From 76be215ee1271adb4a9ed04ee8b102c28e825798 Mon Sep 17 00:00:00 2001 From: oharboe Date: Wed, 8 Oct 2008 05:09:59 +0000 Subject: [PATCH] John McCarthy adds support for DMA mode access as supported by EJTAG 1.0/2.0 processors git-svn-id: svn://svn.berlios.de/openocd/trunk@1029 b42882b7-edfa-0310-969c-e2dbd0fdcd60 --- src/target/Makefile.am | 4 +- src/target/mips32_dmaacc.c | 441 +++++++++++++++++++++++++++++++++++++ src/target/mips32_dmaacc.h | 53 +++++ src/target/mips_ejtag.c | 14 ++ src/target/mips_ejtag.h | 2 +- src/target/mips_m4k.c | 12 +- 6 files changed, 521 insertions(+), 5 deletions(-) create mode 100644 src/target/mips32_dmaacc.c create mode 100644 src/target/mips32_dmaacc.h diff --git a/src/target/Makefile.am b/src/target/Makefile.am index b29b4005f..6a7c3c7ed 100644 --- a/src/target/Makefile.am +++ b/src/target/Makefile.am @@ -13,11 +13,11 @@ libtarget_a_SOURCES = target.c register.c breakpoints.c armv4_5.c embeddedice.c arm_jtag.c arm7_9_common.c algorithm.c arm920t.c arm720t.c armv4_5_mmu.c armv4_5_cache.c arm_disassembler.c \ arm966e.c arm926ejs.c feroceon.c etb.c xscale.c arm_simulator.c image.c armv7m.c cortex_m3.c cortex_swjdp.c \ etm_dummy.c $(OOCD_TRACE_FILES) target_request.c trace.c arm11.c arm11_dbgtap.c mips32.c mips_m4k.c \ - mips32_pracc.c mips_ejtag.c + mips32_pracc.c mips32_dmaacc.c mips_ejtag.c noinst_HEADERS = target.h trace.h register.h armv4_5.h embeddedice.h etm.h arm7tdmi.h arm9tdmi.h \ arm_jtag.h arm7_9_common.h arm920t.h arm720t.h armv4_5_mmu.h armv4_5_cache.h breakpoints.h algorithm.h \ arm_disassembler.h arm966e.h arm926ejs.h etb.h xscale.h arm_simulator.h image.h armv7m.h cortex_m3.h cortex_swjdp.h \ - etm_dummy.h oocd_trace.h target_request.h trace.h arm11.h mips32.h mips_m4k.h mips_ejtag.h mips32_pracc.h + etm_dummy.h oocd_trace.h target_request.h trace.h arm11.h mips32.h mips_m4k.h mips_ejtag.h mips32_pracc.h mips32_dmaacc.h nobase_dist_pkglib_DATA = xscale/debug_handler.bin target/at91eb40a.cfg \ event/at91r40008_reset.script event/sam7x256_reset.script \ diff --git a/src/target/mips32_dmaacc.c b/src/target/mips32_dmaacc.c new file mode 100644 index 000000000..96426c0ae --- /dev/null +++ b/src/target/mips32_dmaacc.c @@ -0,0 +1,441 @@ +/*************************************************************************** + * Copyright (C) 2008 by John McCarthy * + * jgmcc@magma.ca * + * * + * Copyright (C) 2008 by Spencer Oliver * + * spen@spen-soft.co.uk * + * * + * Copyright (C) 2008 by David T.L. Wong * + * * + * This program is free software; you can redistribute it and/or modify * + * it under the terms of the GNU General Public License as published by * + * the Free Software Foundation; either version 2 of the License, or * + * (at your option) any later version. * + * * + * This program is distributed in the hope that it will be useful, * + * but WITHOUT ANY WARRANTY; without even the implied warranty of * + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * + * GNU General Public License for more details. * + * * + * You should have received a copy of the GNU General Public License * + * along with this program; if not, write to the * + * Free Software Foundation, Inc., * + * 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. * + ***************************************************************************/ +#ifdef HAVE_CONFIG_H +#include "config.h" +#endif + +#include +#include "log.h" +#include "mips32.h" +#include "mips32_dmaacc.h" + +/* + * The following logic shamelessly cloned from HairyDairyMaid's wrt54g_debrick + * to support the Broadcom BCM5352 SoC in the Linksys WRT54GL wireless router + * (and any others that support EJTAG DMA transfers). + * Note: This only supports memory read/write. Since the BCM5352 doesn't + * appear to support PRACC accesses, all debug functions except halt + * do not work. Still, this does allow erasing/writing flash as well as + * displaying/modifying memory and memory mapped registers. + */ + +static int ejtag_dma_read(mips_ejtag_t *ejtag_info, u32 addr, u32 *data) +{ + u32 v; + u32 ctrl_reg; + int retries = RETRY_ATTEMPTS; + +begin_ejtag_dma_read: + + // Setup Address + v = addr; + mips_ejtag_set_instr(ejtag_info, EJTAG_INST_ADDRESS, NULL); + mips_ejtag_drscan_32(ejtag_info, &v); + + // Initiate DMA Read & set DSTRT + mips_ejtag_set_instr(ejtag_info, EJTAG_INST_CONTROL, NULL); + ctrl_reg = EJTAG_CTRL_DMAACC | EJTAG_CTRL_DRWN | EJTAG_CTRL_DMA_WORD | EJTAG_CTRL_DSTRT | EJTAG_CTRL_PROBEN | EJTAG_CTRL_PRACC; + mips_ejtag_drscan_32(ejtag_info, &ctrl_reg); + + // Wait for DSTRT to Clear + do { + ctrl_reg = EJTAG_CTRL_DMAACC | EJTAG_CTRL_PROBEN | EJTAG_CTRL_PRACC; + mips_ejtag_drscan_32(ejtag_info, &ctrl_reg); + } while(ctrl_reg & EJTAG_CTRL_DSTRT); + + // Read Data + mips_ejtag_set_instr(ejtag_info, EJTAG_INST_DATA, NULL); + mips_ejtag_drscan_32(ejtag_info, data); + + // Clear DMA & Check DERR + mips_ejtag_set_instr(ejtag_info, EJTAG_INST_CONTROL, NULL); + ctrl_reg = EJTAG_CTRL_PROBEN | EJTAG_CTRL_PRACC; + mips_ejtag_drscan_32(ejtag_info, &ctrl_reg); + if (ctrl_reg & EJTAG_CTRL_DERR) + { + if (retries--) { + printf("DMA Read Addr = %08x Data = ERROR ON READ (retrying)\n", addr); + goto begin_ejtag_dma_read; + } else printf("DMA Read Addr = %08x Data = ERROR ON READ\n", addr); + return ERROR_JTAG_DEVICE_ERROR; + } + + return ERROR_OK; +} + +static int ejtag_dma_read_h(mips_ejtag_t *ejtag_info, u32 addr, u16 *data) +{ + u32 v; + u32 ctrl_reg; + int retries = RETRY_ATTEMPTS; + +begin_ejtag_dma_read_h: + + // Setup Address + v = addr; + mips_ejtag_set_instr(ejtag_info, EJTAG_INST_ADDRESS, NULL); + mips_ejtag_drscan_32(ejtag_info, &v); + + // Initiate DMA Read & set DSTRT + mips_ejtag_set_instr(ejtag_info, EJTAG_INST_CONTROL, NULL); + ctrl_reg = EJTAG_CTRL_DMAACC | EJTAG_CTRL_DRWN | EJTAG_CTRL_DMA_HALFWORD | EJTAG_CTRL_DSTRT | EJTAG_CTRL_PROBEN | EJTAG_CTRL_PRACC; + mips_ejtag_drscan_32(ejtag_info, &ctrl_reg); + + // Wait for DSTRT to Clear + do { + ctrl_reg = EJTAG_CTRL_DMAACC | EJTAG_CTRL_PROBEN | EJTAG_CTRL_PRACC; + mips_ejtag_drscan_32(ejtag_info, &ctrl_reg); + } while(ctrl_reg & EJTAG_CTRL_DSTRT); + + // Read Data + mips_ejtag_set_instr(ejtag_info, EJTAG_INST_DATA, NULL); + mips_ejtag_drscan_32(ejtag_info, &v); + + // Clear DMA & Check DERR + mips_ejtag_set_instr(ejtag_info, EJTAG_INST_CONTROL, NULL); + ctrl_reg = EJTAG_CTRL_PROBEN | EJTAG_CTRL_PRACC; + mips_ejtag_drscan_32(ejtag_info, &ctrl_reg); + if (ctrl_reg & EJTAG_CTRL_DERR) + { + if (retries--) { + printf("DMA Read Addr = %08x Data = ERROR ON READ (retrying)\n", addr); + goto begin_ejtag_dma_read_h; + } else printf("DMA Read Addr = %08x Data = ERROR ON READ\n", addr); + return ERROR_JTAG_DEVICE_ERROR; + } + + // Handle the bigendian/littleendian + if ( addr & 0x2 ) *data = (v>>16)&0xffff ; + else *data = (v&0x0000ffff) ; + + return ERROR_OK; +} + +static int ejtag_dma_read_b(mips_ejtag_t *ejtag_info, u32 addr, u8 *data) +{ + u32 v; + u32 ctrl_reg; + int retries = RETRY_ATTEMPTS; + +begin_ejtag_dma_read_b: + + // Setup Address + v = addr; + mips_ejtag_set_instr(ejtag_info, EJTAG_INST_ADDRESS, NULL); + mips_ejtag_drscan_32(ejtag_info, &v); + + // Initiate DMA Read & set DSTRT + mips_ejtag_set_instr(ejtag_info, EJTAG_INST_CONTROL, NULL); + ctrl_reg = EJTAG_CTRL_DMAACC | EJTAG_CTRL_DRWN | EJTAG_CTRL_DMA_BYTE | EJTAG_CTRL_DSTRT | EJTAG_CTRL_PROBEN | EJTAG_CTRL_PRACC; + mips_ejtag_drscan_32(ejtag_info, &ctrl_reg); + + // Wait for DSTRT to Clear + do { + ctrl_reg = EJTAG_CTRL_DMAACC | EJTAG_CTRL_PROBEN | EJTAG_CTRL_PRACC; + mips_ejtag_drscan_32(ejtag_info, &ctrl_reg); + } while(ctrl_reg & EJTAG_CTRL_DSTRT); + + // Read Data + mips_ejtag_set_instr(ejtag_info, EJTAG_INST_DATA, NULL); + mips_ejtag_drscan_32(ejtag_info, &v); + + // Clear DMA & Check DERR + mips_ejtag_set_instr(ejtag_info, EJTAG_INST_CONTROL, NULL); + ctrl_reg = EJTAG_CTRL_PROBEN | EJTAG_CTRL_PRACC; + mips_ejtag_drscan_32(ejtag_info, &ctrl_reg); + if (ctrl_reg & EJTAG_CTRL_DERR) + { + if (retries--) { + printf("DMA Read Addr = %08x Data = ERROR ON READ (retrying)\n", addr); + goto begin_ejtag_dma_read_b; + } else printf("DMA Read Addr = %08x Data = ERROR ON READ\n", addr); + return ERROR_JTAG_DEVICE_ERROR; + } + + // Handle the bigendian/littleendian + switch(addr & 0x3) { + case 0: *data = v & 0xff; break; + case 1: *data = (v>>8) & 0xff; break; + case 2: *data = (v>>16) & 0xff; break; + case 3: *data = (v>>24) & 0xff; break; + } + + return ERROR_OK; +} + +static int ejtag_dma_write(mips_ejtag_t *ejtag_info, u32 addr, u32 data) +{ + u32 v; + u32 ctrl_reg; + int retries = RETRY_ATTEMPTS; + +begin_ejtag_dma_write: + + // Setup Address + v = addr; + mips_ejtag_set_instr(ejtag_info, EJTAG_INST_ADDRESS, NULL); + mips_ejtag_drscan_32(ejtag_info, &v); + + // Setup Data + v = data; + mips_ejtag_set_instr(ejtag_info, EJTAG_INST_DATA, NULL); + mips_ejtag_drscan_32(ejtag_info, &v); + + // Initiate DMA Write & set DSTRT + mips_ejtag_set_instr(ejtag_info, EJTAG_INST_CONTROL, NULL); + ctrl_reg = EJTAG_CTRL_DMAACC | EJTAG_CTRL_DMA_WORD | EJTAG_CTRL_DSTRT | EJTAG_CTRL_PROBEN | EJTAG_CTRL_PRACC; + mips_ejtag_drscan_32(ejtag_info, &ctrl_reg); + + // Wait for DSTRT to Clear + do { + ctrl_reg = EJTAG_CTRL_DMAACC | EJTAG_CTRL_PROBEN | EJTAG_CTRL_PRACC; + mips_ejtag_drscan_32(ejtag_info, &ctrl_reg); + } while(ctrl_reg & EJTAG_CTRL_DSTRT); + + // Clear DMA & Check DERR + mips_ejtag_set_instr(ejtag_info, EJTAG_INST_CONTROL, NULL); + ctrl_reg = EJTAG_CTRL_PROBEN | EJTAG_CTRL_PRACC; + mips_ejtag_drscan_32(ejtag_info, &ctrl_reg); + if (ctrl_reg & EJTAG_CTRL_DERR) + { + if (retries--) { + printf("DMA Write Addr = %08x Data = ERROR ON WRITE (retrying)\n", addr); + goto begin_ejtag_dma_write; + } else printf("DMA Write Addr = %08x Data = ERROR ON WRITE\n", addr); + return ERROR_JTAG_DEVICE_ERROR; + } + + return ERROR_OK; +} + +static int ejtag_dma_write_h(mips_ejtag_t *ejtag_info, u32 addr, u32 data) +{ + u32 v; + u32 ctrl_reg; + int retries = RETRY_ATTEMPTS; + + + // Handle the bigendian/littleendian + data &= 0xffff; + data |= data<<16; + +begin_ejtag_dma_write_h: + + // Setup Address + v = addr; + mips_ejtag_set_instr(ejtag_info, EJTAG_INST_ADDRESS, NULL); + mips_ejtag_drscan_32(ejtag_info, &v); + + // Setup Data + v = data; + mips_ejtag_set_instr(ejtag_info, EJTAG_INST_DATA, NULL); + mips_ejtag_drscan_32(ejtag_info, &v); + + // Initiate DMA Write & set DSTRT + mips_ejtag_set_instr(ejtag_info, EJTAG_INST_CONTROL, NULL); + ctrl_reg = EJTAG_CTRL_DMAACC | EJTAG_CTRL_DMA_HALFWORD | EJTAG_CTRL_DSTRT | EJTAG_CTRL_PROBEN | EJTAG_CTRL_PRACC; + mips_ejtag_drscan_32(ejtag_info, &ctrl_reg); + + // Wait for DSTRT to Clear + do { + ctrl_reg = EJTAG_CTRL_DMAACC | EJTAG_CTRL_PROBEN | EJTAG_CTRL_PRACC; + mips_ejtag_drscan_32(ejtag_info, &ctrl_reg); + } while(ctrl_reg & EJTAG_CTRL_DSTRT); + + // Clear DMA & Check DERR + mips_ejtag_set_instr(ejtag_info, EJTAG_INST_CONTROL, NULL); + ctrl_reg = EJTAG_CTRL_PROBEN | EJTAG_CTRL_PRACC; + mips_ejtag_drscan_32(ejtag_info, &ctrl_reg); + if (ctrl_reg & EJTAG_CTRL_DERR) + { + if (retries--) { + printf("DMA Write Addr = %08x Data = ERROR ON WRITE (retrying)\n", addr); + goto begin_ejtag_dma_write_h; + } else printf("DMA Write Addr = %08x Data = ERROR ON WRITE\n", addr); + return ERROR_JTAG_DEVICE_ERROR; + } + + return ERROR_OK; +} + +static int ejtag_dma_write_b(mips_ejtag_t *ejtag_info, u32 addr, u32 data) +{ + u32 v; + u32 ctrl_reg; + int retries = RETRY_ATTEMPTS; + + + // Handle the bigendian/littleendian + data &= 0xff; + data |= data<<8; + data |= data<<16; + +begin_ejtag_dma_write_b: + + // Setup Address + v = addr; + mips_ejtag_set_instr(ejtag_info, EJTAG_INST_ADDRESS, NULL); + mips_ejtag_drscan_32(ejtag_info, &v); + + // Setup Data + v = data; + mips_ejtag_set_instr(ejtag_info, EJTAG_INST_DATA, NULL); + mips_ejtag_drscan_32(ejtag_info, &v); + + // Initiate DMA Write & set DSTRT + mips_ejtag_set_instr(ejtag_info, EJTAG_INST_CONTROL, NULL); + ctrl_reg = EJTAG_CTRL_DMAACC | EJTAG_CTRL_DMA_BYTE | EJTAG_CTRL_DSTRT | EJTAG_CTRL_PROBEN | EJTAG_CTRL_PRACC; + mips_ejtag_drscan_32(ejtag_info, &ctrl_reg); + + // Wait for DSTRT to Clear + do { + ctrl_reg = EJTAG_CTRL_DMAACC | EJTAG_CTRL_PROBEN | EJTAG_CTRL_PRACC; + mips_ejtag_drscan_32(ejtag_info, &ctrl_reg); + } while(ctrl_reg & EJTAG_CTRL_DSTRT); + + // Clear DMA & Check DERR + mips_ejtag_set_instr(ejtag_info, EJTAG_INST_CONTROL, NULL); + ctrl_reg = EJTAG_CTRL_PROBEN | EJTAG_CTRL_PRACC; + mips_ejtag_drscan_32(ejtag_info, &ctrl_reg); + if (ctrl_reg & EJTAG_CTRL_DERR) + { + if (retries--) { + printf("DMA Write Addr = %08x Data = ERROR ON WRITE (retrying)\n", addr); + goto begin_ejtag_dma_write_b; + } else printf("DMA Write Addr = %08x Data = ERROR ON WRITE\n", addr); + return ERROR_JTAG_DEVICE_ERROR; + } + + return ERROR_OK; +} + + +int mips32_dmaacc_read_mem(mips_ejtag_t *ejtag_info, u32 addr, int size, int count, void *buf) +{ + switch (size) + { + case 1: + return mips32_dmaacc_read_mem8(ejtag_info, addr, count, (u8*)buf); + case 2: + return mips32_dmaacc_read_mem16(ejtag_info, addr, count, (u16*)buf); + case 4: + return mips32_dmaacc_read_mem32(ejtag_info, addr, count, (u32*)buf); + } + + return ERROR_OK; +} + +int mips32_dmaacc_read_mem32(mips_ejtag_t *ejtag_info, u32 addr, int count, u32 *buf) +{ + int i; + int retval; + + for(i=0; iejtag_ctrl = EJTAG_CTRL_ROCC | EJTAG_CTRL_PRACC | EJTAG_CTRL_PROBEN | EJTAG_CTRL_SETDEV; mips_ejtag_drscan_32(ejtag_info, &ejtag_info->ejtag_ctrl); + LOG_DEBUG("ejtag_ctrl: 0x%8.8x", ejtag_info->ejtag_ctrl); + if((ejtag_info->ejtag_ctrl & EJTAG_CTRL_BRKST) == 0) + LOG_DEBUG("Failed to enter Debug Mode!"); return ERROR_OK; } @@ -275,6 +278,17 @@ int mips_ejtag_init(mips_ejtag_t *ejtag_info) LOG_DEBUG("EJTAG: Unknown Version Detected"); break; } + LOG_DEBUG("EJTAG: features:%s%s%s%s%s%s%s", + ejtag_info->impcode & (1<<28) ? " R3k": " R4k", + ejtag_info->impcode & (1<<24) ? " DINT": "", + ejtag_info->impcode & (1<<22) ? " ASID_8": "", + ejtag_info->impcode & (1<<21) ? " ASID_6": "", + ejtag_info->impcode & (1<<16) ? " MIPS16": "", + ejtag_info->impcode & (1<<14) ? " noDMA": " DMA", + ejtag_info->impcode & (1<<0) ? " MIPS64": " MIPS32" + ); + if((ejtag_info->impcode & (1<<14)) == 0) + LOG_DEBUG("EJTAG: DMA Access Mode Support Enabled"); /* set initial state for ejtag control reg */ ejtag_info->ejtag_ctrl = EJTAG_CTRL_ROCC | EJTAG_CTRL_PRACC | EJTAG_CTRL_PROBEN | EJTAG_CTRL_SETDEV; diff --git a/src/target/mips_ejtag.h b/src/target/mips_ejtag.h index b25bd0265..cd31d2334 100644 --- a/src/target/mips_ejtag.h +++ b/src/target/mips_ejtag.h @@ -38,7 +38,7 @@ #define EJTAG_INST_TCBCONTROLA 0x10 #define EJTAG_INST_TCBCONTROLB 0x11 #define EJTAG_INST_TCBDATA 0x12 -#define EJTAG_INST_BYPASS 0x1F +#define EJTAG_INST_BYPASS 0xFF #define EJTAG_CTRL_TOF (1 << 1) #define EJTAG_CTRL_TIF (1 << 2) diff --git a/src/target/mips_m4k.c b/src/target/mips_m4k.c index 0db7a94bc..03995b5e6 100644 --- a/src/target/mips_m4k.c +++ b/src/target/mips_m4k.c @@ -512,7 +512,11 @@ int mips_m4k_read_memory(struct target_s *target, u32 address, u32 size, u32 cou case 4: case 2: case 1: - return mips32_pracc_read_mem(ejtag_info, address, size, count, (void *)buffer); + /* if noDMA off, use DMAACC mode for memory read */ + if(ejtag_info->impcode & (1<<14)) + return mips32_pracc_read_mem(ejtag_info, address, size, count, (void *)buffer); + else + return mips32_dmaacc_read_mem(ejtag_info, address, size, count, (void *)buffer); default: LOG_ERROR("BUG: we shouldn't get here"); exit(-1); @@ -547,7 +551,11 @@ int mips_m4k_write_memory(struct target_s *target, u32 address, u32 size, u32 co case 4: case 2: case 1: - mips32_pracc_write_mem(ejtag_info, address, size, count, (void *)buffer); + /* if noDMA off, use DMAACC mode for memory write */ + if(ejtag_info->impcode & (1<<14)) + mips32_pracc_write_mem(ejtag_info, address, size, count, (void *)buffer); + else + mips32_dmaacc_write_mem(ejtag_info, address, size, count, (void *)buffer); break; default: LOG_ERROR("BUG: we shouldn't get here");