARTINFO;
+                    `SBCS      :dm_resp_data_d = sbcs_q;
+                    `AbstractCS:dm_resp_data_d = abstractcs;
+                    `AbstractAuto: dm_resp_data_d = abstractauto_q;
+                    `Command   :dm_resp_data_d = 32'h0;
+                    `SBAddress0:dm_resp_data_d = sbaddress0_q;
+                    `SBData0   : begin
+                        if (sbbusy || sbcs_q[`Sbbusyerror]) begin
+                            sbcs_d[`Sbbusyerror] = 1'b1;
+                        end else begin
+                            sbdata_read_valid = (sbcs_q[`Sberror] == 3'b0);
+                            dm_resp_data_d = sbdata0_q;
+                        end
+                    end
+                    `Data0: begin
+                        dm_resp_data_d = data0_q;
+                        if (!cmdbusy) begin
+                            cmd_valid_d = abstractauto_q[0];
+                        end else if (cmderr_q == CmdErrorNone) begin
+                            cmderr_d = CmdErrorBusy;
+                        end
+                    end
+                    `ProgBuf0, `ProgBuf1, `ProgBuf2, `ProgBuf3,
+                    `ProgBuf4, `ProgBuf5, `ProgBuf6, `ProgBuf7,
+                    `ProgBuf8, `ProgBuf9: begin
+                        progbuf_index = dm_op_addr[3:0];
+                        dm_resp_data_d = progbuf_q[progbuf_index];
+                        if (!cmdbusy) begin
+                            cmd_valid_d = abstractautoprogbuf[progbuf_index];
+                        end else if (cmderr_q == CmdErrorNone) begin
+                            cmderr_d = CmdErrorBusy;
+                        end
+                    end
+                    `HaltSum0: dm_resp_data_d = {31'h0, halted};
+                    `HaltSum1: dm_resp_data_d = {31'h0, halted};
+                    default: dm_resp_data_d = 32'h0;
+                endcase
+            // write
+            end else if (dm_op == `DMI_OP_WRITE) begin
+                case (dm_op_addr)
+                    `DMControl: begin
+                        dmcontrol_d = dm_op_data;
+                        if (dmcontrol_d[`Ackhavereset]) begin
+                            havereset_d = 1'b0;
+                        end
+                    end
+
+                    `Data0: begin
+                        if (!cmdbusy) begin
+                            data0_d = dm_op_data;
+                            cmd_valid_d = abstractauto_q[0];
+                        end else if (cmderr_q == CmdErrorNone) begin
+                            cmderr_d = CmdErrorBusy;
+                        end
+                    end
+
+                    `SBCS: begin
+                        if (sbbusy) begin
+                            sbcs_d[`Sbbusyerror] = 1'b1;
+                        end else begin
+                            sbcs = dm_op_data;
+                            sbcs_d = dm_op_data;
+                            // write 1 to clear
+                            sbcs_d[`Sbbusyerror] = sbcs_q[`Sbbusyerror] & (~sbcs[`Sbbusyerror]);
+                            sbcs_d[`Sberror]     = sbcs_q[`Sberror]     & (~sbcs[`Sberror]);
+                        end
+                    end
+
+                    `SBAddress0: begin
+                        if (sbbusy | sbcs_q[`Sbbusyerror]) begin
+                            sbcs_d[`Sbbusyerror] = 1'b1;
+                        end else begin
+                            sbaddress0_d = dm_op_data;
+                            sbaddress_write_valid = (sbcs_q[`Sberror] == 3'b0);
+                        end
+                    end
+
+                    `SBData0: begin
+                        if (sbbusy | sbcs_q[`Sbbusyerror]) begin
+                            sbcs_d[`Sbbusyerror] = 1'b1;
+                        end else begin
+                            sbdata0_d = dm_op_data;
+                            sbdata_write_valid = (sbcs_q[`Sberror] == 3'b0);
+                        end
+                    end
+
+                    `Command: begin
+                        if (!cmdbusy) begin
+                            cmd_valid_d = 1'b1;
+                            command_d = dm_op_data;
+                        end else if (cmderr_q == CmdErrorNone) begin
+                            cmderr_d = CmdErrorBusy;
+                        end
+                    end
+
+                    `AbstractCS: begin
+                        a_abstractcs = dm_op_data;
+                        if (!cmdbusy) begin
+                            cmderr_d = (~a_abstractcs[`Cmderr]) & cmderr_q;
+                        end else if (cmderr_q == CmdErrorNone) begin
+                            cmderr_d = CmdErrorBusy;
+                        end
+                    end
+
+                    `AbstractAuto: begin
+                        if (!cmdbusy) begin
+                            abstractauto_d                   = 32'h0;
+                            abstractauto_d[`AutoexecData]    = {11'h0, dm_op_data[0]};
+                            abstractauto_d[`AutoexecProgbuf] = dm_op_data[`ProgBufSize-1+16:16];
+                        end else if (cmderr_q == CmdErrorNone) begin
+                            cmderr_d = CmdErrorBusy;
+                        end
+                    end
+
+                    `ProgBuf0, `ProgBuf1, `ProgBuf2, `ProgBuf3,
+                    `ProgBuf4, `ProgBuf5, `ProgBuf6, `ProgBuf7,
+                    `ProgBuf8, `ProgBuf9: begin
+                        if (!cmdbusy) begin
+                            progbuf_index = dm_op_addr[3:0];
+                            progbuf_d[progbuf_index] = dm_op_data;
+                            cmd_valid_d = abstractautoprogbuf[progbuf_index];
+                        end else if (cmderr_q == CmdErrorNone) begin
+                            cmderr_d = CmdErrorBusy;
+                        end
+                    end
+
+                    default:;
+                endcase
+            // nop
+            end
+        end
+
+        // dmcontrol
+        dmcontrol_d[`Hasel]           = 1'b0;
+        dmcontrol_d[`Hartreset]       = 1'b0;
+        dmcontrol_d[`Setresethaltreq] = 1'b0;
+        dmcontrol_d[`Clrresethaltreq] = 1'b0;
+        dmcontrol_d[`Ackhavereset]    = 1'b0;
+        // 收到resume请求后清resume应答
+        if (!dmcontrol_q[`Resumereq] && dmcontrol_d[`Resumereq]) begin
+            clear_resumeack = 1'b1;
+        end
+        // 发出resume后并且收到应答
+        if (dmcontrol_q[`Resumereq] && resumeack) begin
+            // 清resume请求位
+            dmcontrol_d[`Resumereq] = 1'b0;
+        end
+
+        // sbcs
+        sbcs_d[`Sbversion]            = 3'd1;
+        sbcs_d[`Sbbusy]               = sbbusy;
+        sbcs_d[`Sberror]              = sberror;
+        sbcs_d[`Sbasize]              = 7'd32;
+        sbcs_d[`Sbaccess128]          = 1'b0;
+        sbcs_d[`Sbaccess64]           = 1'b0;
+        sbcs_d[`Sbaccess32]           = 1'b1;
+        sbcs_d[`Sbaccess16]           = 1'b0;
+        sbcs_d[`Sbaccess8]            = 1'b0;
+        sbcs_d[`Sbaccess]             = 3'd2;
+
+        if (sbdata_valid) begin
+            sbdata0_d = sbdata;
+        end
+
+        if (cmderror_valid) begin
+            cmderr_d = cmderror;
+        end
+
+        if (data_valid) begin
+            data0_d = data0;
+        end
+
+        // set the havereset flag when we did a ndmreset
+        if (ndmreset_o) begin
+            havereset_d = 1'b1;
+        end
+    end
+
+    assign debug_req_o = dmcontrol_q[`Haltreq];
+    assign ndmreset_o  = dmcontrol_q[`Ndmreset];
+    assign resumereq   = dmcontrol_q[`Resumereq];
+    assign halted_o    = halted;
+
+    genvar i;
+
+    generate
+        for (i = 0; i < `ProgBufSize; i = i + 1) begin: gen_progbuf
+            always @ (posedge clk or negedge rst_n) begin
+                if (!rst_n) begin
+                    progbuf_q[i] <= 32'h0;
+                end else begin
+                    if (!dmcontrol_q[`Dmactive]) begin
+                        progbuf_q[i] <= 32'h0;
+                    end else begin
+                        progbuf_q[i] <= progbuf_d[i];
+                    end
+                end
+            end
+        end
+    endgenerate
+
+    always @ (posedge clk or negedge rst_n) begin
+        if (!rst_n) begin
+            dmcontrol_q <= 32'h0;
+            havereset_q <= 1'b1;
+            data0_q <= 32'h0;
+            sbcs_q <= 32'h0;
+            sbaddress0_q <= 32'h0;
+            sbdata0_q <= 32'h0;
+            dm_resp_data_q <= 32'h0;
+            cmderr_q <= 3'h0;
+            command_q <= 32'h0;
+            abstractauto_q <= 32'h0;
+            cmd_valid_q <= 1'b0;
+        end else begin
+            if (!dmcontrol_q[`Dmactive]) begin
+                dmcontrol_q[`Haltreq] <= 1'b0;
+                dmcontrol_q[`Resumereq] <= 1'b0;
+                dmcontrol_q[`Hartreset] <= 1'b0;
+                dmcontrol_q[`Ackhavereset] <= 1'b0;
+                dmcontrol_q[`Hasel] <= 1'b0;
+                dmcontrol_q[`Hartsello] <= 10'b0;
+                dmcontrol_q[`Hartselhi] <= 10'b0;
+                dmcontrol_q[`Setresethaltreq] <= 1'b0;
+                dmcontrol_q[`Clrresethaltreq] <= 1'b0;
+                dmcontrol_q[`Ndmreset] <= 1'b0;
+                dmcontrol_q[`Dmactive] <= dmcontrol_d[`Dmactive];
+                data0_q <= 32'h0;
+                sbcs_q <= 32'h0;
+                sbaddress0_q <= 32'h0;
+                sbdata0_q <= 32'h0;
+                dm_resp_data_q <= 32'h0;
+                cmderr_q <= 3'h0;
+                command_q <= 32'h0;
+                abstractauto_q <= 32'h0;
+                cmd_valid_q <= 1'b0;
+            end else begin
+                dmcontrol_q <= dmcontrol_d;
+                data0_q <= data0_d;
+                sbcs_q <= sbcs_d;
+                sbaddress0_q <= sbaddress0_d;
+                sbdata0_q <= sbdata0_d;
+                dm_resp_data_q <= dm_resp_data_d;
+                cmderr_q <= cmderr_d;
+                command_q <= command_d;
+                abstractauto_q <= abstractauto_d;
+                cmd_valid_q <= cmd_valid_d;
+            end
+            havereset_q <= havereset_d;
+        end
+    end
+
+    jtag_mem u_jtag_mem (
+        .clk(clk),
+        .rst_n(rst_n),
+
+        .halted_o(halted),
+        .resumeack_o(resumeack),
+        .clear_resumeack_i(clear_resumeack),
+        .resumereq_i(resumereq),
+        .haltreq_i(debug_req_o),
+        .ndmreset_i(ndmreset_o),
+
+        .progbuf_i(progbuf_q),
+        .data_i(data0_q),
+        .data_o(data0),
+        .data_valid_o(data_valid),
+        .cmd_valid_i(cmd_valid_q),
+        .cmd_i(command_q),
+        .cmderror_valid_o(cmderror_valid),
+        .cmderror_o(cmderror),
+        .cmdbusy_o(cmdbusy),
+
+        .req_i(slave_req_i),
+        .we_i(slave_we_i),
+        .addr_i(slave_addr_i),
+        .be_i(slave_be_i),
+        .wdata_i(slave_wdata_i),
+        .gnt_o(slave_gnt_o),
+        .rvalid_o(slave_rvalid_o),
+        .rdata_o(slave_rdata_o)
+    );
+
+    jtag_sba u_jtag_sba (
+        .clk(clk),
+        .rst_n(rst_n),
+        .sbaddress_i(sbaddress0_q),
+        .sbaddress_write_valid_i(sbaddress_write_valid),
+        .sbreadonaddr_i(sbcs_q[`Sbreadonaddr]),
+        .sbaddress_o(sba_sbaddress),
+        .sbautoincrement_i(sbcs_q[`Sbautoincrement]),
+        .sbaccess_i(sbcs_q[`Sbaccess]),
+        .sbreadondata_i(sbcs_q[`Sbreadondata]),
+        .sbdata_i(sbdata0_q),
+        .sbdata_read_valid_i(sbdata_read_valid),
+        .sbdata_write_valid_i(sbdata_write_valid),
+        .sbdata_o(sbdata),
+        .sbdata_valid_o(sbdata_valid),
+        .sbbusy_o(sbbusy),
+        .sberror_o(sberror),
+
+        .master_req_o(master_req_o),
+        .master_gnt_i(master_gnt_i),
+        .master_rvalid_i(master_rvalid_i),
+        .master_we_o(master_we_o),
+        .master_be_o(master_be_o),
+        .master_addr_o(master_addr_o),
+        .master_wdata_o(master_wdata_o),
+        .master_rdata_i(master_rdata_i),
+        .master_err_i(master_err_i)
+    );
+
+endmodule

rtl/debug/jtag_dm.v

@@ -1,342 +0,0 @@
- /*                                                                      
- Copyright 2020 Blue Liang, liangkangnan@163.com
-                                                                         
- Licensed under the Apache License, Version 2.0 (the "License");         
- you may not use this file except in compliance with the License.        
- You may obtain a copy of the License at                                 
-                                                                         
-     http://www.apache.org/licenses/LICENSE-2.0                          
-                                                                         
- Unless required by applicable law or agreed to in writing, software    
- distributed under the License is distributed on an "AS IS" BASIS,       
- WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- See the License for the specific language governing permissions and     
- limitations under the License.                                          
- */
-
-`define DM_RESP_VALID     1'b1
-`define DM_RESP_INVALID   1'b0
-`define DTM_REQ_VALID     1'b1
-`define DTM_REQ_INVALID   1'b0
-
-`define DTM_OP_NOP        2'b00
-`define DTM_OP_READ       2'b01
-`define DTM_OP_WRITE      2'b10
-
-
-module jtag_dm #(
-    parameter DMI_ADDR_BITS = 6,
-    parameter DMI_DATA_BITS = 32,
-    parameter DMI_OP_BITS = 2)(
-
-    clk,
-    rst_n,
-
-    // rx
-    dm_ack_o,
-    dtm_req_valid_i,
-    dtm_req_data_i,
-
-    // tx
-    dtm_ack_i,
-    dm_resp_data_o,
-    dm_resp_valid_o,
-
-    dm_reg_we_o,
-    dm_reg_addr_o,
-    dm_reg_wdata_o,
-    dm_reg_rdata_i,
-    dm_mem_we_o,
-    dm_mem_addr_o,
-    dm_mem_wdata_o,
-    dm_mem_rdata_i,
-
-    dm_op_req_o,
-    dm_halt_req_o,
-    dm_reset_req_o
-
-    );
-
-    parameter DM_RESP_BITS = DMI_ADDR_BITS + DMI_DATA_BITS + DMI_OP_BITS;
-    parameter DTM_REQ_BITS = DMI_ADDR_BITS + DMI_DATA_BITS + DMI_OP_BITS;
-    parameter SHIFT_REG_BITS = DTM_REQ_BITS;
-
-    // 输入输出信号
-    input wire clk;
-    input wire rst_n;
-    output wire dm_ack_o;
-    input wire dtm_req_valid_i;
-    input wire[DTM_REQ_BITS-1:0] dtm_req_data_i;
-    input wire dtm_ack_i;
-    output wire[DM_RESP_BITS-1:0] dm_resp_data_o;
-    output wire dm_resp_valid_o;
-    output wire dm_reg_we_o;
-    output wire[4:0] dm_reg_addr_o;
-    output wire[31:0] dm_reg_wdata_o;
-    input wire[31:0] dm_reg_rdata_i;
-    output wire dm_mem_we_o;
-    output wire[31:0] dm_mem_addr_o;
-    output wire[31:0] dm_mem_wdata_o;
-    input wire[31:0] dm_mem_rdata_i;
-    output wire dm_op_req_o;
-    output wire dm_halt_req_o;
-    output wire dm_reset_req_o;
-
-    // DM模块寄存器
-    reg[31:0] dcsr;
-    reg[31:0] dmstatus;
-    reg[31:0] dmcontrol;
-    reg[31:0] hartinfo;
-    reg[31:0] abstractcs;
-    reg[31:0] data0;
-    reg[31:0] sbcs;
-    reg[31:0] sbaddress0;
-    reg[31:0] sbdata0;
-    reg[31:0] command;
-
-    // DM模块寄存器地址
-    localparam DCSR       = 16'h7b0;
-    localparam DMSTATUS   = 6'h11;
-    localparam DMCONTROL  = 6'h10;
-    localparam HARTINFO   = 6'h12;
-    localparam ABSTRACTCS = 6'h16;
-    localparam DATA0      = 6'h04;
-    localparam SBCS       = 6'h38;
-    localparam SBADDRESS0 = 6'h39;
-    localparam SBDATA0    = 6'h3C;
-    localparam COMMAND    = 6'h17;
-    localparam DPC        = 16'h7b1;
-
-    localparam OP_SUCC = 2'b00;
-
-    reg[31:0] read_data;
-    reg dm_reg_we;
-    reg[4:0] dm_reg_addr;
-    reg[31:0] dm_reg_wdata;
-    reg dm_mem_we;
-    reg[31:0] dm_mem_addr;
-    reg[31:0] dm_mem_wdata;
-    reg dm_halt_req;
-    reg dm_reset_req;
-    reg need_resp;
-    reg is_read_reg;
-    wire rx_valid;
-    wire[DTM_REQ_BITS-1:0] rx_data;
-
-    wire[31:0] sbaddress0_next = sbaddress0 + 4;
-    wire[DM_RESP_BITS-1:0] dm_resp_data;
-
-    wire[DMI_OP_BITS-1:0] op = rx_data[DMI_OP_BITS-1:0];
-    wire[DMI_DATA_BITS-1:0] data = rx_data[DMI_DATA_BITS+DMI_OP_BITS-1:DMI_OP_BITS];
-    wire[DMI_ADDR_BITS-1:0] address = rx_data[DTM_REQ_BITS-1:DMI_DATA_BITS+DMI_OP_BITS];
-
-    wire read_dmstatus = (op == `DTM_OP_READ) & (address == DMSTATUS);
-
-    always @ (posedge clk or negedge rst_n) begin
-        if (!rst_n) begin
-            dm_mem_we <= 1'b0;
-            dm_reg_we <= 1'b0;
-            dm_halt_req <= 1'b0;
-            dm_reset_req <= 1'b0;
-            dm_mem_addr <= 32'h0;
-            dm_reg_addr <= 5'h0;
-            sbaddress0 <= 32'h0;
-            dcsr <= 32'h0;
-            hartinfo <= 32'h0;
-            sbcs <= 32'h20040404;
-            dmcontrol <= 32'h0;
-            abstractcs <= 32'h1000003;
-            data0 <= 32'h0;
-            sbdata0 <= 32'h0;
-            command <= 32'h0;
-            dm_reg_wdata <= 32'h0;
-            dm_mem_wdata <= 32'h0;
-            dmstatus <= 32'h430c82;
-            is_read_reg <= 1'b0;
-            read_data <= 32'h0;
-            need_resp <= 1'b0;
-        end else begin
-            if (rx_valid) begin
-                need_resp <= 1'b1;
-                case (op)
-                    `DTM_OP_READ: begin
-                        case (address)
-                            DMSTATUS: begin
-                                read_data <= dmstatus;
-                            end
-                            DMCONTROL: begin
-                                read_data <= dmcontrol;
-                            end
-                            HARTINFO: begin
-                                read_data <= hartinfo;
-                            end
-                            SBCS: begin
-                                read_data <= sbcs;
-                            end
-                            ABSTRACTCS: begin
-                                read_data <= abstractcs;
-                            end
-                            DATA0: begin
-                                if (is_read_reg == 1'b1) begin
-                                    read_data <= dm_reg_rdata_i;
-                                end else begin
-                                    read_data <= data0;
-                                end
-                                is_read_reg <= 1'b0;
-                            end
-                            SBDATA0: begin
-                                read_data <= dm_mem_rdata_i;
-                                if (sbcs[16] == 1'b1) begin
-                                    sbaddress0 <= sbaddress0_next;
-                                end
-                                if (sbcs[15] == 1'b1) begin
-                                    dm_mem_addr <= sbaddress0_next;
-                                end
-                            end
-                            default: begin
-                                read_data <= {(DMI_DATA_BITS){1'b0}};
-                            end
-                        endcase
-                    end
-
-                    `DTM_OP_WRITE: begin
-                        read_data <= {(DMI_DATA_BITS){1'b0}};
-                        case (address)
-                            DMCONTROL: begin
-                                // reset DM module
-                                if (data[0] == 1'b0) begin
-                                    dcsr <= 32'hc0;
-                                    dmstatus <= 32'h430c82;  // not halted, all running
-                                    hartinfo <= 32'h0;
-                                    sbcs <= 32'h20040404;
-                                    abstractcs <= 32'h1000003;
-                                    dmcontrol <= data;
-                                    dm_halt_req <= 1'b0;
-                                    dm_reset_req <= 1'b0;
-                                // DM is active
-                                end else begin
-                                    // we have only one hart
-                                    dmcontrol <= (data & ~(32'h3fffc0)) | 32'h10000;
-                                    // halt
-                                    if (data[31] == 1'b1) begin
-                                        dm_halt_req <= 1'b1;
-                                        // clear ALLRUNNING ANYRUNNING and set ALLHALTED
-                                        dmstatus <= {dmstatus[31:12], 4'h3, dmstatus[7:0]};
-                                    // resume
-                                    end else if (dm_halt_req == 1'b1 && data[30] == 1'b1) begin
-                                        dm_halt_req <= 1'b0;
-                                        // set ALLRUNNING ANYRUNNING and clear ALLHALTED
-                                        dmstatus <= {dmstatus[31:12], 4'hc, dmstatus[7:0]};
-                                    end
-                                end
-                            end
-                            COMMAND: begin
-                                // access reg
-                                if (data[31:24] == 8'h0) begin
-                                    if (data[22:20] > 3'h2) begin
-                                        abstractcs <= abstractcs | (1'b1 << 9);
-                                    end else begin
-                                        abstractcs <= abstractcs & (~(3'h7 << 8));
-                                        // read or write
-                                        if (data[18] == 1'b0) begin
-                                            dm_reg_addr <= data[15:0] - 16'h1000;
-                                            // read
-                                            if (data[16] == 1'b0) begin
-                                                if (data[15:0] == DCSR) begin
-                                                    data0 <= dcsr;
-                                                end else if (data[15:0] < 16'h1020) begin
-                                                    is_read_reg <= 1'b1;
-                                                end
-                                            // write
-                                            end else begin
-                                                // when write dpc, we reset cpu here
-                                                if (data[15:0] == DPC) begin
-                                                    dm_reset_req <= 1'b1;
-                                                    dm_halt_req <= 1'b0;
-                                                    dmstatus <= {dmstatus[31:12], 4'hc, dmstatus[7:0]};
-                                                end else if (data[15:0] < 16'h1020) begin
-                                                    dm_reg_we <= 1'b1;
-                                                    dm_reg_wdata <= data0;
-                                                end
-                                            end
-                                        end
-                                    end
-                                end
-                            end
-                            DATA0: begin
-                                data0 <= data;
-                            end
-                            SBCS: begin
-                                sbcs <= data;
-                            end
-                            SBADDRESS0: begin
-                                sbaddress0 <= data;
-                                if (sbcs[20] == 1'b1) begin
-                                    dm_mem_addr <= data;
-                                end
-                            end
-                            SBDATA0: begin
-                                sbdata0 <= data;
-                                dm_mem_addr <= sbaddress0;
-                                dm_mem_wdata <= data;
-                                dm_mem_we <= 1'b1;
-                                if (sbcs[16] == 1'b1) begin
-                                    sbaddress0 <= sbaddress0_next;
-                                end
-                            end
-                        endcase
-                    end
-
-                    `DTM_OP_NOP: begin
-                        read_data <= {(DMI_DATA_BITS){1'b0}};
-                    end
-                endcase
-            end else begin
-                need_resp <= 1'b0;
-                dm_mem_we <= 1'b0;
-                dm_reg_we <= 1'b0;
-                dm_reset_req <= 1'b0;
-            end
-        end
-    end
-
-    assign dm_reg_we_o = dm_reg_we;
-    assign dm_reg_addr_o = dm_reg_addr;
-    assign dm_reg_wdata_o = dm_reg_wdata;
-    assign dm_mem_we_o = dm_mem_we;
-    assign dm_mem_addr_o = dm_mem_addr;
-    assign dm_mem_wdata_o = dm_mem_wdata;
-
-    assign dm_op_req_o = (rx_valid & (~read_dmstatus)) | need_resp;
-    assign dm_halt_req_o = dm_halt_req;
-    assign dm_reset_req_o = dm_reset_req;
-
-    assign dm_resp_data = {address, read_data, OP_SUCC};
-
-
-    full_handshake_tx #(
-        .DW(DM_RESP_BITS)
-    ) tx(
-        .clk(clk),
-        .rst_n(rst_n),
-        .ack_i(dtm_ack_i),
-        .req_i(need_resp),
-        .req_data_i(dm_resp_data),
-        .idle_o(tx_idle),
-        .req_o(dm_resp_valid_o),
-        .req_data_o(dm_resp_data_o)
-    );
-
-    full_handshake_rx #(
-        .DW(DTM_REQ_BITS)
-    ) rx(
-        .clk(clk),
-        .rst_n(rst_n),
-        .req_i(dtm_req_valid_i),
-        .req_data_i(dtm_req_data_i),
-        .ack_o(dm_ack_o),
-        .recv_data_o(rx_data),
-        .recv_rdy_o(rx_valid)
-    );
-
-endmodule

rtl/debug/jtag_dmi.sv

@@ -0,0 +1,76 @@
+ /*                                                                      
+ Copyright 2021 Blue Liang, liangkangnan@163.com
+                                                                         
+ Licensed under the Apache License, Version 2.0 (the "License");         
+ you may not use this file except in compliance with the License.        
+ You may obtain a copy of the License at                                 
+                                                                         
+     http://www.apache.org/licenses/LICENSE-2.0                          
+                                                                         
+ Unless required by applicable law or agreed to in writing, software    
+ distributed under the License is distributed on an "AS IS" BASIS,       
+ WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ See the License for the specific language governing permissions and     
+ limitations under the License.                                          
+ */
+
+
+module jtag_dmi #(
+    parameter DATA_WIDTH = 41
+    )(
+
+    // JTAG side(master side)
+    input  wire                     jtag_tck_i,
+    input  wire                     jtag_trst_ni,
+
+    input  wire [DATA_WIDTH-1:0]    jtag_data_i,
+    input  wire                     jtag_valid_i,
+    output wire                     jtag_ready_o,
+
+    output wire [DATA_WIDTH-1:0]    jtag_data_o,
+    output wire                     jtag_valid_o,
+    input  wire                     jtag_ready_i,
+
+    // Core side(slave side)
+    input  wire                     clk_i,
+    input  wire                     rst_ni,
+
+    input  wire [DATA_WIDTH-1:0]    core_data_i,
+    input  wire                     core_valid_i,
+    output wire                     core_ready_o,
+
+    output wire [DATA_WIDTH-1:0]    core_data_o,
+    output wire                     core_valid_o,
+    input  wire                     core_ready_i
+
+    );
+
+    cdc_2phase #(.DATA_WIDTH(DATA_WIDTH)) u_cdc_req (
+        .src_rst_ni  ( jtag_trst_ni     ),
+        .src_clk_i   ( jtag_tck_i       ),
+        .src_data_i  ( jtag_data_i      ),
+        .src_valid_i ( jtag_valid_i     ),
+        .src_ready_o ( jtag_ready_o     ),
+
+        .dst_rst_ni  ( rst_ni           ),
+        .dst_clk_i   ( clk_i            ),
+        .dst_data_o  ( core_data_o      ),
+        .dst_valid_o ( core_valid_o     ),
+        .dst_ready_i ( core_ready_i     )
+    );
+
+    cdc_2phase #(.DATA_WIDTH(DATA_WIDTH)) u_cdc_resp (
+        .src_rst_ni  ( rst_ni           ),
+        .src_clk_i   ( clk_i            ),
+        .src_data_i  ( core_data_i      ),
+        .src_valid_i ( core_valid_i     ),
+        .src_ready_o ( core_ready_o     ),
+
+        .dst_rst_ni  ( jtag_trst_ni     ),
+        .dst_clk_i   ( jtag_tck_i       ),
+        .dst_data_o  ( jtag_data_o      ),
+        .dst_valid_o ( jtag_valid_o     ),
+        .dst_ready_i ( jtag_ready_i     )
+    );
+
+endmodule

rtl/debug/jtag_driver.v

@@ -1,295 +0,0 @@
- /*                                                                      
- Copyright 2020 Blue Liang, liangkangnan@163.com
-                                                                         
- Licensed under the Apache License, Version 2.0 (the "License");         
- you may not use this file except in compliance with the License.        
- You may obtain a copy of the License at                                 
-                                                                         
-     http://www.apache.org/licenses/LICENSE-2.0                          
-                                                                         
- Unless required by applicable law or agreed to in writing, software    
- distributed under the License is distributed on an "AS IS" BASIS,       
- WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- See the License for the specific language governing permissions and     
- limitations under the License.                                          
- */
-
-`define DM_RESP_VALID     1'b1
-`define DM_RESP_INVALID   1'b0
-`define DTM_REQ_VALID     1'b1
-`define DTM_REQ_INVALID   1'b0
-
-
-module jtag_driver #(
-    parameter DMI_ADDR_BITS = 6,
-    parameter DMI_DATA_BITS = 32,
-    parameter DMI_OP_BITS = 2)(
-
-    rst_n,
-
-    jtag_TCK,
-    jtag_TDI,
-    jtag_TMS,
-    jtag_TDO,
-
-    // rx
-    dm_resp_i,
-    dm_resp_data_i,
-    dtm_ack_o,
-
-    // tx
-    dm_ack_i,
-    dtm_req_valid_o,
-    dtm_req_data_o
-
-    );
-
-    parameter IDCODE_VERSION  = 4'h1;
-    parameter IDCODE_PART_NUMBER = 16'he200;
-    parameter IDCODE_MANUFLD = 11'h537;
-
-    parameter DTM_VERSION  = 4'h1;
-    parameter IR_BITS = 5;
-
-    parameter DM_RESP_BITS = DMI_ADDR_BITS + DMI_DATA_BITS + DMI_OP_BITS;
-    parameter DTM_REQ_BITS = DMI_ADDR_BITS + DMI_DATA_BITS + DMI_OP_BITS;
-    parameter SHIFT_REG_BITS = DTM_REQ_BITS;
-
-    // input and output
-    input wire rst_n;
-    input wire jtag_TCK;
-    input wire jtag_TDI;
-    input wire jtag_TMS;
-    output reg jtag_TDO;
-    input wire dm_resp_i;
-    input wire[DM_RESP_BITS - 1:0] dm_resp_data_i;
-    output wire dtm_ack_o;
-    input wire dm_ack_i;
-    output wire dtm_req_valid_o;
-    output wire[DTM_REQ_BITS - 1:0] dtm_req_data_o;
-
-    // JTAG StateMachine
-    parameter TEST_LOGIC_RESET  = 4'h0;
-    parameter RUN_TEST_IDLE     = 4'h1;
-    parameter SELECT_DR         = 4'h2;
-    parameter CAPTURE_DR        = 4'h3;
-    parameter SHIFT_DR          = 4'h4;
-    parameter EXIT1_DR          = 4'h5;
-    parameter PAUSE_DR          = 4'h6;
-    parameter EXIT2_DR          = 4'h7;
-    parameter UPDATE_DR         = 4'h8;
-    parameter SELECT_IR         = 4'h9;
-    parameter CAPTURE_IR        = 4'hA;
-    parameter SHIFT_IR          = 4'hB;
-    parameter EXIT1_IR          = 4'hC;
-    parameter PAUSE_IR          = 4'hD;
-    parameter EXIT2_IR          = 4'hE;
-    parameter UPDATE_IR         = 4'hF;
-
-    // DTM regs
-    parameter REG_BYPASS       = 5'b11111;
-    parameter REG_IDCODE       = 5'b00001;
-    parameter REG_DMI          = 5'b10001;
-    parameter REG_DTMCS        = 5'b10000;
-
-    reg[IR_BITS - 1:0] ir_reg;
-    reg[SHIFT_REG_BITS - 1:0] shift_reg;
-    reg[3:0] jtag_state;
-    wire is_busy;
-    reg sticky_busy;
-    reg dtm_req_valid;
-    reg[DTM_REQ_BITS - 1:0] dtm_req_data;
-    reg[DM_RESP_BITS - 1:0] dm_resp_data;
-    reg dm_is_busy;
-
-    wire[5:0] addr_bits = DMI_ADDR_BITS[5:0];
-    wire [SHIFT_REG_BITS - 1:0] busy_response;
-    wire [SHIFT_REG_BITS - 1:0] none_busy_response;
-    wire[31:0] idcode;
-    wire[31:0] dtmcs;
-    wire[1:0] dmi_stat;
-    wire dtm_reset;
-    wire tx_idle;
-    wire rx_valid;
-    wire[DM_RESP_BITS - 1:0] rx_data;
-    wire tx_valid;
-    wire[DTM_REQ_BITS - 1:0] tx_data;
-
-    assign dtm_reset = shift_reg[16];
-    assign idcode = {IDCODE_VERSION, IDCODE_PART_NUMBER, IDCODE_MANUFLD, 1'h1};
-    assign dtmcs = {14'b0,
-                    1'b0,  // dmihardreset
-                    1'b0,  // dmireset
-                    1'b0,
-                    3'h5,  // idle
-                    dmi_stat,      // dmistat
-                    addr_bits,    // abits
-                    DTM_VERSION}; // version
-
-    assign busy_response = {{(DMI_ADDR_BITS + DMI_DATA_BITS){1'b0}}, {(DMI_OP_BITS){1'b1}}};  // op = 2'b11
-    assign none_busy_response = dm_resp_data;
-    assign is_busy = sticky_busy | dm_is_busy;
-    assign dmi_stat = is_busy ? 2'b01 : 2'b00;
-
-    // state switch
-    always @(posedge jtag_TCK or negedge rst_n) begin
-        if (!rst_n) begin
-            jtag_state <= TEST_LOGIC_RESET;
-        end else begin
-            case (jtag_state)
-                TEST_LOGIC_RESET  : jtag_state <= jtag_TMS ? TEST_LOGIC_RESET : RUN_TEST_IDLE;
-                RUN_TEST_IDLE     : jtag_state <= jtag_TMS ? SELECT_DR        : RUN_TEST_IDLE;
-                SELECT_DR         : jtag_state <= jtag_TMS ? SELECT_IR        : CAPTURE_DR;
-                CAPTURE_DR        : jtag_state <= jtag_TMS ? EXIT1_DR         : SHIFT_DR;
-                SHIFT_DR          : jtag_state <= jtag_TMS ? EXIT1_DR         : SHIFT_DR;
-                EXIT1_DR          : jtag_state <= jtag_TMS ? UPDATE_DR        : PAUSE_DR;
-                PAUSE_DR          : jtag_state <= jtag_TMS ? EXIT2_DR         : PAUSE_DR;
-                EXIT2_DR          : jtag_state <= jtag_TMS ? UPDATE_DR        : SHIFT_DR;
-                UPDATE_DR         : jtag_state <= jtag_TMS ? SELECT_DR        : RUN_TEST_IDLE;
-                SELECT_IR         : jtag_state <= jtag_TMS ? TEST_LOGIC_RESET : CAPTURE_IR;
-                CAPTURE_IR        : jtag_state <= jtag_TMS ? EXIT1_IR         : SHIFT_IR;
-                SHIFT_IR          : jtag_state <= jtag_TMS ? EXIT1_IR         : SHIFT_IR;
-                EXIT1_IR          : jtag_state <= jtag_TMS ? UPDATE_IR        : PAUSE_IR;
-                PAUSE_IR          : jtag_state <= jtag_TMS ? EXIT2_IR         : PAUSE_IR;
-                EXIT2_IR          : jtag_state <= jtag_TMS ? UPDATE_IR        : SHIFT_IR;
-                UPDATE_IR         : jtag_state <= jtag_TMS ? SELECT_DR        : RUN_TEST_IDLE; 
-            endcase
-        end
-    end
-
-    // IR or DR shift
-    always @(posedge jtag_TCK) begin
-        case (jtag_state)
-            // IR
-            CAPTURE_IR: shift_reg <= {{(SHIFT_REG_BITS - 1){1'b0}}, 1'b1}; //JTAG spec says it must be b01
-            SHIFT_IR  : shift_reg <= {{(SHIFT_REG_BITS - IR_BITS){1'b0}}, jtag_TDI, shift_reg[IR_BITS - 1:1]}; // right shift 1 bit
-            // DR
-            CAPTURE_DR: case (ir_reg) 
-                            REG_BYPASS     : shift_reg <= {(SHIFT_REG_BITS){1'b0}};
-                            REG_IDCODE     : shift_reg <= {{(SHIFT_REG_BITS - DMI_DATA_BITS){1'b0}}, idcode};
-                            REG_DTMCS      : shift_reg <= {{(SHIFT_REG_BITS - DMI_DATA_BITS){1'b0}}, dtmcs};
-                            REG_DMI        : shift_reg <=  is_busy ? busy_response : none_busy_response;
-                            default:
-                                shift_reg <= {(SHIFT_REG_BITS){1'b0}};
-                        endcase
-            SHIFT_DR  : case (ir_reg) 
-                            REG_BYPASS     : shift_reg <= {{(SHIFT_REG_BITS - 1){1'b0}}, jtag_TDI}; // in = out
-                            REG_IDCODE     : shift_reg <= {{(SHIFT_REG_BITS - DMI_DATA_BITS){1'b0}}, jtag_TDI, shift_reg[31:1]}; // right shift 1 bit
-                            REG_DTMCS      : shift_reg <= {{(SHIFT_REG_BITS - DMI_DATA_BITS){1'b0}}, jtag_TDI, shift_reg[31:1]}; // right shift 1 bit
-                            REG_DMI        : shift_reg <= {jtag_TDI, shift_reg[SHIFT_REG_BITS - 1:1]}; // right shift 1 bit
-                            default:
-                                shift_reg <= {{(SHIFT_REG_BITS - 1){1'b0}} , jtag_TDI};
-                        endcase 
-        endcase
-    end
-
-    // start access DM module
-    always @(posedge jtag_TCK or negedge rst_n) begin
-        if (!rst_n) begin
-            dtm_req_valid <= `DTM_REQ_INVALID;
-            dtm_req_data <= {DTM_REQ_BITS{1'b0}};
-        end else begin
-            if (jtag_state == UPDATE_DR) begin
-                if (ir_reg == REG_DMI) begin
-                    // if DM can be access
-                    if (!is_busy & tx_idle) begin
-                        dtm_req_valid <= `DTM_REQ_VALID;
-                        dtm_req_data <= shift_reg;
-                    end
-                end
-            end else begin
-                dtm_req_valid <= `DTM_REQ_INVALID;
-            end
-        end
-    end
-
-    assign tx_valid = dtm_req_valid;
-    assign tx_data = dtm_req_data;
-
-    // DTM reset
-    always @ (posedge jtag_TCK or negedge rst_n) begin
-        if (!rst_n) begin
-            sticky_busy <= 1'b0;
-        end else begin
-            if (jtag_state == UPDATE_DR) begin
-                if (ir_reg == REG_DTMCS & dtm_reset) begin
-                    sticky_busy <= 1'b0;
-                end
-            end else if (jtag_state == CAPTURE_DR) begin
-                if (ir_reg == REG_DMI) begin
-                    sticky_busy <= is_busy;
-                end
-            end
-        end
-    end
-
-    // receive DM response data
-    always @ (posedge jtag_TCK or negedge rst_n) begin
-        if (!rst_n) begin
-            dm_resp_data <= {DM_RESP_BITS{1'b0}};
-        end else begin
-            if (rx_valid) begin
-                dm_resp_data <= rx_data;
-            end
-        end
-    end
-
-    // tx busy
-    always @ (posedge jtag_TCK or negedge rst_n) begin
-        if (!rst_n) begin
-            dm_is_busy <= 1'b0;
-        end else begin
-            if (dtm_req_valid) begin
-                dm_is_busy <= 1'b1;
-            end else if (rx_valid) begin
-                dm_is_busy <= 1'b0;
-            end
-        end
-    end
-
-    // TAP reset
-    always @(negedge jtag_TCK) begin
-        if (jtag_state == TEST_LOGIC_RESET) begin
-            ir_reg <= REG_IDCODE;
-        end else if (jtag_state == UPDATE_IR) begin
-            ir_reg <= shift_reg[IR_BITS - 1:0];
-        end
-    end
-
-    // TDO output
-    always @(negedge jtag_TCK) begin
-        if (jtag_state == SHIFT_IR) begin
-            jtag_TDO <= shift_reg[0];
-        end else if (jtag_state == SHIFT_DR) begin
-            jtag_TDO <= shift_reg[0];
-        end else begin
-            jtag_TDO <= 1'b0;
-        end
-    end
-
-    full_handshake_tx #(
-        .DW(DTM_REQ_BITS)
-    ) tx(
-        .clk(jtag_TCK),
-        .rst_n(rst_n),
-        .ack_i(dm_ack_i),
-        .req_i(tx_valid),
-        .req_data_i(tx_data),
-        .idle_o(tx_idle),
-        .req_o(dtm_req_valid_o),
-        .req_data_o(dtm_req_data_o)
-    );
-
-    full_handshake_rx #(
-        .DW(DM_RESP_BITS)
-    ) rx(
-        .clk(jtag_TCK),
-        .rst_n(rst_n),
-        .req_i(dm_resp_i),
-        .req_data_i(dm_resp_data_i),
-        .ack_o(dtm_ack_o),
-        .recv_data_o(rx_data),
-        .recv_rdy_o(rx_valid)
-    );
-
-endmodule

rtl/debug/jtag_dtm.sv

@@ -0,0 +1,194 @@
+ /*                                                                      
+ Copyright 2021 Blue Liang, liangkangnan@163.com
+                                                                         
+ Licensed under the Apache License, Version 2.0 (the "License");         
+ you may not use this file except in compliance with the License.        
+ You may obtain a copy of the License at                                 
+                                                                         
+     http://www.apache.org/licenses/LICENSE-2.0                          
+                                                                         
+ Unless required by applicable law or agreed to in writing, software    
+ distributed under the License is distributed on an "AS IS" BASIS,       
+ WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ See the License for the specific language governing permissions and     
+ limitations under the License.                                          
+ */
+
+`include "jtag_def.sv"
+
+module jtag_dtm #(
+    parameter DMI_ADDR_BITS  = 7,
+    parameter DMI_DATA_BITS  = 32,
+    parameter DMI_OP_BITS    = 2,
+    parameter TAP_REQ_BITS  = DMI_ADDR_BITS + DMI_DATA_BITS + DMI_OP_BITS,
+    parameter DTM_RESP_BITS = TAP_REQ_BITS,
+    parameter DTM_REQ_BITS  = DTM_RESP_BITS,
+    parameter DMI_RESP_BITS = DTM_REQ_BITS
+    )(
+
+    input  wire                     jtag_tck_i,     // JTAG test clock pad
+    input  wire                     jtag_trst_ni,   // JTAG test reset pad
+
+    // to jtag_dmi
+    output wire [DTM_REQ_BITS-1:0]  dtm_data_o,
+    output wire                     dtm_valid_o,
+    // from jtag_dmi
+    input  wire                     dmi_ready_i,
+
+    // from jtag_dmi
+    input  wire [DMI_RESP_BITS-1:0] dmi_data_i,
+    input  wire                     dmi_valid_i,
+    // to jtag_dmi
+    output wire                     dtm_ready_o,
+
+    // from jtag_tap
+    input  wire                     tap_req_i,
+    input  wire [TAP_REQ_BITS-1:0]  tap_data_i,
+    input  wire                     dmireset_i,
+
+    // to jtag_tap
+    output wire [DTM_RESP_BITS-1:0] data_o,
+    output wire [31:0]              idcode_o,
+    output wire [31:0]              dtmcs_o
+
+    );
+
+    localparam IDCODE_VERSION       = 4'h1;
+    localparam IDCODE_PART_NUMBER   = 16'he200;
+    localparam IDCODE_MANUFLD       = 11'h537;
+
+    localparam DTM_VERSION          = 4'h1;
+
+    localparam S_IDLE               = 5'b00001;
+    localparam S_READ               = 5'b00010;
+    localparam S_WAIT_READ          = 5'b00100;
+    localparam S_WRITE              = 5'b01000;
+    localparam S_WAIT_WRITE         = 5'b10000;
+
+    reg[4:0] state_d;
+    reg[4:0] state_q;
+    reg dtm_valid;
+    reg dtm_ready;
+    reg[DTM_REQ_BITS-1:0] dtm_data_q;
+    reg[DTM_REQ_BITS-1:0] dtm_data_d;
+    reg[DTM_RESP_BITS-1:0] resp_tap_data_q;
+    reg is_busy;
+    reg stick_busy;
+
+    wire[DTM_RESP_BITS-1:0] busy_response;
+    wire dtm_busy;
+    wire[DMI_OP_BITS-1:0] op;
+    wire[1:0] dmistat;
+    wire[DMI_ADDR_BITS-1:0] abits = DMI_ADDR_BITS[6:0];
+
+    assign idcode_o = {IDCODE_VERSION, IDCODE_PART_NUMBER, IDCODE_MANUFLD, 1'h1};
+    assign dtmcs_o = {14'b0,
+                      1'b0,         // dmihardreset
+                      1'b0,         // dmireset
+                      1'b0,
+                      3'h1,         // idle
+                      dmistat,      // dmistat
+                      abits,        // abits
+                      DTM_VERSION}; // version
+
+    assign busy_response = {{(DMI_ADDR_BITS + DMI_DATA_BITS){1'b0}}, {(DMI_OP_BITS){1'b1}}};  // op = 2'b11
+
+    assign dmistat = (stick_busy | is_busy) ? 2'b11 : 2'b00;
+
+    assign op = tap_data_i[DMI_OP_BITS-1:0];
+
+    always @ (*) begin
+        state_d = state_q;
+        dtm_valid = 1'b0;
+        dtm_ready = 1'b0;
+        dtm_data_d = dtm_data_q;
+
+        case (state_q)
+            S_IDLE: begin
+                if (tap_req_i) begin
+                    if (op == `DMI_OP_READ) begin
+                        state_d = S_READ;
+                        dtm_data_d = tap_data_i;
+                    end else if (op == `DMI_OP_WRITE) begin
+                        state_d = S_WRITE;
+                        dtm_data_d = tap_data_i;
+                    end else begin
+                        state_d = S_IDLE;
+                    end
+                end else begin
+                    state_d = S_IDLE;
+                end
+            end
+
+            S_READ: begin
+                if (dmi_ready_i) begin
+                    dtm_valid = 1'b1;
+                    state_d = S_WAIT_READ;
+                end
+            end
+
+            S_WAIT_READ: begin
+                dtm_ready = 1'b1;
+                if (dmi_valid_i) begin
+                    dtm_data_d = dmi_data_i;
+                    state_d = S_IDLE;
+                end
+            end
+
+            S_WRITE: begin
+                if (dmi_ready_i) begin
+                    dtm_valid = 1'b1;
+                    state_d = S_WAIT_WRITE;
+                end
+            end
+
+            S_WAIT_WRITE: begin
+                dtm_ready = 1'b1;
+                if (dmi_valid_i) begin
+                    dtm_data_d = dmi_data_i;
+                    state_d = S_IDLE;
+                end
+            end
+
+            default: begin
+                dtm_data_d = {DTM_REQ_BITS{1'b0}};
+                state_d = S_IDLE;
+            end
+        endcase
+    end
+
+    assign dtm_valid_o = dtm_valid;
+    assign dtm_data_o  = dtm_data_q;
+    assign dtm_ready_o = dtm_ready;
+
+    always @ (posedge jtag_tck_i or negedge jtag_trst_ni) begin
+        if (!jtag_trst_ni) begin
+            state_q <= S_IDLE;
+            dtm_data_q <= {DTM_REQ_BITS{1'b0}};
+        end else begin
+            state_q <= state_d;
+            dtm_data_q <= dtm_data_d;
+        end
+    end
+
+    always @ (posedge jtag_tck_i or negedge jtag_trst_ni) begin
+        if (!jtag_trst_ni) begin
+            is_busy <= 1'b0;
+            stick_busy <= 1'b0;
+        end else begin
+            if (dmireset_i) begin
+                stick_busy <= 1'b0;
+            end else if ((state_q != S_IDLE) && tap_req_i) begin
+                stick_busy <= 1'b1;
+            end
+            if ((state_q != S_IDLE) | tap_req_i) begin
+                is_busy <= 1'b1;
+            end else begin
+                is_busy <= 1'b0;
+            end
+        end
+    end
+
+    assign data_o = (stick_busy | is_busy | tap_req_i) ? busy_response : dtm_data_q;
+
+endmodule

rtl/debug/jtag_mem.sv

@@ -0,0 +1,512 @@
+ /*                                                                      
+ Copyright 2021 Blue Liang, liangkangnan@163.com
+                                                                         
+ Licensed under the Apache License, Version 2.0 (the "License");         
+ you may not use this file except in compliance with the License.        
+ You may obtain a copy of the License at                                 
+                                                                         
+     http://www.apache.org/licenses/LICENSE-2.0                          
+                                                                         
+ Unless required by applicable law or agreed to in writing, software    
+ distributed under the License is distributed on an "AS IS" BASIS,       
+ WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ See the License for the specific language governing permissions and     
+ limitations under the License.                                          
+ */
+
+`include "jtag_def.sv"
+
+module jtag_mem(
+
+    input wire                           clk,
+    input wire                           rst_n,
+
+    output wire                          halted_o,
+    output wire                          resumeack_o,
+    input  wire                          clear_resumeack_i,
+    input  wire                          resumereq_i,
+    input  wire                          haltreq_i,
+    input  wire                          ndmreset_i,
+
+    input  wire [`ProgBufSize-1:0][31:0] progbuf_i,
+    input  wire [31:0]                   data_i,
+    output wire [31:0]                   data_o,
+    output wire                          data_valid_o,
+    input  wire                          cmd_valid_i,
+    input  wire [31:0]                   cmd_i,
+    output wire                          cmderror_valid_o,
+    output wire [2:0]                    cmderror_o,
+    output wire                          cmdbusy_o,
+
+    input  wire                          req_i,
+    input  wire                          we_i,
+    input  wire [31:0]                   addr_i,
+    input  wire [3:0]                    be_i,
+    input  wire [31:0]                   wdata_i,
+    output wire                          gnt_o,
+    output wire                          rvalid_o,
+    output wire [31:0]                   rdata_o
+
+    );
+
+    // 16KB
+    localparam DbgAddressBits       = 12;
+    // x10/a0
+    localparam LoadBaseAddr         = 5'd10;
+
+    localparam Data0Addr            = `DataBaseAddr;
+    localparam Data1Addr            = `DataBaseAddr + 4;
+    localparam Data2Addr            = `DataBaseAddr + 8;
+    localparam Data3Addr            = `DataBaseAddr + 12;
+    localparam Data4Addr            = `DataBaseAddr + 16;
+
+    localparam Progbuf0Addr         = `ProgbufBaseAddr;
+    localparam Progbuf1Addr         = `ProgbufBaseAddr + 4;
+    localparam Progbuf2Addr         = `ProgbufBaseAddr + 8;
+    localparam Progbuf3Addr         = `ProgbufBaseAddr + 12;
+    localparam Progbuf4Addr         = `ProgbufBaseAddr + 16;
+    localparam Progbuf5Addr         = `ProgbufBaseAddr + 20;
+    localparam Progbuf6Addr         = `ProgbufBaseAddr + 24;
+    localparam Progbuf7Addr         = `ProgbufBaseAddr + 28;
+    localparam Progbuf8Addr         = `ProgbufBaseAddr + 32;
+    localparam Progbuf9Addr         = `ProgbufBaseAddr + 36;
+
+    localparam AbstractCmd0Addr     = `AbstCmdBaseAddr;
+    localparam AbstractCmd1Addr     = `AbstCmdBaseAddr + 4;
+    localparam AbstractCmd2Addr     = `AbstCmdBaseAddr + 8;
+    localparam AbstractCmd3Addr     = `AbstCmdBaseAddr + 12;
+    localparam AbstractCmd4Addr     = `AbstCmdBaseAddr + 16;
+    localparam AbstractCmd5Addr     = `AbstCmdBaseAddr + 20;
+    localparam AbstractCmd6Addr     = `AbstCmdBaseAddr + 24;
+    localparam AbstractCmd7Addr     = `AbstCmdBaseAddr + 28;
+    localparam AbstractCmd8Addr     = `AbstCmdBaseAddr + 32;
+    localparam AbstractCmd9Addr     = `AbstCmdBaseAddr + 36;
+
+    localparam WhereToAddr          = 12'h300;
+    localparam FlagsBaseAddr        = 12'h400;
+    localparam FlagsEndAddr         = 12'h7FF;
+
+    localparam HaltedAddr           = 12'h100;
+    localparam GoingAddr            = 12'h104;
+    localparam ResumingAddr         = 12'h108;
+    localparam ExceptionAddr        = 12'h10C;
+
+    localparam CmdAccessRegister    = 8'h0;
+    localparam CmdQuickAccess       = 8'h1;
+    localparam CmdAccessMemory      = 8'h2;
+
+    localparam CmdErrorNone         = 3'h0;
+    localparam CmdErrorHaltResume   = 3'h4;
+    localparam CmdErrorNotSupport   = 3'h2;
+    localparam CmdErrorException    = 3'h3;
+
+    localparam illegal              = 32'h00000000;
+    localparam nop                  = 32'h00000013;
+    localparam ebreak               = 32'h00100073;
+
+    localparam S_IDLE               = 4'b0001;
+    localparam S_RESUME             = 4'b0010;
+    localparam S_GO                 = 4'b0100;
+    localparam S_CMD_EXECUTING      = 4'b1000;
+
+
+    function automatic [31:0] jal;
+        input [4:0] rd;
+        input [20:0] imm;
+
+        jal = {imm[20], imm[10:1], imm[11], imm[19:12], rd, 7'h6f};
+    endfunction
+
+    function automatic [31:0] slli;
+        input [4:0] rd;
+        input [4:0] rs1;
+        input [5:0] shamt;
+
+        slli = {6'b0, shamt[5:0], rs1, 3'h1, rd, 7'h13};
+    endfunction
+
+    function automatic [31:0] srli;
+        input [4:0] rd;
+        input [4:0] rs1;
+        input [5:0] shamt;
+
+        srli = {6'b0, shamt[5:0], rs1, 3'h5, rd, 7'h13};
+    endfunction
+
+    function automatic [31:0] load;
+        input [2:0]  size;
+        input [4:0]  dest;
+        input [4:0]  base;
+        input [11:0] offset;
+
+        load = {offset[11:0], base, size, dest, 7'h03};
+    endfunction
+
+    function automatic [31:0] auipc;
+        input [4:0]  rd;
+        input [20:0] imm;
+
+        auipc = {imm[20], imm[10:1], imm[11], imm[19:12], rd, 7'h17};
+    endfunction
+
+    function automatic [31:0] store;
+        input [2:0]  size;
+        input [4:0]  src;
+        input [4:0]  base;
+        input [11:0] offset;
+
+        store = {offset[11:5], src, base, size, offset[4:0], 7'h23};
+    endfunction
+
+    function automatic [31:0] csrw;
+        input [11:0] csr;
+        input [4:0] rs1;
+
+        csrw = {csr, rs1, 3'h1, 5'h0, 7'h73};
+    endfunction
+
+    function automatic [31:0] csrr;
+        input [11:0] csr;
+        input [4:0] dest;
+
+        csrr = {csr, 5'h0, 3'h2, dest, 7'h73};
+    endfunction
+
+
+    reg[3:0] state_d, state_q;
+    reg[31:0] rdata_d, rdata_q;
+    reg halted_d, halted_q;
+    reg resuming_d, resuming_q;
+    reg resume, go, going;
+    reg fwd_rom_q;
+    reg data_valid;
+    reg cmdbusy;
+    reg halted_aligned;
+    reg rvalid_q;
+    wire fwd_rom_d;
+    wire[31:0] rom_rdata;
+    reg[31:0] data_bits;
+    reg[9:0][31:0] abstract_cmd;
+    reg unsupported_command;
+    reg cmderror_valid;
+    reg[2:0] cmderror;
+    reg exception;
+    wire[11:0] progbuf_baseaddr = Progbuf0Addr;
+    wire[11:0] abstractcmd_baseaddr = AbstractCmd0Addr;
+    wire[7:0] cmd_type = cmd_i[31:24];
+    wire cmd_postexec = cmd_i[18];
+    wire cmd_transfer = cmd_i[17];
+    wire cmd_write = cmd_i[16];
+    wire[15:0] cmd_regno = cmd_i[15:0];
+    wire[2:0] cmd_aarsize = cmd_i[22:20];
+    wire cmd_aarpostincrement = cmd_i[19];
+
+    wire[31:0] word_mux;
+    assign word_mux = fwd_rom_q ? rom_rdata : rdata_q;
+    assign rdata_o = word_mux;
+
+    assign halted_o = halted_q;
+    assign resumeack_o = resuming_q;
+    assign gnt_o = req_i;
+    assign rvalid_o = rvalid_q;
+
+    always @ (*) begin
+        state_d = state_q;
+        resume = 1'b0;
+        go = 1'b0;
+        cmdbusy = 1'b1;
+        cmderror_valid = 1'b0;
+        cmderror = CmdErrorNone;
+
+        case (state_q)
+            S_IDLE: begin
+                cmdbusy = 1'b0;
+                if (resumereq_i && (!resuming_q) &&
+                    halted_q && (!haltreq_i)) begin
+                    state_d = S_RESUME;
+                end
+                if (cmd_valid_i) begin
+                    if (!halted_q) begin
+                        cmderror_valid = 1'b1;
+                        cmderror = CmdErrorHaltResume;
+                    end else if (unsupported_command) begin
+                        cmderror_valid = 1'b1;
+                        cmderror = CmdErrorNotSupport;
+                    end else begin
+                        state_d = S_GO;
+                    end
+                end
+            end
+
+            S_GO: begin
+                cmdbusy = 1'b1;
+                go = 1'b1;
+                if (going) begin
+                    state_d = S_CMD_EXECUTING;
+                end
+            end
+
+            S_RESUME: begin
+                resume = 1'b1;
+                cmdbusy = 1'b1;
+                if (resuming_q) begin
+                    state_d = S_IDLE;
+                end
+            end
+
+            S_CMD_EXECUTING: begin
+                cmdbusy = 1'b1;
+                go = 1'b0;
+                if (halted_aligned) begin
+                    state_d = S_IDLE;
+                end
+            end
+
+            default:;
+        endcase
+
+        if (exception) begin
+            cmderror_valid = 1'b1;
+            cmderror = CmdErrorException;
+        end
+    end
+
+    assign cmderror_valid_o = cmderror_valid;
+    assign cmderror_o = cmderror;
+    assign cmdbusy_o = cmdbusy;
+
+    always @ (*) begin
+        rdata_d = rdata_q;
+        halted_d = halted_q;
+        resuming_d = resuming_q;
+
+        going = 1'b0;
+        exception = 1'b0;
+        halted_aligned = 1'b0;
+
+        data_valid = 1'b0;
+        data_bits = data_i;
+
+        if (clear_resumeack_i) begin
+            resuming_d = 1'b0;
+        end
+
+        if (ndmreset_i & (!haltreq_i)) begin
+            halted_d = 1'b0;
+        end
+
+        // write
+        if (req_i & we_i) begin
+            case (addr_i[DbgAddressBits-1:0])
+                HaltedAddr: begin
+                    halted_d = 1'b1;
+                    halted_aligned = 1'b1;
+                end
+
+                GoingAddr: begin
+                    going = 1'b1;
+                end
+
+                ResumingAddr: begin
+                    halted_d = 1'b0;
+                    resuming_d = 1'b1;
+                end
+
+                ExceptionAddr: begin
+                    exception = 1'b1;
+                end
+
+                Data0Addr, Data1Addr, Data2Addr,
+                Data3Addr, Data4Addr: begin
+                    data_valid = 1'b1;
+                    if (be_i[0])
+                        data_bits[7:0] = wdata_i[7:0];
+                    if (be_i[1])
+                        data_bits[15:8] = wdata_i[15:8];
+                    if (be_i[2])
+                        data_bits[23:16] = wdata_i[23:16];
+                    if (be_i[3])
+                        data_bits[31:24] = wdata_i[31:24];
+                end
+
+                default:;
+            endcase
+        // read
+        end else if (req_i & (!we_i)) begin
+            case (addr_i[DbgAddressBits-1:0])
+                WhereToAddr: begin
+                    if (cmdbusy & (cmd_type == CmdAccessRegister)) begin
+                        // execute program buf
+                        if (cmd_postexec) begin
+                            rdata_d = jal(5'h0, {9'h0, progbuf_baseaddr-WhereToAddr});
+                        // execute command
+                        end else begin
+                            rdata_d = jal(5'h0, {9'h0, abstractcmd_baseaddr-WhereToAddr});
+                        end
+                    end
+                end
+
+                // harts are polling for flags here
+                FlagsBaseAddr: begin
+                    rdata_d = {30'b0, resume, go};
+                end
+
+                Data0Addr, Data1Addr, Data2Addr, Data3Addr,
+                Data4Addr: begin
+                    rdata_d = data_i;
+                end
+
+                Progbuf0Addr, Progbuf1Addr, Progbuf2Addr, Progbuf3Addr,
+                Progbuf4Addr, Progbuf5Addr, Progbuf6Addr, Progbuf7Addr,
+                Progbuf8Addr, Progbuf9Addr: begin
+                    rdata_d = progbuf_i[addr_i[DbgAddressBits-1:2] -
+                              progbuf_baseaddr[DbgAddressBits-1:2]];
+                end
+
+                AbstractCmd0Addr, AbstractCmd1Addr, AbstractCmd2Addr, AbstractCmd3Addr,
+                AbstractCmd4Addr, AbstractCmd5Addr, AbstractCmd6Addr, AbstractCmd7Addr,
+                AbstractCmd8Addr, AbstractCmd9Addr: begin
+                    rdata_d = abstract_cmd[addr_i[DbgAddressBits-1:2] -
+                              abstractcmd_baseaddr[DbgAddressBits-1:2]];
+                end
+
+                default:;
+            endcase
+        end
+
+    end
+
+    assign data_valid_o = data_valid;
+    assign data_o = data_bits;
+
+    always @ (*) begin
+        unsupported_command = 1'b0;
+
+        abstract_cmd[0] = illegal;
+        abstract_cmd[1] = auipc(5'd10, 21'd0);          // auipc a0, 0
+        abstract_cmd[2] = srli(5'd10, 5'd10, 6'd12);    // srli a0, a0, 12
+        abstract_cmd[3] = slli(5'd10, 5'd10, 6'd12);    // slli a0, a0, 12
+        abstract_cmd[4] = nop;
+        abstract_cmd[5] = nop;
+        abstract_cmd[6] = nop;
+        abstract_cmd[7] = nop;
+        abstract_cmd[8] = csrr(`CSR_DSCRATCH1, 5'd10);  // csrr dscratch1, a0  恢复a0寄存器的值
+        abstract_cmd[9] = ebreak;
+
+        case (cmd_type)
+            CmdAccessRegister: begin
+                // unsupported reg size
+                if (cmd_aarsize > 3'h2 || cmd_aarpostincrement || cmd_regno >= 16'h1020) begin
+                    abstract_cmd[0] = ebreak;
+                    unsupported_command = 1'b1;
+                end else begin
+                    // store a0 in dscratch1
+                    abstract_cmd[0] = csrw(`CSR_DSCRATCH1, 5'd10);  // csrw dscratch1, a0  保存a0寄存器的值
+                    // write regs
+                    if (cmd_transfer && cmd_write) begin
+                        // a0
+                        if (cmd_regno[12] && (cmd_regno[4:0] == 5'd10)) begin
+                            // store s0 in dscratch
+                            abstract_cmd[4] = csrw(`CSR_DSCRATCH0, 5'd8);
+                            // load from data register
+                            abstract_cmd[5] = load(cmd_aarsize, 5'd8, LoadBaseAddr, `DataBaseAddr);
+                            // and store it in the corresponding CSR
+                            abstract_cmd[6] = csrw(`CSR_DSCRATCH1, 5'd8);
+                            // restore s0 again from dscratch
+                            abstract_cmd[7] = csrr(`CSR_DSCRATCH0, 5'd8);
+                        // GPR access
+                        end else if (cmd_regno[12]) begin
+                            abstract_cmd[4] = load(cmd_aarsize, cmd_regno[4:0], LoadBaseAddr, `DataBaseAddr);
+                        // CSR access
+                        end else begin
+                            // data register to CSR
+                            // store s0 in dscratch
+                            abstract_cmd[4] = csrw(`CSR_DSCRATCH0, 5'd8);
+                            // load from data register
+                            abstract_cmd[5] = load(cmd_aarsize, 5'd8, LoadBaseAddr, `DataBaseAddr);
+                            // and store it in the corresponding CSR
+                            abstract_cmd[6] = csrw(cmd_regno[11:0], 5'd8);
+                            // restore s0 again from dscratch
+                            abstract_cmd[7] = csrr(`CSR_DSCRATCH0, 5'd8);
+                        end
+                    // read regs
+                    end else if (cmd_transfer && (!cmd_write)) begin
+                        // a0
+                        if (cmd_regno[12] && (cmd_regno[4:0] == 5'd10)) begin
+                            // store s0 in dscratch
+                            abstract_cmd[4] = csrw(`CSR_DSCRATCH0, 5'd8);
+                            // read value from CSR into s0
+                            abstract_cmd[5] = csrr(`CSR_DSCRATCH1, 5'd8);
+                            // and store s0 into data section
+                            abstract_cmd[6] = store(cmd_aarsize, 5'd8, LoadBaseAddr, `DataBaseAddr);
+                            // restore s0 again from dscratch
+                            abstract_cmd[7] = csrr(`CSR_DSCRATCH0, 5'd8);
+                        // GPR access
+                        end else if (cmd_regno[12]) begin
+                            abstract_cmd[4] = store(cmd_aarsize, cmd_regno[4:0], LoadBaseAddr, `DataBaseAddr);
+                        // CSR access
+                        end else begin
+                            // CSR register to data
+                            // store s0 in dscratch
+                            abstract_cmd[4] = csrw(`CSR_DSCRATCH0, 5'd8);
+                            // read value from CSR into s0
+                            abstract_cmd[5] = csrr(cmd_regno[11:0], 5'd8);
+                            // and store s0 into data section
+                            abstract_cmd[6] = store(cmd_aarsize, 5'd8, LoadBaseAddr, `DataBaseAddr);
+                            // restore s0 again from dscratch
+                            abstract_cmd[7] = csrr(`CSR_DSCRATCH0, 5'd8);
+                        end
+                    end
+                end
+                if (cmd_postexec && (!unsupported_command)) begin
+                    // issue a nop, we will automatically run into the program buffer
+                    abstract_cmd[9] = nop;
+                end
+            end
+
+            // not supported at the moment:
+            // CmdQuickAccess:;
+            // CmdAccessMemory:;
+            default: begin
+                unsupported_command = 1'b1;
+                abstract_cmd[0] = ebreak;
+            end
+        endcase
+    end
+
+    wire[31:0] rom_addr;
+    assign rom_addr = addr_i;
+    assign fwd_rom_d = addr_i[DbgAddressBits-1:0] >= `HaltAddress;
+
+    debug_rom u_debug_rom (
+        .clk_i   ( clk       ),
+        .req_i   ( req_i     ),
+        .addr_i  ( rom_addr  ),
+        .rdata_o ( rom_rdata )
+    );
+
+    always @ (posedge clk or negedge rst_n) begin
+        if (!rst_n) begin
+            rdata_q <= 32'h0;
+            fwd_rom_q <= 1'b0;
+            halted_q <= 1'b0;
+            resuming_q <= 1'b0;
+            rvalid_q <= 1'b0;
+        end else begin
+            rdata_q <= rdata_d;
+            fwd_rom_q <= fwd_rom_d;
+            halted_q <= halted_d;
+            resuming_q <= resuming_d;
+            rvalid_q <= req_i;
+        end
+    end
+
+    always @ (posedge clk or negedge rst_n) begin
+        if (!rst_n) begin
+            state_q <= S_IDLE;
+        end else begin
+            state_q <= state_d;
+        end
+    end
+
+endmodule

rtl/debug/jtag_sba.sv

@@ -0,0 +1,191 @@
+ /*                                                                      
+ Copyright 2021 Blue Liang, liangkangnan@163.com
+                                                                         
+ Licensed under the Apache License, Version 2.0 (the "License");         
+ you may not use this file except in compliance with the License.        
+ You may obtain a copy of the License at                                 
+                                                                         
+     http://www.apache.org/licenses/LICENSE-2.0                          
+                                                                         
+ Unless required by applicable law or agreed to in writing, software    
+ distributed under the License is distributed on an "AS IS" BASIS,       
+ WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ See the License for the specific language governing permissions and     
+ limitations under the License.                                          
+ */
+
+
+module jtag_sba(
+
+    input  wire                     clk,
+    input  wire                     rst_n,
+
+    input  wire [31:0]              sbaddress_i,
+    input  wire                     sbaddress_write_valid_i,
+
+    input  wire                     sbreadonaddr_i,
+    output wire [31:0]              sbaddress_o,
+    input  wire                     sbautoincrement_i,
+    input  wire [2:0]               sbaccess_i,
+
+    input  wire                     sbreadondata_i,
+    input  wire [31:0]              sbdata_i,
+    input  wire                     sbdata_read_valid_i,
+    input  wire                     sbdata_write_valid_i,
+
+    output wire [31:0]              sbdata_o,
+    output wire                     sbdata_valid_o,
+
+    output wire                     sbbusy_o,
+    output wire [2:0]               sberror_o,
+
+    output wire                     master_req_o,
+    input  wire                     master_gnt_i,
+    input  wire                     master_rvalid_i,
+    output wire                     master_we_o,
+    output wire [3:0]               master_be_o,
+    output wire [31:0]              master_addr_o,
+    output wire [31:0]              master_wdata_o,
+    input  wire [31:0]              master_rdata_i,
+    input  wire                     master_err_i
+
+    );
+
+    localparam S_IDLE       = 4'b0001;
+    localparam S_READ       = 4'b0010;
+    localparam S_WAIT       = 4'b0100;
+    localparam S_WRITE      = 4'b1000;
+
+    reg[3:0] state_d, state_q;
+    reg[2:0] sberror;
+    reg[3:0] be_mask;
+    reg[1:0] be_index;
+
+    reg master_req;
+    reg master_we;
+    reg[3:0] master_be;
+    reg[31:0] master_addr;
+    reg[31:0] master_wdata;
+    reg[31:0] sbaddress;
+
+    wire[31:0] sbaddress_new;
+
+    assign sbaddress_new = sbaddress_i + (32'h1 << sbaccess_i);
+
+    assign sbbusy_o = (state_q != S_IDLE);
+
+    always @ (*) begin
+        be_mask = 4'b0;
+        be_index = sbaddress_i[1:0];
+
+        // generate byte enable mask
+        case (sbaccess_i)
+            3'b000: begin
+                be_mask[be_index] = 1'b1;
+            end
+
+            3'b001: begin
+                if (be_index == 2'h0) begin
+                    be_mask[1:0] = 2'b11;
+                end else if (be_index == 2'h2) begin
+                    be_mask[3:2] = 2'b11;
+                end
+            end
+
+            3'b010: begin
+                be_mask = 4'b1111;
+            end
+
+            default:;
+        endcase
+    end
+
+    // 访存状态机
+    always @ (*) begin
+        state_d = state_q;
+
+        sbaddress = sbaddress_i;
+
+        master_addr = sbaddress_i;
+        master_wdata = sbdata_i;
+        master_req = 1'b0;
+        master_be = 4'b0;
+        master_we = 1'b0;
+
+        sberror = 3'b0;
+
+        case (state_q)
+            S_IDLE: begin
+                // debugger requested a read
+                if (sbaddress_write_valid_i && sbreadonaddr_i) begin
+                    state_d = S_READ;
+                end
+                // debugger requested a write
+                if (sbdata_write_valid_i) begin
+                    state_d = S_WRITE;
+                end
+                // perform another read
+                if (sbdata_read_valid_i && sbreadondata_i) begin
+                    state_d = S_READ;
+                end
+            end
+
+            // 读内存
+            S_READ: begin
+                master_req = 1'b1;
+                master_be = 4'b1111;
+                if (master_gnt_i) begin
+                    state_d = S_WAIT;
+                end
+            end
+
+            // 写内存
+            S_WRITE: begin
+                master_req = 1'b1;
+                master_be = be_mask;
+                master_we = 1'b1;
+                if (master_gnt_i) begin
+                    state_d = S_WAIT;
+                end
+            end
+
+            // 等待读写完成
+            S_WAIT: begin
+                if (master_rvalid_i) begin
+                    state_d = S_IDLE;
+                    if (sbautoincrement_i) begin
+                        sbaddress = sbaddress_new;
+                    end
+                end
+            end
+
+            default: state_d = S_IDLE;
+        endcase
+
+        if ((sbaccess_i > 3'h2) & (state_q != S_IDLE)) begin
+            master_req = 1'b0;
+            state_d = S_IDLE;
+            sberror = 3'h3;
+        end
+    end
+
+    assign master_req_o     = master_req;
+    assign master_we_o      = master_we;
+    assign master_be_o      = master_be;
+    assign master_addr_o    = master_addr;
+    assign master_wdata_o   = master_wdata;
+
+    assign sbdata_valid_o   = master_rvalid_i & (state_q == S_WAIT);
+    assign sbdata_o         = master_rdata_i;
+    assign sberror_o        = sberror;
+    assign sbaddress_o      = sbaddress;
+
+    always @ (posedge clk or negedge rst_n) begin
+        if (!rst_n) begin
+            state_q <= S_IDLE;
+        end else begin
+            state_q <= state_d;
+        end
+    end
+
+endmodule

rtl/debug/jtag_tap.sv

@@ -0,0 +1,192 @@
+ /*                                                                      
+ Copyright 2021 Blue Liang, liangkangnan@163.com
+                                                                         
+ Licensed under the Apache License, Version 2.0 (the "License");         
+ you may not use this file except in compliance with the License.        
+ You may obtain a copy of the License at                                 
+                                                                         
+     http://www.apache.org/licenses/LICENSE-2.0                          
+                                                                         
+ Unless required by applicable law or agreed to in writing, software    
+ distributed under the License is distributed on an "AS IS" BASIS,       
+ WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ See the License for the specific language governing permissions and     
+ limitations under the License.                                          
+ */
+
+
+module jtag_tap #(
+    parameter DMI_ADDR_BITS = 7,
+    parameter DMI_DATA_BITS = 32,
+    parameter DMI_OP_BITS   = 2,
+    parameter IR_BITS       = 5,
+    parameter TAP_REQ_BITS  = DMI_ADDR_BITS + DMI_DATA_BITS + DMI_OP_BITS,
+    parameter DTM_RESP_BITS = TAP_REQ_BITS
+    )(
+
+    input wire  jtag_tck_i,     // JTAG test clock pad
+    input wire  jtag_tdi_i,     // JTAG test data input pad
+    input wire  jtag_tms_i,     // JTAG test mode select pad
+    input wire  jtag_trst_ni,   // JTAG test reset pad
+    output wire jtag_tdo_o,     // JTAG test data output pad
+
+    output wire tap_req_o,
+    output wire[TAP_REQ_BITS-1:0] tap_data_o,
+    output wire dmireset_o,
+
+    input wire[DTM_RESP_BITS-1:0] dtm_data_i,
+    input wire[31:0] idcode_i,
+    input wire[31:0] dtmcs_i
+
+    );
+
+    localparam SHIFT_REG_BITS    = TAP_REQ_BITS;
+
+    localparam TEST_LOGIC_RESET  = 16'h0001;
+    localparam RUN_TEST_IDLE     = 16'h0002;
+    localparam SELECT_DR         = 16'h0004;
+    localparam CAPTURE_DR        = 16'h0008;
+    localparam SHIFT_DR          = 16'h0010;
+    localparam EXIT1_DR          = 16'h0020;
+    localparam PAUSE_DR          = 16'h0040;
+    localparam EXIT2_DR          = 16'h0080;
+    localparam UPDATE_DR         = 16'h0100;
+    localparam SELECT_IR         = 16'h0200;
+    localparam CAPTURE_IR        = 16'h0400;
+    localparam SHIFT_IR          = 16'h0800;
+    localparam EXIT1_IR          = 16'h1000;
+    localparam PAUSE_IR          = 16'h2000;
+    localparam EXIT2_IR          = 16'h4000;
+    localparam UPDATE_IR         = 16'h8000;
+
+    // DTM regs
+    localparam REG_BYPASS        = 5'b11111;
+    localparam REG_IDCODE        = 5'b00001;
+    localparam REG_DMI           = 5'b10001;
+    localparam REG_DTMCS         = 5'b10000;
+
+    reg[IR_BITS-1:0] ir_reg;
+    reg[SHIFT_REG_BITS-1:0] shift_reg;
+
+    reg[15:0] tap_state;
+    reg[15:0] next_state;
+
+    always @ (posedge jtag_tck_i or negedge jtag_trst_ni) begin
+        if (!jtag_trst_ni) begin
+            tap_state <= TEST_LOGIC_RESET;
+        end else begin
+            tap_state <= next_state;
+        end
+    end
+
+    // state switch
+    always @ (*) begin
+        case (tap_state)
+            TEST_LOGIC_RESET  : next_state = jtag_tms_i ? TEST_LOGIC_RESET : RUN_TEST_IDLE;
+            RUN_TEST_IDLE     : next_state = jtag_tms_i ? SELECT_DR        : RUN_TEST_IDLE;
+            SELECT_DR         : next_state = jtag_tms_i ? SELECT_IR        : CAPTURE_DR;
+            CAPTURE_DR        : next_state = jtag_tms_i ? EXIT1_DR         : SHIFT_DR;
+            SHIFT_DR          : next_state = jtag_tms_i ? EXIT1_DR         : SHIFT_DR;
+            EXIT1_DR          : next_state = jtag_tms_i ? UPDATE_DR        : PAUSE_DR;
+            PAUSE_DR          : next_state = jtag_tms_i ? EXIT2_DR         : PAUSE_DR;
+            EXIT2_DR          : next_state = jtag_tms_i ? UPDATE_DR        : SHIFT_DR;
+            UPDATE_DR         : next_state = jtag_tms_i ? SELECT_DR        : RUN_TEST_IDLE;
+            SELECT_IR         : next_state = jtag_tms_i ? TEST_LOGIC_RESET : CAPTURE_IR;
+            CAPTURE_IR        : next_state = jtag_tms_i ? EXIT1_IR         : SHIFT_IR;
+            SHIFT_IR          : next_state = jtag_tms_i ? EXIT1_IR         : SHIFT_IR;
+            EXIT1_IR          : next_state = jtag_tms_i ? UPDATE_IR        : PAUSE_IR;
+            PAUSE_IR          : next_state = jtag_tms_i ? EXIT2_IR         : PAUSE_IR;
+            EXIT2_IR          : next_state = jtag_tms_i ? UPDATE_IR        : SHIFT_IR;
+            UPDATE_IR         : next_state = jtag_tms_i ? SELECT_DR        : RUN_TEST_IDLE;
+            default           : next_state = TEST_LOGIC_RESET;
+        endcase
+    end
+
+    // IR or DR shift
+    always @ (posedge jtag_tck_i or negedge jtag_trst_ni) begin
+        if (!jtag_trst_ni) begin
+            shift_reg <= {SHIFT_REG_BITS{1'b0}};
+        end else begin
+            case (tap_state)
+                // IR
+                CAPTURE_IR: shift_reg <= {{(SHIFT_REG_BITS-1){1'b0}}, 1'b1}; //JTAG spec says it must be 2'b01
+                SHIFT_IR  : shift_reg <= {{(SHIFT_REG_BITS-IR_BITS){1'b0}}, jtag_tdi_i, shift_reg[IR_BITS-1:1]}; // right shift 1 bit
+                // DR
+                CAPTURE_DR: case (ir_reg) 
+                                REG_BYPASS     : shift_reg <= {(SHIFT_REG_BITS){1'b0}};
+                                REG_IDCODE     : shift_reg <= {{(SHIFT_REG_BITS-DMI_DATA_BITS){1'b0}}, idcode_i};
+                                REG_DTMCS      : shift_reg <= {{(SHIFT_REG_BITS-DMI_DATA_BITS){1'b0}}, dtmcs_i};
+                                REG_DMI        : shift_reg <= dtm_data_i;
+                                default        : shift_reg <= {(SHIFT_REG_BITS){1'b0}};
+                            endcase
+                SHIFT_DR  : case (ir_reg) 
+                                REG_BYPASS     : shift_reg <= {{(SHIFT_REG_BITS-1){1'b0}}, jtag_tdi_i};    // in = out
+                                REG_IDCODE     : shift_reg <= {{(SHIFT_REG_BITS-DMI_DATA_BITS){1'b0}}, jtag_tdi_i, shift_reg[31:1]}; // right shift 1 bit
+                                REG_DTMCS      : shift_reg <= {{(SHIFT_REG_BITS-DMI_DATA_BITS){1'b0}}, jtag_tdi_i, shift_reg[31:1]}; // right shift 1 bit
+                                REG_DMI        : shift_reg <= {jtag_tdi_i, shift_reg[SHIFT_REG_BITS-1:1]}; // right shift 1 bit
+                                default        : shift_reg <= {{(SHIFT_REG_BITS-1){1'b0}} , jtag_tdi_i};
+                            endcase 
+            endcase
+        end
+    end
+
+    reg tap_req_q;
+    reg[TAP_REQ_BITS-1:0] tap_data_q;
+
+    // send request to DTM module
+    always @ (posedge jtag_tck_i or negedge jtag_trst_ni) begin
+        if (!jtag_trst_ni) begin
+            tap_req_q <= 1'b0;
+            tap_data_q <= {TAP_REQ_BITS{1'b0}};
+        end else begin
+            if ((tap_state == UPDATE_DR) && (ir_reg == REG_DMI)) begin
+                tap_req_q <= 1'b1;
+                tap_data_q <= shift_reg;
+            end else begin
+                tap_req_q <= 1'b0;
+            end
+        end
+    end
+
+    assign tap_req_o = tap_req_q;
+    assign tap_data_o = tap_data_q;
+
+    // ir_reg
+    always @ (negedge jtag_tck_i) begin
+        if (tap_state == TEST_LOGIC_RESET) begin
+            ir_reg <= REG_IDCODE;
+        end else if (tap_state == UPDATE_IR) begin
+            ir_reg <= shift_reg[IR_BITS-1:0];
+        end
+    end
+
+    reg jtag_tdo_q;
+
+    // TDO output
+    always @ (negedge jtag_tck_i) begin
+        if ((tap_state == SHIFT_IR) || (tap_state == SHIFT_DR)) begin
+            jtag_tdo_q <= shift_reg[0];
+        end else begin
+            jtag_tdo_q <= 1'b0;
+        end
+    end
+
+    assign jtag_tdo_o = jtag_tdo_q;
+
+    reg dmireset_q;
+
+    always @ (posedge jtag_tck_i or negedge jtag_trst_ni) begin
+        if (!jtag_trst_ni) begin
+            dmireset_q <= 1'b0;
+        end else begin
+            if ((tap_state == UPDATE_DR) && (ir_reg == REG_DTMCS)) begin
+                dmireset_q <= shift_reg[16];
+            end else begin
+                dmireset_q <= 1'b0;
+            end
+        end
+    end
+
+    assign dmireset_o = dmireset_q;
+
+endmodule

rtl/debug/jtag_top.sv

@@ -0,0 +1,168 @@
+ /*                                                                      
+ Copyright 2021 Blue Liang, liangkangnan@163.com
+                                                                         
+ Licensed under the Apache License, Version 2.0 (the "License");         
+ you may not use this file except in compliance with the License.        
+ You may obtain a copy of the License at                                 
+                                                                         
+     http://www.apache.org/licenses/LICENSE-2.0                          
+                                                                         
+ Unless required by applicable law or agreed to in writing, software    
+ distributed under the License is distributed on an "AS IS" BASIS,       
+ WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ See the License for the specific language governing permissions and     
+ limitations under the License.                                          
+ */
+
+
+module jtag_top(
+
+    input wire                      clk_i,
+    input wire                      rst_ni,
+
+    output wire                     debug_req_o,
+    output wire                     ndmreset_o,
+    output wire                     halted_o,
+
+    input wire                      jtag_tck_i,     // JTAG test clock pad
+    input wire                      jtag_tdi_i,     // JTAG test data input pad
+    input wire                      jtag_tms_i,     // JTAG test mode select pad
+    input wire                      jtag_trst_ni,   // JTAG test reset pad
+    output wire                     jtag_tdo_o,     // JTAG test data output pad
+
+    output wire                     master_req_o,
+    input  wire                     master_gnt_i,
+    input  wire                     master_rvalid_i,
+    output wire                     master_we_o,
+    output wire [3:0]               master_be_o,
+    output wire [31:0]              master_addr_o,
+    output wire [31:0]              master_wdata_o,
+    input  wire [31:0]              master_rdata_i,
+    input  wire                     master_err_i,
+
+    input  wire                     slave_req_i,
+    input  wire                     slave_we_i,
+    input  wire [31:0]              slave_addr_i,
+    input  wire [3:0]               slave_be_i,
+    input  wire [31:0]              slave_wdata_i,
+    output wire                     slave_gnt_o,
+    output wire                     slave_rvalid_o,
+    output wire [31:0]              slave_rdata_o
+
+    );
+
+    // addr + data + op = 7 + 32 + 2 = 41
+    localparam DMI_DATA_WIDTH = 41;
+
+
+    wire [DMI_DATA_WIDTH-1:0]   dm_to_dmi_data;
+    wire                        dm_to_dmi_valid;
+    wire                        dm_to_dmi_ready;
+    wire [DMI_DATA_WIDTH-1:0]   dmi_to_dm_data;
+    wire                        dmi_to_dm_valid;
+    wire                        dmi_to_dm_ready;
+
+    jtag_dm #(
+
+    ) u_jtag_dm (
+        .clk            (clk_i),
+        .rst_n          (rst_ni),
+        .dmi_data_i     (dmi_to_dm_data),
+        .dmi_valid_i    (dmi_to_dm_valid),
+        .dm_ready_o     (dm_to_dmi_ready),
+        .dm_data_o      (dm_to_dmi_data),
+        .dm_valid_o     (dm_to_dmi_valid),
+        .dmi_ready_i    (dmi_to_dm_ready),
+        .debug_req_o    (debug_req_o),
+        .ndmreset_o     (ndmreset_o),
+        .halted_o       (halted_o),
+        .master_req_o   (master_req_o),
+        .master_gnt_i   (master_gnt_i),
+        .master_rvalid_i(master_rvalid_i),
+        .master_we_o    (master_we_o),
+        .master_be_o    (master_be_o),
+        .master_addr_o  (master_addr_o),
+        .master_wdata_o (master_wdata_o),
+        .master_rdata_i (master_rdata_i),
+        .master_err_i   (master_err_i),
+        .slave_req_i    (slave_req_i),
+        .slave_we_i     (slave_we_i),
+        .slave_addr_i   (slave_addr_i),
+        .slave_be_i     (slave_be_i),
+        .slave_wdata_i  (slave_wdata_i),
+        .slave_gnt_o    (slave_gnt_o),
+        .slave_rvalid_o (slave_rvalid_o),
+        .slave_rdata_o  (slave_rdata_o)
+    );
+
+    wire [DMI_DATA_WIDTH-1:0]   dtm_to_dmi_data;
+    wire                        dtm_to_dmi_valid;
+    wire                        dtm_to_dmi_ready;
+    wire [DMI_DATA_WIDTH-1:0]   dmi_to_dtm_data;
+    wire                        dmi_to_dtm_valid;
+    wire                        dmi_to_dtm_ready;
+
+    jtag_dmi #(
+
+    ) u_jtag_dmi (
+        .jtag_tck_i     (jtag_tck_i),
+        .jtag_trst_ni   (jtag_trst_ni),
+        .jtag_data_i    (dtm_to_dmi_data),
+        .jtag_valid_i   (dtm_to_dmi_valid),
+        .jtag_ready_o   (dmi_to_dtm_ready),
+        .jtag_data_o    (dmi_to_dtm_data),
+        .jtag_valid_o   (dmi_to_dtm_valid),
+        .jtag_ready_i   (dtm_to_dmi_ready),
+        .clk_i          (clk_i),
+        .rst_ni         (rst_ni),
+        .core_data_i    (dm_to_dmi_data),
+        .core_valid_i   (dm_to_dmi_valid),
+        .core_ready_o   (dmi_to_dm_ready),
+        .core_data_o    (dmi_to_dm_data),
+        .core_valid_o   (dmi_to_dm_valid),
+        .core_ready_i   (dm_to_dmi_ready)
+    );
+
+    wire                        tap_to_dtm_req;
+    wire [DMI_DATA_WIDTH-1:0]   tap_to_dtm_data;
+    wire [DMI_DATA_WIDTH-1:0]   dtm_to_tap_data;
+    wire [31:0]                 idcode;
+    wire [31:0]                 dtmcs;
+    wire                        dmireset;
+
+    jtag_dtm #(
+
+    ) u_jtag_dtm (
+        .jtag_tck_i     (jtag_tck_i),
+        .jtag_trst_ni   (jtag_trst_ni),
+        .dtm_data_o     (dtm_to_dmi_data),
+        .dtm_valid_o    (dtm_to_dmi_valid),
+        .dmi_ready_i    (dmi_to_dtm_ready),
+        .dmi_data_i     (dmi_to_dtm_data),
+        .dmi_valid_i    (dmi_to_dtm_valid),
+        .dtm_ready_o    (dtm_to_dmi_ready),
+        .tap_req_i      (tap_to_dtm_req),
+        .tap_data_i     (tap_to_dtm_data),
+        .dmireset_i     (dmireset),
+        .data_o         (dtm_to_tap_data),
+        .idcode_o       (idcode),
+        .dtmcs_o        (dtmcs)
+    );
+
+    jtag_tap #(
+
+    ) u_jtag_tap (
+        .jtag_tck_i     (jtag_tck_i),
+        .jtag_tdi_i     (jtag_tdi_i),
+        .jtag_tms_i     (jtag_tms_i),
+        .jtag_trst_ni   (jtag_trst_ni),
+        .jtag_tdo_o     (jtag_tdo_o),
+        .tap_req_o      (tap_to_dtm_req),
+        .tap_data_o     (tap_to_dtm_data),
+        .dmireset_o     (dmireset),
+        .dtm_data_i     (dtm_to_tap_data),
+        .idcode_i       (idcode),
+        .dtmcs_i        (dtmcs)
+    );
+
+endmodule

rtl/debug/jtag_top.v

@@ -1,108 +0,0 @@
- /*                                                                      
- Copyright 2020 Blue Liang, liangkangnan@163.com
-                                                                         
- Licensed under the Apache License, Version 2.0 (the "License");         
- you may not use this file except in compliance with the License.        
- You may obtain a copy of the License at                                 
-                                                                         
-     http://www.apache.org/licenses/LICENSE-2.0                          
-                                                                         
- Unless required by applicable law or agreed to in writing, software    
- distributed under the License is distributed on an "AS IS" BASIS,       
- WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- See the License for the specific language governing permissions and     
- limitations under the License.                                          
- */
-
-`include "../core/defines.v"
-
-// JTAG顶层模块
-module jtag_top #(
-    parameter DMI_ADDR_BITS = 6,
-    parameter DMI_DATA_BITS = 32,
-    parameter DMI_OP_BITS = 2)(
-
-    input wire clk,
-    input wire jtag_rst_n,
-
-    input wire jtag_pin_TCK,
-    input wire jtag_pin_TMS,
-    input wire jtag_pin_TDI,
-    output wire jtag_pin_TDO,
-
-    output wire reg_we_o,
-    output wire[4:0] reg_addr_o,
-    output wire[31:0] reg_wdata_o,
-    input wire[31:0] reg_rdata_i,
-    output wire mem_we_o,
-    output wire[31:0] mem_addr_o,
-    output wire[31:0] mem_wdata_o,
-    input wire[31:0] mem_rdata_i,
-    output wire op_req_o,
-
-    output wire halt_req_o,
-    output wire reset_req_o
-
-    );
-
-    parameter DM_RESP_BITS = DMI_ADDR_BITS + DMI_DATA_BITS + DMI_OP_BITS;
-    parameter DTM_REQ_BITS = DMI_ADDR_BITS + DMI_DATA_BITS + DMI_OP_BITS;
-
-    // jtag_driver
-    wire dtm_ack_o;
-    wire dtm_req_valid_o;
-    wire[DTM_REQ_BITS - 1:0] dtm_req_data_o;
-
-    // jtag_dm
-    wire dm_ack_o;
-    wire[DM_RESP_BITS-1:0] dm_resp_data_o;
-    wire dm_resp_valid_o;
-    wire dm_op_req_o;
-    wire dm_halt_req_o;
-    wire dm_reset_req_o;
-
-    jtag_driver #(
-        .DMI_ADDR_BITS(DMI_ADDR_BITS),
-        .DMI_DATA_BITS(DMI_DATA_BITS),
-        .DMI_OP_BITS(DMI_OP_BITS)
-    ) u_jtag_driver(
-        .rst_n(jtag_rst_n),
-        .jtag_TCK(jtag_pin_TCK),
-        .jtag_TDI(jtag_pin_TDI),
-        .jtag_TMS(jtag_pin_TMS),
-        .jtag_TDO(jtag_pin_TDO),
-        .dm_resp_i(dm_resp_valid_o),
-        .dm_resp_data_i(dm_resp_data_o),
-        .dtm_ack_o(dtm_ack_o),
-        .dm_ack_i(dm_ack_o),
-        .dtm_req_valid_o(dtm_req_valid_o),
-        .dtm_req_data_o(dtm_req_data_o)
-    );
-
-    jtag_dm #(
-        .DMI_ADDR_BITS(DMI_ADDR_BITS),
-        .DMI_DATA_BITS(DMI_DATA_BITS),
-        .DMI_OP_BITS(DMI_OP_BITS)
-    ) u_jtag_dm(
-        .clk(clk),
-        .rst_n(jtag_rst_n),
-        .dm_ack_o(dm_ack_o),
-        .dtm_req_valid_i(dtm_req_valid_o),
-        .dtm_req_data_i(dtm_req_data_o),
-        .dtm_ack_i(dtm_ack_o),
-        .dm_resp_data_o(dm_resp_data_o),
-        .dm_resp_valid_o(dm_resp_valid_o),
-        .dm_reg_we_o(reg_we_o),
-        .dm_reg_addr_o(reg_addr_o),
-        .dm_reg_wdata_o(reg_wdata_o),
-        .dm_reg_rdata_i(reg_rdata_i),
-        .dm_mem_we_o(mem_we_o),
-        .dm_mem_addr_o(mem_addr_o),
-        .dm_mem_wdata_o(mem_wdata_o),
-        .dm_mem_rdata_i(mem_rdata_i),
-        .dm_op_req_o(op_req_o),
-        .dm_halt_req_o(halt_req_o),
-        .dm_reset_req_o(reset_req_o)
-    );
-
-endmodule

rtl/debug/uart_debug.v

@@ -1,436 +0,0 @@
- /*                                                                      
- Copyright 2020 Blue Liang, liangkangnan@163.com
-                                                                         
- Licensed under the Apache License, Version 2.0 (the "License");         
- you may not use this file except in compliance with the License.        
- You may obtain a copy of the License at                                 
-                                                                         
-     http://www.apache.org/licenses/LICENSE-2.0                          
-                                                                         
- Unless required by applicable law or agreed to in writing, software    
- distributed under the License is distributed on an "AS IS" BASIS,       
- WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- See the License for the specific language governing permissions and     
- limitations under the License.                                          
- */
-
-
-// clk = 50MHz时对应的波特率分频系数
-`define UART_BAUD_115200        32'h1B8
-
-// 串口寄存器地址
-`define UART_CTRL_REG           32'h30000000
-`define UART_STATUS_REG         32'h30000004
-`define UART_BAUD_REG           32'h30000008
-`define UART_TX_REG             32'h3000000c
-`define UART_RX_REG             32'h30000010
-
-`define UART_TX_BUSY_FLAG       32'h1
-`define UART_RX_OVER_FLAG       32'h2
-
-// 第一个包的大小
-`define UART_FIRST_PACKET_LEN   8'd131
-// 其他包的大小(每次烧写的字节数)
-`define UART_REMAIN_PACKET_LEN  8'd131
-
-`define UART_RESP_ACK           32'h6
-`define UART_RESP_NAK           32'h15
-
-// 烧写起始地址
-`define ROM_START_ADDR          32'h0
-
-
-// 串口更新固件模块
-module uart_debug(
-
-    input wire clk,                // 时钟信号
-    input wire rst,                // 复位信号
-
-    input wire debug_en_i,         // 模块使能信号
-
-    output wire req_o,
-    output reg mem_we_o,
-    output reg[31:0] mem_addr_o,
-    output reg[31:0] mem_wdata_o,
-    input wire[31:0] mem_rdata_i
-
-    );
-
-
-    // 状态
-    localparam S_IDLE                    = 14'h0001;
-    localparam S_INIT_UART_BAUD          = 14'h0002;
-    localparam S_CLEAR_UART_RX_OVER_FLAG = 14'h0004;
-    localparam S_WAIT_BYTE               = 14'h0008;
-    localparam S_WAIT_BYTE2              = 14'h0010;
-    localparam S_GET_BYTE                = 14'h0020;
-    localparam S_REC_FIRST_PACKET        = 14'h0040;
-    localparam S_REC_REMAIN_PACKET       = 14'h0080;
-    localparam S_SEND_ACK                = 14'h0100;
-    localparam S_SEND_NAK                = 14'h0200;
-    localparam S_CRC_START               = 14'h0400;
-    localparam S_CRC_CALC                = 14'h0800;
-    localparam S_CRC_END                 = 14'h1000;
-    localparam S_WRITE_MEM               = 14'h2000;
-
-    reg[13:0] state;
-
-    // 存放串口接收到的数据
-    reg[7:0] rx_data[0:131];
-    reg[7:0] rec_bytes_index;
-    reg[7:0] need_to_rec_bytes;
-    reg[15:0] remain_packet_count;
-    reg[31:0] fw_file_size;
-    reg[31:0] write_mem_addr;
-    reg[31:0] write_mem_data;
-    reg[7:0] write_mem_byte_index0;
-    reg[7:0] write_mem_byte_index1;
-    reg[7:0] write_mem_byte_index2;
-    reg[7:0] write_mem_byte_index3;
-
-    reg[15:0] crc_result;
-    reg[3:0] crc_bit_index;
-    reg[7:0] crc_byte_index;
-
-
-    // 向总线请求信号
-    assign req_o = (rst == 1'b1 && debug_en_i == 1'b1)? 1'b1: 1'b0;
-
-
-    always @ (posedge clk) begin
-        if (rst == 1'b0 || debug_en_i == 1'b0) begin
-            mem_addr_o <= 32'h0;
-            mem_we_o <= 1'b0;
-            mem_wdata_o <= 32'h0;
-            state <= S_IDLE;
-            remain_packet_count <= 16'h0;
-        end else begin
-            case (state)
-                S_IDLE: begin
-                    mem_addr_o <= `UART_CTRL_REG;
-                    mem_wdata_o <= 32'h3;
-                    mem_we_o <= 1'b1;
-                    state <= S_INIT_UART_BAUD;
-                end
-                S_INIT_UART_BAUD: begin
-                    mem_addr_o <= `UART_BAUD_REG;
-                    mem_wdata_o <= `UART_BAUD_115200;
-                    mem_we_o <= 1'b1;
-                    state <= S_REC_FIRST_PACKET;
-                end
-                S_REC_FIRST_PACKET: begin
-                    remain_packet_count <= 16'h0;
-                    mem_addr_o <= 32'h0;
-                    mem_we_o <= 1'b0;
-                    mem_wdata_o <= 32'h0;
-                    state <= S_CLEAR_UART_RX_OVER_FLAG;
-                end
-                S_REC_REMAIN_PACKET: begin
-                    mem_addr_o <= 32'h0;
-                    mem_we_o <= 1'b0;
-                    mem_wdata_o <= 32'h0;
-                    state <= S_CLEAR_UART_RX_OVER_FLAG;
-                end
-                S_CLEAR_UART_RX_OVER_FLAG: begin
-                    mem_addr_o <= `UART_STATUS_REG;
-                    mem_wdata_o <= 32'h0;
-                    mem_we_o <= 1'b1;
-                    state <= S_WAIT_BYTE;
-                end
-                S_WAIT_BYTE: begin
-                    mem_addr_o <= `UART_STATUS_REG;
-                    mem_wdata_o <= 32'h0;
-                    mem_we_o <= 1'b0;
-                    state <= S_WAIT_BYTE2;
-                end
-                S_WAIT_BYTE2: begin
-                    if ((mem_rdata_i & `UART_RX_OVER_FLAG) == `UART_RX_OVER_FLAG) begin
-                        mem_addr_o <= `UART_RX_REG;
-                        mem_wdata_o <= 32'h0;
-                        mem_we_o <= 1'b0;
-                        state <= S_GET_BYTE;
-                    end
-                end
-                S_GET_BYTE: begin
-                    if (rec_bytes_index == (need_to_rec_bytes - 1'b1)) begin
-                        state <= S_CRC_START;
-                    end else begin
-                        state <= S_CLEAR_UART_RX_OVER_FLAG;
-                    end
-                end
-                S_CRC_START: begin
-                    state <= S_CRC_CALC;
-                end
-                S_CRC_CALC: begin
-                    if ((crc_byte_index == need_to_rec_bytes - 2) && crc_bit_index == 4'h8) begin
-                        state <= S_CRC_END;
-                    end
-                end
-                S_CRC_END: begin
-                    if (crc_result == {rx_data[need_to_rec_bytes - 1], rx_data[need_to_rec_bytes - 2]}) begin
-                        if (need_to_rec_bytes == `UART_FIRST_PACKET_LEN && remain_packet_count == 16'h0) begin
-                            remain_packet_count <= {7'h0, fw_file_size[31:7]} + 1'b1;
-                            state <= S_SEND_ACK;
-                        end else begin
-                            remain_packet_count <= remain_packet_count - 1'b1;
-                            state <= S_WRITE_MEM;
-                        end
-                    end else begin
-                        state <= S_SEND_NAK;
-                    end
-                end
-                S_WRITE_MEM: begin
-                    if (write_mem_byte_index0 == (need_to_rec_bytes + 2)) begin
-                        state <= S_SEND_ACK;
-                    end else begin
-                        mem_addr_o <= write_mem_addr;
-                        mem_wdata_o <= write_mem_data;
-                        mem_we_o <= 1'b1;
-                    end
-                end
-                S_SEND_ACK: begin
-                    mem_addr_o <= `UART_TX_REG;
-                    mem_wdata_o <= `UART_RESP_ACK;
-                    mem_we_o <= 1'b1;
-                    if (remain_packet_count > 0) begin
-                        state <= S_REC_REMAIN_PACKET;
-                    end else begin
-                        state <= S_REC_FIRST_PACKET;
-                    end
-                end
-                S_SEND_NAK: begin
-                    mem_addr_o <= `UART_TX_REG;
-                    mem_wdata_o <= `UART_RESP_NAK;
-                    mem_we_o <= 1'b1;
-                    if (remain_packet_count > 0) begin
-                        state <= S_REC_REMAIN_PACKET;
-                    end else begin
-                        state <= S_REC_FIRST_PACKET;
-                    end
-                end
-            endcase
-        end
-    end
-
-    // 数据包的大小
-    always @ (posedge clk) begin
-        if (rst == 1'b0 || debug_en_i == 1'b0) begin
-            need_to_rec_bytes <= 8'h0;
-        end else begin
-            case (state)
-                S_REC_FIRST_PACKET: begin
-                    need_to_rec_bytes <= `UART_FIRST_PACKET_LEN;
-                end
-                S_REC_REMAIN_PACKET: begin
-                    need_to_rec_bytes <= `UART_REMAIN_PACKET_LEN;
-                end
-            endcase
-        end
-    end
-
-    // 读接收到的串口数据
-    always @ (posedge clk) begin
-        if (rst == 1'b0 || debug_en_i == 1'b0) begin
-            rec_bytes_index <= 8'h0;
-        end else begin
-            case (state)
-                S_GET_BYTE: begin
-                    rx_data[rec_bytes_index] <= mem_rdata_i[7:0];
-                    rec_bytes_index <= rec_bytes_index + 1'b1;
-                end
-                S_REC_FIRST_PACKET: begin
-                    rec_bytes_index <= 8'h0;
-                end
-                S_REC_REMAIN_PACKET: begin
-                    rec_bytes_index <= 8'h0;
-                end
-            endcase
-        end
-    end
-
-    // 固件大小
-    always @ (posedge clk) begin
-        if (rst == 1'b0 || debug_en_i == 1'b0) begin
-            fw_file_size <= 32'h0;
-        end else begin
-            case (state)
-                S_CRC_START: begin
-                    fw_file_size <= {rx_data[61], rx_data[62], rx_data[63], rx_data[64]};
-                end
-            endcase
-        end
-    end
-
-    // 烧写固件
-    always @ (posedge clk) begin
-        if (rst == 1'b0 || debug_en_i == 1'b0) begin
-            write_mem_addr <= 32'h0;
-        end else begin
-            case (state)
-                S_REC_FIRST_PACKET: begin
-                    write_mem_addr <= `ROM_START_ADDR;
-                end
-                S_CRC_END: begin
-                    if (write_mem_addr > 0)
-                        write_mem_addr <= write_mem_addr - 4;
-                end
-                S_WRITE_MEM: begin
-                    write_mem_addr <= write_mem_addr + 4;
-                end
-            endcase
-        end
-    end
-
-    always @ (posedge clk) begin
-        if (rst == 1'b0 || debug_en_i == 1'b0) begin
-            write_mem_data <= 32'h0;
-        end else begin
-            case (state)
-                S_REC_FIRST_PACKET: begin
-                    write_mem_data <= 32'h0;
-                end
-                S_CRC_END: begin
-                    write_mem_data <= {rx_data[4], rx_data[3], rx_data[2], rx_data[1]};
-                end
-                S_WRITE_MEM: begin
-                    write_mem_data <= {rx_data[write_mem_byte_index3], rx_data[write_mem_byte_index2], rx_data[write_mem_byte_index1], rx_data[write_mem_byte_index0]};
-                end
-            endcase
-        end
-    end
-
-    always @ (posedge clk) begin
-        if (rst == 1'b0 || debug_en_i == 1'b0) begin
-            write_mem_byte_index0 <= 8'h0;
-        end else begin
-            case (state)
-                S_REC_FIRST_PACKET: begin
-                    write_mem_byte_index0 <= 8'h0;
-                end
-                S_CRC_END: begin
-                    write_mem_byte_index0 <= 8'h5;
-                end
-                S_WRITE_MEM: begin
-                    write_mem_byte_index0 <= write_mem_byte_index0 + 4;
-                end
-            endcase
-        end
-    end
-
-    always @ (posedge clk) begin
-        if (rst == 1'b0 || debug_en_i == 1'b0) begin
-            write_mem_byte_index1 <= 8'h0;
-        end else begin
-            case (state)
-                S_REC_FIRST_PACKET: begin
-                    write_mem_byte_index1 <= 8'h0;
-                end
-                S_CRC_END: begin
-                    write_mem_byte_index1 <= 8'h6;
-                end
-                S_WRITE_MEM: begin
-                    write_mem_byte_index1 <= write_mem_byte_index1 + 4;
-                end
-            endcase
-        end
-    end
-
-    always @ (posedge clk) begin
-        if (rst == 1'b0 || debug_en_i == 1'b0) begin
-            write_mem_byte_index2 <= 8'h0;
-        end else begin
-            case (state)
-                S_REC_FIRST_PACKET: begin
-                    write_mem_byte_index2 <= 8'h0;
-                end
-                S_CRC_END: begin
-                    write_mem_byte_index2 <= 8'h7;
-                end
-                S_WRITE_MEM: begin
-                    write_mem_byte_index2 <= write_mem_byte_index2 + 4;
-                end
-            endcase
-        end
-    end
-
-    always @ (posedge clk) begin
-        if (rst == 1'b0 || debug_en_i == 1'b0) begin
-            write_mem_byte_index3 <= 8'h0;
-        end else begin
-            case (state)
-                S_REC_FIRST_PACKET: begin
-                    write_mem_byte_index3 <= 8'h0;
-                end
-                S_CRC_END: begin
-                    write_mem_byte_index3 <= 8'h8;
-                end
-                S_WRITE_MEM: begin
-                    write_mem_byte_index3 <= write_mem_byte_index3 + 4;
-                end
-            endcase
-        end
-    end
-
-    // CRC计算
-    always @ (posedge clk) begin
-        if (rst == 1'b0 || debug_en_i == 1'b0) begin
-            crc_result <= 16'h0;
-        end else begin
-            case (state)
-                S_CRC_START: begin
-                    crc_result <= 16'hffff;
-                end
-                S_CRC_CALC: begin
-                    if (crc_bit_index == 4'h0) begin
-                        crc_result <= crc_result ^ rx_data[crc_byte_index];
-                    end else begin
-                        if (crc_bit_index < 4'h9) begin
-                            if (crc_result[0] == 1'b1) begin
-                                crc_result <= {1'b0, crc_result[15:1]} ^ 16'ha001;
-                            end else begin
-                                crc_result <= {1'b0, crc_result[15:1]};
-                            end
-                        end
-                    end
-                end
-            endcase
-        end
-    end
-
-    always @ (posedge clk) begin
-        if (rst == 1'b0 || debug_en_i == 1'b0) begin
-            crc_bit_index <= 4'h0;
-        end else begin
-            case (state)
-                S_CRC_START: begin
-                    crc_bit_index <= 4'h0;
-                end
-                S_CRC_CALC: begin
-                    if (crc_bit_index < 4'h9) begin
-                        crc_bit_index <= crc_bit_index + 1'b1;
-                    end else begin
-                        crc_bit_index <= 4'h0;
-                    end
-                end
-            endcase
-        end
-    end
-
-    always @ (posedge clk) begin
-        if (rst == 1'b0 || debug_en_i == 1'b0) begin
-            crc_byte_index <= 8'h0;
-        end else begin
-            case (state)
-                S_CRC_START: begin
-                    crc_byte_index <= 8'h1;
-                end
-                S_CRC_CALC: begin
-                    if (crc_bit_index == 4'h0) begin
-                        crc_byte_index <= crc_byte_index + 1'b1;
-                    end
-                end
-            endcase
-        end
-    end
-
-endmodule

rtl/perips/bootrom/bootrom_top.sv

@@ -0,0 +1,75 @@
+ /*                                                                      
+ Copyright 2023 Blue Liang, liangkangnan@163.com
+                                                                         
+ Licensed under the Apache License, Version 2.0 (the "License");         
+ you may not use this file except in compliance with the License.        
+ You may obtain a copy of the License at                                 
+                                                                         
+     http://www.apache.org/licenses/LICENSE-2.0                          
+                                                                         
+ Unless required by applicable law or agreed to in writing, software    
+ distributed under the License is distributed on an "AS IS" BASIS,       
+ WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ See the License for the specific language governing permissions and     
+ limitations under the License.                                          
+ */
+
+
+module bootrom_top(
+    input  wire        clk_i,
+    input  wire        rst_ni,
+
+    input  wire        req_i,
+    input  wire        we_i,
+    input  wire [ 3:0] be_i,
+    input  wire [31:0] addr_i,
+    input  wire [31:0] data_i,
+    output wire        gnt_o,
+    output wire        rvalid_o,
+	output wire [31:0] data_o
+    );
+
+    localparam RomSize = 5;
+
+    wire [RomSize-1:0][31:0] mem;
+
+    assign mem = {
+        32'h0000006f,
+        32'h000500e7,
+        32'h02000537,
+        32'h0005a023,
+        32'h02c005b7
+    };
+
+    reg [5:0] addr_q;
+
+    always @(posedge clk_i) begin
+        if (req_i) begin
+            addr_q <= addr_i[7:2];
+        end
+    end
+
+    reg rvalid_q;
+
+    always @(posedge clk_i or negedge rst_ni) begin
+        if (!rst_ni) begin
+            rvalid_q <= 1'b0;
+        end else begin
+            rvalid_q <= req_i;
+        end
+    end
+
+    reg[31:0] rdata;
+
+    always @(*) begin
+        rdata = 32'h0;
+        if (addr_q < 6'd38) begin
+            rdata = mem[addr_q];
+        end
+    end
+
+    assign gnt_o    = req_i;
+    assign data_o   = rdata;
+    assign rvalid_o = rvalid_q;
+
+endmodule

rtl/perips/gpio.v

@@ -1,98 +0,0 @@
- /*                                                                      
- Copyright 2020 Blue Liang, liangkangnan@163.com
-                                                                         
- Licensed under the Apache License, Version 2.0 (the "License");         
- you may not use this file except in compliance with the License.        
- You may obtain a copy of the License at                                 
-                                                                         
-     http://www.apache.org/licenses/LICENSE-2.0                          
-                                                                         
- Unless required by applicable law or agreed to in writing, software    
- distributed under the License is distributed on an "AS IS" BASIS,       
- WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- See the License for the specific language governing permissions and     
- limitations under the License.                                          
- */
-
-
-// GPIO模块
-module gpio(
-
-    input wire clk,
-	input wire rst,
-
-    input wire we_i,
-    input wire[31:0] addr_i,
-    input wire[31:0] data_i,
-
-    output reg[31:0] data_o,
-
-    input wire[1:0] io_pin_i,
-    output wire[31:0] reg_ctrl,
-    output wire[31:0] reg_data
-
-    );
-
-
-    // GPIO控制寄存器
-    localparam GPIO_CTRL = 4'h0;
-    // GPIO数据寄存器
-    localparam GPIO_DATA = 4'h4;
-
-    // 每2位控制1个IO的模式，最多支持16个IO
-    // 0: 高阻，1：输出，2：输入
-    reg[31:0] gpio_ctrl;
-    // 输入输出数据
-    reg[31:0] gpio_data;
-
-
-    assign reg_ctrl = gpio_ctrl;
-    assign reg_data = gpio_data;
-
-
-    // 写寄存器
-    always @ (posedge clk) begin
-        if (rst == 1'b0) begin
-            gpio_data <= 32'h0;
-            gpio_ctrl <= 32'h0;
-        end else begin
-            if (we_i == 1'b1) begin
-                case (addr_i[3:0])
-                    GPIO_CTRL: begin
-                        gpio_ctrl <= data_i;
-                    end
-                    GPIO_DATA: begin
-                        gpio_data <= data_i;
-                    end
-                endcase
-            end else begin
-                if (gpio_ctrl[1:0] == 2'b10) begin
-                    gpio_data[0] <= io_pin_i[0];
-                end
-                if (gpio_ctrl[3:2] == 2'b10) begin
-                    gpio_data[1] <= io_pin_i[1];
-                end
-            end
-        end
-    end
-
-    // 读寄存器
-    always @ (*) begin
-        if (rst == 1'b0) begin
-            data_o = 32'h0;
-        end else begin
-            case (addr_i[3:0])
-                GPIO_CTRL: begin
-                    data_o = gpio_ctrl;
-                end
-                GPIO_DATA: begin
-                    data_o = gpio_data;
-                end
-                default: begin
-                    data_o = 32'h0;
-                end
-            endcase
-        end
-    end
-
-endmodule

rtl/perips/gpio/gpio.hjson

@@ -0,0 +1,64 @@
+// Copyright lowRISC contributors.
+// Licensed under the Apache License, Version 2.0, see LICENSE for details.
+// SPDX-License-Identifier: Apache-2.0
+{ name: "gpio",
+  clocking: [{clock: "clk_i", reset: "rst_ni"}],
+  bus_interfaces: [
+    { protocol: "tlul", direction: "device" }
+  ],
+  regwidth: "32",
+  registers: [
+    { name: "IO_MODE",
+      desc: "gpio input/output mode register",
+      swaccess: "rw",
+      hwaccess: "hro",
+      fields: [
+        { bits: "31:0",
+          desc: "gpio input or output mode, 2 bits for each gpio",
+        }
+      ]
+    }
+    { name: "INT_MODE",
+      desc: "gpio interrupt mode register",
+      swaccess: "rw",
+      hwaccess: "hro",
+      fields: [
+        { bits: "31:0",
+          desc: "gpio interrupt mode, 2 bits for each gpio",
+        }
+      ]
+    }
+    { name: "INT_PENDING",
+      desc: "gpio interrupt pending register",
+      swaccess: "rw",
+      hwaccess: "hrw",
+      fields: [
+        { bits: "15:0",
+          name: "GPIO_INT_PENDING",
+          swaccess: "rw1c",
+          desc: "gpio interrupt pending, 1 bits for each gpio",
+        }
+      ]
+    }
+    { name: "DATA",
+      desc: "gpio data register",
+      swaccess: "rw",
+      hwaccess: "hrw",
+      fields: [
+        { bits: "15:0",
+          desc: "gpio input or output data, 1 bits for each gpio",
+        }
+      ]
+    }
+    { name: "FILTER",
+      desc: "gpio input filter enable register",
+      swaccess: "rw",
+      hwaccess: "hro",
+      fields: [
+        { bits: "15:0",
+          desc: "gpio input filter enable, 1 bits for each gpio",
+        }
+      ]
+    }
+  ]
+}

rtl/perips/gpio/gpio_core.sv

@@ -0,0 +1,176 @@
+ /*                                                                      
+ Copyright 2021 Blue Liang, liangkangnan@163.com
+                                                                         
+ Licensed under the Apache License, Version 2.0 (the "License");         
+ you may not use this file except in compliance with the License.        
+ You may obtain a copy of the License at                                 
+                                                                         
+     http://www.apache.org/licenses/LICENSE-2.0                          
+                                                                         
+ Unless required by applicable law or agreed to in writing, software    
+ distributed under the License is distributed on an "AS IS" BASIS,       
+ WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ See the License for the specific language governing permissions and     
+ limitations under the License.                                          
+ */
+
+// 目前最多支持16个GPIO
+module gpio_core #(
+    parameter int GPIO_NUM = 2
+    )(
+    input  logic                clk_i,
+    input  logic                rst_ni,
+
+    output logic [GPIO_NUM-1:0] gpio_oe_o,
+    output logic [GPIO_NUM-1:0] gpio_data_o,
+    input  logic [GPIO_NUM-1:0] gpio_data_i,
+    output logic                irq_gpio0_o,
+    output logic                irq_gpio1_o,
+    output logic                irq_gpio2_4_o,
+    output logic                irq_gpio5_7_o,
+    output logic                irq_gpio8_o,
+    output logic                irq_gpio9_o,
+    output logic                irq_gpio10_12_o,
+    output logic                irq_gpio13_15_o,
+
+    input  logic                reg_we_i,
+    input  logic                reg_re_i,
+    input  logic [31:0]         reg_wdata_i,
+    input  logic [ 3:0]         reg_be_i,
+    input  logic [31:0]         reg_addr_i,
+    output logic [31:0]         reg_rdata_o
+    );
+
+    localparam logic [1:0] INTR_MODE_NONE        = 2'd0;
+    localparam logic [1:0] INTR_MODE_RAISE_EDGE  = 2'd1;
+    localparam logic [1:0] INTR_MODE_FALL_EDGE   = 2'd2;
+    localparam logic [1:0] INTR_MODE_DOUBLE_EDGE = 2'd3;
+
+    localparam logic [1:0] GPIO_MODE_NONE   = 2'd0;
+    localparam logic [1:0] GPIO_MODE_INPUT  = 2'd1;
+    localparam logic [1:0] GPIO_MODE_OUTPUT = 2'd2;
+
+    import gpio_reg_pkg::*;
+
+    gpio_reg_pkg::gpio_reg2hw_t reg2hw;
+    gpio_reg_pkg::gpio_hw2reg_t hw2reg;
+
+    logic [GPIO_NUM-1:0] gpio_oe;
+    logic [GPIO_NUM-1:0] gpio_ie;
+    logic [GPIO_NUM-1:0] gpio_data;
+    logic [GPIO_NUM-1:0] gpio_filter_enable;
+    logic [GPIO_NUM-1:0] gpio_filter_data;
+    logic [GPIO_NUM-1:0] gpio_raise_detect;
+    logic [GPIO_NUM-1:0] gpio_fall_detect;
+    logic [GPIO_NUM-1:0] gpio_intr_trigge;
+
+    // 输入滤波使能
+    for (genvar i = 0; i < GPIO_NUM; i = i + 1) begin : g_gpio_filter_enable
+        assign gpio_filter_enable[i] = reg2hw.filter.q[i];
+    end
+
+    // 输出使能
+    for (genvar i = 0; i < GPIO_NUM; i = i + 1) begin : g_gpio_oe
+        assign gpio_oe[i] = reg2hw.io_mode.q[i*2+1:i*2] == GPIO_MODE_OUTPUT;
+    end
+
+    assign gpio_oe_o = gpio_oe;
+
+    // 输出数据
+    for (genvar i = 0; i < GPIO_NUM; i = i + 1) begin : g_gpio_data
+        assign gpio_data[i] = reg2hw.data.q[i];
+    end
+
+    assign gpio_data_o = gpio_data;
+
+    // 输入使能
+    for (genvar i = 0; i < GPIO_NUM; i = i + 1) begin : g_gpio_ie
+        assign gpio_ie[i] = reg2hw.io_mode.q[i*2+1:i*2] == GPIO_MODE_INPUT;
+    end
+
+    // 硬件写data数据
+    for (genvar i = 0; i < GPIO_NUM; i = i + 1) begin : g_h2r_data
+        assign hw2reg.data.d[i] = gpio_ie[i] ? gpio_filter_data[i] : reg2hw.data.q[i];
+    end
+    // 硬件写data使能
+    assign hw2reg.data.de = |gpio_ie;
+
+    // 中断有效
+    for (genvar i = 0; i < GPIO_NUM; i = i + 1) begin : g_gpio_intr_trigge
+        assign gpio_intr_trigge[i] = ((reg2hw.int_mode.q[i*2+1:i*2] == INTR_MODE_RAISE_EDGE)  & gpio_raise_detect[i]) |
+                                     ((reg2hw.int_mode.q[i*2+1:i*2] == INTR_MODE_FALL_EDGE)   & gpio_fall_detect[i]) |
+                                     ((reg2hw.int_mode.q[i*2+1:i*2] == INTR_MODE_DOUBLE_EDGE) & (gpio_raise_detect[i] | gpio_fall_detect[i]));
+    end
+
+    // 硬件写中断pending数据
+    for (genvar i = 0; i < GPIO_NUM; i = i + 1) begin : g_gpio_intr_pending
+        assign hw2reg.int_pending.d[i] = gpio_intr_trigge[i] ? 1'b1 : reg2hw.int_pending.q[i];
+    end
+    // 硬件写中断pending使能
+    assign hw2reg.int_pending.de = |gpio_intr_trigge;
+
+    // 中断输出信号
+    if (GPIO_NUM >= 1) begin : g_num_ge_1
+        assign irq_gpio0_o   = reg2hw.int_pending.q[0];
+    end
+    if (GPIO_NUM >= 2) begin : g_num_ge_2
+        assign irq_gpio1_o   = reg2hw.int_pending.q[1];
+    end
+    if (GPIO_NUM >= 5) begin : g_num_ge_5
+        assign irq_gpio2_4_o = reg2hw.int_pending.q[2] | reg2hw.int_pending.q[3] | reg2hw.int_pending.q[4];
+    end
+    if (GPIO_NUM >= 8) begin : g_num_ge_8
+        assign irq_gpio5_7_o = reg2hw.int_pending.q[5] | reg2hw.int_pending.q[6] | reg2hw.int_pending.q[7];
+    end
+    if (GPIO_NUM >= 9) begin : g_num_ge_9
+        assign irq_gpio8_o = reg2hw.int_pending.q[8];
+    end
+    if (GPIO_NUM >= 10) begin : g_num_ge_10
+        assign irq_gpio9_o = reg2hw.int_pending.q[9];
+    end
+    if (GPIO_NUM >= 13) begin : g_num_ge_13
+        assign irq_gpio10_12_o = reg2hw.int_pending.q[10] | reg2hw.int_pending.q[11] | reg2hw.int_pending.q[12];
+    end
+    if (GPIO_NUM >= 16) begin : g_num_ge_16
+        assign irq_gpio13_15_o = reg2hw.int_pending.q[13] | reg2hw.int_pending.q[14] | reg2hw.int_pending.q[15];
+    end
+
+    // 沿检测
+    for (genvar i = 0; i < GPIO_NUM; i = i + 1) begin : g_edge_detect
+        edge_detect u_edge_detect(
+            .clk_i  (clk_i),
+            .rst_ni (rst_ni),
+            .sig_i  (gpio_filter_data[i]),
+            .sig_o  (),
+            .re_o   (gpio_raise_detect[i]),
+            .fe_o   (gpio_fall_detect[i])
+        );
+    end
+
+    // 输入信号滤波
+    for (genvar i = 0; i < GPIO_NUM; i = i + 1) begin : g_gpio_filter
+        prim_filter #(
+            .Cycles(8)
+        ) gpio_filter (
+            .clk_i      (clk_i),
+            .rst_ni     (rst_ni),
+            .enable_i   (gpio_filter_enable[i]),
+            .filter_i   (gpio_data_i[i]),
+            .filter_o   (gpio_filter_data[i])
+        );
+    end
+
+    gpio_reg_top u_gpio_reg_top (
+        .clk_i      (clk_i),
+        .rst_ni     (rst_ni),
+        .reg2hw     (reg2hw),
+        .hw2reg     (hw2reg),
+        .reg_we     (reg_we_i),
+        .reg_re     (reg_re_i),
+        .reg_wdata  (reg_wdata_i),
+        .reg_be     (reg_be_i),
+        .reg_addr   (reg_addr_i),
+        .reg_rdata  (reg_rdata_o)
+    );
+
+endmodule

rtl/perips/gpio/gpio_reg_pkg.sv

@@ -0,0 +1,87 @@
+// Copyright lowRISC contributors.
+// Licensed under the Apache License, Version 2.0, see LICENSE for details.
+// SPDX-License-Identifier: Apache-2.0
+//
+// Register Package auto-generated by `reggen` containing data structure
+
+package gpio_reg_pkg;
+
+  // Address widths within the block
+  parameter int BlockAw = 5;
+
+  ////////////////////////////
+  // Typedefs for registers //
+  ////////////////////////////
+
+  typedef struct packed {
+    logic [31:0] q;
+  } gpio_reg2hw_io_mode_reg_t;
+
+  typedef struct packed {
+    logic [31:0] q;
+  } gpio_reg2hw_int_mode_reg_t;
+
+  typedef struct packed {
+    logic [15:0] q;
+  } gpio_reg2hw_int_pending_reg_t;
+
+  typedef struct packed {
+    logic [15:0] q;
+  } gpio_reg2hw_data_reg_t;
+
+  typedef struct packed {
+    logic [15:0] q;
+  } gpio_reg2hw_filter_reg_t;
+
+  typedef struct packed {
+    logic [15:0] d;
+    logic        de;
+  } gpio_hw2reg_int_pending_reg_t;
+
+  typedef struct packed {
+    logic [15:0] d;
+    logic        de;
+  } gpio_hw2reg_data_reg_t;
+
+  // Register -> HW type
+  typedef struct packed {
+    gpio_reg2hw_io_mode_reg_t io_mode; // [111:80]
+    gpio_reg2hw_int_mode_reg_t int_mode; // [79:48]
+    gpio_reg2hw_int_pending_reg_t int_pending; // [47:32]
+    gpio_reg2hw_data_reg_t data; // [31:16]
+    gpio_reg2hw_filter_reg_t filter; // [15:0]
+  } gpio_reg2hw_t;
+
+  // HW -> register type
+  typedef struct packed {
+    gpio_hw2reg_int_pending_reg_t int_pending; // [33:17]
+    gpio_hw2reg_data_reg_t data; // [16:0]
+  } gpio_hw2reg_t;
+
+  // Register offsets
+  parameter logic [BlockAw-1:0] GPIO_IO_MODE_OFFSET = 5'h0;
+  parameter logic [BlockAw-1:0] GPIO_INT_MODE_OFFSET = 5'h4;
+  parameter logic [BlockAw-1:0] GPIO_INT_PENDING_OFFSET = 5'h8;
+  parameter logic [BlockAw-1:0] GPIO_DATA_OFFSET = 5'hc;
+  parameter logic [BlockAw-1:0] GPIO_FILTER_OFFSET = 5'h10;
+
+  // Register index
+  typedef enum int {
+    GPIO_IO_MODE,
+    GPIO_INT_MODE,
+    GPIO_INT_PENDING,
+    GPIO_DATA,
+    GPIO_FILTER
+  } gpio_id_e;
+
+  // Register width information to check illegal writes
+  parameter logic [3:0] GPIO_PERMIT [5] = '{
+    4'b1111, // index[0] GPIO_IO_MODE
+    4'b1111, // index[1] GPIO_INT_MODE
+    4'b0011, // index[2] GPIO_INT_PENDING
+    4'b0011, // index[3] GPIO_DATA
+    4'b0011  // index[4] GPIO_FILTER
+  };
+
+endpackage
+

rtl/perips/gpio/gpio_reg_top.sv

@@ -0,0 +1,270 @@
+// Copyright lowRISC contributors.
+// Licensed under the Apache License, Version 2.0, see LICENSE for details.
+// SPDX-License-Identifier: Apache-2.0
+//
+// Register Top module auto-generated by `reggen`
+
+
+module gpio_reg_top (
+  input  logic        clk_i,
+  input  logic        rst_ni,
+
+  // To HW
+  output gpio_reg_pkg::gpio_reg2hw_t reg2hw, // Write
+  input  gpio_reg_pkg::gpio_hw2reg_t hw2reg, // Read
+
+  input  logic        reg_we,
+  input  logic        reg_re,
+  input  logic [31:0] reg_wdata,
+  input  logic [ 3:0] reg_be,
+  input  logic [31:0] reg_addr,
+  output logic [31:0] reg_rdata
+);
+
+  import gpio_reg_pkg::* ;
+
+  localparam int AW = 5;
+  localparam int DW = 32;
+  localparam int DBW = DW/8;    // Byte Width
+
+  logic reg_error;
+  logic addrmiss, wr_err;
+
+  logic [DW-1:0] reg_rdata_next;
+
+  assign reg_rdata = reg_rdata_next;
+  assign reg_error = wr_err;
+
+  // Define SW related signals
+  // Format: <reg>_<field>_{wd|we|qs}
+  //        or <reg>_{wd|we|qs} if field == 1 or 0
+  logic io_mode_we;
+  logic [31:0] io_mode_qs;
+  logic [31:0] io_mode_wd;
+  logic int_mode_we;
+  logic [31:0] int_mode_qs;
+  logic [31:0] int_mode_wd;
+  logic int_pending_we;
+  logic [15:0] int_pending_qs;
+  logic [15:0] int_pending_wd;
+  logic data_we;
+  logic [15:0] data_qs;
+  logic [15:0] data_wd;
+  logic filter_we;
+  logic [15:0] filter_qs;
+  logic [15:0] filter_wd;
+
+  // Register instances
+  // R[io_mode]: V(False)
+
+  prim_subreg #(
+    .DW      (32),
+    .SWACCESS("RW"),
+    .RESVAL  (32'h0)
+  ) u_io_mode (
+    .clk_i   (clk_i),
+    .rst_ni  (rst_ni),
+
+    // from register interface
+    .we     (io_mode_we),
+    .wd     (io_mode_wd),
+
+    // from internal hardware
+    .de     (1'b0),
+    .d      ('0),
+
+    // to internal hardware
+    .qe     (),
+    .q      (reg2hw.io_mode.q),
+
+    // to register interface (read)
+    .qs     (io_mode_qs)
+  );
+
+
+  // R[int_mode]: V(False)
+
+  prim_subreg #(
+    .DW      (32),
+    .SWACCESS("RW"),
+    .RESVAL  (32'h0)
+  ) u_int_mode (
+    .clk_i   (clk_i),
+    .rst_ni  (rst_ni),
+
+    // from register interface
+    .we     (int_mode_we),
+    .wd     (int_mode_wd),
+
+    // from internal hardware
+    .de     (1'b0),
+    .d      ('0),
+
+    // to internal hardware
+    .qe     (),
+    .q      (reg2hw.int_mode.q),
+
+    // to register interface (read)
+    .qs     (int_mode_qs)
+  );
+
+
+  // R[int_pending]: V(False)
+
+  prim_subreg #(
+    .DW      (16),
+    .SWACCESS("W1C"),
+    .RESVAL  (16'h0)
+  ) u_int_pending (
+    .clk_i   (clk_i),
+    .rst_ni  (rst_ni),
+
+    // from register interface
+    .we     (int_pending_we),
+    .wd     (int_pending_wd),
+
+    // from internal hardware
+    .de     (hw2reg.int_pending.de),
+    .d      (hw2reg.int_pending.d),
+
+    // to internal hardware
+    .qe     (),
+    .q      (reg2hw.int_pending.q),
+
+    // to register interface (read)
+    .qs     (int_pending_qs)
+  );
+
+
+  // R[data]: V(False)
+
+  prim_subreg #(
+    .DW      (16),
+    .SWACCESS("RW"),
+    .RESVAL  (16'h0)
+  ) u_data (
+    .clk_i   (clk_i),
+    .rst_ni  (rst_ni),
+
+    // from register interface
+    .we     (data_we),
+    .wd     (data_wd),
+
+    // from internal hardware
+    .de     (hw2reg.data.de),
+    .d      (hw2reg.data.d),
+
+    // to internal hardware
+    .qe     (),
+    .q      (reg2hw.data.q),
+
+    // to register interface (read)
+    .qs     (data_qs)
+  );
+
+
+  // R[filter]: V(False)
+
+  prim_subreg #(
+    .DW      (16),
+    .SWACCESS("RW"),
+    .RESVAL  (16'h0)
+  ) u_filter (
+    .clk_i   (clk_i),
+    .rst_ni  (rst_ni),
+
+    // from register interface
+    .we     (filter_we),
+    .wd     (filter_wd),
+
+    // from internal hardware
+    .de     (1'b0),
+    .d      ('0),
+
+    // to internal hardware
+    .qe     (),
+    .q      (reg2hw.filter.q),
+
+    // to register interface (read)
+    .qs     (filter_qs)
+  );
+
+
+  logic [4:0] addr_hit;
+  always_comb begin
+    addr_hit = '0;
+    addr_hit[0] = (reg_addr == GPIO_IO_MODE_OFFSET);
+    addr_hit[1] = (reg_addr == GPIO_INT_MODE_OFFSET);
+    addr_hit[2] = (reg_addr == GPIO_INT_PENDING_OFFSET);
+    addr_hit[3] = (reg_addr == GPIO_DATA_OFFSET);
+    addr_hit[4] = (reg_addr == GPIO_FILTER_OFFSET);
+  end
+
+  assign addrmiss = (reg_re || reg_we) ? ~|addr_hit : 1'b0 ;
+
+  // Check sub-word write is permitted
+  always_comb begin
+    wr_err = (reg_we &
+              ((addr_hit[0] & (|(GPIO_PERMIT[0] & ~reg_be))) |
+               (addr_hit[1] & (|(GPIO_PERMIT[1] & ~reg_be))) |
+               (addr_hit[2] & (|(GPIO_PERMIT[2] & ~reg_be))) |
+               (addr_hit[3] & (|(GPIO_PERMIT[3] & ~reg_be))) |
+               (addr_hit[4] & (|(GPIO_PERMIT[4] & ~reg_be)))));
+  end
+
+  assign io_mode_we = addr_hit[0] & reg_we & !reg_error;
+
+  assign io_mode_wd = reg_wdata[31:0];
+  assign int_mode_we = addr_hit[1] & reg_we & !reg_error;
+
+  assign int_mode_wd = reg_wdata[31:0];
+  assign int_pending_we = addr_hit[2] & reg_we & !reg_error;
+
+  assign int_pending_wd = reg_wdata[15:0];
+  assign data_we = addr_hit[3] & reg_we & !reg_error;
+
+  assign data_wd = reg_wdata[15:0];
+  assign filter_we = addr_hit[4] & reg_we & !reg_error;
+
+  assign filter_wd = reg_wdata[15:0];
+
+  // Read data return
+  always_comb begin
+    reg_rdata_next = '0;
+    unique case (1'b1)
+      addr_hit[0]: begin
+        reg_rdata_next[31:0] = io_mode_qs;
+      end
+
+      addr_hit[1]: begin
+        reg_rdata_next[31:0] = int_mode_qs;
+      end
+
+      addr_hit[2]: begin
+        reg_rdata_next[15:0] = int_pending_qs;
+      end
+
+      addr_hit[3]: begin
+        reg_rdata_next[15:0] = data_qs;
+      end
+
+      addr_hit[4]: begin
+        reg_rdata_next[15:0] = filter_qs;
+      end
+
+      default: begin
+        reg_rdata_next = '1;
+      end
+    endcase
+  end
+
+  // Unused signal tieoff
+
+  // wdata / byte enable are not always fully used
+  // add a blanket unused statement to handle lint waivers
+  logic unused_wdata;
+  logic unused_be;
+  assign unused_wdata = ^reg_wdata;
+  assign unused_be = ^reg_be;
+
+endmodule

rtl/perips/gpio/gpio_top.sv

@@ -0,0 +1,94 @@
+ /*                                                                      
+ Copyright 2021 Blue Liang, liangkangnan@163.com
+                                                                         
+ Licensed under the Apache License, Version 2.0 (the "License");         
+ you may not use this file except in compliance with the License.        
+ You may obtain a copy of the License at                                 
+                                                                         
+     http://www.apache.org/licenses/LICENSE-2.0                          
+                                                                         
+ Unless required by applicable law or agreed to in writing, software    
+ distributed under the License is distributed on an "AS IS" BASIS,       
+ WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ See the License for the specific language governing permissions and     
+ limitations under the License.                                          
+ */
+
+module gpio_top #(
+    parameter int GPIO_NUM = 2
+    )(
+    input  logic                clk_i,
+    input  logic                rst_ni,
+
+    output logic [GPIO_NUM-1:0] gpio_oe_o,
+    output logic [GPIO_NUM-1:0] gpio_data_o,
+    input  logic [GPIO_NUM-1:0] gpio_data_i,
+    output logic                irq_gpio0_o,
+    output logic                irq_gpio1_o,
+    output logic                irq_gpio2_4_o,
+    output logic                irq_gpio5_7_o,
+    output logic                irq_gpio8_o,
+    output logic                irq_gpio9_o,
+    output logic                irq_gpio10_12_o,
+    output logic                irq_gpio13_15_o,
+
+    // OBI总线接口信号
+    input  logic                req_i,
+    input  logic                we_i,
+    input  logic [ 3:0]         be_i,
+    input  logic [31:0]         addr_i,
+    input  logic [31:0]         data_i,
+    output logic                gnt_o,
+    output logic                rvalid_o,
+    output logic [31:0]         data_o
+    );
+
+    logic re;
+    logic we;
+    logic [31:0] addr;
+    logic [31:0] reg_rdata;
+
+    assign gnt_o = req_i;
+
+    // 读信号
+    assign re = req_i & (!we_i);
+    // 写信号
+    assign we = req_i & we_i;
+    // 去掉基地址
+    assign addr = {16'h0, addr_i[15:0]};
+
+    always_ff @(posedge clk_i or negedge rst_ni) begin
+        if (!rst_ni) begin
+            rvalid_o <= '0;
+            data_o <= '0;
+        end else begin
+            rvalid_o <= req_i;
+            data_o <= reg_rdata;
+        end
+    end
+
+    gpio_core #(
+        .GPIO_NUM(GPIO_NUM)
+    ) u_gpio_core (
+        .clk_i      (clk_i),
+        .rst_ni     (rst_ni),
+        .gpio_oe_o  (gpio_oe_o),
+        .gpio_data_o(gpio_data_o),
+        .gpio_data_i(gpio_data_i),
+        .irq_gpio0_o(irq_gpio0_o),
+        .irq_gpio1_o(irq_gpio1_o),
+        .irq_gpio2_4_o(irq_gpio2_4_o),
+        .irq_gpio5_7_o(irq_gpio5_7_o),
+        .irq_gpio8_o(irq_gpio8_o),
+        .irq_gpio9_o(irq_gpio9_o),
+        .irq_gpio10_12_o(irq_gpio10_12_o),
+        .irq_gpio13_15_o(irq_gpio13_15_o),
+        .reg_we_i   (we),
+        .reg_re_i   (re),
+        .reg_wdata_i(data_i),
+        .reg_be_i   (be_i),
+        .reg_addr_i (addr),
+        .reg_rdata_o(reg_rdata)
+    );
+
+endmodule

rtl/perips/i2c/i2c.hjson

@@ -0,0 +1,138 @@
+// Copyright lowRISC contributors.
+// Licensed under the Apache License, Version 2.0, see LICENSE for details.
+// SPDX-License-Identifier: Apache-2.0
+{ name: "i2c",
+  clocking: [{clock: "clk_i", reset: "rst_ni"}],
+  bus_interfaces: [
+    { protocol: "tlul", direction: "device" }
+  ],
+  regwidth: "32",
+  registers: [
+    { name: "CTRL",
+      desc: "I2C control register",
+      swaccess: "rw",
+      hwaccess: "hrw",
+      hwqe: "true",
+      fields: [
+        { bits: "0",
+          name: "START",
+          desc: "I2C start",
+        }
+        { bits: "1",
+          name: "INT_EN",
+          desc: "I2C interrupt enable",
+        }
+        { bits: "2",
+          name: "INT_PENDING",
+          swaccess: "rw1c",
+          desc: "I2C interrupt pending",
+        }
+        { bits: "3",
+          name: "MODE",
+          desc: "I2C mode, 0: master, 1: slave",
+        }
+        { bits: "4",
+          name: "WRITE",
+          desc: "0: write, 1: read",
+        }
+        { bits: "5",
+          name: "ERROR",
+          swaccess: "ro",
+          desc: "0: no error, 1: error",
+        }
+        { bits: "6",
+          name: "SLAVE_WR",
+          swaccess: "ro",
+          desc: "0: write, 1: read",
+        }
+        { bits: "7",
+          name: "SLAVE_RDY",
+          desc: "0: not ready, 1: ready",
+        }
+        { bits: "15:8",
+          name: "SLAVE_ADDR",
+          desc: "I2C slave address",
+        }
+        { bits: "31:16",
+          name: "CLK_DIV",
+          desc: "I2C clock divider count",
+        }
+      ]
+    }
+    { name: "MASTER_DATA",
+      desc: "I2C master transfer data register",
+      swaccess: "rw",
+      hwaccess: "hrw",
+      fields: [
+        { bits: "7:0",
+          name: "ADDRESS",
+          desc: "I2C slave address",
+        }
+        { bits: "15:8",
+          name: "REGREG",
+          desc: "I2C write or read reg",
+        }
+        { bits: "23:16",
+          name: "DATA",
+          desc: "I2C write or read data",
+        }
+      ]
+    }
+    { name: "SLAVE_ADDR",
+      desc: "I2C slave read or write address register",
+      swaccess: "ro",
+      hwaccess: "hrw",
+      fields: [
+        { bits: "7:0",
+          name: "ADDR0",
+          desc: "I2C slave read or write address[7:0]",
+        }
+        { bits: "15:8",
+          name: "ADDR1",
+          desc: "I2C slave read or write address[15:8]",
+        }
+        { bits: "23:16",
+          name: "ADDR2",
+          desc: "I2C slave read or write address[23:16]",
+        }
+        { bits: "31:24",
+          name: "ADDR3",
+          desc: "I2C slave read or write address[31:24]",
+        }
+      ]
+    }
+    { name: "SLAVE_WDATA",
+      desc: "I2C slave write data register",
+      swaccess: "ro",
+      hwaccess: "hrw",
+      fields: [
+        { bits: "7:0",
+          name: "WDATA0",
+          desc: "I2C slave write data[7:0]",
+        }
+        { bits: "15:8",
+          name: "WDATA1",
+          desc: "I2C slave write data[15:8]",
+        }
+        { bits: "23:16",
+          name: "WDATA2",
+          desc: "I2C slave write data[23:16]",
+        }
+        { bits: "31:24",
+          name: "WDATA3",
+          desc: "I2C slave write data[31:24]",
+        }
+      ]
+    }
+    { name: "SLAVE_RDATA",
+      desc: "I2C slave read data register",
+      swaccess: "rw",
+      hwaccess: "hro",
+      fields: [
+        { bits: "31:0",
+          desc: "I2C slave read data",
+        }
+      ]
+    }
+  ]
+}