X-Git-Url: https://review.openocd.org/gitweb?p=openocd.git;a=blobdiff_plain;f=src%2Ftarget%2Fmips32_pracc.c;h=6b43479fccc601694b1c26afef71b7991498eacb;hp=871b3f2119ec2039cc7eaba88c513592108cd41f;hb=1163435e19f316a4a97fd33f1467f5c1684db654;hpb=8f2c1659cf3d5a72ade3504caac248a0975aff2e diff --git a/src/target/mips32_pracc.c b/src/target/mips32_pracc.c index 871b3f2119..6b43479fcc 100644 --- a/src/target/mips32_pracc.c +++ b/src/target/mips32_pracc.c @@ -4,6 +4,11 @@ * * * Copyright (C) 2008 by David T.L. Wong * * * + * Copyright (C) 2009 by David N. Claffey * + * * + * Copyright (C) 2011 by Drasko DRASKOVIC * + * drasko.draskovic@gmail.com * + * * * 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 * @@ -19,51 +24,136 @@ * Free Software Foundation, Inc., * * 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. * ***************************************************************************/ + +/* +This version has optimized assembly routines for 32 bit operations: +- read word +- write word +- write array of words + +One thing to be aware of is that the MIPS32 cpu will execute the +instruction after a branch instruction (one delay slot). + +For example: + + LW $2, ($5 +10) + B foo + LW $1, ($2 +100) + +The LW $1, ($2 +100) instruction is also executed. If this is +not wanted a NOP can be inserted: + + LW $2, ($5 +10) + B foo + NOP + LW $1, ($2 +100) + +or the code can be changed to: + + B foo + LW $2, ($5 +10) + LW $1, ($2 +100) + +The original code contained NOPs. I have removed these and moved +the branches. + +I also moved the PRACC_STACK to 0xFF204000. This allows +the use of 16 bits offsets to get pointers to the input +and output area relative to the stack. Note that the stack +isn't really a stack (the stack pointer is not 'moving') +but a FIFO simulated in software. + +These changes result in a 35% speed increase when programming an +external flash. + +More improvement could be gained if the registers do no need +to be preserved but in that case the routines should be aware +OpenOCD is used as a flash programmer or as a debug tool. + +Nico Coesel +*/ + #ifdef HAVE_CONFIG_H #include "config.h" #endif -#include -#include "log.h" +#include + #include "mips32.h" #include "mips32_pracc.h" -typedef struct { - u32 *local_iparam; +struct mips32_pracc_context +{ + uint32_t *local_iparam; int num_iparam; - u32 *local_oparam; + uint32_t *local_oparam; int num_oparam; - u32 *code; + const uint32_t *code; int code_len; - u32 stack[32]; + uint32_t stack[32]; int stack_offset; - mips_ejtag_t *ejtag_info; -} mips32_pracc_context; + struct mips_ejtag *ejtag_info; +}; -static int wait_for_pracc_rw(mips_ejtag_t *ejtag_info, u32 *ctrl) +static int mips32_pracc_read_mem8(struct mips_ejtag *ejtag_info, + uint32_t addr, int count, uint8_t *buf); +static int mips32_pracc_read_mem16(struct mips_ejtag *ejtag_info, + uint32_t addr, int count, uint16_t *buf); +static int mips32_pracc_read_mem32(struct mips_ejtag *ejtag_info, + uint32_t addr, int count, uint32_t *buf); +static int mips32_pracc_read_u32(struct mips_ejtag *ejtag_info, + uint32_t addr, uint32_t *buf); + +static int mips32_pracc_write_mem8(struct mips_ejtag *ejtag_info, + uint32_t addr, int count, uint8_t *buf); +static int mips32_pracc_write_mem16(struct mips_ejtag *ejtag_info, + uint32_t addr, int count, uint16_t *buf); +static int mips32_pracc_write_mem32(struct mips_ejtag *ejtag_info, + uint32_t addr, int count, uint32_t *buf); +static int mips32_pracc_write_u32(struct mips_ejtag *ejtag_info, + uint32_t addr, uint32_t *buf); + +static int mips32_pracc_sync_cache(struct mips_ejtag *ejtag_info, + uint32_t start_addr, uint32_t end_addr); +static int mips32_pracc_clean_invalidate_cache(struct mips_ejtag *ejtag_info, + uint32_t start_addr, uint32_t end_addr); + +static int wait_for_pracc_rw(struct mips_ejtag *ejtag_info, uint32_t *ctrl) { - u32 ejtag_ctrl; - - while (1) + uint32_t ejtag_ctrl; + long long then = timeval_ms(); + int timeout; + int retval; + + /* wait for the PrAcc to become "1" */ + mips_ejtag_set_instr(ejtag_info, EJTAG_INST_CONTROL); + ejtag_ctrl = ejtag_info->ejtag_ctrl; + + while (1) { - mips_ejtag_set_instr(ejtag_info, EJTAG_INST_CONTROL, NULL); - ejtag_ctrl = ejtag_info->ejtag_ctrl; - mips_ejtag_drscan_32(ejtag_info, &ejtag_ctrl); + retval = mips_ejtag_drscan_32(ejtag_info, &ejtag_ctrl); + if (retval != ERROR_OK) + return retval; + if (ejtag_ctrl & EJTAG_CTRL_PRACC) break; - LOG_DEBUG("DEBUGMODULE: No memory access in progress!\n"); - return ERROR_JTAG_DEVICE_ERROR; + + if ( (timeout = timeval_ms()-then) > 1000 ) + { + LOG_DEBUG("DEBUGMODULE: No memory access in progress!"); + return ERROR_JTAG_DEVICE_ERROR; + } } - + *ctrl = ejtag_ctrl; return ERROR_OK; } -static int mips32_pracc_exec_read(mips32_pracc_context *ctx, u32 address) +static int mips32_pracc_exec_read(struct mips32_pracc_context *ctx, uint32_t address) { - mips_ejtag_t *ejtag_info = ctx->ejtag_info; + struct mips_ejtag *ejtag_info = ctx->ejtag_info; int offset; - u32 ejtag_ctrl, data; + uint32_t ejtag_ctrl, data; if ((address >= MIPS32_PRACC_PARAM_IN) && (address <= MIPS32_PRACC_PARAM_IN + ctx->num_iparam * 4)) @@ -78,7 +168,7 @@ static int mips32_pracc_exec_read(mips32_pracc_context *ctx, u32 address) data = ctx->local_oparam[offset]; } else if ((address >= MIPS32_PRACC_TEXT) - && (address <= MIPS32_PRACC_TEXT + ctx->code_len*4)) + && (address <= MIPS32_PRACC_TEXT + ctx->code_len * 4)) { offset = (address - MIPS32_PRACC_TEXT) / 4; data = ctx->code[offset]; @@ -92,45 +182,52 @@ static int mips32_pracc_exec_read(mips32_pracc_context *ctx, u32 address) { /* TODO: send JMP 0xFF200000 instruction. Hopefully processor jump back * to start of debug vector */ - + data = 0; - LOG_ERROR("Error reading unexpected address"); + LOG_ERROR("Error reading unexpected address 0x%8.8" PRIx32 "", address); return ERROR_JTAG_DEVICE_ERROR; } - + /* Send the data out */ - mips_ejtag_set_instr(ctx->ejtag_info, EJTAG_INST_DATA, NULL); - mips_ejtag_drscan_32(ctx->ejtag_info, &data); + mips_ejtag_set_instr(ctx->ejtag_info, EJTAG_INST_DATA); + mips_ejtag_drscan_32_out(ctx->ejtag_info, data); /* Clear the access pending bit (let the processor eat!) */ ejtag_ctrl = ejtag_info->ejtag_ctrl & ~EJTAG_CTRL_PRACC; - mips_ejtag_set_instr(ctx->ejtag_info, EJTAG_INST_CONTROL, NULL); - mips_ejtag_drscan_32(ctx->ejtag_info, &ejtag_ctrl); - - return ERROR_OK; + mips_ejtag_set_instr(ctx->ejtag_info, EJTAG_INST_CONTROL); + mips_ejtag_drscan_32_out(ctx->ejtag_info, ejtag_ctrl); + + return jtag_execute_queue(); } -static int mips32_pracc_exec_write(mips32_pracc_context *ctx, u32 address) +static int mips32_pracc_exec_write(struct mips32_pracc_context *ctx, uint32_t address) { - u32 ejtag_ctrl,data; + uint32_t ejtag_ctrl,data; int offset; - mips_ejtag_t *ejtag_info = ctx->ejtag_info; - - mips_ejtag_set_instr(ctx->ejtag_info, EJTAG_INST_DATA, NULL); - mips_ejtag_drscan_32(ctx->ejtag_info, &data); - + struct mips_ejtag *ejtag_info = ctx->ejtag_info; + int retval; + + mips_ejtag_set_instr(ctx->ejtag_info, EJTAG_INST_DATA); + retval = mips_ejtag_drscan_32(ctx->ejtag_info, &data); + if (retval != ERROR_OK) + return retval; + /* Clear access pending bit */ ejtag_ctrl = ejtag_info->ejtag_ctrl & ~EJTAG_CTRL_PRACC; - mips_ejtag_set_instr(ctx->ejtag_info, EJTAG_INST_CONTROL, NULL); - mips_ejtag_drscan_32(ctx->ejtag_info, &ejtag_ctrl); - + mips_ejtag_set_instr(ctx->ejtag_info, EJTAG_INST_CONTROL); + mips_ejtag_drscan_32_out(ctx->ejtag_info, ejtag_ctrl); + + retval = jtag_execute_queue(); + if (retval != ERROR_OK) + return retval; + if ((address >= MIPS32_PRACC_PARAM_IN) && (address <= MIPS32_PRACC_PARAM_IN + ctx->num_iparam * 4)) { offset = (address - MIPS32_PRACC_PARAM_IN) / 4; ctx->local_iparam[offset] = data; } - else if ((address >= MIPS32_PRACC_PARAM_OUT ) + else if ((address >= MIPS32_PRACC_PARAM_OUT) && (address <= MIPS32_PRACC_PARAM_OUT + ctx->num_oparam * 4)) { offset = (address - MIPS32_PRACC_PARAM_OUT) / 4; @@ -143,21 +240,22 @@ static int mips32_pracc_exec_write(mips32_pracc_context *ctx, u32 address) } else { - LOG_ERROR("Error writing unexpected address"); + LOG_ERROR("Error writing unexpected address 0x%8.8" PRIx32 "", address); return ERROR_JTAG_DEVICE_ERROR; } - + return ERROR_OK; } -int mips32_pracc_exec( mips_ejtag_t *ejtag_info, int code_len, u32 *code, int num_param_in, u32 *param_in, int num_param_out, u32 *param_out, int cycle) +int mips32_pracc_exec(struct mips_ejtag *ejtag_info, int code_len, const uint32_t *code, + int num_param_in, uint32_t *param_in, int num_param_out, uint32_t *param_out, int cycle) { - u32 ejtag_ctrl; - u32 address, data; - mips32_pracc_context ctx; + uint32_t ejtag_ctrl; + uint32_t address, data; + struct mips32_pracc_context ctx; int retval; int pass = 0; - + ctx.local_iparam = param_in; ctx.local_oparam = param_out; ctx.num_iparam = num_param_in; @@ -166,16 +264,18 @@ int mips32_pracc_exec( mips_ejtag_t *ejtag_info, int code_len, u32 *code, int nu ctx.code_len = code_len; ctx.ejtag_info = ejtag_info; ctx.stack_offset = 0; - + while (1) { if ((retval = wait_for_pracc_rw(ejtag_info, &ejtag_ctrl)) != ERROR_OK) return retval; - + address = data = 0; - mips_ejtag_set_instr(ejtag_info, EJTAG_INST_ADDRESS, NULL); - mips_ejtag_drscan_32(ejtag_info, &address); - + mips_ejtag_set_instr(ejtag_info, EJTAG_INST_ADDRESS); + retval = mips_ejtag_drscan_32(ejtag_info, &address); + if (retval != ERROR_OK) + return retval; + /* Check for read or write */ if (ejtag_ctrl & EJTAG_CTRL_PRNW) { @@ -191,105 +291,104 @@ int mips32_pracc_exec( mips_ejtag_t *ejtag_info, int code_len, u32 *code, int nu { break; } - + if ((retval = mips32_pracc_exec_read(&ctx, address)) != ERROR_OK) return retval; } - + if (cycle == 0) break; } - + /* stack sanity check */ if (ctx.stack_offset != 0) { LOG_DEBUG("Pracc Stack not zero"); } - + return ERROR_OK; } -int mips32_pracc_read_mem(mips_ejtag_t *ejtag_info, u32 addr, int size, int count, void *buf) +int mips32_pracc_read_mem(struct mips_ejtag *ejtag_info, uint32_t addr, int size, int count, void *buf) { switch (size) { case 1: - return mips32_pracc_read_mem8(ejtag_info, addr, count, (u8*)buf); + return mips32_pracc_read_mem8(ejtag_info, addr, count, (uint8_t*)buf); case 2: - return mips32_pracc_read_mem16(ejtag_info, addr, count, (u16*)buf); + return mips32_pracc_read_mem16(ejtag_info, addr, count, (uint16_t*)buf); case 4: - return mips32_pracc_read_mem32(ejtag_info, addr, count, (u32*)buf); + if (count == 1) + return mips32_pracc_read_u32(ejtag_info, addr, (uint32_t*)buf); + else + return mips32_pracc_read_mem32(ejtag_info, addr, count, (uint32_t*)buf); } - + return ERROR_OK; } -int mips32_pracc_read_mem32(mips_ejtag_t *ejtag_info, u32 addr, int count, u32 *buf) -{ - u32 code[] = { +static int mips32_pracc_read_mem32(struct mips_ejtag *ejtag_info, uint32_t addr, int count, uint32_t *buf) +{ + static const uint32_t code[] = { /* start: */ MIPS32_MTC0(15,31,0), /* move $15 to COP0 DeSave */ - MIPS32_LUI(15,UPPER16(MIPS32_PRACC_STACK)), /* $15 = MIPS32_PRACC_STACK */ + MIPS32_LUI(15,UPPER16(MIPS32_PRACC_STACK)), /* $15 = MIPS32_PRACC_STACK */ MIPS32_ORI(15,15,LOWER16(MIPS32_PRACC_STACK)), - MIPS32_SW(8,0,15), /* sw $8,($15) */ - MIPS32_SW(9,0,15), /* sw $9,($15) */ - MIPS32_SW(10,0,15), /* sw $10,($15) */ - MIPS32_SW(11,0,15), /* sw $11,($15) */ - + MIPS32_SW(8,0,15), /* sw $8,($15) */ + MIPS32_SW(9,0,15), /* sw $9,($15) */ + MIPS32_SW(10,0,15), /* sw $10,($15) */ + MIPS32_SW(11,0,15), /* sw $11,($15) */ + MIPS32_LUI(8,UPPER16(MIPS32_PRACC_PARAM_IN)), /* $8 = MIPS32_PRACC_PARAM_IN */ MIPS32_ORI(8,8,LOWER16(MIPS32_PRACC_PARAM_IN)), - MIPS32_LW(9,0,8), /* $9=mem[$8]; read addr */ - MIPS32_LW(10,4,8), /* $10=mem[$8+4]; read count */ - MIPS32_LUI(11,UPPER16(MIPS32_PRACC_PARAM_OUT)), /* $11=MIPS32_PRACC_PARAM_OUT */ + MIPS32_LW(9,0,8), /* $9 = mem[$8]; read addr */ + MIPS32_LW(10,4,8), /* $10 = mem[$8 + 4]; read count */ + MIPS32_LUI(11,UPPER16(MIPS32_PRACC_PARAM_OUT)), /* $11 = MIPS32_PRACC_PARAM_OUT */ MIPS32_ORI(11,11,LOWER16(MIPS32_PRACC_PARAM_OUT)), - MIPS32_NOP, /* loop: */ - MIPS32_BEQ(0,10,9), /* beq 0, $10, end */ - MIPS32_NOP, - - MIPS32_LW(12,0,9), /* lw $12,0($9), Load $12 with the word @mem[$9] */ - MIPS32_SW(12,0,11), /* sw $12,0($11) */ - - MIPS32_ADDI(10,10,NEG16(1)), /* $10-- */ - MIPS32_ADDI(9,9,4), /* $1+=4 */ - MIPS32_ADDI(11,11,4), /* $11+=4 */ - + MIPS32_BEQ(0,10,8), /* beq 0, $10, end */ MIPS32_NOP, - MIPS32_B(NEG16(9)), /* b loop */ + + MIPS32_LW(8,0,9), /* lw $8,0($9), Load $8 with the word @mem[$9] */ + MIPS32_SW(8,0,11), /* sw $8,0($11) */ + + MIPS32_ADDI(10,10,NEG16(1)), /* $10-- */ + MIPS32_ADDI(9,9,4), /* $1 += 4 */ + MIPS32_ADDI(11,11,4), /* $11 += 4 */ + + MIPS32_B(NEG16(8)), /* b loop */ MIPS32_NOP, /* end: */ - MIPS32_LW(11,0,15), /* sw $11,($15) */ - MIPS32_LW(10,0,15), /* sw $10,($15) */ - MIPS32_LW(9,0,15), /* sw $9,($15) */ - MIPS32_LW(8,0,15), /* sw $8,($15) */ + MIPS32_LW(11,0,15), /* lw $11,($15) */ + MIPS32_LW(10,0,15), /* lw $10,($15) */ + MIPS32_LW(9,0,15), /* lw $9,($15) */ + MIPS32_LW(8,0,15), /* lw $8,($15) */ + MIPS32_B(NEG16(27)), /* b start */ MIPS32_MFC0(15,31,0), /* move COP0 DeSave to $15 */ - MIPS32_NOP, - MIPS32_B(NEG16(31)), /* b start */ - MIPS32_NOP, }; - - int retval=ERROR_OK; + + int retval = ERROR_OK; int blocksize; int bytesread; - u32 param_in[2]; - + uint32_t param_in[2]; + bytesread = 0; - + while (count > 0) - { + { blocksize = count; if (count > 0x400) blocksize = 0x400; - + param_in[0] = addr; param_in[1] = blocksize; - - if ((retval = mips32_pracc_exec(ejtag_info, sizeof(code)/sizeof(code[0]), code, - sizeof(param_in)/sizeof(param_in[0]), param_in, blocksize, &buf[bytesread], 1)) != ERROR_OK) + + if ((retval = mips32_pracc_exec(ejtag_info, ARRAY_SIZE(code), code, + ARRAY_SIZE(param_in), param_in, blocksize, &buf[bytesread], 1)) != ERROR_OK) { return retval; } - + count -= blocksize; addr += blocksize; bytesread += blocksize; @@ -298,489 +397,1002 @@ int mips32_pracc_read_mem32(mips_ejtag_t *ejtag_info, u32 addr, int count, u32 * return retval; } -int mips32_pracc_read_mem16(mips_ejtag_t *ejtag_info, u32 addr, int count, u16 *buf) +static int mips32_pracc_read_u32(struct mips_ejtag *ejtag_info, uint32_t addr, uint32_t *buf) +{ + static const uint32_t code[] = { + /* start: */ + MIPS32_MTC0(15,31,0), /* move $15 to COP0 DeSave */ + MIPS32_LUI(15,UPPER16(MIPS32_PRACC_STACK)), /* $15 = MIPS32_PRACC_STACK */ + MIPS32_ORI(15,15,LOWER16(MIPS32_PRACC_STACK)), + MIPS32_SW(8,0,15), /* sw $8,($15) */ + + MIPS32_LW(8,NEG16(MIPS32_PRACC_STACK-MIPS32_PRACC_PARAM_IN),15), /* load R8 @ param_in[0] = address */ + + MIPS32_LW(8,0,8), /* lw $8,0($8), Load $8 with the word @mem[$8] */ + MIPS32_SW(8,NEG16(MIPS32_PRACC_STACK-MIPS32_PRACC_PARAM_OUT),15), /* store R8 @ param_out[0] */ + + MIPS32_LW(8,0,15), /* lw $8,($15) */ + MIPS32_B(NEG16(9)), /* b start */ + MIPS32_MFC0(15,31,0), /* move COP0 DeSave to $15 */ + }; + + int retval = ERROR_OK; + uint32_t param_in[1]; + + param_in[0] = addr; + + if ((retval = mips32_pracc_exec(ejtag_info, ARRAY_SIZE(code), code, + ARRAY_SIZE(param_in), param_in, 1, buf, 1)) != ERROR_OK) + { + return retval; + } + + return retval; +} + +static int mips32_pracc_read_mem16(struct mips_ejtag *ejtag_info, uint32_t addr, int count, uint16_t *buf) { - u32 code[] = { + static const uint32_t code[] = { /* start: */ MIPS32_MTC0(15,31,0), /* move $15 to COP0 DeSave */ - MIPS32_LUI(15,UPPER16(MIPS32_PRACC_STACK)), /* $15 = MIPS32_PRACC_STACK */ + MIPS32_LUI(15,UPPER16(MIPS32_PRACC_STACK)), /* $15 = MIPS32_PRACC_STACK */ MIPS32_ORI(15,15,LOWER16(MIPS32_PRACC_STACK)), - MIPS32_SW(8,0,15), /* sw $8,($15) */ - MIPS32_SW(9,0,15), /* sw $9,($15) */ - MIPS32_SW(10,0,15), /* sw $10,($15) */ - MIPS32_SW(11,0,15), /* sw $11,($15) */ - + MIPS32_SW(8,0,15), /* sw $8,($15) */ + MIPS32_SW(9,0,15), /* sw $9,($15) */ + MIPS32_SW(10,0,15), /* sw $10,($15) */ + MIPS32_SW(11,0,15), /* sw $11,($15) */ + MIPS32_LUI(8,UPPER16(MIPS32_PRACC_PARAM_IN)), /* $8 = MIPS32_PRACC_PARAM_IN */ MIPS32_ORI(8,8,LOWER16(MIPS32_PRACC_PARAM_IN)), - MIPS32_LW(9,0,8), /* $9=mem[$8]; read addr */ - MIPS32_LW(10,4,8), /* $10=mem[$8+4]; read count */ - MIPS32_LUI(11,UPPER16(MIPS32_PRACC_PARAM_OUT)), /* $11=MIPS32_PRACC_PARAM_OUT */ + MIPS32_LW(9,0,8), /* $9 = mem[$8]; read addr */ + MIPS32_LW(10,4,8), /* $10 = mem[$8 + 4]; read count */ + MIPS32_LUI(11,UPPER16(MIPS32_PRACC_PARAM_OUT)), /* $11 = MIPS32_PRACC_PARAM_OUT */ MIPS32_ORI(11,11,LOWER16(MIPS32_PRACC_PARAM_OUT)), - MIPS32_NOP, /* loop: */ - MIPS32_BEQ(0,10,9), /* beq 0, $10, end */ - MIPS32_NOP, - - MIPS32_LHU(12,0,9), /* lw $12,0($9), Load $12 with the halfword @mem[$9] */ - MIPS32_SW(12,0,11), /* sw $12,0($11) */ - - MIPS32_ADDI(10,10,NEG16(1)), /* $10-- */ - MIPS32_ADDI(9,9,2), /* $9+=2 */ - MIPS32_ADDI(11,11,4), /* $11+=4 */ - MIPS32_NOP, - MIPS32_B(NEG16(9)), /* b loop */ + MIPS32_BEQ(0,10,8), /* beq 0, $10, end */ MIPS32_NOP, - MIPS32_LW(11,0,15), /* sw $11,($15) */ - MIPS32_LW(10,0,15), /* sw $10,($15) */ - MIPS32_LW(9,0,15), /* sw $9,($15) */ - MIPS32_LW(8,0,15), /* sw $8,($15) */ - MIPS32_MFC0(15,31,0), /* move COP0 DeSave to $15 */ - MIPS32_NOP, - MIPS32_B(NEG16(31)), /* b start */ + MIPS32_LHU(8,0,9), /* lw $8,0($9), Load $8 with the halfword @mem[$9] */ + MIPS32_SW(8,0,11), /* sw $8,0($11) */ + + MIPS32_ADDI(10,10,NEG16(1)), /* $10-- */ + MIPS32_ADDI(9,9,2), /* $9 += 2 */ + MIPS32_ADDI(11,11,4), /* $11 += 4 */ + MIPS32_B(NEG16(8)), /* b loop */ MIPS32_NOP, + /* end: */ + MIPS32_LW(11,0,15), /* lw $11,($15) */ + MIPS32_LW(10,0,15), /* lw $10,($15) */ + MIPS32_LW(9,0,15), /* lw $9,($15) */ + MIPS32_LW(8,0,15), /* lw $8,($15) */ + MIPS32_B(NEG16(27)), /* b start */ + MIPS32_MFC0(15,30,0), /* move COP0 DeSave to $15 */ }; -// /* TODO remove array */ - u32 param_out[count]; + /* TODO remove array */ + uint32_t *param_out = malloc(count * sizeof(uint32_t)); int i; - -// int retval; + + int retval = ERROR_OK; int blocksize; - int bytesread; - u32 param_in[2]; - - bytesread = 0; - + uint32_t param_in[2]; + //while (count > 0) - { + { blocksize = count; if (count > 0x400) blocksize = 0x400; - + param_in[0] = addr; param_in[1] = blocksize; - - mips32_pracc_exec(ejtag_info, sizeof(code)/sizeof(code[0]), code, \ - sizeof(param_in)/sizeof(param_in[0]), param_in, count, param_out, 1); - + + retval = mips32_pracc_exec(ejtag_info, ARRAY_SIZE(code), code, + ARRAY_SIZE(param_in), param_in, count, param_out, 1); + // count -= blocksize; // addr += blocksize; -// bytesread += blocksize; } - + for (i = 0; i < count; i++) { buf[i] = param_out[i]; } - - return ERROR_OK; + + free(param_out); + + return retval; } -int mips32_pracc_read_mem8(mips_ejtag_t *ejtag_info, u32 addr, int count, u8 *buf) +static int mips32_pracc_read_mem8(struct mips_ejtag *ejtag_info, uint32_t addr, int count, uint8_t *buf) { - u32 code[] = { + static const uint32_t code[] = { /* start: */ MIPS32_MTC0(15,31,0), /* move $15 to COP0 DeSave */ - MIPS32_LUI(15,UPPER16(MIPS32_PRACC_STACK)), /* $15 = MIPS32_PRACC_STACK */ + MIPS32_LUI(15,UPPER16(MIPS32_PRACC_STACK)), /* $15 = MIPS32_PRACC_STACK */ MIPS32_ORI(15,15,LOWER16(MIPS32_PRACC_STACK)), - MIPS32_SW(8,0,15), /* sw $8,($15) */ - MIPS32_SW(9,0,15), /* sw $9,($15) */ - MIPS32_SW(10,0,15), /* sw $10,($15) */ - MIPS32_SW(11,0,15), /* sw $11,($15) */ - - MIPS32_LUI(8,UPPER16(MIPS32_PRACC_PARAM_IN)), /* $8 = MIPS32_PRACC_PARAM_IN */ + MIPS32_SW(8,0,15), /* sw $8,($15) */ + MIPS32_SW(9,0,15), /* sw $9,($15) */ + MIPS32_SW(10,0,15), /* sw $10,($15) */ + MIPS32_SW(11,0,15), /* sw $11,($15) */ + + MIPS32_LUI(8,UPPER16(MIPS32_PRACC_PARAM_IN)), /* $8 = MIPS32_PRACC_PARAM_IN */ MIPS32_ORI(8,8,LOWER16(MIPS32_PRACC_PARAM_IN)), - MIPS32_LW(9,0,8), /* $9=mem[$8]; read addr */ - MIPS32_LW(10,4,8), /* $10=mem[$8+4]; read count */ - MIPS32_LUI(11,UPPER16(MIPS32_PRACC_PARAM_OUT)), /* $11=MIPS32_PRACC_PARAM_OUT */ + MIPS32_LW(9,0,8), /* $9 = mem[$8]; read addr */ + MIPS32_LW(10,4,8), /* $10 = mem[$8 + 4]; read count */ + MIPS32_LUI(11,UPPER16(MIPS32_PRACC_PARAM_OUT)), /* $11 = MIPS32_PRACC_PARAM_OUT */ MIPS32_ORI(11,11,LOWER16(MIPS32_PRACC_PARAM_OUT)), - MIPS32_NOP, /* loop: */ - MIPS32_BEQ(0,10,9), /* beq 0, $10, end */ - MIPS32_NOP, - - MIPS32_LBU(12,0,9), /* lw $12,0($9), Load t4 with the byte @mem[t1] */ - MIPS32_SW(12,0,11), /* sw $12,0($11) */ - - MIPS32_ADDI(10,10,NEG16(1)), /* $10-- */ - MIPS32_ADDI(9,9,1), /* $9+=1 */ - MIPS32_ADDI(11,11,4), /* $11+=4 */ + MIPS32_BEQ(0,10,8), /* beq 0, $10, end */ MIPS32_NOP, - MIPS32_B(NEG16(9)), /* b loop */ + + MIPS32_LBU(8,0,9), /* lw $8,0($9), Load t4 with the byte @mem[t1] */ + MIPS32_SW(8,0,11), /* sw $8,0($11) */ + + MIPS32_ADDI(10,10,NEG16(1)), /* $10-- */ + MIPS32_ADDI(9,9,1), /* $9 += 1 */ + MIPS32_ADDI(11,11,4), /* $11 += 4 */ + MIPS32_B(NEG16(8)), /* b loop */ MIPS32_NOP, /* end: */ - MIPS32_LW(11,0,15), /* sw $11,($15) */ - MIPS32_LW(10,0,15), /* sw $10,($15) */ - MIPS32_LW(9,0,15), /* sw $9,($15) */ - MIPS32_LW(8,0,15), /* sw $8,($15) */ + MIPS32_LW(11,0,15), /* lw $11,($15) */ + MIPS32_LW(10,0,15), /* lw $10,($15) */ + MIPS32_LW(9,0,15), /* lw $9,($15) */ + MIPS32_LW(8,0,15), /* lw $8,($15) */ + MIPS32_B(NEG16(27)), /* b start */ MIPS32_MFC0(15,31,0), /* move COP0 DeSave to $15 */ - MIPS32_NOP, - MIPS32_B(NEG16(31)), /* b start */ - MIPS32_NOP, }; - -// /* TODO remove array */ - u32 param_out[count]; + + /* TODO remove array */ + uint32_t *param_out = malloc(count * sizeof(uint32_t)); int i; - -// int retval; + + int retval = ERROR_OK; int blocksize; - int bytesread; - u32 param_in[2]; - - bytesread = 0; - + uint32_t param_in[2]; + // while (count > 0) - { + { blocksize = count; if (count > 0x400) blocksize = 0x400; - + param_in[0] = addr; param_in[1] = blocksize; - - mips32_pracc_exec(ejtag_info, sizeof(code)/sizeof(code[0]), code, \ - sizeof(param_in)/sizeof(param_in[0]), param_in, count, param_out, 1); - + + retval = mips32_pracc_exec(ejtag_info, ARRAY_SIZE(code), code, + ARRAY_SIZE(param_in), param_in, count, param_out, 1); + // count -= blocksize; // addr += blocksize; -// bytesread += blocksize; } - + for (i = 0; i < count; i++) { buf[i] = param_out[i]; } - return ERROR_OK; + free(param_out); + + return retval; +} + +int mips32_cp0_read(struct mips_ejtag *ejtag_info, uint32_t *val, uint32_t cp0_reg, uint32_t cp0_sel) +{ + /** + * Do not make this code static, but regenerate it every time, + * as 5th element has to be changed to add parameters + */ + uint32_t code[] = { + /* start: */ + MIPS32_MTC0(15,31,0), /* move $15 to COP0 DeSave */ + MIPS32_LUI(15,UPPER16(MIPS32_PRACC_STACK)), /* $15 = MIPS32_PRACC_STACK */ + MIPS32_ORI(15,15,LOWER16(MIPS32_PRACC_STACK)), + MIPS32_SW(8,0,15), /* sw $8,($15) */ + MIPS32_SW(9,0,15), /* sw $9,($15) */ + + /* 5 */ MIPS32_MFC0(8,0,0), /* move COP0 [cp0_reg select] to $8 */ + + MIPS32_LUI(9,UPPER16(MIPS32_PRACC_PARAM_OUT)), /* $11 = MIPS32_PRACC_PARAM_OUT */ + MIPS32_ORI(9,9,LOWER16(MIPS32_PRACC_PARAM_OUT)), + MIPS32_SW(8,0,9), /* sw $8,0($9) */ + + MIPS32_LW(9,0,15), /* lw $9,($15) */ + MIPS32_LW(8,0,15), /* lw $8,($15) */ + MIPS32_B(NEG16(12)), /* b start */ + MIPS32_MFC0(15,31,0), /* move COP0 DeSave to $15 */ + }; + + /** + * Note that our input parametes cp0_reg and cp0_sel + * are numbers (not gprs) which make part of mfc0 instruction opcode. + * + * These are not fix, but can be different for each mips32_cp0_read() function call, + * and that is why we must insert them directly into opcode, + * i.e. we can not pass it on EJTAG microprogram stack (via param_in), + * and put them into the gprs later from MIPS32_PRACC_STACK + * because mfc0 do not use gpr as a parameter for the cp0_reg and select part, + * but plain (immediate) number. + * + * MIPS32_MTC0 is implemented via MIPS32_R_INST macro. + * In order to insert our parameters, we must change rd and funct fields. + */ + code[5] |= (cp0_reg << 11) | cp0_sel; /* change rd and funct of MIPS32_R_INST macro */ + + /* TODO remove array */ + uint32_t *param_out = val; + int retval; + + retval = mips32_pracc_exec(ejtag_info, ARRAY_SIZE(code), code, 0, NULL, 1, param_out, 1); + + return retval; +} + +int mips32_cp0_write(struct mips_ejtag *ejtag_info, + uint32_t val, uint32_t cp0_reg, uint32_t cp0_sel) +{ + uint32_t code[] = { + /* start: */ + MIPS32_MTC0(15,31,0), /* move $15 to COP0 DeSave */ + MIPS32_LUI(15,UPPER16(MIPS32_PRACC_STACK)), /* $15 = MIPS32_PRACC_STACK */ + MIPS32_ORI(15,15,LOWER16(MIPS32_PRACC_STACK)), + MIPS32_SW(8,0,15), /* sw $8,($15) */ + MIPS32_SW(9,0,15), /* sw $9,($15) */ + + MIPS32_LUI(8,UPPER16(MIPS32_PRACC_PARAM_IN)), /* $8 = MIPS32_PRACC_PARAM_IN */ + MIPS32_ORI(8,8,LOWER16(MIPS32_PRACC_PARAM_IN)), + MIPS32_LW(9,0,8), /* Load write val to $9 */ + + /* 8 */ MIPS32_MTC0(9,0,0), /* move $9 to COP0 [cp0_reg select] */ + + MIPS32_LW(9,0,15), /* lw $9,($15) */ + MIPS32_LW(8,0,15), /* lw $8,($15) */ + MIPS32_B(NEG16(12)), /* b start */ + MIPS32_MFC0(15,31,0), /* move COP0 DeSave to $15 */ + }; + + /** + * Note that MIPS32_MTC0 macro is implemented via MIPS32_R_INST macro. + * In order to insert our parameters, we must change rd and funct fields. + */ + code[8] |= (cp0_reg << 11) | cp0_sel; /* change rd and funct fields of MIPS32_R_INST macro */ + + /* TODO remove array */ + uint32_t *param_in = malloc(1 * sizeof(uint32_t)); + int retval; + param_in[0] = val; + + retval = mips32_pracc_exec(ejtag_info, ARRAY_SIZE(code), code, 1, param_in, 0, NULL, 1); + + free(param_in); + + return retval; +} + +/** + * \b mips32_pracc_sync_cache + * + * Synchronize Caches to Make Instruction Writes Effective + * (ref. doc. MIPS32 Architecture For Programmers Volume II: The MIPS32 Instruction Set, + * Document Number: MD00086, Revision 2.00, June 9, 2003) + * + * When the instruction stream is written, the SYNCI instruction should be used + * in conjunction with other instructions to make the newly-written instructions effective. + * + * Explanation : + * A program that loads another program into memory is actually writing the D- side cache. + * The instructions it has loaded can't be executed until they reach the I-cache. + * + * After the instructions have been written, the loader should arrange + * to write back any containing D-cache line and invalidate any locations + * already in the I-cache. + * + * You can do that with cache instructions, but those instructions are only available in kernel mode, + * and a loader writing instructions for the use of its own process need not be privileged software. + * + * In the latest MIPS32/64 CPUs, MIPS provides the synci instruction, + * which does the whole job for a cache-line-sized chunk of the memory you just loaded: + * That is, it arranges a D-cache write-back and an I-cache invalidate. + * + * To employ synci at user level, you need to know the size of a cache line, + * and that can be obtained with a rdhwr SYNCI_Step + * from one of the standard “hardware registers”. + */ +static int mips32_pracc_sync_cache(struct mips_ejtag *ejtag_info, + uint32_t start_addr, uint32_t end_addr) +{ + static const uint32_t code[] = { + /* start: */ + MIPS32_MTC0(15,31,0), /* move $15 to COP0 DeSave */ + MIPS32_LUI(15,UPPER16(MIPS32_PRACC_STACK)), /* $15 = MIPS32_PRACC_STACK */ + MIPS32_ORI(15,15,LOWER16(MIPS32_PRACC_STACK)), + MIPS32_SW(8,0,15), /* sw $8,($15) */ + MIPS32_SW(9,0,15), /* sw $9,($15) */ + MIPS32_SW(10,0,15), /* sw $10,($15) */ + MIPS32_SW(11,0,15), /* sw $11,($15) */ + + MIPS32_LUI(8,UPPER16(MIPS32_PRACC_PARAM_IN)), /* $8 = MIPS32_PRACC_PARAM_IN */ + MIPS32_ORI(8,8,LOWER16(MIPS32_PRACC_PARAM_IN)), + MIPS32_LW(9,0,8), /* Load write start_addr to $9 */ + MIPS32_LW(10,4,8), /* Load write end_addr to $10 */ + + MIPS32_RDHWR(11, MIPS32_SYNCI_STEP), /* $11 = MIPS32_SYNCI_STEP */ + MIPS32_BEQ(11,0,6), /* beq $11, $0, end */ + MIPS32_NOP, + /* synci_loop : */ + MIPS32_SYNCI(0,9), /* synci 0($9) */ + MIPS32_SLTU(8,10,9), /* sltu $8, $10, $9 # $8 = $10 < $9 ? 1 : 0 */ + MIPS32_BNE(8,0,NEG16(3)), /* bne $8, $0, synci_loop */ + MIPS32_ADDU(9, 9, 11), /* $9 += MIPS32_SYNCI_STEP */ + MIPS32_SYNC, + /* end: */ + MIPS32_LW(11,0,15), /* lw $11,($15) */ + MIPS32_LW(10,0,15), /* lw $10,($15) */ + MIPS32_LW(9,0,15), /* lw $9,($15) */ + MIPS32_LW(8,0,15), /* lw $8,($15) */ + MIPS32_B(NEG16(24)), /* b start */ + MIPS32_MFC0(15,31,0), /* move COP0 DeSave to $15 */ + }; + + /* TODO remove array */ + uint32_t *param_in = malloc(2 * sizeof(uint32_t)); + int retval; + param_in[0] = start_addr; + param_in[1] = end_addr; + + retval = mips32_pracc_exec(ejtag_info, ARRAY_SIZE(code), code, 2, param_in, 0, NULL, 1); + + free(param_in); + + return retval; } -int mips32_pracc_write_mem(mips_ejtag_t *ejtag_info, u32 addr, int size, int count, void *buf) +/** + * \b mips32_pracc_clean_invalidate_cache + * + * Writeback D$ and Invalidate I$ + * so that the instructions written can be visible to CPU + */ +static int mips32_pracc_clean_invalidate_cache(struct mips_ejtag *ejtag_info, + uint32_t start_addr, uint32_t end_addr) { + static const uint32_t code[] = { + /* start: */ + MIPS32_MTC0(15,31,0), /* move $15 to COP0 DeSave */ + MIPS32_LUI(15,UPPER16(MIPS32_PRACC_STACK)), /* $15 = MIPS32_PRACC_STACK */ + MIPS32_ORI(15,15,LOWER16(MIPS32_PRACC_STACK)), + MIPS32_SW(8,0,15), /* sw $8,($15) */ + MIPS32_SW(9,0,15), /* sw $9,($15) */ + MIPS32_SW(10,0,15), /* sw $10,($15) */ + MIPS32_SW(11,0,15), /* sw $11,($15) */ + + MIPS32_LUI(8,UPPER16(MIPS32_PRACC_PARAM_IN)), /* $8 = MIPS32_PRACC_PARAM_IN */ + MIPS32_ORI(8,8,LOWER16(MIPS32_PRACC_PARAM_IN)), + MIPS32_LW(9,0,8), /* Load write start_addr to $9 */ + MIPS32_LW(10,4,8), /* Load write end_addr to $10 */ + MIPS32_LW(11,8,8), /* Load write clsiz to $11 */ + + /* cache_loop: */ + MIPS32_SLTU(8,10,9), /* sltu $8, $10, $9 : $8 <- $10 < $9 ? */ + MIPS32_BGTZ(8,6), /* bgtz $8, end */ + MIPS32_NOP, + + MIPS32_CACHE(MIPS32_CACHE_D_HIT_WRITEBACK,0,9), /* cache Hit_Writeback_D, 0($9) */ + MIPS32_CACHE(MIPS32_CACHE_I_HIT_INVALIDATE,0,9), /* cache Hit_Invalidate_I, 0($9) */ + + MIPS32_ADDU(9,9,11), /* $9 += $11 */ + + MIPS32_B(NEG16(7)), /* b cache_loop */ + MIPS32_NOP, + /* end: */ + MIPS32_LW(11,0,15), /* lw $11,($15) */ + MIPS32_LW(10,0,15), /* lw $10,($15) */ + MIPS32_LW(9,0,15), /* lw $9,($15) */ + MIPS32_LW(8,0,15), /* lw $8,($15) */ + MIPS32_B(NEG16(25)), /* b start */ + MIPS32_MFC0(15,31,0), /* move COP0 DeSave to $15 */ + }; + + /** + * Find cache line size in bytes + */ + uint32_t conf; + uint32_t dl, clsiz; + + mips32_cp0_read(ejtag_info, &conf, 16, 1); + dl = (conf & MIPS32_CONFIG1_DL_MASK) >> MIPS32_CONFIG1_DL_SHIFT; + + /* dl encoding : dl=1 => 4 bytes, dl=2 => 8 bytes, etc... */ + clsiz = 0x2 << dl; + + /* TODO remove array */ + uint32_t *param_in = malloc(3 * sizeof(uint32_t)); + int retval; + param_in[0] = start_addr; + param_in[1] = end_addr; + param_in[2] = clsiz; + + retval = mips32_pracc_exec(ejtag_info, ARRAY_SIZE(code), code, 3, param_in, 0, NULL, 1); + + free(param_in); + + return retval; +} + + +int mips32_pracc_write_mem(struct mips_ejtag *ejtag_info, uint32_t addr, int size, int count, void *buf) +{ + int retval; + switch (size) { case 1: - return mips32_pracc_write_mem8(ejtag_info, addr, count, (u8*)buf); + retval = mips32_pracc_write_mem8(ejtag_info, addr, count, (uint8_t*)buf); + break; case 2: - return mips32_pracc_write_mem16(ejtag_info, addr, count,(u16*)buf); + retval = mips32_pracc_write_mem16(ejtag_info, addr, count,(uint16_t*)buf); + break; case 4: - return mips32_pracc_write_mem32(ejtag_info, addr, count, (u32*)buf); + if (count == 1) + { + retval = mips32_pracc_write_u32(ejtag_info, addr, (uint32_t*)buf); + } + else + { + retval = mips32_pracc_write_mem32(ejtag_info, addr, count, (uint32_t*)buf); + } + break; + default: + retval = ERROR_FAIL; } - - return ERROR_OK; + + /** + * If we are in the cachable regoion and cache is activated, + * we must clean D$ + invalidate I$ after we did the write, + * so that changes do not continue to live only in D$, but to be + * replicated in I$ also (maybe we wrote the istructions) + */ + uint32_t conf = 0; + int cached = 0; + + mips32_cp0_read(ejtag_info, &conf, 16, 0); + + switch (KSEGX(addr)) + { + case KUSEG: + cached = (conf & MIPS32_CONFIG0_KU_MASK) >> MIPS32_CONFIG0_KU_SHIFT; + break; + case KSEG0 : + cached = (conf & MIPS32_CONFIG0_K0_MASK) >> MIPS32_CONFIG0_K0_SHIFT; + break; + case KSEG1: + /* uncachable segment - nothing to do */ + break; + case KSEG2: + case KSEG3: + cached = (conf & MIPS32_CONFIG0_K23_MASK) >> MIPS32_CONFIG0_K23_SHIFT; + break; + default: + /* what ? */ + break; + } + + /** + * Check cachablitiy bits coherency algorithm - + * is the region cacheable or uncached. + * If cacheable we have to synchronize the cache + */ + if (cached == 0x3) + { + uint32_t start_addr, end_addr; + uint32_t rel; + + start_addr = addr; + end_addr = addr + count * size; + + /** select cache synchronisation mechanism based on Architecture Release */ + rel = (conf & MIPS32_CONFIG0_AR_MASK) >> MIPS32_CONFIG0_AR_SHIFT; + switch (rel) + { + case MIPS32_ARCH_REL1 : + /* MIPS32/64 Release 1 - we must use cache instruction */ + mips32_pracc_clean_invalidate_cache(ejtag_info, start_addr, end_addr); + break; + case MIPS32_ARCH_REL2 : + /* MIPS32/64 Release 2 - we can use synci instruction */ + mips32_pracc_sync_cache(ejtag_info, start_addr, end_addr); + break; + default : + /* what ? */ + break; + } + } + + return retval; } -int mips32_pracc_write_mem32(mips_ejtag_t *ejtag_info, u32 addr, int count, u32 *buf) +static int mips32_pracc_write_mem32(struct mips_ejtag *ejtag_info, uint32_t addr, int count, uint32_t *buf) { - u32 code[] = { + static const uint32_t code[] = { /* start: */ MIPS32_MTC0(15,31,0), /* move $15 to COP0 DeSave */ - MIPS32_LUI(15,UPPER16(MIPS32_PRACC_STACK)), /* $15 = MIPS32_PRACC_STACK */ + MIPS32_LUI(15,UPPER16(MIPS32_PRACC_STACK)), /* $15 = MIPS32_PRACC_STACK */ MIPS32_ORI(15,15,LOWER16(MIPS32_PRACC_STACK)), - MIPS32_SW(8,0,15), /* sw $8,($15) */ - MIPS32_SW(9,0,15), /* sw $9,($15) */ - MIPS32_SW(10,0,15), /* sw $10,($15) */ - MIPS32_SW(11,0,15), /* sw $11,($15) */ - - MIPS32_LUI(8,UPPER16(MIPS32_PRACC_PARAM_IN)), /* $8 = MIPS32_PRACC_PARAM_IN */ - MIPS32_ORI(8,8,LOWER16(MIPS32_PRACC_PARAM_IN)), - MIPS32_LW(9,0,8), /* Load write addr to $9 */ - MIPS32_LW(10,4,8), /* Load write count to $10 */ - MIPS32_ADDI(8,8,8), /* $8+=8 */ - MIPS32_NOP, + MIPS32_SW(8,0,15), /* sw $8,($15) */ + MIPS32_SW(9,0,15), /* sw $9,($15) */ + MIPS32_SW(10,0,15), /* sw $10,($15) */ + MIPS32_SW(11,0,15), /* sw $11,($15) */ + + MIPS32_ADDI(8,15,NEG16(MIPS32_PRACC_STACK-MIPS32_PRACC_PARAM_IN)), /* $8= MIPS32_PRACC_PARAM_IN */ + MIPS32_LW(9,0,8), /* Load write addr to $9 */ + MIPS32_LW(10,4,8), /* Load write count to $10 */ + MIPS32_ADDI(8,8,8), /* $8 += 8 beginning of data */ + /* loop: */ - MIPS32_BEQ(0,10,9), /* beq $0, $10, end */ - MIPS32_NOP, - - MIPS32_LW(11,0,8), /* lw $11,0($8), Load $11 with the word @mem[$8] */ - MIPS32_SW(11,0,9), /* sw $11,0($9) */ - - MIPS32_ADDI(10,10,NEG16(1)), /* $10-- */ - MIPS32_ADDI(9,9,4), /* $9+=4 */ - MIPS32_ADDI(8,8,4), /* $8+=4 */ - MIPS32_NOP, - MIPS32_B(NEG16(9)), /* b loop */ - MIPS32_NOP, + MIPS32_LW(11,0,8), /* lw $11,0($8), Load $11 with the word @mem[$8] */ + MIPS32_SW(11,0,9), /* sw $11,0($9) */ + + MIPS32_ADDI(9,9,4), /* $9 += 4 */ + MIPS32_BNE(10,9,NEG16(4)), /* bne $10, $9, loop */ + MIPS32_ADDI(8,8,4), /* $8 += 4 */ + /* end: */ - MIPS32_LW(11,0,15), /* sw $11,($15) */ - MIPS32_LW(10,0,15), /* sw $10,($15) */ - MIPS32_LW(9,0,15), /* sw $9,($15) */ - MIPS32_LW(8,0,15), /* sw $8,($15) */ + MIPS32_LW(11,0,15), /* lw $11,($15) */ + MIPS32_LW(10,0,15), /* lw $10,($15) */ + MIPS32_LW(9,0,15), /* lw $9,($15) */ + MIPS32_LW(8,0,15), /* lw $8,($15) */ + MIPS32_B(NEG16(21)), /* b start */ MIPS32_MFC0(15,31,0), /* move COP0 DeSave to $15 */ - MIPS32_NOP, - MIPS32_B(NEG16(30)), /* b start */ - MIPS32_NOP, }; - + /* TODO remove array */ - u32 param_in[count+2]; + uint32_t *param_in = malloc((count + 2) * sizeof(uint32_t)); param_in[0] = addr; - param_in[1] = count; - - memcpy(¶m_in[2], buf, count * sizeof(u32)); - - mips32_pracc_exec(ejtag_info, sizeof(code)/sizeof(code[0]), code, \ - sizeof(param_in)/sizeof(param_in[0]),param_in, 0, NULL, 1); + param_in[1] = addr + (count * sizeof(uint32_t)); /* last address */ - return ERROR_OK; + memcpy(¶m_in[2], buf, count * sizeof(uint32_t)); + + int retval; + retval = mips32_pracc_exec(ejtag_info, ARRAY_SIZE(code), code, + count + 2, param_in, 0, NULL, 1); + + free(param_in); + + return retval; +} + +static int mips32_pracc_write_u32(struct mips_ejtag *ejtag_info, uint32_t addr, uint32_t *buf) +{ + static const uint32_t code[] = { + /* start: */ + MIPS32_MTC0(15,31,0), /* move $15 to COP0 DeSave */ + MIPS32_LUI(15,UPPER16(MIPS32_PRACC_STACK)), /* $15 = MIPS32_PRACC_STACK */ + MIPS32_ORI(15,15,LOWER16(MIPS32_PRACC_STACK)), + MIPS32_SW(8,0,15), /* sw $8,($15) */ + MIPS32_SW(9,0,15), /* sw $9,($15) */ + + MIPS32_LW(8,NEG16((MIPS32_PRACC_STACK-MIPS32_PRACC_PARAM_IN)-4), 15), /* load R8 @ param_in[1] = data */ + MIPS32_LW(9,NEG16(MIPS32_PRACC_STACK-MIPS32_PRACC_PARAM_IN), 15), /* load R9 @ param_in[0] = address */ + + MIPS32_SW(8,0,9), /* sw $8,0($9) */ + + MIPS32_LW(9,0,15), /* lw $9,($15) */ + MIPS32_LW(8,0,15), /* lw $8,($15) */ + MIPS32_B(NEG16(11)), /* b start */ + MIPS32_MFC0(15,31,0), /* move COP0 DeSave to $15 */ + }; + + /* TODO remove array */ + uint32_t param_in[1 + 1]; + param_in[0] = addr; + param_in[1] = *buf; + + return mips32_pracc_exec(ejtag_info, ARRAY_SIZE(code), code, + ARRAY_SIZE(param_in), param_in, 0, NULL, 1); } -int mips32_pracc_write_mem16(mips_ejtag_t *ejtag_info, u32 addr, int count, u16 *buf) +static int mips32_pracc_write_mem16(struct mips_ejtag *ejtag_info, uint32_t addr, int count, uint16_t *buf) { - u32 code[] = { + static const uint32_t code[] = { /* start: */ MIPS32_MTC0(15,31,0), /* move $15 to COP0 DeSave */ - MIPS32_LUI(15,UPPER16(MIPS32_PRACC_STACK)), /* $15 = MIPS32_PRACC_STACK */ + MIPS32_LUI(15,UPPER16(MIPS32_PRACC_STACK)), /* $15 = MIPS32_PRACC_STACK */ MIPS32_ORI(15,15,LOWER16(MIPS32_PRACC_STACK)), - MIPS32_SW(8,0,15), /* sw $8,($15) */ - MIPS32_SW(9,0,15), /* sw $9,($15) */ - MIPS32_SW(10,0,15), /* sw $10,($15) */ - MIPS32_SW(11,0,15), /* sw $11,($15) */ - - MIPS32_LUI(8,UPPER16(MIPS32_PRACC_PARAM_IN)), /* $8 = MIPS32_PRACC_PARAM_IN */ + MIPS32_SW(8,0,15), /* sw $8,($15) */ + MIPS32_SW(9,0,15), /* sw $9,($15) */ + MIPS32_SW(10,0,15), /* sw $10,($15) */ + MIPS32_SW(11,0,15), /* sw $11,($15) */ + + MIPS32_LUI(8,UPPER16(MIPS32_PRACC_PARAM_IN)), /* $8 = MIPS32_PRACC_PARAM_IN */ MIPS32_ORI(8,8,LOWER16(MIPS32_PRACC_PARAM_IN)), - MIPS32_LW(9,0,8), /* Load write addr to $9 */ - MIPS32_LW(10,4,8), /* Load write count to $10 */ - MIPS32_ADDI(8,8,8), /* $8+=8 */ - MIPS32_NOP, + MIPS32_LW(9,0,8), /* Load write addr to $9 */ + MIPS32_LW(10,4,8), /* Load write count to $10 */ + MIPS32_ADDI(8,8,8), /* $8 += 8 */ /* loop: */ - MIPS32_BEQ(0,10,9), /* beq $0, $10, end */ - MIPS32_NOP, - - MIPS32_LW(11,0,8), /* lw $11,0($8), Load $11 with the word @mem[$8] */ - MIPS32_SH(11,0,9), /* sh $11,0($9) */ - - MIPS32_ADDI(10,10,NEG16(1)), /* $10-- */ - MIPS32_ADDI(9,9,2), /* $9+=2 */ - MIPS32_ADDI(8,8,4), /* $8+=4 */ - + MIPS32_BEQ(0,10,8), /* beq $0, $10, end */ MIPS32_NOP, - MIPS32_B(NEG16(9)), /* b loop */ + + MIPS32_LW(11,0,8), /* lw $11,0($8), Load $11 with the word @mem[$8] */ + MIPS32_SH(11,0,9), /* sh $11,0($9) */ + + MIPS32_ADDI(10,10,NEG16(1)), /* $10-- */ + MIPS32_ADDI(9,9,2), /* $9 += 2 */ + MIPS32_ADDI(8,8,4), /* $8 += 4 */ + + MIPS32_B(NEG16(8)), /* b loop */ MIPS32_NOP, /* end: */ - MIPS32_LW(11,0,15), /* sw $11,($15) */ - MIPS32_LW(10,0,15), /* sw $10,($15) */ - MIPS32_LW(9,0,15), /* sw $9,($15) */ - MIPS32_LW(8,0,15), /* sw $8,($15) */ + MIPS32_LW(11,0,15), /* lw $11,($15) */ + MIPS32_LW(10,0,15), /* lw $10,($15) */ + MIPS32_LW(9,0,15), /* lw $9,($15) */ + MIPS32_LW(8,0,15), /* lw $8,($15) */ + MIPS32_B(NEG16(26)), /* b start */ MIPS32_MFC0(15,31,0), /* move COP0 DeSave to $15 */ - MIPS32_NOP, - MIPS32_B(NEG16(30)), /* b start */ - MIPS32_NOP, }; - + /* TODO remove array */ - u32 param_in[count+2]; + uint32_t *param_in = malloc((count + 2) * sizeof(uint32_t)); int i; param_in[0] = addr; param_in[1] = count; - + for (i = 0; i < count; i++) { - param_in[i+2] = buf[i]; + param_in[i + 2] = buf[i]; } - - mips32_pracc_exec(ejtag_info, sizeof(code)/sizeof(code[0]), code, \ - sizeof(param_in)/sizeof(param_in[0]), param_in, 0, NULL, 1); - return ERROR_OK; + int retval; + retval = mips32_pracc_exec(ejtag_info, ARRAY_SIZE(code), code, + count + 2, param_in, 0, NULL, 1); + + free(param_in); + + return retval; } -int mips32_pracc_write_mem8(mips_ejtag_t *ejtag_info, u32 addr, int count, u8 *buf) +static int mips32_pracc_write_mem8(struct mips_ejtag *ejtag_info, uint32_t addr, int count, uint8_t *buf) { - u32 code[] = { + static const uint32_t code[] = { /* start: */ MIPS32_MTC0(15,31,0), /* move $15 to COP0 DeSave */ - MIPS32_LUI(15,UPPER16(MIPS32_PRACC_STACK)), /* $15 = MIPS32_PRACC_STACK */ + MIPS32_LUI(15,UPPER16(MIPS32_PRACC_STACK)), /* $15 = MIPS32_PRACC_STACK */ MIPS32_ORI(15,15,LOWER16(MIPS32_PRACC_STACK)), - MIPS32_SW(8,0,15), /* sw $8,($15) */ - MIPS32_SW(9,0,15), /* sw $9,($15) */ - MIPS32_SW(10,0,15), /* sw $10,($15) */ - MIPS32_SW(11,0,15), /* sw $11,($15) */ - - MIPS32_LUI(8,UPPER16(MIPS32_PRACC_PARAM_IN)), /* $8 = MIPS32_PRACC_PARAM_IN */ + MIPS32_SW(8,0,15), /* sw $8,($15) */ + MIPS32_SW(9,0,15), /* sw $9,($15) */ + MIPS32_SW(10,0,15), /* sw $10,($15) */ + MIPS32_SW(11,0,15), /* sw $11,($15) */ + + MIPS32_LUI(8,UPPER16(MIPS32_PRACC_PARAM_IN)), /* $8 = MIPS32_PRACC_PARAM_IN */ MIPS32_ORI(8,8,LOWER16(MIPS32_PRACC_PARAM_IN)), - MIPS32_LW(9,0,8), /* Load write addr to $9 */ - MIPS32_LW(10,4,8), /* Load write count to $10 */ - MIPS32_ADDI(8,8,8), /* $8+=8 */ - MIPS32_NOP, + MIPS32_LW(9,0,8), /* Load write addr to $9 */ + MIPS32_LW(10,4,8), /* Load write count to $10 */ + MIPS32_ADDI(8,8,8), /* $8 += 8 */ /* loop: */ - MIPS32_BEQ(0,10,9), /* beq $0, $10, end */ + MIPS32_BEQ(0,10,8), /* beq $0, $10, end */ MIPS32_NOP, - - MIPS32_LW(11,0,8), /* lw $11,0($8), Load $11 with the word @mem[$8] */ - MIPS32_SB(11,0,9), /* sb $11,0($9) */ - - MIPS32_ADDI(10,10,NEG16(1)), /* $10-- */ - MIPS32_ADDI(9,9,1), /* $9+=1 */ - MIPS32_ADDI(8,8,4), /* $8+=4 */ - - MIPS32_NOP, - MIPS32_B(NEG16(9)), /* b loop */ + + MIPS32_LW(11,0,8), /* lw $11,0($8), Load $11 with the word @mem[$8] */ + MIPS32_SB(11,0,9), /* sb $11,0($9) */ + + MIPS32_ADDI(10,10,NEG16(1)), /* $10-- */ + MIPS32_ADDI(9,9,1), /* $9 += 1 */ + MIPS32_ADDI(8,8,4), /* $8 += 4 */ + + MIPS32_B(NEG16(8)), /* b loop */ MIPS32_NOP, /* end: */ - MIPS32_LW(11,0,15), /* sw $11,($15) */ - MIPS32_LW(10,0,15), /* sw $10,($15) */ - MIPS32_LW(9,0,15), /* sw $9,($15) */ - MIPS32_LW(8,0,15), /* sw $8,($15) */ + MIPS32_LW(11,0,15), /* lw $11,($15) */ + MIPS32_LW(10,0,15), /* lw $10,($15) */ + MIPS32_LW(9,0,15), /* lw $9,($15) */ + MIPS32_LW(8,0,15), /* lw $8,($15) */ + MIPS32_B(NEG16(26)), /* b start */ MIPS32_MFC0(15,31,0), /* move COP0 DeSave to $15 */ - MIPS32_NOP, - MIPS32_B(NEG16(30)), /* b start */ - MIPS32_NOP, }; - + /* TODO remove array */ - u32 param_in[count+2]; + uint32_t *param_in = malloc((count + 2) * sizeof(uint32_t)); int retval; int i; param_in[0] = addr; param_in[1] = count; - + for (i = 0; i < count; i++) { - param_in[i+2] = buf[i]; + param_in[i + 2] = buf[i]; } - - retval = mips32_pracc_exec(ejtag_info, sizeof(code)/sizeof(code[0]), code, \ - sizeof(param_in)/sizeof(param_in[0]), param_in, 0, NULL, 1); + + retval = mips32_pracc_exec(ejtag_info, ARRAY_SIZE(code), code, + count + 2, param_in, 0, NULL, 1); + + free(param_in); return retval; } -int mips32_pracc_write_regs(mips_ejtag_t *ejtag_info, u32 *regs) +int mips32_pracc_write_regs(struct mips_ejtag *ejtag_info, uint32_t *regs) { - /* TODO restore all core registers */ - - u32 code[] = { + static const uint32_t code[] = { /* start: */ - MIPS32_MTC0(2,31,0), /* move $2 to COP0 DeSave */ - MIPS32_LUI(2,UPPER16(MIPS32_PRACC_PARAM_IN)), /* $2 = MIPS32_PRACC_PARAM_IN */ + MIPS32_LUI(2,UPPER16(MIPS32_PRACC_PARAM_IN)), /* $2 = MIPS32_PRACC_PARAM_IN */ MIPS32_ORI(2,2,LOWER16(MIPS32_PRACC_PARAM_IN)), - /*MIPS32_LW(0,0*4,2),*/ /* lw $0,0*4($2) */ - MIPS32_LW(1,1*4,2), /* lw $1,1*4($2) */ - MIPS32_MFC0(2,31,0), /* move COP0 DeSave to $2 */ - - MIPS32_MTC0(1,31,0), /* move $1 to COP0 DeSave */ - MIPS32_LUI(1,UPPER16(MIPS32_PRACC_PARAM_IN)), /* $1 = MIPS32_PRACC_PARAM_IN */ + MIPS32_LW(1,1*4,2), /* lw $1,1*4($2) */ + MIPS32_LW(15,15*4,2), /* lw $15,15*4($2) */ + MIPS32_MTC0(15,31,0), /* move $15 to COP0 DeSave */ + MIPS32_LUI(15,UPPER16(MIPS32_PRACC_STACK)), /* $15 = MIPS32_PRACC_STACK */ + MIPS32_ORI(15,15,LOWER16(MIPS32_PRACC_STACK)), + MIPS32_SW(1,0,15), /* sw $1,($15) */ + MIPS32_LUI(1,UPPER16(MIPS32_PRACC_PARAM_IN)), /* $1 = MIPS32_PRACC_PARAM_IN */ MIPS32_ORI(1,1,LOWER16(MIPS32_PRACC_PARAM_IN)), - MIPS32_LW(2,2*4,1), /* lw $2,2*4($1) */ - MIPS32_LW(3,3*4,1), /* lw $3,3*4($1) */ - MIPS32_LW(4,4*4,1), /* lw $4,4*4($1) */ - MIPS32_LW(5,5*4,1), /* lw $5,5*4($1) */ - MIPS32_LW(6,6*4,1), /* lw $6,6*4($1) */ - MIPS32_LW(7,7*4,1), /* lw $7,7*4($1) */ - MIPS32_LW(8,8*4,1), /* lw $8,8*4($1) */ - MIPS32_LW(9,9*4,1), /* lw $9,9*4($1) */ - MIPS32_LW(10,10*4,1), /* lw $10,10*4($1) */ - MIPS32_LW(11,11*4,1), /* lw $11,11*4($1) */ - MIPS32_LW(12,12*4,1), /* lw $12,12*4($1) */ - MIPS32_LW(13,13*4,1), /* lw $13,13*4($1) */ - MIPS32_LW(14,14*4,1), /* lw $14,14*4($1) */ - MIPS32_LW(15,15*4,1), /* lw $15,15*4($1) */ - MIPS32_LW(16,16*4,1), /* lw $16,16*4($1) */ - MIPS32_LW(17,17*4,1), /* lw $17,17*4($1) */ - MIPS32_LW(18,18*4,1), /* lw $18,18*4($1) */ - MIPS32_LW(19,19*4,1), /* lw $19,19*4($1) */ - MIPS32_LW(20,20*4,1), /* lw $20,20*4($1) */ - MIPS32_LW(21,21*4,1), /* lw $21,21*4($1) */ - MIPS32_LW(22,22*4,1), /* lw $22,22*4($1) */ - MIPS32_LW(23,23*4,1), /* lw $23,23*4($1) */ - MIPS32_LW(24,24*4,1), /* lw $24,24*4($1) */ - MIPS32_LW(25,25*4,1), /* lw $25,25*4($1) */ - MIPS32_LW(26,26*4,1), /* lw $26,26*4($1) */ - MIPS32_LW(27,27*4,1), /* lw $27,27*4($1) */ - MIPS32_LW(28,28*4,1), /* lw $28,28*4($1) */ - MIPS32_LW(29,29*4,1), /* lw $29,29*4($1) */ - MIPS32_LW(30,30*4,1), /* lw $30,30*4($1) */ - MIPS32_LW(31,31*4,1), /* lw $31,31*4($1) */ - - MIPS32_MFC0(1,31,0), /* move COP0 DeSave to $1 */ - MIPS32_NOP, - MIPS32_B(NEG16(41)), /* b start */ - MIPS32_NOP, + MIPS32_LW(3,3*4,1), /* lw $3,3*4($1) */ + MIPS32_LW(4,4*4,1), /* lw $4,4*4($1) */ + MIPS32_LW(5,5*4,1), /* lw $5,5*4($1) */ + MIPS32_LW(6,6*4,1), /* lw $6,6*4($1) */ + MIPS32_LW(7,7*4,1), /* lw $7,7*4($1) */ + MIPS32_LW(8,8*4,1), /* lw $8,8*4($1) */ + MIPS32_LW(9,9*4,1), /* lw $9,9*4($1) */ + MIPS32_LW(10,10*4,1), /* lw $10,10*4($1) */ + MIPS32_LW(11,11*4,1), /* lw $11,11*4($1) */ + MIPS32_LW(12,12*4,1), /* lw $12,12*4($1) */ + MIPS32_LW(13,13*4,1), /* lw $13,13*4($1) */ + MIPS32_LW(14,14*4,1), /* lw $14,14*4($1) */ + MIPS32_LW(16,16*4,1), /* lw $16,16*4($1) */ + MIPS32_LW(17,17*4,1), /* lw $17,17*4($1) */ + MIPS32_LW(18,18*4,1), /* lw $18,18*4($1) */ + MIPS32_LW(19,19*4,1), /* lw $19,19*4($1) */ + MIPS32_LW(20,20*4,1), /* lw $20,20*4($1) */ + MIPS32_LW(21,21*4,1), /* lw $21,21*4($1) */ + MIPS32_LW(22,22*4,1), /* lw $22,22*4($1) */ + MIPS32_LW(23,23*4,1), /* lw $23,23*4($1) */ + MIPS32_LW(24,24*4,1), /* lw $24,24*4($1) */ + MIPS32_LW(25,25*4,1), /* lw $25,25*4($1) */ + MIPS32_LW(26,26*4,1), /* lw $26,26*4($1) */ + MIPS32_LW(27,27*4,1), /* lw $27,27*4($1) */ + MIPS32_LW(28,28*4,1), /* lw $28,28*4($1) */ + MIPS32_LW(29,29*4,1), /* lw $29,29*4($1) */ + MIPS32_LW(30,30*4,1), /* lw $30,30*4($1) */ + MIPS32_LW(31,31*4,1), /* lw $31,31*4($1) */ + + MIPS32_LW(2,32*4,1), /* lw $2,32*4($1) */ + MIPS32_MTC0(2,12,0), /* move $2 to status */ + MIPS32_LW(2,33*4,1), /* lw $2,33*4($1) */ + MIPS32_MTLO(2), /* move $2 to lo */ + MIPS32_LW(2,34*4,1), /* lw $2,34*4($1) */ + MIPS32_MTHI(2), /* move $2 to hi */ + MIPS32_LW(2,35*4,1), /* lw $2,35*4($1) */ + MIPS32_MTC0(2,8,0), /* move $2 to badvaddr */ + MIPS32_LW(2,36*4,1), /* lw $2,36*4($1) */ + MIPS32_MTC0(2,13,0), /* move $2 to cause*/ + MIPS32_LW(2,37*4,1), /* lw $2,37*4($1) */ + MIPS32_MTC0(2,24,0), /* move $2 to depc (pc) */ + + MIPS32_LW(2,2*4,1), /* lw $2,2*4($1) */ + MIPS32_LW(1,0,15), /* lw $1,($15) */ + MIPS32_B(NEG16(53)), /* b start */ + MIPS32_MFC0(15,31,0), /* move COP0 DeSave to $15 */ }; - + int retval; - - retval = mips32_pracc_exec(ejtag_info, sizeof(code)/sizeof(code[0]), code, \ - 32, regs, 0, NULL, 1); - + + retval = mips32_pracc_exec(ejtag_info, ARRAY_SIZE(code), code, + MIPS32NUMCOREREGS, regs, 0, NULL, 1); + return retval; } -int mips32_pracc_read_regs(mips_ejtag_t *ejtag_info, u32 *regs) +int mips32_pracc_read_regs(struct mips_ejtag *ejtag_info, uint32_t *regs) { - u32 code[] = { + static const uint32_t code[] = { /* start: */ MIPS32_MTC0(2,31,0), /* move $2 to COP0 DeSave */ - MIPS32_LUI(2,UPPER16(MIPS32_PRACC_PARAM_OUT)), /* $2 = MIPS32_PRACC_PARAM_OUT */ + MIPS32_LUI(2,UPPER16(MIPS32_PRACC_PARAM_OUT)), /* $2 = MIPS32_PRACC_PARAM_OUT */ MIPS32_ORI(2,2,LOWER16(MIPS32_PRACC_PARAM_OUT)), MIPS32_SW(0,0*4,2), /* sw $0,0*4($2) */ - MIPS32_SW(1,1*4,2), /* sw $1,1*4($2) */ - MIPS32_SW(15,15*4,2), /* sw $15,15*4($2) */ + MIPS32_SW(1,1*4,2), /* sw $1,1*4($2) */ + MIPS32_SW(15,15*4,2), /* sw $15,15*4($2) */ MIPS32_MFC0(2,31,0), /* move COP0 DeSave to $2 */ MIPS32_MTC0(15,31,0), /* move $15 to COP0 DeSave */ - MIPS32_LUI(15,UPPER16(MIPS32_PRACC_STACK)), /* $15 = MIPS32_PRACC_STACK */ + MIPS32_LUI(15,UPPER16(MIPS32_PRACC_STACK)), /* $15 = MIPS32_PRACC_STACK */ MIPS32_ORI(15,15,LOWER16(MIPS32_PRACC_STACK)), - MIPS32_SW(1,0,15), /* sw $1,($15) */ - MIPS32_SW(2,0,15), /* sw $2,($15) */ - MIPS32_LUI(1,UPPER16(MIPS32_PRACC_PARAM_OUT)), /* $1 = MIPS32_PRACC_PARAM_OUT */ + MIPS32_SW(1,0,15), /* sw $1,($15) */ + MIPS32_SW(2,0,15), /* sw $2,($15) */ + MIPS32_LUI(1,UPPER16(MIPS32_PRACC_PARAM_OUT)), /* $1 = MIPS32_PRACC_PARAM_OUT */ MIPS32_ORI(1,1,LOWER16(MIPS32_PRACC_PARAM_OUT)), - MIPS32_SW(2,2*4,1), /* sw $2,2*4($1) */ - MIPS32_SW(3,3*4,1), /* sw $3,3*4($1) */ - MIPS32_SW(4,4*4,1), /* sw $4,4*4($1) */ - MIPS32_SW(5,5*4,1), /* sw $5,5*4($1) */ - MIPS32_SW(6,6*4,1), /* sw $6,6*4($1) */ - MIPS32_SW(7,7*4,1), /* sw $7,7*4($1) */ - MIPS32_SW(8,8*4,1), /* sw $8,8*4($1) */ - MIPS32_SW(9,9*4,1), /* sw $9,9*4($1) */ - MIPS32_SW(10,10*4,1), /* sw $10,10*4($1) */ - MIPS32_SW(11,11*4,1), /* sw $11,11*4($1) */ - MIPS32_SW(12,12*4,1), /* sw $12,12*4($1) */ - MIPS32_SW(13,13*4,1), /* sw $13,13*4($1) */ - MIPS32_SW(14,14*4,1), /* sw $14,14*4($1) */ - MIPS32_SW(16,16*4,1), /* sw $16,16*4($1) */ - MIPS32_SW(17,17*4,1), /* sw $17,17*4($1) */ - MIPS32_SW(18,18*4,1), /* sw $18,18*4($1) */ - MIPS32_SW(19,19*4,1), /* sw $19,19*4($1) */ - MIPS32_SW(20,20*4,1), /* sw $20,20*4($1) */ - MIPS32_SW(21,21*4,1), /* sw $21,21*4($1) */ - MIPS32_SW(22,22*4,1), /* sw $22,22*4($1) */ - MIPS32_SW(23,23*4,1), /* sw $23,23*4($1) */ - MIPS32_SW(24,24*4,1), /* sw $24,24*4($1) */ - MIPS32_SW(25,25*4,1), /* sw $25,25*4($1) */ - MIPS32_SW(26,26*4,1), /* sw $26,26*4($1) */ - MIPS32_SW(27,27*4,1), /* sw $27,27*4($1) */ - MIPS32_SW(28,28*4,1), /* sw $28,28*4($1) */ - MIPS32_SW(29,29*4,1), /* sw $29,29*4($1) */ - MIPS32_SW(30,30*4,1), /* sw $30,30*4($1) */ - MIPS32_SW(31,31*4,1), /* sw $31,31*4($1) */ - + MIPS32_SW(2,2*4,1), /* sw $2,2*4($1) */ + MIPS32_SW(3,3*4,1), /* sw $3,3*4($1) */ + MIPS32_SW(4,4*4,1), /* sw $4,4*4($1) */ + MIPS32_SW(5,5*4,1), /* sw $5,5*4($1) */ + MIPS32_SW(6,6*4,1), /* sw $6,6*4($1) */ + MIPS32_SW(7,7*4,1), /* sw $7,7*4($1) */ + MIPS32_SW(8,8*4,1), /* sw $8,8*4($1) */ + MIPS32_SW(9,9*4,1), /* sw $9,9*4($1) */ + MIPS32_SW(10,10*4,1), /* sw $10,10*4($1) */ + MIPS32_SW(11,11*4,1), /* sw $11,11*4($1) */ + MIPS32_SW(12,12*4,1), /* sw $12,12*4($1) */ + MIPS32_SW(13,13*4,1), /* sw $13,13*4($1) */ + MIPS32_SW(14,14*4,1), /* sw $14,14*4($1) */ + MIPS32_SW(16,16*4,1), /* sw $16,16*4($1) */ + MIPS32_SW(17,17*4,1), /* sw $17,17*4($1) */ + MIPS32_SW(18,18*4,1), /* sw $18,18*4($1) */ + MIPS32_SW(19,19*4,1), /* sw $19,19*4($1) */ + MIPS32_SW(20,20*4,1), /* sw $20,20*4($1) */ + MIPS32_SW(21,21*4,1), /* sw $21,21*4($1) */ + MIPS32_SW(22,22*4,1), /* sw $22,22*4($1) */ + MIPS32_SW(23,23*4,1), /* sw $23,23*4($1) */ + MIPS32_SW(24,24*4,1), /* sw $24,24*4($1) */ + MIPS32_SW(25,25*4,1), /* sw $25,25*4($1) */ + MIPS32_SW(26,26*4,1), /* sw $26,26*4($1) */ + MIPS32_SW(27,27*4,1), /* sw $27,27*4($1) */ + MIPS32_SW(28,28*4,1), /* sw $28,28*4($1) */ + MIPS32_SW(29,29*4,1), /* sw $29,29*4($1) */ + MIPS32_SW(30,30*4,1), /* sw $30,30*4($1) */ + MIPS32_SW(31,31*4,1), /* sw $31,31*4($1) */ + MIPS32_MFC0(2,12,0), /* move status to $2 */ - MIPS32_SW(2,32*4,1), /* sw $2,32*4($1) */ - MIPS32_LO(2), /* move lo to $2 */ - MIPS32_SW(2,33*4,1), /* sw $2,33*4($1) */ - MIPS32_HI(2), /* move hi to $2 */ - MIPS32_SW(2,34*4,1), /* sw $2,34*4($1) */ + MIPS32_SW(2,32*4,1), /* sw $2,32*4($1) */ + MIPS32_MFLO(2), /* move lo to $2 */ + MIPS32_SW(2,33*4,1), /* sw $2,33*4($1) */ + MIPS32_MFHI(2), /* move hi to $2 */ + MIPS32_SW(2,34*4,1), /* sw $2,34*4($1) */ MIPS32_MFC0(2,8,0), /* move badvaddr to $2 */ - MIPS32_SW(2,35*4,1), /* sw $2,35*4($1) */ + MIPS32_SW(2,35*4,1), /* sw $2,35*4($1) */ MIPS32_MFC0(2,13,0), /* move cause to $2 */ - MIPS32_SW(2,36*4,1), /* sw $2,36*4($1) */ - MIPS32_MFC0(2,24,0), /* move pc to $2 */ - MIPS32_SW(2,37*4,1), /* sw $2,37*4($1) */ - - MIPS32_LW(2,0,15), /* sw $2,($15) */ - MIPS32_LW(1,0,15), /* sw $1,($15) */ + MIPS32_SW(2,36*4,1), /* sw $2,36*4($1) */ + MIPS32_MFC0(2,24,0), /* move depc (pc) to $2 */ + MIPS32_SW(2,37*4,1), /* sw $2,37*4($1) */ + + MIPS32_LW(2,0,15), /* lw $2,($15) */ + MIPS32_LW(1,0,15), /* lw $1,($15) */ + MIPS32_B(NEG16(58)), /* b start */ MIPS32_MFC0(15,31,0), /* move COP0 DeSave to $15 */ - MIPS32_NOP, - MIPS32_B(NEG16(60)), /* b start */ - MIPS32_NOP, }; - + int retval; - - retval = mips32_pracc_exec(ejtag_info, sizeof(code)/sizeof(code[0]), code, \ - 0, NULL, 38, regs, 1); - + + retval = mips32_pracc_exec(ejtag_info, ARRAY_SIZE(code), code, + 0, NULL, MIPS32NUMCOREREGS, regs, 1); + + return retval; +} + +/* fastdata upload/download requires an initialized working area + * to load the download code; it should not be called otherwise + * fetch order from the fastdata area + * 1. start addr + * 2. end addr + * 3. data ... + */ +int mips32_pracc_fastdata_xfer(struct mips_ejtag *ejtag_info, struct working_area *source, + int write_t, uint32_t addr, int count, uint32_t *buf) +{ + uint32_t handler_code[] = { + /* caution when editing, table is modified below */ + /* r15 points to the start of this code */ + MIPS32_SW(8,MIPS32_FASTDATA_HANDLER_SIZE - 4,15), + MIPS32_SW(9,MIPS32_FASTDATA_HANDLER_SIZE - 8,15), + MIPS32_SW(10,MIPS32_FASTDATA_HANDLER_SIZE - 12,15), + MIPS32_SW(11,MIPS32_FASTDATA_HANDLER_SIZE - 16,15), + /* start of fastdata area in t0 */ + MIPS32_LUI(8,UPPER16(MIPS32_PRACC_FASTDATA_AREA)), + MIPS32_ORI(8,8,LOWER16(MIPS32_PRACC_FASTDATA_AREA)), + MIPS32_LW(9,0,8), /* start addr in t1 */ + MIPS32_LW(10,0,8), /* end addr to t2 */ + /* loop: */ + /* 8 */ MIPS32_LW(11,0,0), /* lw t3,[t8 | r9] */ + /* 9 */ MIPS32_SW(11,0,0), /* sw t3,[r9 | r8] */ + MIPS32_BNE(10,9,NEG16(3)), /* bne $t2,t1,loop */ + MIPS32_ADDI(9,9,4), /* addi t1,t1,4 */ + + MIPS32_LW(8,MIPS32_FASTDATA_HANDLER_SIZE - 4,15), + MIPS32_LW(9,MIPS32_FASTDATA_HANDLER_SIZE - 8,15), + MIPS32_LW(10,MIPS32_FASTDATA_HANDLER_SIZE - 12,15), + MIPS32_LW(11,MIPS32_FASTDATA_HANDLER_SIZE - 16,15), + + MIPS32_LUI(15,UPPER16(MIPS32_PRACC_TEXT)), + MIPS32_ORI(15,15,LOWER16(MIPS32_PRACC_TEXT)), + MIPS32_JR(15), /* jr start */ + MIPS32_MFC0(15,31,0), /* move COP0 DeSave to $15 */ + }; + + uint32_t jmp_code[] = { + MIPS32_MTC0(15,31,0), /* move $15 to COP0 DeSave */ + /* 1 */ MIPS32_LUI(15,0), /* addr of working area added below */ + /* 2 */ MIPS32_ORI(15,15,0), /* addr of working area added below */ + MIPS32_JR(15), /* jump to ram program */ + MIPS32_NOP, + }; + + int retval, i; + uint32_t val, ejtag_ctrl, address; + + if (source->size < MIPS32_FASTDATA_HANDLER_SIZE) + return ERROR_TARGET_RESOURCE_NOT_AVAILABLE; + + if (write_t) + { + handler_code[8] = MIPS32_LW(11,0,8); /* load data from probe at fastdata area */ + handler_code[9] = MIPS32_SW(11,0,9); /* store data to RAM @ r9 */ + } + else + { + handler_code[8] = MIPS32_LW(11,0,9); /* load data from RAM @ r9 */ + handler_code[9] = MIPS32_SW(11,0,8); /* store data to probe at fastdata area */ + } + + /* write program into RAM */ + if (write_t != ejtag_info->fast_access_save) + { + mips32_pracc_write_mem32(ejtag_info, source->address, ARRAY_SIZE(handler_code), handler_code); + /* save previous operation to speed to any consecutive read/writes */ + ejtag_info->fast_access_save = write_t; + } + + LOG_DEBUG("%s using 0x%.8" PRIx32 " for write handler", __func__, source->address); + + jmp_code[1] |= UPPER16(source->address); + jmp_code[2] |= LOWER16(source->address); + + for (i = 0; i < (int) ARRAY_SIZE(jmp_code); i++) + { + if ((retval = wait_for_pracc_rw(ejtag_info, &ejtag_ctrl)) != ERROR_OK) + return retval; + + mips_ejtag_set_instr(ejtag_info, EJTAG_INST_DATA); + mips_ejtag_drscan_32_out(ejtag_info, jmp_code[i]); + + /* Clear the access pending bit (let the processor eat!) */ + ejtag_ctrl = ejtag_info->ejtag_ctrl & ~EJTAG_CTRL_PRACC; + mips_ejtag_set_instr(ejtag_info, EJTAG_INST_CONTROL); + mips_ejtag_drscan_32_out(ejtag_info, ejtag_ctrl); + } + + if ((retval = wait_for_pracc_rw(ejtag_info, &ejtag_ctrl)) != ERROR_OK) + return retval; + + /* next fetch to dmseg should be in FASTDATA_AREA, check */ + address = 0; + mips_ejtag_set_instr(ejtag_info, EJTAG_INST_ADDRESS); + retval = mips_ejtag_drscan_32(ejtag_info, &address); + if (retval != ERROR_OK) + return retval; + + if (address != MIPS32_PRACC_FASTDATA_AREA) + return ERROR_FAIL; + + /* wait PrAcc pending bit for FASTDATA write */ + if ((retval = wait_for_pracc_rw(ejtag_info, &ejtag_ctrl)) != ERROR_OK) + return retval; + + /* Send the load start address */ + val = addr; + mips_ejtag_set_instr(ejtag_info, EJTAG_INST_FASTDATA); + mips_ejtag_fastdata_scan(ejtag_info, 1, &val); + + /* Send the load end address */ + val = addr + (count - 1) * 4; + mips_ejtag_fastdata_scan(ejtag_info, 1, &val); + + for (i = 0; i < count; i++) + { + if ((retval = mips_ejtag_fastdata_scan(ejtag_info, write_t, buf++)) != ERROR_OK) + return retval; + } + + if ((retval = jtag_execute_queue()) != ERROR_OK) + { + LOG_ERROR("fastdata load failed"); + return retval; + } + + if ((retval = wait_for_pracc_rw(ejtag_info, &ejtag_ctrl)) != ERROR_OK) + return retval; + + address = 0; + mips_ejtag_set_instr(ejtag_info, EJTAG_INST_ADDRESS); + retval = mips_ejtag_drscan_32(ejtag_info, &address); + if (retval != ERROR_OK) + return retval; + + if (address != MIPS32_PRACC_TEXT) + LOG_ERROR("mini program did not return to start"); + return retval; }