liangkangnan
parent
e714a0ba63
commit
000bb19ad2
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@ -0,0 +1,25 @@
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RISCV_ARCH := rv32im
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RISCV_ABI := ilp32
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RISCV_PATH := ../../../tools/gnu-mcu-eclipse-riscv-none-gcc-8.2.0-2.2-20190521-0004-win64/
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CFLAGS += -march=$(RISCV_ARCH)
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CFLAGS += -mabi=$(RISCV_ABI)
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CFLAGS += -static -mcmodel=medany -fvisibility=hidden -nostdlib -nostartfiles
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RISCV_GCC := $(abspath $(RISCV_PATH)/bin/riscv-none-embed-gcc)
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RISCV_AS := $(abspath $(RISCV_PATH)/bin/riscv-none-embed-as)
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RISCV_GXX := $(abspath $(RISCV_PATH)/bin/riscv-none-embed-g++)
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RISCV_OBJDUMP := $(abspath $(RISCV_PATH)/bin/riscv-none-embed-objdump)
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RISCV_GDB := $(abspath $(RISCV_PATH)/bin/riscv-none-embed-gdb)
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RISCV_AR := $(abspath $(RISCV_PATH)/bin/riscv-none-embed-ar)
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RISCV_OBJCOPY := $(abspath $(RISCV_PATH)/bin/riscv-none-embed-objcopy)
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RISCV_READELF := $(abspath $(RISCV_PATH)/bin/riscv-none-embed-readelf)
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.PHONY: all
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all:
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$(RISCV_GCC) $(CFLAGS) start.S main.c -Tlink.ld -o gpio
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$(RISCV_OBJCOPY) -O binary gpio gpio.bin
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$(RISCV_OBJDUMP) --disassemble-all gpio > gpio.dump
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@ -0,0 +1 @@
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通过一个GPIO来控制板上的LED以1Hz频率闪烁。
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Binary file not shown.
Binary file not shown.
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@ -0,0 +1,167 @@
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gpio: file format elf32-littleriscv
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Disassembly of section .init:
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00000000 <_start>:
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0: 0040006f j 4 <_reset_handler>
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00000004 <_reset_handler>:
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4: 10000197 auipc gp,0x10000
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8: 7fc18193 addi gp,gp,2044 # 10000800 <__global_pointer$>
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c: 00018113 mv sp,gp
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10: 00000d13 li s10,0
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14: 00000d93 li s11,0
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18: 1d000513 li a0,464
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1c: 10000597 auipc a1,0x10000
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20: fe458593 addi a1,a1,-28 # 10000000 <_data>
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24: 10000617 auipc a2,0x10000
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28: fdc60613 addi a2,a2,-36 # 10000000 <_data>
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2c: 00c5fc63 bgeu a1,a2,44 <_reset_handler+0x40>
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30: 00052283 lw t0,0(a0)
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34: 0055a023 sw t0,0(a1)
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38: 00450513 addi a0,a0,4
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3c: 00458593 addi a1,a1,4
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40: fec5e8e3 bltu a1,a2,30 <_reset_handler+0x2c>
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44: 10000517 auipc a0,0x10000
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48: fbc50513 addi a0,a0,-68 # 10000000 <_data>
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4c: 10000597 auipc a1,0x10000
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50: fb458593 addi a1,a1,-76 # 10000000 <_data>
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54: 00b57863 bgeu a0,a1,64 <_reset_handler+0x60>
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58: 00052023 sw zero,0(a0)
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5c: 00450513 addi a0,a0,4
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60: feb56ce3 bltu a0,a1,58 <_reset_handler+0x54>
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64: 134000ef jal ra,198 <main>
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68: 00100d13 li s10,1
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0000006c <loop>:
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6c: 0000006f j 6c <loop>
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Disassembly of section .text:
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00000070 <delay_ms>:
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70: fb010113 addi sp,sp,-80
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74: 04812623 sw s0,76(sp)
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78: 05010413 addi s0,sp,80
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7c: faa42e23 sw a0,-68(s0)
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80: c0002773 rdcycle a4
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84: fee42623 sw a4,-20(s0)
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88: fec42703 lw a4,-20(s0)
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8c: fee42023 sw a4,-32(s0)
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90: fe042223 sw zero,-28(s0)
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94: c8002773 rdcycleh a4
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98: fce42e23 sw a4,-36(s0)
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9c: fdc42703 lw a4,-36(s0)
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a0: 00070793 mv a5,a4
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a4: 00000813 li a6,0
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a8: 00079e93 slli t4,a5,0x0
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ac: 00000e13 li t3,0
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b0: fe042683 lw a3,-32(s0)
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b4: fe442703 lw a4,-28(s0)
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b8: 01c687b3 add a5,a3,t3
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bc: 00078513 mv a0,a5
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c0: 00d53533 sltu a0,a0,a3
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c4: 01d70833 add a6,a4,t4
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c8: 01050733 add a4,a0,a6
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cc: 00070813 mv a6,a4
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d0: fef42023 sw a5,-32(s0)
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d4: ff042223 sw a6,-28(s0)
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d8: c00027f3 rdcycle a5
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dc: fcf42c23 sw a5,-40(s0)
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e0: fd842783 lw a5,-40(s0)
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e4: fcf42823 sw a5,-48(s0)
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e8: fc042a23 sw zero,-44(s0)
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ec: c80027f3 rdcycleh a5
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f0: fcf42623 sw a5,-52(s0)
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f4: fcc42783 lw a5,-52(s0)
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f8: 00078f13 mv t5,a5
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fc: 00000f93 li t6,0
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100: 000f1393 slli t2,t5,0x0
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104: 00000313 li t1,0
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108: fd042683 lw a3,-48(s0)
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10c: fd442703 lw a4,-44(s0)
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110: 006687b3 add a5,a3,t1
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114: 00078513 mv a0,a5
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118: 00d53533 sltu a0,a0,a3
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11c: 00770833 add a6,a4,t2
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120: 01050733 add a4,a0,a6
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124: 00070813 mv a6,a4
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128: fcf42823 sw a5,-48(s0)
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12c: fd042a23 sw a6,-44(s0)
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130: fbc42703 lw a4,-68(s0)
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134: 0000c7b7 lui a5,0xc
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138: 35078793 addi a5,a5,848 # c350 <__stack_size+0xbf50>
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13c: 02f707b3 mul a5,a4,a5
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140: 00078593 mv a1,a5
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144: 00000613 li a2,0
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148: fe042683 lw a3,-32(s0)
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14c: fe442703 lw a4,-28(s0)
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150: 00d587b3 add a5,a1,a3
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154: 00078513 mv a0,a5
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158: 00b53533 sltu a0,a0,a1
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15c: 00e60833 add a6,a2,a4
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160: 01050733 add a4,a0,a6
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164: 00070813 mv a6,a4
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168: fd442703 lw a4,-44(s0)
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16c: 00080693 mv a3,a6
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170: f6d764e3 bltu a4,a3,d8 <delay_ms+0x68>
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174: fd442703 lw a4,-44(s0)
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178: 00080693 mv a3,a6
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17c: 00d71663 bne a4,a3,188 <delay_ms+0x118>
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180: fd042703 lw a4,-48(s0)
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184: f4f76ae3 bltu a4,a5,d8 <delay_ms+0x68>
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188: 00000013 nop
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18c: 04c12403 lw s0,76(sp)
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190: 05010113 addi sp,sp,80
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194: 00008067 ret
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00000198 <main>:
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198: ff010113 addi sp,sp,-16
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19c: 00112623 sw ra,12(sp)
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1a0: 00812423 sw s0,8(sp)
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1a4: 01010413 addi s0,sp,16
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1a8: 400007b7 lui a5,0x40000
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1ac: 00478793 addi a5,a5,4 # 40000004 <__global_pointer$+0x2ffff804>
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1b0: 0007a703 lw a4,0(a5)
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1b4: 400007b7 lui a5,0x40000
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1b8: 00478793 addi a5,a5,4 # 40000004 <__global_pointer$+0x2ffff804>
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1bc: 00174713 xori a4,a4,1
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1c0: 00e7a023 sw a4,0(a5)
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1c4: 1f400513 li a0,500
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1c8: ea9ff0ef jal ra,70 <delay_ms>
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1cc: fddff06f j 1a8 <main+0x10>
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Disassembly of section .stack:
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10000400 <_sp-0x400>:
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...
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Disassembly of section .comment:
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00000000 <.comment>:
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0: 3a434347 fmsub.d ft6,ft6,ft4,ft7,rmm
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4: 2820 fld fs0,80(s0)
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6: 20554e47 fmsub.s ft8,fa0,ft5,ft4,rmm
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a: 434d li t1,19
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c: 2055 jal b0 <delay_ms+0x40>
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e: 6345 lui t1,0x11
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10: 696c flw fa1,84(a0)
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12: 7370 flw fa2,100(a4)
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14: 2065 jal bc <delay_ms+0x4c>
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16: 4952 lw s2,20(sp)
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18: 562d4353 0x562d4353
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1c: 4520 lw s0,72(a0)
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1e: 626d lui tp,0x1b
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20: 6465 lui s0,0x19
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22: 6564 flw fs1,76(a0)
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24: 2064 fld fs1,192(s0)
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26: 2c434347 0x2c434347
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2a: 3620 fld fs0,104(a2)
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2c: 2d34 fld fa3,88(a0)
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2e: 6962 flw fs2,24(sp)
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30: 2974 fld fa3,208(a0)
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32: 3820 fld fs0,112(s0)
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34: 322e fld ft4,232(sp)
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36: 302e fld ft0,232(sp)
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...
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@ -0,0 +1,147 @@
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OUTPUT_ARCH( "riscv" )
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ENTRY(_start)
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MEMORY
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{
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flash (wxa!ri) : ORIGIN = 0x00000000, LENGTH = 4K
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ram (wxa!ri) : ORIGIN = 0x10000000, LENGTH = 2K
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}
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SECTIONS
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{
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__stack_size = DEFINED(__stack_size) ? __stack_size : 1K;
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.init :
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{
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KEEP (*(SORT_NONE(.init)))
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} >flash AT>flash
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.text :
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{
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*(.text.unlikely .text.unlikely.*)
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*(.text.startup .text.startup.*)
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*(.text .text.*)
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*(.gnu.linkonce.t.*)
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} >flash AT>flash
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. = ALIGN(4);
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PROVIDE (__etext = .);
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PROVIDE (_etext = .);
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PROVIDE (etext = .);
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.preinit_array :
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{
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PROVIDE_HIDDEN (__preinit_array_start = .);
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KEEP (*(.preinit_array))
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PROVIDE_HIDDEN (__preinit_array_end = .);
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} >flash AT>flash
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.init_array :
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{
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PROVIDE_HIDDEN (__init_array_start = .);
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KEEP (*(SORT_BY_INIT_PRIORITY(.init_array.*) SORT_BY_INIT_PRIORITY(.ctors.*)))
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KEEP (*(.init_array EXCLUDE_FILE (*crtbegin.o *crtbegin?.o *crtend.o *crtend?.o ) .ctors))
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PROVIDE_HIDDEN (__init_array_end = .);
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} >flash AT>flash
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.fini_array :
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{
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PROVIDE_HIDDEN (__fini_array_start = .);
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KEEP (*(SORT_BY_INIT_PRIORITY(.fini_array.*) SORT_BY_INIT_PRIORITY(.dtors.*)))
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KEEP (*(.fini_array EXCLUDE_FILE (*crtbegin.o *crtbegin?.o *crtend.o *crtend?.o ) .dtors))
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PROVIDE_HIDDEN (__fini_array_end = .);
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} >flash AT>flash
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.ctors :
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{
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/* gcc uses crtbegin.o to find the start of
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the constructors, so we make sure it is
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first. Because this is a wildcard, it
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doesn't matter if the user does not
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actually link against crtbegin.o; the
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linker won't look for a file to match a
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wildcard. The wildcard also means that it
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doesn't matter which directory crtbegin.o
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is in. */
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KEEP (*crtbegin.o(.ctors))
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KEEP (*crtbegin?.o(.ctors))
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/* We don't want to include the .ctor section from
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the crtend.o file until after the sorted ctors.
|
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The .ctor section from the crtend file contains the
|
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end of ctors marker and it must be last */
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KEEP (*(EXCLUDE_FILE (*crtend.o *crtend?.o ) .ctors))
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KEEP (*(SORT(.ctors.*)))
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KEEP (*(.ctors))
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} >flash AT>flash
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.dtors :
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{
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KEEP (*crtbegin.o(.dtors))
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KEEP (*crtbegin?.o(.dtors))
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KEEP (*(EXCLUDE_FILE (*crtend.o *crtend?.o ) .dtors))
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KEEP (*(SORT(.dtors.*)))
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KEEP (*(.dtors))
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} >flash AT>flash
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.lalign :
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{
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. = ALIGN(4);
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PROVIDE( _data_lma = . );
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} >flash AT>flash
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.dalign :
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{
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. = ALIGN(4);
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PROVIDE( _data = . );
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} >ram AT>flash
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.data :
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{
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*(.rdata)
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*(.rodata .rodata.*)
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*(.gnu.linkonce.r.*)
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*(.data .data.*)
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*(.gnu.linkonce.d.*)
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. = ALIGN(8);
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PROVIDE( __global_pointer$ = . + 0x800 );
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*(.sdata .sdata.*)
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*(.gnu.linkonce.s.*)
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. = ALIGN(8);
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*(.srodata.cst16)
|
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*(.srodata.cst8)
|
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*(.srodata.cst4)
|
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*(.srodata.cst2)
|
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*(.srodata .srodata.*)
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} >ram AT>flash
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. = ALIGN(4);
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PROVIDE( _edata = . );
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PROVIDE( edata = . );
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||||
|
||||
PROVIDE( _fbss = . );
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||||
PROVIDE( __bss_start = . );
|
||||
.bss :
|
||||
{
|
||||
*(.sbss*)
|
||||
*(.gnu.linkonce.sb.*)
|
||||
*(.bss .bss.*)
|
||||
*(.gnu.linkonce.b.*)
|
||||
*(COMMON)
|
||||
. = ALIGN(4);
|
||||
} >ram AT>ram
|
||||
|
||||
. = ALIGN(8);
|
||||
PROVIDE( _end = . );
|
||||
PROVIDE( end = . );
|
||||
|
||||
.stack ORIGIN(ram) + LENGTH(ram) - __stack_size :
|
||||
{
|
||||
PROVIDE( _heap_end = . );
|
||||
. = __stack_size;
|
||||
PROVIDE( _sp = . );
|
||||
} >ram AT>ram
|
||||
|
||||
}
|
||||
|
|
@ -0,0 +1,43 @@
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#include <stdint.h>
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|
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|
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// GPIO regs
|
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#define GPIO_BASE (0x40000000)
|
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#define GPIO_DATA (GPIO_BASE + (0x04))
|
||||
|
||||
|
||||
#define GPIO_REG(addr) (*((volatile uint32_t *)addr))
|
||||
|
||||
|
||||
#define MS(ms) (ms * 50000)
|
||||
|
||||
|
||||
#define read_csr(reg) ({ unsigned long __tmp; \
|
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asm volatile ("csrr %0, " #reg : "=r"(__tmp)); \
|
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__tmp; })
|
||||
|
||||
|
||||
|
||||
static void delay_ms(uint32_t ms)
|
||||
{
|
||||
uint64_t tmp;
|
||||
uint64_t cycle;
|
||||
|
||||
tmp = read_csr(cycle);
|
||||
tmp += (uint64_t)(read_csr(cycleh)) << 32;
|
||||
|
||||
do {
|
||||
cycle = read_csr(cycle);
|
||||
cycle += (uint64_t)(read_csr(cycleh)) << 32;
|
||||
} while (cycle < tmp + MS(ms));
|
||||
}
|
||||
|
||||
|
||||
|
||||
int main()
|
||||
{
|
||||
while (1) {
|
||||
GPIO_REG(GPIO_DATA) ^= 0x1;
|
||||
delay_ms(500);
|
||||
}
|
||||
}
|
||||
|
|
@ -0,0 +1,46 @@
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|||
.section .init;
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||||
.globl _start;
|
||||
.type _start,@function
|
||||
|
||||
|
||||
_start:
|
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j _reset_handler
|
||||
|
||||
_reset_handler:
|
||||
.option push
|
||||
.option norelax
|
||||
la gp, __global_pointer$
|
||||
.option pop
|
||||
la sp, _sp
|
||||
li x26, 0x00
|
||||
li x27, 0x00
|
||||
|
||||
/* Load data section */
|
||||
la a0, _data_lma
|
||||
la a1, _data
|
||||
la a2, _edata
|
||||
bgeu a1, a2, 2f
|
||||
1:
|
||||
lw t0, (a0)
|
||||
sw t0, (a1)
|
||||
addi a0, a0, 4
|
||||
addi a1, a1, 4
|
||||
bltu a1, a2, 1b
|
||||
2:
|
||||
|
||||
/* Clear bss section */
|
||||
la a0, __bss_start
|
||||
la a1, _end
|
||||
bgeu a0, a1, 2f
|
||||
1:
|
||||
sw zero, (a0)
|
||||
addi a0, a0, 4
|
||||
bltu a0, a1, 1b
|
||||
2:
|
||||
|
||||
call main
|
||||
|
||||
li x26, 0x01
|
||||
|
||||
loop:
|
||||
j loop
|
||||
Loading…
Reference in New Issue