X-Git-Url: https://review.openocd.org/gitweb?p=openocd.git;a=blobdiff_plain;f=src%2Ftarget%2Fmips32_pracc.c;h=2ccbfc7fc4891484e41beae4892554799591b085;hp=4f9a7042276373144d40118593d779abf3a46c39;hb=37a6e402502d698aaf9d4f6d32fe4ccdcc5ff9b6;hpb=0d06a06f8bb7d0dcb91ec7d31ab00c0c730f1cf4 diff --git a/src/target/mips32_pracc.c b/src/target/mips32_pracc.c index 4f9a704227..2ccbfc7fc4 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 * @@ -21,64 +26,62 @@ ***************************************************************************/ /* -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 -*/ - + * 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 "mips32.h" #include "mips32_pracc.h" -struct mips32_pracc_context -{ +struct mips32_pracc_context { uint32_t *local_iparam; int num_iparam; uint32_t *local_oparam; @@ -90,19 +93,35 @@ struct mips32_pracc_context struct mips_ejtag *ejtag_info; }; +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) { 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); - while (1) - { - mips_ejtag_set_instr(ejtag_info, EJTAG_INST_CONTROL, NULL); + while (1) { 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; + + timeout = timeval_ms() - then; + if (timeout > 1000) { + LOG_DEBUG("DEBUGMODULE: No memory access in progress!"); + return ERROR_JTAG_DEVICE_ERROR; + } } *ctrl = ejtag_ctrl; @@ -116,102 +135,89 @@ static int mips32_pracc_exec_read(struct mips32_pracc_context *ctx, uint32_t add uint32_t ejtag_ctrl, data; if ((address >= MIPS32_PRACC_PARAM_IN) - && (address <= MIPS32_PRACC_PARAM_IN + ctx->num_iparam * 4)) - { + && (address < MIPS32_PRACC_PARAM_IN + ctx->num_iparam * 4)) { offset = (address - MIPS32_PRACC_PARAM_IN) / 4; data = ctx->local_iparam[offset]; - } - else if ((address >= MIPS32_PRACC_PARAM_OUT) - && (address <= MIPS32_PRACC_PARAM_OUT + ctx->num_oparam * 4)) - { + } else if ((address >= MIPS32_PRACC_PARAM_OUT) + && (address < MIPS32_PRACC_PARAM_OUT + ctx->num_oparam * 4)) { offset = (address - MIPS32_PRACC_PARAM_OUT) / 4; data = ctx->local_oparam[offset]; - } - else if ((address >= MIPS32_PRACC_TEXT) - && (address <= MIPS32_PRACC_TEXT + ctx->code_len*4)) - { + } else if ((address >= MIPS32_PRACC_TEXT) + && (address < MIPS32_PRACC_TEXT + ctx->code_len * 4)) { offset = (address - MIPS32_PRACC_TEXT) / 4; data = ctx->code[offset]; - } - else if (address == MIPS32_PRACC_STACK) - { + } else if (address == MIPS32_PRACC_STACK) { + if (ctx->stack_offset <= 0) { + LOG_ERROR("Error: Pracc stack out of bounds"); + return ERROR_JTAG_DEVICE_ERROR; + } /* save to our debug stack */ data = ctx->stack[--ctx->stack_offset]; - } - else - { + } else { /* TODO: send JMP 0xFF200000 instruction. Hopefully processor jump back * to start of debug vector */ - data = 0; - LOG_ERROR("Error reading unexpected address %8.8" PRIx32 "", 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); - - jtag_add_clocks(5); - jtag_execute_queue(); + mips_ejtag_set_instr(ctx->ejtag_info, EJTAG_INST_CONTROL); + mips_ejtag_drscan_32_out(ctx->ejtag_info, ejtag_ctrl); - - return ERROR_OK; + return jtag_execute_queue(); } static int mips32_pracc_exec_write(struct mips32_pracc_context *ctx, uint32_t address) { - uint32_t ejtag_ctrl,data; + uint32_t ejtag_ctrl, data; int offset; struct mips_ejtag *ejtag_info = ctx->ejtag_info; + int retval; - 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); + 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); - jtag_add_clocks(5); - jtag_execute_queue(); + 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) - && (address <= MIPS32_PRACC_PARAM_OUT + ctx->num_oparam * 4)) - { + if ((address >= MIPS32_PRACC_PARAM_OUT) + && (address < MIPS32_PRACC_PARAM_OUT + ctx->num_oparam * 4)) { offset = (address - MIPS32_PRACC_PARAM_OUT) / 4; ctx->local_oparam[offset] = data; - } - else if (address == MIPS32_PRACC_STACK) - { + } else if (address == MIPS32_PRACC_STACK) { + if (ctx->stack_offset >= 32) { + LOG_ERROR("Error: Pracc stack out of bounds"); + return ERROR_JTAG_DEVICE_ERROR; + } /* save data onto our stack */ ctx->stack[ctx->stack_offset++] = data; - } - else - { - LOG_ERROR("Error writing unexpected address %8.8" PRIx32 "", address); + } else { + LOG_ERROR("Error writing unexpected address 0x%8.8" PRIx32 "", address); return ERROR_JTAG_DEVICE_ERROR; } return ERROR_OK; } -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) +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) { uint32_t ejtag_ctrl; - uint32_t address, data; + uint32_t address; struct mips32_pracc_context ctx; int retval; int pass = 0; @@ -225,36 +231,32 @@ int mips32_pracc_exec(struct mips_ejtag *ejtag_info, int code_len, const uint32_ ctx.ejtag_info = ejtag_info; ctx.stack_offset = 0; - while (1) - { - if ((retval = wait_for_pracc_rw(ejtag_info, &ejtag_ctrl)) != ERROR_OK) + while (1) { + retval = wait_for_pracc_rw(ejtag_info, &ejtag_ctrl); + if (retval != ERROR_OK) return retval; - address = data = 0; - mips_ejtag_set_instr(ejtag_info, EJTAG_INST_ADDRESS, NULL); - mips_ejtag_drscan_32(ejtag_info, &address); - -// printf("Adres: %.8x\n", address); + 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; /* Check for read or write */ - if (ejtag_ctrl & EJTAG_CTRL_PRNW) - { - if ((retval = mips32_pracc_exec_write(&ctx, address)) != ERROR_OK) + if (ejtag_ctrl & EJTAG_CTRL_PRNW) { + retval = mips32_pracc_exec_write(&ctx, address); + if (retval != ERROR_OK) return retval; - } - else - { + } else { /* Check to see if its reading at the debug vector. The first pass through * the module is always read at the vector, so the first one we allow. When * the second read from the vector occurs we are done and just exit. */ if ((address == MIPS32_PRACC_TEXT) && (pass++)) - { break; - } - if ((retval = mips32_pracc_exec_read(&ctx, address)) != ERROR_OK) + retval = mips32_pracc_exec_read(&ctx, address); + if (retval != ERROR_OK) return retval; - } if (cycle == 0) @@ -263,673 +265,741 @@ int mips32_pracc_exec(struct mips_ejtag *ejtag_info, int code_len, const uint32_ /* stack sanity check */ if (ctx.stack_offset != 0) - { LOG_DEBUG("Pracc Stack not zero"); - } return ERROR_OK; } -int mips32_pracc_read_mem(struct mips_ejtag *ejtag_info, uint32_t addr, int size, int count, void *buf) +static int mips32_pracc_read_u32(struct mips_ejtag *ejtag_info, uint32_t addr, uint32_t *buf) { - switch (size) - { - case 1: - return mips32_pracc_read_mem8(ejtag_info, addr, count, (uint8_t*)buf); - case 2: - return mips32_pracc_read_mem16(ejtag_info, addr, count, (uint16_t*)buf); - case 4: - 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); - } + uint32_t code[] = { + /* start: */ + MIPS32_MTC0(15, 31, 0), /* move $15 to COP0 DeSave */ + MIPS32_LUI(15, PRACC_UPPER_BASE_ADDR), /* $15 = MIPS32_PRACC_BASE_ADDR */ - return ERROR_OK; + MIPS32_LUI(8, UPPER16((addr + 0x8000))), /* load $8 with modified upper address */ + MIPS32_LW(8, LOWER16(addr), 8), /* lw $8, LOWER16(addr)($8) */ + MIPS32_SW(8, PRACC_OUT_OFFSET, 15), /* sw $8,PRACC_OUT_OFFSET($15) */ + + MIPS32_LUI(8, UPPER16(ejtag_info->reg8)), /* restore upper 16 bits of reg 8 */ + MIPS32_ORI(8, 8, LOWER16(ejtag_info->reg8)), /* restore lower 16 bits of reg 8 */ + MIPS32_B(NEG16(8)), /* b start */ + MIPS32_MFC0(15, 31, 0), /* move COP0 DeSave to $15 */ + }; + + return mips32_pracc_exec(ejtag_info, ARRAY_SIZE(code), code, 0, NULL, 1, buf, 1); } -int mips32_pracc_read_mem32(struct mips_ejtag *ejtag_info, uint32_t addr, int count, uint32_t *buf) +int mips32_pracc_read_mem(struct mips_ejtag *ejtag_info, uint32_t addr, int size, int count, void *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_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_ORI(11,11,LOWER16(MIPS32_PRACC_PARAM_OUT)), - MIPS32_NOP, - /* loop: */ - MIPS32_BEQ(0,10,9), /* beq 0, $10, end */ - MIPS32_NOP, + if (count == 1 && size == 4) + return mips32_pracc_read_u32(ejtag_info, addr, (uint32_t *)buf); - 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) */ + int retval = ERROR_FAIL; - MIPS32_ADDI(10,10,NEG16(1)), /* $10-- */ - MIPS32_ADDI(9,9,4), /* $1 += 4 */ - MIPS32_ADDI(11,11,4), /* $11 += 4 */ + uint32_t *code = NULL; + uint32_t *data = NULL; - MIPS32_NOP, - MIPS32_B(NEG16(9)), /* 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_MFC0(15,31,0), /* move COP0 DeSave to $15 */ - MIPS32_NOP, - MIPS32_B(NEG16(31)), /* b start */ - MIPS32_NOP, - }; + code = malloc((256 * 2 + 10) * sizeof(uint32_t)); + if (code == NULL) { + LOG_ERROR("Out of memory"); + goto exit; + } + + if (size != 4) { + data = malloc(256 * sizeof(uint32_t)); + if (data == NULL) { + LOG_ERROR("Out of memory"); + goto exit; + } + } + + uint32_t *buf32 = buf; + uint16_t *buf16 = buf; + uint8_t *buf8 = buf; - int retval = ERROR_OK; - int blocksize; - int bytesread; - uint32_t param_in[2]; + int i; + uint32_t upper_base_addr, last_upper_base_addr; + int this_round_count; + int code_len; - bytesread = 0; + while (count) { + this_round_count = (count > 256) ? 256 : count; + last_upper_base_addr = UPPER16((addr + 0x8000)); + uint32_t *code_p = code; + + *code_p++ = MIPS32_MTC0(15, 31, 0); /* save $15 in DeSave */ + *code_p++ = MIPS32_LUI(15, PRACC_UPPER_BASE_ADDR); /* $15 = MIPS32_PRACC_BASE_ADDR */ + *code_p++ = MIPS32_LUI(9, last_upper_base_addr); /* load the upper memory address in $9*/ + code_len = 3; + + for (i = 0; i != this_round_count; i++) { /* Main code loop */ + upper_base_addr = UPPER16((addr + 0x8000)); + if (last_upper_base_addr != upper_base_addr) { + *code_p++ = MIPS32_LUI(9, upper_base_addr); /* if needed, change upper address in $9*/ + code_len++; + last_upper_base_addr = upper_base_addr; + } - while (count > 0) - { - blocksize = count; - if (count > 0x400) - blocksize = 0x400; + if (size == 4) + *code_p++ = MIPS32_LW(8, LOWER16(addr), 9); /* load from memory to $8 */ + else if (size == 2) + *code_p++ = MIPS32_LHU(8, LOWER16(addr), 9); + else + *code_p++ = MIPS32_LBU(8, LOWER16(addr), 9); - param_in[0] = addr; - param_in[1] = blocksize; + *code_p++ = MIPS32_SW(8, PRACC_OUT_OFFSET + i * 4, 15); /* store $8 at param out */ - 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) - { - return retval; + code_len += 2; + addr += size; } - count -= blocksize; - addr += blocksize; - bytesread += blocksize; + *code_p++ = MIPS32_LUI(8, UPPER16(ejtag_info->reg8)); /* restore upper 16 bits of reg 8 */ + *code_p++ = MIPS32_ORI(8, 8, LOWER16(ejtag_info->reg8)); /* restore lower 16 bits of reg 8 */ + *code_p++ = MIPS32_LUI(9, UPPER16(ejtag_info->reg8)); /* restore upper 16 bits of reg 9 */ + *code_p++ = MIPS32_ORI(9, 9, LOWER16(ejtag_info->reg8)); /* restore lower 16 bits of reg 9 */ + + code_len += 6; + *code_p++ = MIPS32_B(NEG16(code_len - 1)); /* jump to start */ + *code_p = MIPS32_MFC0(15, 31, 0); /* restore $15 from DeSave */ + + if (size == 4) { + retval = mips32_pracc_exec(ejtag_info, code_len, code, 0, NULL, this_round_count, buf32, 1); + if (retval != ERROR_OK) + goto exit; + buf32 += this_round_count; + } else { + retval = mips32_pracc_exec(ejtag_info, code_len, code, 0, NULL, this_round_count, data, 1); + if (retval != ERROR_OK) + goto exit; + uint32_t *data_p = data; + for (i = 0; i != this_round_count; i++) { + if (size == 2) + *buf16++ = *data_p++; + else + *buf8++ = *data_p++; + } + } + count -= this_round_count; } +exit: + if (code) + free(code); + if (data) + free(data); return retval; } -int mips32_pracc_read_u32(struct mips_ejtag *ejtag_info, uint32_t addr, uint32_t *buf) +int mips32_cp0_read(struct mips_ejtag *ejtag_info, uint32_t *val, uint32_t cp0_reg, uint32_t cp0_sel) { - static const uint32_t code[] = { + /** + * Do not make this code static, but regenerate it every time, + * as 2th 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, PRACC_UPPER_BASE_ADDR), /* $15 = MIPS32_PRACC_BASE_ADDR */ + + /* 2 */ MIPS32_MFC0(8, 0, 0), /* move COP0 [cp0_reg select] to $8 */ + MIPS32_SW(8, PRACC_OUT_OFFSET, 15), /* sw $8,PRACC_OUT_OFFSET($15) */ + + MIPS32_LUI(8, UPPER16(ejtag_info->reg8)), /* restore upper 16 bits of reg 8 */ + MIPS32_ORI(8, 8, LOWER16(ejtag_info->reg8)), /* restore lower 16 bits of reg 8 */ + MIPS32_B(NEG16(7)), /* 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[2] |= (cp0_reg << 11) | cp0_sel; /* change rd and funct of MIPS32_R_INST macro */ + + return mips32_pracc_exec(ejtag_info, ARRAY_SIZE(code), code, 0, NULL, 1, val, 1); +} + +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_MTC0(15, 31, 0), /* move $15 to COP0 DeSave */ + MIPS32_LUI(15, UPPER16(val)), /* Load val to $15 */ + MIPS32_ORI(15, 15, LOWER16(val)), - MIPS32_LW(8,NEG16(MIPS32_PRACC_STACK-MIPS32_PRACC_PARAM_IN), 15), //load R8 @ param_in[0] = address + /* 3 */ MIPS32_MTC0(15, 0, 0), /* move $15 to COP0 [cp0_reg select] */ - 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), /* sw $8,0($9) */ + MIPS32_B(NEG16(5)), /* b start */ + MIPS32_MFC0(15, 31, 0), /* move COP0 DeSave to $15 */ + }; - MIPS32_LW(8,0,15), /* lw $8,($15) */ - MIPS32_B(NEG16(9)), //was 17 /* b start */ - MIPS32_MFC0(15,31,0), //this instruction will be executed (MIPS executes instruction after jump) /* move COP0 DeSave to $15 */ - MIPS32_NOP, + /** + * 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[3] |= (cp0_reg << 11) | cp0_sel; /* change rd and funct fields of MIPS32_R_INST macro */ + + return mips32_pracc_exec(ejtag_info, ARRAY_SIZE(code), code, 0, NULL, 0, NULL, 1); +} + +/** + * \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 $15 */ }; - int retval = ERROR_OK; - uint32_t param_in[1]; + /* TODO remove array */ + uint32_t *param_in = malloc(2 * sizeof(uint32_t)); + int retval; + param_in[0] = start_addr; + param_in[1] = end_addr; - param_in[0] = addr; + retval = mips32_pracc_exec(ejtag_info, ARRAY_SIZE(code), code, 2, param_in, 0, NULL, 1); - if ((retval = mips32_pracc_exec(ejtag_info, sizeof(code)/sizeof(code[0]), code, - sizeof(param_in)/sizeof(param_in[0]), param_in, sizeof(uint32_t), buf, 1)) != ERROR_OK) - { - return retval; - } + free(param_in); return retval; } -int mips32_pracc_read_mem16(struct mips_ejtag *ejtag_info, uint32_t addr, int count, uint16_t *buf) +/** + * \b mips32_pracc_clean_invalidate_cache + * + * Writeback D$ 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), /* $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_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_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_NOP, - MIPS32_B(NEG16(9)), /* b loop */ - MIPS32_NOP, + 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 */ - 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_MFC0(15,31,0), /* move COP0 DeSave to $15 */ - MIPS32_NOP, - MIPS32_B(NEG16(31)), /* b start */ + /* cache_loop: */ + MIPS32_SLTU(8, 10, 9), /* sltu $8, $10, $9 : $8 <- $10 < $9 ? */ + MIPS32_BGTZ(8, 6), /* bgtz $8, end */ MIPS32_NOP, - }; -// /* TODO remove array */ - uint32_t *param_out = malloc(count * sizeof(uint32_t)); - int i; + 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) */ -// int retval; - int blocksize; - int bytesread; - uint32_t param_in[2]; + MIPS32_ADDU(9, 9, 11), /* $9 += $11 */ - bytesread = 0; + 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 */ + }; - //while (count > 0) - { - blocksize = count; - if (count > 0x400) - blocksize = 0x400; + /** + * Find cache line size in bytes + */ + uint32_t conf; + uint32_t dl, clsiz; - param_in[0] = addr; - param_in[1] = blocksize; + mips32_cp0_read(ejtag_info, &conf, 16, 1); + dl = (conf & MIPS32_CONFIG1_DL_MASK) >> MIPS32_CONFIG1_DL_SHIFT; - mips32_pracc_exec(ejtag_info, sizeof(code)/sizeof(code[0]), code, \ - sizeof(param_in)/sizeof(param_in[0]), param_in, count, param_out, 1); + /* dl encoding : dl=1 => 4 bytes, dl=2 => 8 bytes, etc... */ + clsiz = 0x2 << dl; -// count -= blocksize; -// addr += blocksize; -// bytesread += blocksize; - } + /* 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; - for (i = 0; i < count; i++) - { - buf[i] = param_out[i]; - } + retval = mips32_pracc_exec(ejtag_info, ARRAY_SIZE(code), code, 3, param_in, 0, NULL, 1); - free(param_out); + free(param_in); - return ERROR_OK; + return retval; } -int mips32_pracc_read_mem8(struct mips_ejtag *ejtag_info, uint32_t addr, int count, uint8_t *buf) +static int mips32_pracc_write_mem_generic(struct mips_ejtag *ejtag_info, uint32_t addr, int size, int count, void *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_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_ORI(11,11,LOWER16(MIPS32_PRACC_PARAM_OUT)), - MIPS32_NOP, - /* loop: */ - MIPS32_BEQ(0,10,9), /* beq 0, $10, end */ - MIPS32_NOP, - - 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) */ + uint32_t *code; + code = malloc((128 * 3 + 9) * sizeof(uint32_t)); /* alloc memory for the worst case */ + if (code == NULL) { + LOG_ERROR("Out of memory"); + return ERROR_FAIL; + } - MIPS32_ADDI(10,10,NEG16(1)), /* $10-- */ - MIPS32_ADDI(9,9,1), /* $9 += 1 */ - MIPS32_ADDI(11,11,4), /* $11 += 4 */ - MIPS32_NOP, - MIPS32_B(NEG16(9)), /* 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_MFC0(15,31,0), /* move COP0 DeSave to $15 */ - MIPS32_NOP, - MIPS32_B(NEG16(31)), /* b start */ - MIPS32_NOP, - }; + uint32_t *buf32 = buf; + uint16_t *buf16 = buf; + uint8_t *buf8 = buf; -// /* TODO remove array */ - uint32_t *param_out = malloc(count * sizeof(uint32_t)); int i; + int retval = ERROR_FAIL; + uint32_t *code_p; + uint32_t upper_base_addr, last_upper_base_addr; + int this_round_count; + int code_len; -// int retval; - int blocksize; - int bytesread; - uint32_t param_in[2]; + while (count) { + this_round_count = (count > 128) ? 128 : count; + last_upper_base_addr = UPPER16((addr + 0x8000)); + code_p = code; + + *code_p++ = MIPS32_MTC0(15, 31, 0); /* save $15 in DeSave */ + *code_p++ = MIPS32_LUI(15, last_upper_base_addr); /* load $15 with memory base address */ + code_len = 2; + + for (i = 0; i != this_round_count; i++) { + upper_base_addr = UPPER16((addr + 0x8000)); + if (last_upper_base_addr != upper_base_addr) { + *code_p++ = MIPS32_LUI(15, upper_base_addr); /* if needed, change upper address in $15*/ + code_len++; + last_upper_base_addr = upper_base_addr; + } - bytesread = 0; + if (size == 4) { /* for word write check if one half word is 0 and load it accordingly */ + if (LOWER16(*buf32) == 0) { + *code_p++ = MIPS32_LUI(8, UPPER16(*buf32)); /* load only upper value */ + code_len++; + } else if (UPPER16(*buf32) == 0) { + *code_p++ = MIPS32_ORI(8, 0, LOWER16(*buf32)); /* load only lower value */ + code_len++; + } else { + *code_p++ = MIPS32_LUI(8, UPPER16(*buf32)); /* load upper and lower */ + *code_p++ = MIPS32_ORI(8, 8, LOWER16(*buf32)); + code_len += 2; + } + *code_p++ = MIPS32_SW(8, LOWER16(addr), 15); /* store word to memory */ + code_len++; + buf32++; + + } else if (size == 2) { + *code_p++ = MIPS32_ORI(8, 0, *buf16); /* load lower value */ + *code_p++ = MIPS32_SH(8, LOWER16(addr), 15); /* store half word to memory */ + code_len += 2; + buf16++; + + } else { + *code_p++ = MIPS32_ORI(8, 0, *buf8); /* load lower value */ + *code_p++ = MIPS32_SB(8, LOWER16(addr), 15); /* store byte to memory */ + code_len += 2; + buf8++; + } -// while (count > 0) - { - blocksize = count; - if (count > 0x400) - blocksize = 0x400; + addr += size; + } - param_in[0] = addr; - param_in[1] = blocksize; + *code_p++ = MIPS32_LUI(8, UPPER16(ejtag_info->reg8)), /* restore upper 16 bits of reg 8 */ + *code_p++ = MIPS32_ORI(8, 8, LOWER16(ejtag_info->reg8)), /* restore lower 16 bits of reg 8 */ - mips32_pracc_exec(ejtag_info, sizeof(code)/sizeof(code[0]), code, \ - sizeof(param_in)/sizeof(param_in[0]), param_in, count, param_out, 1); + code_len += 4; + *code_p++ = MIPS32_B(NEG16(code_len - 1)); /* jump to start */ + *code_p = MIPS32_MFC0(15, 31, 0); /* restore $15 from DeSave */ -// count -= blocksize; -// addr += blocksize; -// bytesread += blocksize; - } + retval = mips32_pracc_exec(ejtag_info, code_len, code, 0, NULL, 0, NULL, 1); + if (retval != ERROR_OK) + goto exit; - for (i = 0; i < count; i++) - { - buf[i] = param_out[i]; + count -= this_round_count; } - free(param_out); - - return ERROR_OK; +exit: + free(code); + return retval; } int mips32_pracc_write_mem(struct mips_ejtag *ejtag_info, uint32_t addr, int size, int count, void *buf) { - switch (size) - { - case 1: - return mips32_pracc_write_mem8(ejtag_info, addr, count, (uint8_t*)buf); - case 2: - return mips32_pracc_write_mem16(ejtag_info, addr, count,(uint16_t*)buf); - case 4: - if (count == 1) - return mips32_pracc_write_u32(ejtag_info, addr, (uint32_t*)buf); - else - return mips32_pracc_write_mem32(ejtag_info, addr, count, (uint32_t*)buf); - } - - return ERROR_OK; -} - -int mips32_pracc_write_mem32(struct mips_ejtag *ejtag_info, uint32_t addr, int count, uint32_t *buf) -{ + int retval = mips32_pracc_write_mem_generic(ejtag_info, addr, size, count, buf); + if (retval != ERROR_OK) + return retval; -//NC: use destination pointer as loop counter (last address is in $10) - 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_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), //last address /* Load write count to $10 */ - MIPS32_ADDI(8,8,8), // $8 += 8 beginning of data - -//loop: - 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)), //was 9 BNE $10, 9, loop /* b loop */ - MIPS32_ADDI(8,8,4), //this instruction is part of the loop (one delay slot)! /* $8 += 4 */ - /* 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(21)), //was 30 /* b start */ - MIPS32_MFC0(15,31,0), /* move COP0 DeSave to $15 */ - MIPS32_NOP, //this one will not be executed - }; + /** + * If we are in the cachable regoion and cache is activated, + * we must clean D$ + 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; - /* TODO remove array */ - uint32_t *param_in = malloc((count + 2) * sizeof(uint32_t)); - param_in[0] = addr; - param_in[1] = addr + count * sizeof(uint32_t); //last address + if ((KSEGX(addr) == KSEG1) || ((addr >= 0xff200000) && (addr <= 0xff3fffff))) + return retval; /*Nothing to do*/ - memcpy(¶m_in[2], buf, count * sizeof(uint32_t)); + mips32_cp0_read(ejtag_info, &conf, 16, 0); - mips32_pracc_exec(ejtag_info, sizeof(code)/sizeof(code[0]), code, \ - count + 2, param_in, 0, NULL, 1); + 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 KSEG2: + case KSEG3: + cached = (conf & MIPS32_CONFIG0_K23_MASK) >> MIPS32_CONFIG0_K23_SHIFT; + break; + default: + /* what ? */ + break; + } - free(param_in); + /** + * 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 ERROR_OK; + return retval; } -int mips32_pracc_write_u32(struct mips_ejtag *ejtag_info, uint32_t addr, uint32_t *buf) +int mips32_pracc_write_regs(struct mips_ejtag *ejtag_info, uint32_t *regs) { - 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) */ + static const uint32_t cp0_write_code[] = { + MIPS32_MTC0(1, 12, 0), /* move $1 to status */ + MIPS32_MTLO(1), /* move $1 to lo */ + MIPS32_MTHI(1), /* move $1 to hi */ + MIPS32_MTC0(1, 8, 0), /* move $1 to badvaddr */ + MIPS32_MTC0(1, 13, 0), /* move $1 to cause*/ + MIPS32_MTC0(1, 24, 0), /* move $1 to depc (pc) */ + }; - 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 + uint32_t *code; + code = malloc((37 * 2 + 6 + 1) * sizeof(uint32_t)); /* alloc memory for the worst case */ + if (code == NULL) { + LOG_ERROR("Out of memory"); + return ERROR_FAIL; + } - MIPS32_SW(8,0,9), /* sw $8,0($9) */ + uint32_t *code_p = code; + int code_len = 0; + /* load registers 2 to 31 with lui an ori instructions, check if same instructions can be saved */ + for (int i = 2; i < 32; i++) { + if (LOWER16((regs[i])) == 0) { + *code_p++ = MIPS32_LUI(i, UPPER16((regs[i]))); /* if lower half word is 0, lui instruction only */ + code_len++; + } else if (UPPER16((regs[i])) == 0) { + *code_p++ = MIPS32_ORI(i, 0, LOWER16((regs[i]))); /* if upper half word is 0, ori with $0 only*/ + code_len++; + } else { + *code_p++ = MIPS32_LUI(i, UPPER16((regs[i]))); /* default, load with lui and ori instructions */ + *code_p++ = MIPS32_ORI(i, i, LOWER16((regs[i]))); + code_len += 2; + } + } - 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 */ - MIPS32_NOP, - }; + for (int i = 0; i != 6; i++) { + *code_p++ = MIPS32_LUI(1, UPPER16((regs[i + 32]))); /* load CPO value in $1, with lui and ori */ + *code_p++ = MIPS32_ORI(1, 1, LOWER16((regs[i + 32]))); + *code_p++ = cp0_write_code[i]; /* write value from $1 to CPO register */ + code_len += 3; + } - /* TODO remove array */ - uint32_t param_in[1 + 1]; - param_in[0] = addr; - param_in[1] = *buf; + *code_p++ = MIPS32_LUI(1, UPPER16((regs[1]))); /* load upper half word in $1 */ + code_len += 3; + *code_p++ = MIPS32_B(NEG16(code_len - 1)), /* b start */ + *code_p = MIPS32_ORI(1, 1, LOWER16((regs[1]))); /* load lower half word in $1 */ - mips32_pracc_exec(ejtag_info, sizeof(code)/sizeof(code[0]), code, \ - sizeof(param_in)/sizeof(param_in[0]),param_in, 0, NULL, 1); + int retval = mips32_pracc_exec(ejtag_info, code_len, code, 0, NULL, 0, NULL, 1); + free(code); - return ERROR_OK; + ejtag_info->reg8 = regs[8]; + ejtag_info->reg9 = regs[9]; + return retval; } -int mips32_pracc_write_mem16(struct mips_ejtag *ejtag_info, uint32_t addr, int count, uint16_t *buf) +int mips32_pracc_read_regs(struct mips_ejtag *ejtag_info, uint32_t *regs) { - 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 addr to $9 */ - MIPS32_LW(10,4,8), /* Load write count to $10 */ - MIPS32_ADDI(8,8,8), /* $8 += 8 */ - MIPS32_NOP, - /* loop: */ - MIPS32_BEQ(0,10,9), /* beq $0, $10, end */ - MIPS32_NOP, + static int cp0_read_code[] = { + MIPS32_MFC0(2, 12, 0), /* move status to $2 */ + MIPS32_MFLO(2), /* move lo to $2 */ + MIPS32_MFHI(2), /* move hi to $2 */ + MIPS32_MFC0(2, 8, 0), /* move badvaddr to $2 */ + MIPS32_MFC0(2, 13, 0), /* move cause to $2 */ + MIPS32_MFC0(2, 24, 0), /* move depc (pc) to $2 */ + }; - 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) */ + uint32_t *code; + code = malloc(49 * sizeof(uint32_t)); + if (code == NULL) { + LOG_ERROR("Out of memory"); + return ERROR_FAIL; + } - MIPS32_ADDI(10,10,NEG16(1)), /* $10-- */ - MIPS32_ADDI(9,9,2), /* $9 += 2 */ - MIPS32_ADDI(8,8,4), /* $8 += 4 */ + uint32_t *code_p = code; - MIPS32_NOP, - MIPS32_B(NEG16(9)), /* 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_MFC0(15,31,0), /* move COP0 DeSave to $15 */ - MIPS32_NOP, - MIPS32_B(NEG16(30)), /* b start */ - MIPS32_NOP, - }; + *code_p++ = MIPS32_MTC0(1, 31, 0), /* move $1 to COP0 DeSave */ + *code_p++ = MIPS32_LUI(1, PRACC_UPPER_BASE_ADDR); /* $1 = MIP32_PRACC_BASE_ADDR */ - /* TODO remove array */ - uint32_t *param_in = malloc((count + 2) * sizeof(uint32_t)); - int i; - param_in[0] = addr; - param_in[1] = count; + for (int i = 2; i != 32; i++) + *code_p++ = MIPS32_SW(i, PRACC_OUT_OFFSET + (i * 4), 1); /* store GPR's 2 to 31 */ - for (i = 0; i < count; i++) - { - param_in[i + 2] = buf[i]; + for (int i = 0; i != 6; i++) { + *code_p++ = cp0_read_code[i]; /* load COP0 needed registers to $2 */ + *code_p++ = MIPS32_SW(2, PRACC_OUT_OFFSET + (i + 32) * 4, 1); /* store COP0 registers from $2 to param out */ } - mips32_pracc_exec(ejtag_info, sizeof(code)/sizeof(code[0]), code, \ - count + 2, param_in, 0, NULL, 1); + *code_p++ = MIPS32_MFC0(2, 31, 0), /* move DeSave to $2, reg1 value */ + *code_p++ = MIPS32_SW(2, PRACC_OUT_OFFSET + 4, 1); /* store reg1 value from $2 to param out */ - free(param_in); + *code_p++ = MIPS32_LW(2, PRACC_OUT_OFFSET + 8, 1); /* restore $2 from param out (singularity) */ + *code_p++ = MIPS32_B(NEG16(48)); /* b start */ + *code_p = MIPS32_MFC0(1, 31, 0); /* move COP0 DeSave to $1 */ - return ERROR_OK; + int retval = mips32_pracc_exec(ejtag_info, 49, code, 0, NULL, MIPS32NUMCOREREGS, regs, 1); + free(code); + + ejtag_info->reg8 = regs[8]; + ejtag_info->reg9 = regs[9]; + return retval; } -int mips32_pracc_write_mem8(struct mips_ejtag *ejtag_info, uint32_t addr, int count, uint8_t *buf) +/* 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) { - 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 addr to $9 */ - MIPS32_LW(10,4,8), /* Load write count to $10 */ - MIPS32_ADDI(8,8,8), /* $8 += 8 */ - MIPS32_NOP, - /* loop: */ - MIPS32_BEQ(0,10,9), /* beq $0, $10, end */ + 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, + }; - 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) */ + int retval, i; + uint32_t val, ejtag_ctrl, address; - MIPS32_ADDI(10,10,NEG16(1)), /* $10-- */ - MIPS32_ADDI(9,9,1), /* $9 += 1 */ - MIPS32_ADDI(8,8,4), /* $8 += 4 */ + if (source->size < MIPS32_FASTDATA_HANDLER_SIZE) + return ERROR_TARGET_RESOURCE_NOT_AVAILABLE; - MIPS32_NOP, - MIPS32_B(NEG16(9)), /* 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_MFC0(15,31,0), /* move COP0 DeSave to $15 */ - MIPS32_NOP, - MIPS32_B(NEG16(30)), /* b start */ - MIPS32_NOP, - }; + 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 */ + } - /* TODO remove array */ - uint32_t *param_in = malloc((count + 2) * sizeof(uint32_t)); - int retval; - int i; - param_in[0] = addr; - param_in[1] = count; + /* write program into RAM */ + if (write_t != ejtag_info->fast_access_save) { + mips32_pracc_write_mem_generic(ejtag_info, source->address, 4, 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 < count; i++) - { - param_in[i + 2] = buf[i]; + for (i = 0; i < (int) ARRAY_SIZE(jmp_code); i++) { + retval = wait_for_pracc_rw(ejtag_info, &ejtag_ctrl); + if (retval != 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); } - retval = mips32_pracc_exec(ejtag_info, sizeof(code)/sizeof(code[0]), code, \ - count +2, param_in, 0, NULL, 1); + /* wait PrAcc pending bit for FASTDATA write */ + retval = wait_for_pracc_rw(ejtag_info, &ejtag_ctrl); + if (retval != 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; - free(param_in); + if (address != MIPS32_PRACC_FASTDATA_AREA) + return ERROR_FAIL; - 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); -int mips32_pracc_write_regs(struct mips_ejtag *ejtag_info, uint32_t *regs) -{ - static const uint32_t code[] = { - /* start: */ - MIPS32_LUI(2,UPPER16(MIPS32_PRACC_PARAM_IN)), /* $2 = MIPS32_PRACC_PARAM_IN */ - MIPS32_ORI(2,2,LOWER16(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(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 pc */ - - MIPS32_LW(2,2*4,1), /* lw $2,2*4($1) */ - MIPS32_LW(1,0,15), /* lw $1,($15) */ - MIPS32_MFC0(15,31,0), /* move COP0 DeSave to $15 */ - MIPS32_NOP, - MIPS32_B(NEG16(55)), /* b start */ - MIPS32_NOP, - }; + retval = wait_for_pracc_rw(ejtag_info, &ejtag_ctrl); + if (retval != ERROR_OK) + return retval; - int retval; + /* Send the load end address */ + val = addr + (count - 1) * 4; + mips_ejtag_set_instr(ejtag_info, EJTAG_INST_FASTDATA); + mips_ejtag_fastdata_scan(ejtag_info, 1, &val); - retval = mips32_pracc_exec(ejtag_info, sizeof(code)/sizeof(code[0]), code, \ - 38, regs, 0, NULL, 1); + for (i = 0; i < count; i++) { + retval = mips_ejtag_fastdata_scan(ejtag_info, write_t, buf++); + if (retval != ERROR_OK) + return retval; + } - return retval; -} + retval = jtag_execute_queue(); + if (retval != ERROR_OK) { + LOG_ERROR("fastdata load failed"); + return retval; + } -int mips32_pracc_read_regs(struct mips_ejtag *ejtag_info, uint32_t *regs) -{ - 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_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_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_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_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_MFC0(2,12,0), /* move status to $2 */ - 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_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), /* lw $2,($15) */ - MIPS32_LW(1,0,15), /* lw $1,($15) */ - MIPS32_MFC0(15,31,0), /* move COP0 DeSave to $15 */ - MIPS32_NOP, - MIPS32_B(NEG16(60)), /* b start */ - MIPS32_NOP, - }; + retval = wait_for_pracc_rw(ejtag_info, &ejtag_ctrl); + if (retval != ERROR_OK) + return retval; - int 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; - retval = mips32_pracc_exec(ejtag_info, sizeof(code)/sizeof(code[0]), code, \ - 0, NULL, 38, regs, 1); + if (address != MIPS32_PRACC_TEXT) + LOG_ERROR("mini program did not return to start"); return retval; }