+// SPDX-License-Identifier: GPL-2.0-or-later
+
/***************************************************************************
* Copyright (C) 2008 by Spencer Oliver *
* spen@spen-soft.co.uk *
* *
* 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 *
- * (at your option) any later version. *
- * *
- * This program is distributed in the hope that it will be useful, *
- * but WITHOUT ANY WARRANTY; without even the implied warranty of *
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the *
- * GNU General Public License for more details. *
- * *
- * You should have received a copy of the GNU General Public License *
- * along with this program; if not, write to the *
- * Free Software Foundation, Inc., *
- * 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. *
***************************************************************************/
/*
* 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.
*
#include "config.h"
#endif
+#include <helper/align.h>
#include <helper/time_support.h>
+#include <jtag/adapter.h>
+#include "mips_cpu.h"
#include "mips32.h"
#include "mips32_pracc.h"
-struct mips32_pracc_context {
- uint32_t *local_iparam;
- int num_iparam;
- uint32_t *local_oparam;
- int num_oparam;
- const uint32_t *code;
- int code_len;
- uint32_t stack[32];
- int stack_offset;
- struct mips_ejtag *ejtag_info;
-};
-
-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)
+static int wait_for_pracc_rw(struct mips_ejtag *ejtag_info)
{
- uint32_t ejtag_ctrl;
- long long then = timeval_ms();
- int timeout;
- int retval;
+ int64_t then = timeval_ms();
/* wait for the PrAcc to become "1" */
mips_ejtag_set_instr(ejtag_info, EJTAG_INST_CONTROL);
while (1) {
- ejtag_ctrl = ejtag_info->ejtag_ctrl;
- retval = mips_ejtag_drscan_32(ejtag_info, &ejtag_ctrl);
+ ejtag_info->pa_ctrl = ejtag_info->ejtag_ctrl;
+ int retval = mips_ejtag_drscan_32(ejtag_info, &ejtag_info->pa_ctrl);
if (retval != ERROR_OK)
return retval;
- if (ejtag_ctrl & EJTAG_CTRL_PRACC)
+ if (ejtag_info->pa_ctrl & EJTAG_CTRL_PRACC)
break;
- timeout = timeval_ms() - then;
+ int64_t timeout = timeval_ms() - then;
if (timeout > 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(struct mips32_pracc_context *ctx, uint32_t address)
+/* Shift in control and address for a new processor access, save them in ejtag_info */
+static int mips32_pracc_read_ctrl_addr(struct mips_ejtag *ejtag_info)
{
- struct mips_ejtag *ejtag_info = ctx->ejtag_info;
- int offset;
- uint32_t ejtag_ctrl, data;
-
- if ((address >= MIPS32_PRACC_PARAM_IN)
- && (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)) {
- 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)) {
- offset = (address - MIPS32_PRACC_TEXT) / 4;
- data = ctx->code[offset];
- } 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 {
- /* TODO: send JMP 0xFF200000 instruction. Hopefully processor jump back
- * to start of debug vector */
-
- LOG_ERROR("Error reading unexpected address 0x%8.8" PRIx32 "", address);
- return ERROR_JTAG_DEVICE_ERROR;
- }
+ int retval = wait_for_pracc_rw(ejtag_info);
+ if (retval != ERROR_OK)
+ return retval;
- /* Send the data out */
- mips_ejtag_set_instr(ctx->ejtag_info, EJTAG_INST_DATA);
- mips_ejtag_drscan_32_out(ctx->ejtag_info, data);
+ mips_ejtag_set_instr(ejtag_info, EJTAG_INST_ADDRESS);
- /* 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);
- mips_ejtag_drscan_32_out(ctx->ejtag_info, ejtag_ctrl);
+ ejtag_info->pa_addr = 0;
+ return mips_ejtag_drscan_32(ejtag_info, &ejtag_info->pa_addr);
+}
- return jtag_execute_queue();
+/* Finish processor access */
+static void mips32_pracc_finish(struct mips_ejtag *ejtag_info)
+{
+ uint32_t ctrl = ejtag_info->ejtag_ctrl & ~EJTAG_CTRL_PRACC;
+ mips_ejtag_set_instr(ejtag_info, EJTAG_INST_CONTROL);
+ mips_ejtag_drscan_32_out(ejtag_info, ctrl);
}
-static int mips32_pracc_exec_write(struct mips32_pracc_context *ctx, uint32_t address)
+static int mips32_pracc_clean_text_jump(struct mips_ejtag *ejtag_info)
{
- uint32_t ejtag_ctrl, data;
- int offset;
- struct mips_ejtag *ejtag_info = ctx->ejtag_info;
- int retval;
+ uint32_t jt_code = MIPS32_J(ejtag_info->isa, MIPS32_PRACC_TEXT);
+ pracc_swap16_array(ejtag_info, &jt_code, 1);
+ /* do 3 0/nops to clean pipeline before a jump to pracc text, NOP in delay slot */
+ for (int i = 0; i != 5; i++) {
+ /* Wait for pracc */
+ int retval = wait_for_pracc_rw(ejtag_info);
+ if (retval != ERROR_OK)
+ return 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;
+ /* Data or instruction out */
+ mips_ejtag_set_instr(ejtag_info, EJTAG_INST_DATA);
+ uint32_t data = (i == 3) ? jt_code : MIPS32_NOP;
+ mips_ejtag_drscan_32_out(ejtag_info, data);
- /* Clear access pending bit */
- ejtag_ctrl = ejtag_info->ejtag_ctrl & ~EJTAG_CTRL_PRACC;
- mips_ejtag_set_instr(ctx->ejtag_info, EJTAG_INST_CONTROL);
- mips_ejtag_drscan_32_out(ctx->ejtag_info, ejtag_ctrl);
+ /* finish pa */
+ mips32_pracc_finish(ejtag_info);
+ }
- retval = jtag_execute_queue();
- if (retval != ERROR_OK)
- return retval;
+ if (ejtag_info->mode != 0) /* async mode support only for MIPS ... */
+ return ERROR_OK;
- 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)) {
- offset = (address - MIPS32_PRACC_PARAM_OUT) / 4;
- ctx->local_oparam[offset] = data;
- } 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 0x%8.8" PRIx32 "", address);
- return ERROR_JTAG_DEVICE_ERROR;
+ for (int i = 0; i != 2; i++) {
+ int retval = mips32_pracc_read_ctrl_addr(ejtag_info);
+ if (retval != ERROR_OK)
+ return retval;
+
+ if (ejtag_info->pa_addr != MIPS32_PRACC_TEXT) { /* LEXRA/BMIPS ?, shift out another NOP, max 2 */
+ mips_ejtag_set_instr(ejtag_info, EJTAG_INST_DATA);
+ mips_ejtag_drscan_32_out(ejtag_info, MIPS32_NOP);
+ mips32_pracc_finish(ejtag_info);
+ } else
+ break;
}
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)
+static int mips32_pracc_exec(struct mips_ejtag *ejtag_info, struct pracc_queue_info *ctx,
+ uint32_t *param_out, bool check_last)
{
- uint32_t ejtag_ctrl;
- uint32_t address;
- struct mips32_pracc_context ctx;
+ int code_count = 0;
+ int store_pending = 0; /* increases with every store instr at dmseg, decreases with every store pa */
+ uint32_t max_store_addr = 0; /* for store pa address testing */
+ bool restart = 0; /* restarting control */
+ int restart_count = 0;
+ uint32_t instr = 0;
+ bool final_check = 0; /* set to 1 if in final checks after function code shifted out */
+ bool pass = 0; /* to check the pass through pracc text after function code sent */
int retval;
- int pass = 0;
-
- ctx.local_iparam = param_in;
- ctx.local_oparam = param_out;
- ctx.num_iparam = num_param_in;
- ctx.num_oparam = num_param_out;
- ctx.code = code;
- ctx.code_len = code_len;
- ctx.ejtag_info = ejtag_info;
- ctx.stack_offset = 0;
while (1) {
- retval = wait_for_pracc_rw(ejtag_info, &ejtag_ctrl);
- if (retval != ERROR_OK)
- return retval;
+ if (restart) {
+ if (restart_count < 3) { /* max 3 restarts allowed */
+ retval = mips32_pracc_clean_text_jump(ejtag_info);
+ if (retval != ERROR_OK)
+ return retval;
+ } else
+ return ERROR_JTAG_DEVICE_ERROR;
+ restart_count++;
+ restart = 0;
+ code_count = 0;
+ LOG_DEBUG("restarting code");
+ }
- address = 0;
- mips_ejtag_set_instr(ejtag_info, EJTAG_INST_ADDRESS);
- retval = mips_ejtag_drscan_32(ejtag_info, &address);
+ retval = mips32_pracc_read_ctrl_addr(ejtag_info); /* update current pa info: control and address */
if (retval != ERROR_OK)
return retval;
- /* Check for read or write */
- if (ejtag_ctrl & EJTAG_CTRL_PRNW) {
- retval = mips32_pracc_exec_write(&ctx, address);
+ /* Check for read or write access */
+ if (ejtag_info->pa_ctrl & EJTAG_CTRL_PRNW) { /* write/store access */
+ /* Check for pending store from a previous store instruction at dmseg */
+ if (store_pending == 0) {
+ LOG_DEBUG("unexpected write at address %" PRIx32, ejtag_info->pa_addr);
+ if (code_count < 2) { /* allow for restart */
+ restart = 1;
+ continue;
+ } else
+ return ERROR_JTAG_DEVICE_ERROR;
+ } else {
+ /* check address */
+ if (ejtag_info->pa_addr < MIPS32_PRACC_PARAM_OUT ||
+ ejtag_info->pa_addr > max_store_addr) {
+ LOG_DEBUG("writing at unexpected address %" PRIx32, ejtag_info->pa_addr);
+ return ERROR_JTAG_DEVICE_ERROR;
+ }
+ }
+ /* read data */
+ uint32_t data = 0;
+ mips_ejtag_set_instr(ejtag_info, EJTAG_INST_DATA);
+ retval = mips_ejtag_drscan_32(ejtag_info, &data);
if (retval != ERROR_OK)
return retval;
- } 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;
- retval = mips32_pracc_exec_read(&ctx, address);
- if (retval != ERROR_OK)
- return retval;
+ /* store data at param out, address based offset */
+ param_out[(ejtag_info->pa_addr - MIPS32_PRACC_PARAM_OUT) / 4] = data;
+ store_pending--;
+
+ } else { /* read/fetch access */
+ if (!final_check) { /* executing function code */
+ /* check address */
+ if (ejtag_info->pa_addr != (MIPS32_PRACC_TEXT + code_count * 4)) {
+ LOG_DEBUG("reading at unexpected address %" PRIx32 ", expected %x",
+ ejtag_info->pa_addr, MIPS32_PRACC_TEXT + code_count * 4);
+
+ /* restart code execution only in some cases */
+ if (code_count == 1 && ejtag_info->pa_addr == MIPS32_PRACC_TEXT &&
+ restart_count == 0) {
+ LOG_DEBUG("restarting, without clean jump");
+ restart_count++;
+ code_count = 0;
+ continue;
+ } else if (code_count < 2) {
+ restart = 1;
+ continue;
+ }
+ return ERROR_JTAG_DEVICE_ERROR;
+ }
+ /* check for store instruction at dmseg */
+ uint32_t store_addr = ctx->pracc_list[code_count].addr;
+ if (store_addr != 0) {
+ if (store_addr > max_store_addr)
+ max_store_addr = store_addr;
+ store_pending++;
+ }
+
+ instr = ctx->pracc_list[code_count++].instr;
+ if (code_count == ctx->code_count) /* last instruction, start final check */
+ final_check = 1;
+
+ } else { /* final check after function code shifted out */
+ /* check address */
+ if (ejtag_info->pa_addr == MIPS32_PRACC_TEXT) {
+ if (!pass) { /* first pass through pracc text */
+ if (store_pending == 0) /* done, normal exit */
+ return ERROR_OK;
+ pass = 1; /* pracc text passed */
+ code_count = 0; /* restart code count */
+ } else {
+ LOG_DEBUG("unexpected second pass through pracc text");
+ return ERROR_JTAG_DEVICE_ERROR;
+ }
+ } else {
+ if (ejtag_info->pa_addr != (MIPS32_PRACC_TEXT + code_count * 4)) {
+ LOG_DEBUG("unexpected read address in final check: %"
+ PRIx32 ", expected: %x", ejtag_info->pa_addr,
+ MIPS32_PRACC_TEXT + code_count * 4);
+ return ERROR_JTAG_DEVICE_ERROR;
+ }
+ }
+ if (!pass) {
+ if ((code_count - ctx->code_count) > 1) { /* allow max 2 instr delay slot */
+ LOG_DEBUG("failed to jump back to pracc text");
+ return ERROR_JTAG_DEVICE_ERROR;
+ }
+ } else
+ if (code_count > 10) { /* enough, abandon */
+ LOG_DEBUG("execution abandoned, store pending: %d", store_pending);
+ return ERROR_JTAG_DEVICE_ERROR;
+ }
+ instr = MIPS32_NOP; /* shift out NOPs instructions */
+ code_count++;
+ }
+
+ /* Send instruction out */
+ mips_ejtag_set_instr(ejtag_info, EJTAG_INST_DATA);
+ mips_ejtag_drscan_32_out(ejtag_info, instr);
}
+ /* finish processor access, let the processor eat! */
+ mips32_pracc_finish(ejtag_info);
- if (cycle == 0)
- break;
- }
+ if (final_check && !check_last) /* last instr, don't check, execute and exit */
+ return jtag_execute_queue();
- /* stack sanity check */
- if (ctx.stack_offset != 0)
- LOG_DEBUG("Pracc Stack not zero");
+ if (store_pending == 0 && pass) { /* store access done, but after passing pracc text */
+ LOG_DEBUG("warning: store access pass pracc text");
+ return ERROR_OK;
+ }
+ }
+}
- return ERROR_OK;
+inline void pracc_queue_init(struct pracc_queue_info *ctx)
+{
+ ctx->retval = ERROR_OK;
+ ctx->code_count = 0;
+ ctx->store_count = 0;
+ ctx->max_code = 0;
+ ctx->pracc_list = NULL;
+ ctx->isa = ctx->ejtag_info->isa ? 1 : 0;
}
-int mips32_pracc_read_mem(struct mips_ejtag *ejtag_info, uint32_t addr, int size, int count, void *buf)
+void pracc_add(struct pracc_queue_info *ctx, uint32_t addr, uint32_t instr)
{
- 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);
+ if (ctx->retval != ERROR_OK) /* On previous out of memory, return */
+ return;
+ if (ctx->code_count == ctx->max_code) {
+ void *p = realloc(ctx->pracc_list, sizeof(struct pa_list) * (ctx->max_code + PRACC_BLOCK));
+ if (p) {
+ ctx->max_code += PRACC_BLOCK;
+ ctx->pracc_list = p;
+ } else {
+ ctx->retval = ERROR_FAIL; /* Out of memory */
+ return;
+ }
}
-
- return ERROR_OK;
+ ctx->pracc_list[ctx->code_count].instr = instr;
+ ctx->pracc_list[ctx->code_count++].addr = addr;
+ if (addr)
+ ctx->store_count++;
}
-static int mips32_pracc_read_mem32(struct mips_ejtag *ejtag_info, uint32_t addr, int count, uint32_t *buf)
+static void pracc_add_li32(struct pracc_queue_info *ctx, uint32_t reg_num, uint32_t data, bool optimize)
{
- 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)),
- /* loop: */
- MIPS32_BEQ(0, 10, 8), /* beq 0, $10, end */
- MIPS32_NOP,
-
- 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), /* 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 */
- };
-
- int retval = ERROR_OK;
- int blocksize;
- int wordsread;
- uint32_t param_in[2];
-
- wordsread = 0;
-
- while (count > 0) {
- blocksize = count;
- if (count > 0x400)
- blocksize = 0x400;
-
- param_in[0] = addr;
- param_in[1] = blocksize;
-
- retval = mips32_pracc_exec(ejtag_info, ARRAY_SIZE(code), code,
- ARRAY_SIZE(param_in), param_in, blocksize, &buf[wordsread], 1);
- if (retval != ERROR_OK)
- return retval;
-
- count -= blocksize;
- addr += blocksize*sizeof(uint32_t);
- wordsread += blocksize;
+ if (LOWER16(data) == 0 && optimize)
+ pracc_add(ctx, 0, MIPS32_LUI(ctx->isa, reg_num, UPPER16(data))); /* load only upper value */
+ else if (UPPER16(data) == 0 && optimize)
+ pracc_add(ctx, 0, MIPS32_ORI(ctx->isa, reg_num, 0, LOWER16(data))); /* load only lower */
+ else {
+ pracc_add(ctx, 0, MIPS32_LUI(ctx->isa, reg_num, UPPER16(data))); /* load upper and lower */
+ pracc_add(ctx, 0, MIPS32_ORI(ctx->isa, reg_num, reg_num, LOWER16(data)));
}
-
- return retval;
}
-static int mips32_pracc_read_u32(struct mips_ejtag *ejtag_info, uint32_t addr, uint32_t *buf)
+inline void pracc_queue_free(struct pracc_queue_info *ctx)
{
- 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;
-
- retval = mips32_pracc_exec(ejtag_info, ARRAY_SIZE(code), code,
- ARRAY_SIZE(param_in), param_in, 1, buf, 1);
- if (retval != ERROR_OK)
- return retval;
-
- return retval;
+ free(ctx->pracc_list);
}
-static int mips32_pracc_read_mem16(struct mips_ejtag *ejtag_info, uint32_t addr, int count, uint16_t *buf)
+int mips32_pracc_queue_exec(struct mips_ejtag *ejtag_info, struct pracc_queue_info *ctx,
+ uint32_t *buf, bool check_last)
{
- 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)),
- /* loop: */
- MIPS32_BEQ(0, 10, 8), /* beq 0, $10, end */
- MIPS32_NOP,
-
- 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 */
- uint32_t *param_out = malloc(count * sizeof(uint32_t));
- if (param_out == NULL) {
+ if (ctx->retval != ERROR_OK) {
LOG_ERROR("Out of memory");
return ERROR_FAIL;
}
- int retval = ERROR_OK;
- int blocksize;
- int hwordsread = 0;
- uint32_t param_in[2];
+ if (ejtag_info->isa && ejtag_info->endianness)
+ for (int i = 0; i != ctx->code_count; i++)
+ ctx->pracc_list[i].instr = SWAP16(ctx->pracc_list[i].instr);
- while (count > 0) {
- blocksize = count;
- if (count > 0x400)
- blocksize = 0x400;
+ if (ejtag_info->mode == 0)
+ return mips32_pracc_exec(ejtag_info, ctx, buf, check_last);
- param_in[0] = addr;
- param_in[1] = blocksize;
+ union scan_in {
+ uint8_t scan_96[12];
+ struct {
+ uint8_t ctrl[4];
+ uint8_t data[4];
+ uint8_t addr[4];
+ } scan_32;
- retval = mips32_pracc_exec(ejtag_info, ARRAY_SIZE(code), code,
- ARRAY_SIZE(param_in), param_in, blocksize, ¶m_out[hwordsread], 1);
+ } *scan_in = malloc(sizeof(union scan_in) * (ctx->code_count + ctx->store_count));
+ if (!scan_in) {
+ LOG_ERROR("Out of memory");
+ return ERROR_FAIL;
+ }
- if (retval != ERROR_OK)
- return retval;
+ unsigned num_clocks =
+ ((uint64_t)(ejtag_info->scan_delay) * adapter_get_speed_khz() + 500000) / 1000000;
- count -= blocksize;
- addr += blocksize*sizeof(uint16_t);
- hwordsread += blocksize;
- }
+ uint32_t ejtag_ctrl = ejtag_info->ejtag_ctrl & ~EJTAG_CTRL_PRACC;
+ mips_ejtag_set_instr(ejtag_info, EJTAG_INST_ALL);
+
+ int scan_count = 0;
+ for (int i = 0; i != ctx->code_count; i++) {
+ jtag_add_clocks(num_clocks);
+ mips_ejtag_add_scan_96(ejtag_info, ejtag_ctrl, ctx->pracc_list[i].instr,
+ scan_in[scan_count++].scan_96);
- int i;
- for (i = 0; i < hwordsread; i++)
- buf[i] = param_out[i];
+ /* Check store address from previous instruction, if not the first */
+ if (i > 0 && ctx->pracc_list[i - 1].addr) {
+ jtag_add_clocks(num_clocks);
+ mips_ejtag_add_scan_96(ejtag_info, ejtag_ctrl, 0, scan_in[scan_count++].scan_96);
+ }
+ }
- free(param_out);
+ int retval = jtag_execute_queue(); /* execute queued scans */
+ if (retval != ERROR_OK)
+ goto exit;
+
+ uint32_t fetch_addr = MIPS32_PRACC_TEXT; /* start address */
+ scan_count = 0;
+ for (int i = 0; i != ctx->code_count; i++) { /* verify every pracc access */
+ /* check pracc bit */
+ ejtag_ctrl = buf_get_u32(scan_in[scan_count].scan_32.ctrl, 0, 32);
+ uint32_t addr = buf_get_u32(scan_in[scan_count].scan_32.addr, 0, 32);
+ if (!(ejtag_ctrl & EJTAG_CTRL_PRACC)) {
+ LOG_ERROR("Error: access not pending count: %d", scan_count);
+ retval = ERROR_FAIL;
+ goto exit;
+ }
+ if (ejtag_ctrl & EJTAG_CTRL_PRNW) {
+ LOG_ERROR("Not a fetch/read access, count: %d", scan_count);
+ retval = ERROR_FAIL;
+ goto exit;
+ }
+ if (addr != fetch_addr) {
+ LOG_ERROR("Fetch addr mismatch, read: %" PRIx32 " expected: %" PRIx32 " count: %d",
+ addr, fetch_addr, scan_count);
+ retval = ERROR_FAIL;
+ goto exit;
+ }
+ fetch_addr += 4;
+ scan_count++;
+
+ /* check if previous instruction is a store instruction at dmesg */
+ if (i > 0 && ctx->pracc_list[i - 1].addr) {
+ uint32_t store_addr = ctx->pracc_list[i - 1].addr;
+ ejtag_ctrl = buf_get_u32(scan_in[scan_count].scan_32.ctrl, 0, 32);
+ addr = buf_get_u32(scan_in[scan_count].scan_32.addr, 0, 32);
+
+ if (!(ejtag_ctrl & EJTAG_CTRL_PRNW)) {
+ LOG_ERROR("Not a store/write access, count: %d", scan_count);
+ retval = ERROR_FAIL;
+ goto exit;
+ }
+ if (addr != store_addr) {
+ LOG_ERROR("Store address mismatch, read: %" PRIx32 " expected: %" PRIx32 " count: %d",
+ addr, store_addr, scan_count);
+ retval = ERROR_FAIL;
+ goto exit;
+ }
+ int buf_index = (addr - MIPS32_PRACC_PARAM_OUT) / 4;
+ buf[buf_index] = buf_get_u32(scan_in[scan_count].scan_32.data, 0, 32);
+ scan_count++;
+ }
+ }
+exit:
+ free(scan_in);
return retval;
}
-static int mips32_pracc_read_mem8(struct mips_ejtag *ejtag_info, uint32_t addr, int count, uint8_t *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_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)),
- /* loop: */
- MIPS32_BEQ(0, 10, 8), /* 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) */
-
- 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), /* 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 */
- };
+ struct pracc_queue_info ctx = {.ejtag_info = ejtag_info};
+ pracc_queue_init(&ctx);
+
+ pracc_add(&ctx, 0, MIPS32_LUI(ctx.isa, 15, PRACC_UPPER_BASE_ADDR)); /* $15 = MIPS32_PRACC_BASE_ADDR */
+ pracc_add(&ctx, 0, MIPS32_LUI(ctx.isa, 8, UPPER16((addr + 0x8000)))); /* load $8 with modified upper addr */
+ pracc_add(&ctx, 0, MIPS32_LW(ctx.isa, 8, LOWER16(addr), 8)); /* lw $8, LOWER16(addr)($8) */
+ if (mips32_cpu_support_sync(ejtag_info))
+ pracc_add(&ctx, 0, MIPS32_SYNC(ctx.isa));
+ pracc_add(&ctx, MIPS32_PRACC_PARAM_OUT,
+ MIPS32_SW(ctx.isa, 8, PRACC_OUT_OFFSET, 15)); /* sw $8,PRACC_OUT_OFFSET($15) */
+ pracc_add_li32(&ctx, 8, ejtag_info->reg8, 0); /* restore $8 */
+ pracc_add(&ctx, 0, MIPS32_B(ctx.isa, NEG16((ctx.code_count + 1) << ctx.isa))); /* jump to start */
+ pracc_add(&ctx, 0, MIPS32_MFC0(ctx.isa, 15, 31, 0)); /* move COP0 DeSave to $15 */
+
+ ctx.retval = mips32_pracc_queue_exec(ejtag_info, &ctx, buf, 1);
+ pracc_queue_free(&ctx);
+ return ctx.retval;
+}
- /* TODO remove array */
- uint32_t *param_out = malloc(count * sizeof(uint32_t));
- if (param_out == NULL) {
- LOG_ERROR("Out of memory");
- return ERROR_FAIL;
+int mips32_pracc_read_mem(struct mips_ejtag *ejtag_info, uint32_t addr, int size, int count, void *buf)
+{
+ if (count == 1 && size == 4)
+ return mips32_pracc_read_u32(ejtag_info, addr, (uint32_t *)buf);
+
+ struct pracc_queue_info ctx = {.ejtag_info = ejtag_info};
+ pracc_queue_init(&ctx);
+
+ uint32_t *data = NULL;
+ if (size != 4) {
+ data = malloc(256 * sizeof(uint32_t));
+ if (!data) {
+ LOG_ERROR("Out of memory");
+ goto exit;
+ }
}
- int retval = ERROR_OK;
- int blocksize;
- uint32_t param_in[2];
- int bytesread = 0;
+ uint32_t *buf32 = buf;
+ uint16_t *buf16 = buf;
+ uint8_t *buf8 = buf;
- while (count > 0) {
- blocksize = count;
- if (count > 0x400)
- blocksize = 0x400;
+ while (count) {
+ ctx.code_count = 0;
+ ctx.store_count = 0;
- param_in[0] = addr;
- param_in[1] = blocksize;
+ int this_round_count = (count > 256) ? 256 : count;
+ uint32_t last_upper_base_addr = UPPER16((addr + 0x8000));
- retval = mips32_pracc_exec(ejtag_info, ARRAY_SIZE(code), code,
- ARRAY_SIZE(param_in), param_in, count, ¶m_out[bytesread], 1);
+ pracc_add(&ctx, 0, MIPS32_LUI(ctx.isa, 15, PRACC_UPPER_BASE_ADDR)); /* $15 = MIPS32_PRACC_BASE_ADDR */
+ pracc_add(&ctx, 0, MIPS32_LUI(ctx.isa, 9, last_upper_base_addr)); /* upper memory addr to $9 */
- if (retval != ERROR_OK)
- return retval;
+ for (int i = 0; i != this_round_count; i++) { /* Main code loop */
+ uint32_t upper_base_addr = UPPER16((addr + 0x8000));
+ if (last_upper_base_addr != upper_base_addr) { /* if needed, change upper addr in $9 */
+ pracc_add(&ctx, 0, MIPS32_LUI(ctx.isa, 9, upper_base_addr));
+ last_upper_base_addr = upper_base_addr;
+ }
- count -= blocksize;
- addr += blocksize;
- bytesread += blocksize;
- }
- int i;
- for (i = 0; i < bytesread; i++)
- buf[i] = param_out[i];
+ if (size == 4) /* load from memory to $8 */
+ pracc_add(&ctx, 0, MIPS32_LW(ctx.isa, 8, LOWER16(addr), 9));
+ else if (size == 2)
+ pracc_add(&ctx, 0, MIPS32_LHU(ctx.isa, 8, LOWER16(addr), 9));
+ else
+ pracc_add(&ctx, 0, MIPS32_LBU(ctx.isa, 8, LOWER16(addr), 9));
- free(param_out);
- return retval;
+ if (mips32_cpu_support_sync(ejtag_info))
+ pracc_add(&ctx, 0, MIPS32_SYNC(ctx.isa));
+ pracc_add(&ctx, MIPS32_PRACC_PARAM_OUT + i * 4, /* store $8 at param out */
+ MIPS32_SW(ctx.isa, 8, PRACC_OUT_OFFSET + i * 4, 15));
+ addr += size;
+ }
+ pracc_add_li32(&ctx, 8, ejtag_info->reg8, 0); /* restore $8 */
+ pracc_add_li32(&ctx, 9, ejtag_info->reg9, 0); /* restore $9 */
+
+ pracc_add(&ctx, 0, MIPS32_B(ctx.isa, NEG16((ctx.code_count + 1) << ctx.isa))); /* jump to start */
+ pracc_add(&ctx, 0, MIPS32_MFC0(ctx.isa, 15, 31, 0)); /* restore $15 from DeSave */
+
+ if (size == 4) {
+ ctx.retval = mips32_pracc_queue_exec(ejtag_info, &ctx, buf32, 1);
+ if (ctx.retval != ERROR_OK)
+ goto exit;
+ buf32 += this_round_count;
+ } else {
+ ctx.retval = mips32_pracc_queue_exec(ejtag_info, &ctx, data, 1);
+ if (ctx.retval != ERROR_OK)
+ goto exit;
+
+ uint32_t *data_p = data;
+ for (int i = 0; i != this_round_count; i++) {
+ if (size == 2)
+ *buf16++ = *data_p++;
+ else
+ *buf8++ = *data_p++;
+ }
+ }
+ count -= this_round_count;
+ }
+exit:
+ pracc_queue_free(&ctx);
+ free(data);
+ return ctx.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 3th 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 */
- MIPS32_SW(8, PRACC_STACK_OFFSET, 15), /* sw $8,PRACC_STACK_OFFSET($15) */
-
- /* 3 */ 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_LW(8, PRACC_STACK_OFFSET, 15), /* lw $8,PRACC_STACK_OFFSET($15) */
- 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[3] |= (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);
+ struct pracc_queue_info ctx = {.ejtag_info = ejtag_info};
+ pracc_queue_init(&ctx);
+
+ pracc_add(&ctx, 0, MIPS32_LUI(ctx.isa, 15, PRACC_UPPER_BASE_ADDR)); /* $15 = MIPS32_PRACC_BASE_ADDR */
+ if (mips32_cpu_support_hazard_barrier(ejtag_info))
+ pracc_add(&ctx, 0, MIPS32_EHB(ctx.isa));
+ pracc_add(&ctx, 0, MIPS32_MFC0(ctx.isa, 8, cp0_reg, cp0_sel)); /* move cp0 reg / sel to $8 */
+ pracc_add(&ctx, MIPS32_PRACC_PARAM_OUT,
+ MIPS32_SW(ctx.isa, 8, PRACC_OUT_OFFSET, 15)); /* store $8 to pracc_out */
+ pracc_add(&ctx, 0, MIPS32_MFC0(ctx.isa, 15, 31, 0)); /* restore $15 from DeSave */
+ pracc_add(&ctx, 0, MIPS32_LUI(ctx.isa, 8, UPPER16(ejtag_info->reg8))); /* restore upper 16 bits of $8 */
+ pracc_add(&ctx, 0, MIPS32_B(ctx.isa, NEG16((ctx.code_count + 1) << ctx.isa))); /* jump to start */
+ pracc_add(&ctx, 0, MIPS32_ORI(ctx.isa, 8, 8, LOWER16(ejtag_info->reg8))); /* restore lower 16 bits of $8 */
+
+ ctx.retval = mips32_pracc_queue_exec(ejtag_info, &ctx, val, 1);
+ pracc_queue_free(&ctx);
+ return ctx.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(val)), /* Load val to $15 */
- MIPS32_ORI(15, 15, LOWER16(val)),
+ struct pracc_queue_info ctx = {.ejtag_info = ejtag_info};
+ pracc_queue_init(&ctx);
- /* 3 */ MIPS32_MTC0(15, 0, 0), /* move $15 to COP0 [cp0_reg select] */
+ pracc_add_li32(&ctx, 15, val, 0); /* Load val to $15 */
- MIPS32_B(NEG16(5)), /* b start */
- MIPS32_MFC0(15, 31, 0), /* move COP0 DeSave to $15 */
- };
+ pracc_add(&ctx, 0, MIPS32_MTC0(ctx.isa, 15, cp0_reg, cp0_sel)); /* write $15 to cp0 reg / sel */
+ if (mips32_cpu_support_hazard_barrier(ejtag_info))
+ pracc_add(&ctx, 0, MIPS32_EHB(ctx.isa));
+ pracc_add(&ctx, 0, MIPS32_B(ctx.isa, NEG16((ctx.code_count + 1) << ctx.isa))); /* jump to start */
+ pracc_add(&ctx, 0, MIPS32_MFC0(ctx.isa, 15, 31, 0)); /* restore $15 from DeSave */
- /**
- * 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 */
+ ctx.retval = mips32_pracc_queue_exec(ejtag_info, &ctx, NULL, 1);
+ pracc_queue_free(&ctx);
+ return ctx.retval;
+}
- return mips32_pracc_exec(ejtag_info, ARRAY_SIZE(code), code, 0, NULL, 0, NULL, 1);
+int mips32_cp1_control_read(struct mips_ejtag *ejtag_info, uint32_t *val, uint32_t cp1_c_reg)
+{
+ struct pracc_queue_info ctx = {.ejtag_info = ejtag_info};
+ pracc_queue_init(&ctx);
+
+ pracc_add(&ctx, 0, MIPS32_LUI(ctx.isa, 15, PRACC_UPPER_BASE_ADDR)); /* $15 = MIPS32_PRACC_BASE_ADDR */
+ pracc_add(&ctx, 0, MIPS32_EHB(ctx.isa));
+ pracc_add(&ctx, 0, MIPS32_CFC1(ctx.isa, 8, cp1_c_reg)); /* move cp1c reg to $8 */
+ pracc_add(&ctx, MIPS32_PRACC_PARAM_OUT,
+ MIPS32_SW(ctx.isa, 8, PRACC_OUT_OFFSET, 15)); /* store $8 to pracc_out */
+ pracc_add(&ctx, 0, MIPS32_MFC0(ctx.isa, 15, 31, 0)); /* restore $15 from DeSave */
+ pracc_add(&ctx, 0, MIPS32_LUI(ctx.isa, 8, UPPER16(ejtag_info->reg8))); /* restore upper 16 bits of $8 */
+ pracc_add(&ctx, 0, MIPS32_B(ctx.isa, NEG16((ctx.code_count + 1) << ctx.isa))); /* jump to start */
+ pracc_add(&ctx, 0, MIPS32_ORI(ctx.isa, 8, 8, LOWER16(ejtag_info->reg8))); /* restore lower 16 bits of $8 */
+
+ ctx.retval = mips32_pracc_queue_exec(ejtag_info, &ctx, val, 1);
+ pracc_queue_free(&ctx);
+ return ctx.retval;
}
/**
* 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.
+ * If the cache coherency attribute (CCA) is set to zero, it's a write through cache, there is no need
+ * to write back.
*
* 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.
+ * That is, it arranges a D-cache write-back (if CCA = 3) 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”.
+ * The line size is obtained with the rdhwr SYNCI_Step in release 2 or from cp0 config 1 register in release 1.
*/
-static int mips32_pracc_sync_cache(struct mips_ejtag *ejtag_info,
- uint32_t start_addr, uint32_t end_addr)
+static int mips32_pracc_synchronize_cache(struct mips_ejtag *ejtag_info,
+ uint32_t start_addr, uint32_t end_addr, int cached, int rel)
{
- 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 */
- };
+ struct pracc_queue_info ctx = {.ejtag_info = ejtag_info};
+ pracc_queue_init(&ctx);
- /* TODO remove array */
- uint32_t *param_in = malloc(2 * sizeof(uint32_t));
- int retval;
- param_in[0] = start_addr;
- param_in[1] = end_addr;
+ /** Find cache line size in bytes */
+ uint32_t clsiz;
+ if (rel) { /* Release 2 (rel = 1) */
+ pracc_add(&ctx, 0, MIPS32_LUI(ctx.isa, 15, PRACC_UPPER_BASE_ADDR)); /* $15 = MIPS32_PRACC_BASE_ADDR */
- retval = mips32_pracc_exec(ejtag_info, ARRAY_SIZE(code), code, 2, param_in, 0, NULL, 1);
+ pracc_add(&ctx, 0, MIPS32_RDHWR(ctx.isa, 8, MIPS32_SYNCI_STEP)); /* load synci_step value to $8 */
- free(param_in);
+ pracc_add(&ctx, MIPS32_PRACC_PARAM_OUT,
+ MIPS32_SW(ctx.isa, 8, PRACC_OUT_OFFSET, 15)); /* store $8 to pracc_out */
- return retval;
-}
+ pracc_add_li32(&ctx, 8, ejtag_info->reg8, 0); /* restore $8 */
-/**
- * \b mips32_pracc_clean_invalidate_cache
- *
- * Writeback D$ 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 */
- };
+ pracc_add(&ctx, 0, MIPS32_B(ctx.isa, NEG16((ctx.code_count + 1) << ctx.isa))); /* jump to start */
+ pracc_add(&ctx, 0, MIPS32_MFC0(ctx.isa, 15, 31, 0)); /* restore $15 from DeSave */
- /**
- * Find cache line size in bytes
- */
- uint32_t conf;
- uint32_t dl, clsiz;
+ ctx.retval = mips32_pracc_queue_exec(ejtag_info, &ctx, &clsiz, 1);
+ if (ctx.retval != ERROR_OK)
+ goto exit;
- mips32_cp0_read(ejtag_info, &conf, 16, 1);
- dl = (conf & MIPS32_CONFIG1_DL_MASK) >> MIPS32_CONFIG1_DL_SHIFT;
+ } else { /* Release 1 (rel = 0) */
+ uint32_t conf;
+ ctx.retval = mips32_cp0_read(ejtag_info, &conf, 16, 1);
+ if (ctx.retval != ERROR_OK)
+ goto exit;
- /* dl encoding : dl=1 => 4 bytes, dl=2 => 8 bytes, etc... */
- clsiz = 0x2 << dl;
+ uint32_t dl = (conf & MIPS32_CONFIG1_DL_MASK) >> MIPS32_CONFIG1_DL_SHIFT;
- /* 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;
+ /* dl encoding : dl=1 => 4 bytes, dl=2 => 8 bytes, etc... max dl=6 => 128 bytes cache line size */
+ clsiz = 0x2 << dl;
+ if (dl == 0)
+ clsiz = 0;
+ }
- retval = mips32_pracc_exec(ejtag_info, ARRAY_SIZE(code), code, 3, param_in, 0, NULL, 1);
+ if (clsiz == 0)
+ goto exit; /* Nothing to do */
- free(param_in);
+ /* make sure clsiz is power of 2 */
+ if (!IS_PWR_OF_2(clsiz)) {
+ LOG_DEBUG("clsiz must be power of 2");
+ ctx.retval = ERROR_FAIL;
+ goto exit;
+ }
- return retval;
-}
+ /* make sure start_addr and end_addr have the same offset inside de cache line */
+ start_addr |= clsiz - 1;
+ end_addr |= clsiz - 1;
+
+ ctx.code_count = 0;
+ ctx.store_count = 0;
+ int count = 0;
+ uint32_t last_upper_base_addr = UPPER16((start_addr + 0x8000));
-int mips32_pracc_write_mem(struct mips_ejtag *ejtag_info, uint32_t addr, int size, int count, void *buf)
+ pracc_add(&ctx, 0, MIPS32_LUI(ctx.isa, 15, last_upper_base_addr)); /* load upper memory base addr to $15 */
+
+ while (start_addr <= end_addr) { /* main loop */
+ uint32_t upper_base_addr = UPPER16((start_addr + 0x8000));
+ if (last_upper_base_addr != upper_base_addr) { /* if needed, change upper addr in $15 */
+ pracc_add(&ctx, 0, MIPS32_LUI(ctx.isa, 15, upper_base_addr));
+ last_upper_base_addr = upper_base_addr;
+ }
+ if (rel) /* synci instruction, offset($15) */
+ pracc_add(&ctx, 0, MIPS32_SYNCI(ctx.isa, LOWER16(start_addr), 15));
+
+ else {
+ if (cached == 3) /* cache Hit_Writeback_D, offset($15) */
+ pracc_add(&ctx, 0, MIPS32_CACHE(ctx.isa, MIPS32_CACHE_D_HIT_WRITEBACK,
+ LOWER16(start_addr), 15));
+ /* cache Hit_Invalidate_I, offset($15) */
+ pracc_add(&ctx, 0, MIPS32_CACHE(ctx.isa, MIPS32_CACHE_I_HIT_INVALIDATE,
+ LOWER16(start_addr), 15));
+ }
+ start_addr += clsiz;
+ count++;
+ if (count == 256 && start_addr <= end_addr) { /* more ?, then execute code list */
+ pracc_add(&ctx, 0, MIPS32_B(ctx.isa, NEG16((ctx.code_count + 1) << ctx.isa))); /* to start */
+ pracc_add(&ctx, 0, MIPS32_NOP); /* nop in delay slot */
+
+ ctx.retval = mips32_pracc_queue_exec(ejtag_info, &ctx, NULL, 1);
+ if (ctx.retval != ERROR_OK)
+ goto exit;
+
+ ctx.code_count = 0; /* reset counters for another loop */
+ ctx.store_count = 0;
+ count = 0;
+ }
+ }
+ pracc_add(&ctx, 0, MIPS32_SYNC(ctx.isa));
+ pracc_add(&ctx, 0, MIPS32_B(ctx.isa, NEG16((ctx.code_count + 1) << ctx.isa))); /* jump to start */
+ pracc_add(&ctx, 0, MIPS32_MFC0(ctx.isa, 15, 31, 0)); /* restore $15 from DeSave*/
+
+ ctx.retval = mips32_pracc_queue_exec(ejtag_info, &ctx, NULL, 1);
+exit:
+ pracc_queue_free(&ctx);
+ return ctx.retval;
+}
+
+static int mips32_pracc_write_mem_generic(struct mips_ejtag *ejtag_info,
+ uint32_t addr, int size, int count, const void *buf)
{
- int retval;
+ struct pracc_queue_info ctx = {.ejtag_info = ejtag_info};
+ pracc_queue_init(&ctx);
+
+ const uint32_t *buf32 = buf;
+ const uint16_t *buf16 = buf;
+ const uint8_t *buf8 = buf;
+
+ while (count) {
+ ctx.code_count = 0;
+ ctx.store_count = 0;
+
+ int this_round_count = (count > 128) ? 128 : count;
+ uint32_t last_upper_base_addr = UPPER16((addr + 0x8000));
+ /* load $15 with memory base address */
+ pracc_add(&ctx, 0, MIPS32_LUI(ctx.isa, 15, last_upper_base_addr));
+
+ for (int i = 0; i != this_round_count; i++) {
+ uint32_t upper_base_addr = UPPER16((addr + 0x8000));
+ if (last_upper_base_addr != upper_base_addr) { /* if needed, change upper address in $15*/
+ pracc_add(&ctx, 0, MIPS32_LUI(ctx.isa, 15, upper_base_addr));
+ last_upper_base_addr = upper_base_addr;
+ }
+
+ if (size == 4) {
+ pracc_add_li32(&ctx, 8, *buf32, 1); /* load with li32, optimize */
+ pracc_add(&ctx, 0, MIPS32_SW(ctx.isa, 8, LOWER16(addr), 15)); /* store word to mem */
+ buf32++;
+
+ } else if (size == 2) {
+ pracc_add(&ctx, 0, MIPS32_ORI(ctx.isa, 8, 0, *buf16)); /* load lower value */
+ pracc_add(&ctx, 0, MIPS32_SH(ctx.isa, 8, LOWER16(addr), 15)); /* store half word */
+ buf16++;
+
+ } else {
+ pracc_add(&ctx, 0, MIPS32_ORI(ctx.isa, 8, 0, *buf8)); /* load lower value */
+ pracc_add(&ctx, 0, MIPS32_SB(ctx.isa, 8, LOWER16(addr), 15)); /* store byte */
+ buf8++;
+ }
+ addr += size;
+ }
- switch (size) {
- case 1:
- retval = mips32_pracc_write_mem8(ejtag_info, addr, count, (uint8_t *)buf);
- break;
- case 2:
- retval = mips32_pracc_write_mem16(ejtag_info, addr, count, (uint16_t *)buf);
- break;
- case 4:
- 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;
+ pracc_add_li32(&ctx, 8, ejtag_info->reg8, 0); /* restore $8 */
+
+ pracc_add(&ctx, 0, MIPS32_B(ctx.isa, NEG16((ctx.code_count + 1) << ctx.isa))); /* jump to start */
+ pracc_add(&ctx, 0, MIPS32_MFC0(ctx.isa, 15, 31, 0)); /* restore $15 from DeSave */
+
+ ctx.retval = mips32_pracc_queue_exec(ejtag_info, &ctx, NULL, 1);
+ if (ctx.retval != ERROR_OK)
+ goto exit;
+ count -= this_round_count;
}
+exit:
+ pracc_queue_free(&ctx);
+ return ctx.retval;
+}
+
+int mips32_pracc_write_mem(struct mips_ejtag *ejtag_info, uint32_t addr, int size, int count, const void *buf)
+{
+ int retval = mips32_pracc_write_mem_generic(ejtag_info, addr, size, count, buf);
+ if (retval != ERROR_OK)
+ return retval;
/**
- * If we are in the cachable regoion and cache is activated,
- * we must clean D$ + 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)
+ * If we are in the cacheable region and cache is activated,
+ * we must clean D$ (if Cache Coherency Attribute is set to 3) + invalidate I$ after we did the write,
+ * so that changes do not continue to live only in D$ (if CCA = 3), but to be
+ * replicated in I$ also (maybe we wrote the instructions)
*/
uint32_t conf = 0;
int cached = 0;
if ((KSEGX(addr) == KSEG1) || ((addr >= 0xff200000) && (addr <= 0xff3fffff)))
return retval; /*Nothing to do*/
+ /* Reads Config0 */
mips32_cp0_read(ejtag_info, &conf, 16, 0);
switch (KSEGX(addr)) {
}
/**
- * Check cachablitiy bits coherency algorithm -
+ * Check cacheability 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;
+ if (cached == 3 || cached == 0) { /* Write back cache or write through cache */
+ uint32_t start_addr = addr;
+ uint32_t end_addr = addr + count * size;
+ uint32_t rel = (conf & MIPS32_CONFIG0_AR_MASK) >> MIPS32_CONFIG0_AR_SHIFT;
+ /* FIXME: In MIPS Release 6, the encoding of CACHE instr has changed */
+ if (rel > MIPS32_RELEASE_2) {
+ LOG_DEBUG("Unsupported MIPS Release ( > 5)");
+ return ERROR_FAIL;
}
+ retval = mips32_pracc_synchronize_cache(ejtag_info, start_addr, end_addr, cached, rel);
+ } else {
+ struct pracc_queue_info ctx = {.ejtag_info = ejtag_info};
+
+ pracc_queue_init(&ctx);
+ if (mips32_cpu_support_sync(ejtag_info))
+ pracc_add(&ctx, 0, MIPS32_SYNC(ctx.isa));
+ if (mips32_cpu_support_hazard_barrier(ejtag_info))
+ pracc_add(&ctx, 0, MIPS32_EHB(ctx.isa));
+ pracc_add(&ctx, 0, MIPS32_B(ctx.isa, NEG16((ctx.code_count + 1) << ctx.isa))); /* jump to start */
+ pracc_add(&ctx, 0, MIPS32_NOP);
+ ctx.retval = mips32_pracc_queue_exec(ejtag_info, &ctx, NULL, 1);
+ if (ctx.retval != ERROR_OK) {
+ LOG_ERROR("Unable to barrier");
+ retval = ctx.retval;
+ }
+ pracc_queue_free(&ctx);
}
return retval;
}
-static int mips32_pracc_write_mem32(struct mips_ejtag *ejtag_info, uint32_t addr, int count, uint32_t *buf)
+int mips32_pracc_write_regs(struct mips32_common *mips32)
{
- 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), /* 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)), /* bne $10, $9, loop */
- MIPS32_ADDI(8, 8, 4), /* $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)), /* b start */
- MIPS32_MFC0(15, 31, 0), /* move COP0 DeSave to $15 */
+ struct mips_ejtag *ejtag_info = &mips32->ejtag_info;
+ struct pracc_queue_info ctx = {.ejtag_info = ejtag_info};
+ uint32_t *gprs = mips32->core_regs.gpr;
+ uint32_t *c0rs = mips32->core_regs.cp0;
+ bool fpu_in_64bit = ((c0rs[0] & BIT(MIPS32_CP0_STATUS_FR_SHIFT)) != 0);
+ bool fp_enabled = ((c0rs[0] & BIT(MIPS32_CP0_STATUS_CU1_SHIFT)) != 0);
+ uint32_t rel = (ejtag_info->config[0] & MIPS32_CONFIG0_AR_MASK) >> MIPS32_CONFIG0_AR_SHIFT;
+
+ pracc_queue_init(&ctx);
+
+ uint32_t cp0_write_code[] = {
+ MIPS32_MTC0(ctx.isa, 1, 12, 0), /* move $1 to status */
+ MIPS32_MTLO(ctx.isa, 1), /* move $1 to lo */
+ MIPS32_MTHI(ctx.isa, 1), /* move $1 to hi */
+ MIPS32_MTC0(ctx.isa, 1, 8, 0), /* move $1 to badvaddr */
+ MIPS32_MTC0(ctx.isa, 1, 13, 0), /* move $1 to cause*/
+ MIPS32_MTC0(ctx.isa, 1, 24, 0), /* move $1 to depc (pc) */
+ };
+
+ uint32_t cp0_write_data[] = {
+ /* status */
+ c0rs[0],
+ /* lo */
+ gprs[32],
+ /* hi */
+ gprs[33],
+ /* badvaddr */
+ c0rs[1],
+ /* cause */
+ c0rs[2],
+ /* depc (pc) */
+ c0rs[3],
};
- /* 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 */
+ /* Write CP0 Status Register first, changes on EXL or ERL bits
+ * may lead to different behaviour on writing to other CP0 registers.
+ */
+ for (size_t i = 0; i < ARRAY_SIZE(cp0_write_code); i++) {
+ /* load CP0 value in $1 */
+ pracc_add_li32(&ctx, 1, cp0_write_data[i], 0);
+ /* write value from $1 to CP0 register */
+ pracc_add(&ctx, 0, cp0_write_code[i]);
+ }
+
+ if (mips32_cpu_support_hazard_barrier(ejtag_info))
+ pracc_add(&ctx, 0, MIPS32_EHB(ctx.isa));
+
+ /* store FPRs */
+ if (mips32->fp_imp && fp_enabled) {
+ uint64_t *fprs = mips32->core_regs.fpr;
+ if (fpu_in_64bit) {
+ for (int i = 0; i != MIPS32_REG_FP_COUNT; i++) {
+ uint32_t fp_lo = fprs[i] & 0xffffffff;
+ uint32_t fp_hi = (fprs[i] >> 32) & 0xffffffff;
+ pracc_add_li32(&ctx, 2, fp_lo, 0);
+ pracc_add_li32(&ctx, 3, fp_hi, 0);
+ pracc_add(&ctx, 0, MIPS32_MTC1(ctx.isa, 2, i));
+ pracc_add(&ctx, 0, MIPS32_MTHC1(ctx.isa, 3, i));
+ }
+ } else {
+ for (int i = 0; i != MIPS32_REG_FP_COUNT; i++) {
+ uint32_t fp_lo = fprs[i] & 0xffffffff;
+ pracc_add_li32(&ctx, 2, fp_lo, 0);
+ pracc_add(&ctx, 0, MIPS32_MTC1(ctx.isa, 2, i));
+ }
+ }
- memcpy(¶m_in[2], buf, count * sizeof(uint32_t));
+ if (rel > MIPS32_RELEASE_1)
+ pracc_add(&ctx, 0, MIPS32_EHB(ctx.isa));
+ }
- int retval;
- retval = mips32_pracc_exec(ejtag_info, ARRAY_SIZE(code), code,
- count + 2, param_in, 0, NULL, 1);
+ /* load registers 2 to 31 with li32, optimize */
+ for (int i = 2; i < 32; i++)
+ pracc_add_li32(&ctx, i, gprs[i], 1);
+
+ /* load $15 in DeSave */
+ pracc_add(&ctx, 0, MIPS32_MTC0(ctx.isa, 15, 31, 0));
+ /* load upper half word in $1 */
+ pracc_add(&ctx, 0, MIPS32_LUI(ctx.isa, 1, UPPER16((gprs[1]))));
+ /* jump to start */
+ pracc_add(&ctx, 0, MIPS32_B(ctx.isa, NEG16((ctx.code_count + 1) << ctx.isa)));
+ /* load lower half word in $1 */
+ pracc_add(&ctx, 0, MIPS32_ORI(ctx.isa, 1, 1, LOWER16((gprs[1]))));
+
+ ctx.retval = mips32_pracc_queue_exec(ejtag_info, &ctx, NULL, 1);
+
+ ejtag_info->reg8 = gprs[8];
+ ejtag_info->reg9 = gprs[9];
+ pracc_queue_free(&ctx);
+ return ctx.retval;
+}
- free(param_in);
+/* Saves content in `$1` to `DeSave(cp0.31.0)` and loads `MIPS32_PRACC_BASE_ADDR` into `$1` */
+static void mips32_pracc_store_regs_set_base_addr(struct pracc_queue_info *ctx)
+{
+ /* move $1 to COP0 DeSave */
+ pracc_add(ctx, 0, MIPS32_MTC0(ctx->isa, 1, 31, 0));
+ /* $1 = MIP32_PRACC_BASE_ADDR */
+ pracc_add(ctx, 0, MIPS32_LUI(ctx->isa, 1, PRACC_UPPER_BASE_ADDR));
+}
- return retval;
+/* This function assumes the address for saving is stored in `$1`.
+ * And that action is performed in `mips32_pracc_set_save_base_addr`.
+ */
+static void mips32_pracc_store_regs_gpr(struct pracc_queue_info *ctx, unsigned int offset_gpr)
+{
+ for (int i = 2; i != 32; i++)
+ pracc_add(ctx, MIPS32_PRACC_PARAM_OUT + offset_gpr + (i * 4),
+ MIPS32_SW(ctx->isa, i, PRACC_OUT_OFFSET + offset_gpr + (i * 4), 1));
}
-static int mips32_pracc_write_u32(struct mips_ejtag *ejtag_info, uint32_t addr, uint32_t *buf)
+static void mips32_pracc_store_regs_lohi(struct pracc_queue_info *ctx)
{
- 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 */
+ uint32_t lohi_read_code[] = {
+ MIPS32_MFLO(ctx->isa, 8), /* move lo to $8 */
+ MIPS32_MFHI(ctx->isa, 8), /* move hi to $8 */
};
- /* 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);
+ /* store lo & hi */
+ for (int i = 0; i < 2; i++) {
+ /* load COP0 needed registers to $8 */
+ pracc_add(ctx, 0, lohi_read_code[i]);
+ /* store $8 at PARAM OUT */
+ pracc_add(ctx, MIPS32_PRACC_PARAM_OUT + (i + 32) * 4,
+ MIPS32_SW(ctx->isa, 8, PRACC_OUT_OFFSET + (i + 32) * 4, 1));
+ }
}
-static int mips32_pracc_write_mem16(struct mips_ejtag *ejtag_info, uint32_t addr, int count, uint16_t *buf)
+/* Saves CP0 registers [status, badvaddr, cause, depc] */
+static void mips32_pracc_store_regs_cp0_context(struct pracc_queue_info *ctx, unsigned int offset_cp0)
{
- 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 */
- /* loop: */
- 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_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), /* 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 */
+ uint32_t cp0_read_code[] = {
+ MIPS32_MFC0(ctx->isa, 8, 12, 0), /* move status to $8 */
+ MIPS32_MFC0(ctx->isa, 8, 8, 0), /* move badvaddr to $8 */
+ MIPS32_MFC0(ctx->isa, 8, 13, 0), /* move cause to $8 */
+ MIPS32_MFC0(ctx->isa, 8, 24, 0), /* move depc (pc) to $8 */
};
- /* TODO remove array */
- uint32_t *param_in = malloc((count + 2) * sizeof(uint32_t));
- int i;
- param_in[0] = addr;
- param_in[1] = count;
+ /* store cp0 */
+ for (size_t i = 0; i < ARRAY_SIZE(cp0_read_code); i++) {
+ size_t offset = offset_cp0 + (i * 4);
- for (i = 0; i < count; i++)
- param_in[i + 2] = buf[i];
-
- int retval;
- retval = mips32_pracc_exec(ejtag_info, ARRAY_SIZE(code), code,
- count + 2, param_in, 0, NULL, 1);
+ /* load COP0 needed registers to $8 */
+ pracc_add(ctx, 0, cp0_read_code[i]);
+ /* store $8 at PARAM OUT */
+ pracc_add(ctx, MIPS32_PRACC_PARAM_OUT + offset,
+ MIPS32_SW(ctx->isa, 8, PRACC_OUT_OFFSET + offset, 1));
+ }
+}
- free(param_in);
+/* Loads original content of $1 into $8,
+ * then store it to the batch data access address.
+ * Finally it restores $1 from DeSave.
+ */
+static void mips32_pracc_store_regs_restore(struct pracc_queue_info *ctx)
+{
+ /* move DeSave to $8, reg1 value */
+ pracc_add(ctx, 0, MIPS32_MFC0(ctx->isa, 8, 31, 0));
+ /* store reg1 value from $8 to param out */
+ pracc_add(ctx, MIPS32_PRACC_PARAM_OUT + 4,
+ MIPS32_SW(ctx->isa, 8, PRACC_OUT_OFFSET + 4, 1));
+
+ /* move COP0 DeSave to $1, restore reg1 */
+ pracc_add(ctx, 0, MIPS32_MFC0(ctx->isa, 1, 31, 0));
+}
- return retval;
+/* This function performs following actions:
+ * Saves `$1` to `DeSave`,
+ * then load `PRACC_UPPER_BASE_ADDR` for saving the register data structure into `$1`,
+ * Saves `$2` ~ `$31` to `PRACC_UPPER_BASE_ADDR + offset_gpr`
+ * Saves HI and LO,
+ * Saves necessary cp0 registers.
+*/
+static void mips32_pracc_store_regs(struct pracc_queue_info *ctx,
+ unsigned int offset_gpr, unsigned int offset_cp0)
+{
+ mips32_pracc_store_regs_set_base_addr(ctx);
+ mips32_pracc_store_regs_gpr(ctx, offset_gpr);
+ mips32_pracc_store_regs_lohi(ctx);
+ mips32_pracc_store_regs_cp0_context(ctx, offset_cp0);
+ mips32_pracc_store_regs_restore(ctx);
}
-static int mips32_pracc_write_mem8(struct mips_ejtag *ejtag_info, uint32_t addr, int count, uint8_t *buf)
+int mips32_pracc_read_regs(struct mips32_common *mips32)
{
- 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 */
- /* loop: */
- 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_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(26)), /* b start */
- MIPS32_MFC0(15, 31, 0), /* move COP0 DeSave to $15 */
- };
+ struct mips_ejtag *ejtag_info = &mips32->ejtag_info;
+ struct pracc_queue_info ctx = {.ejtag_info = ejtag_info};
+ struct mips32_core_regs *core_regs = &mips32->core_regs;
+ unsigned int offset_gpr = ((uint8_t *)&core_regs->gpr[0]) - (uint8_t *)core_regs;
+ unsigned int offset_cp0 = ((uint8_t *)&core_regs->cp0[0]) - (uint8_t *)core_regs;
+ unsigned int offset_fpr = ((uint8_t *)&core_regs->fpr[0]) - (uint8_t *)core_regs;
+ unsigned int offset_fpcr = ((uint8_t *)&core_regs->fpcr[0]) - (uint8_t *)core_regs;
+ bool fp_enabled;
+
+ /*
+ * This procedure has to be in 2 distinctive steps, because we can
+ * only know whether FP is enabled after reading CP0.
+ *
+ * Step 1: Read everything except CP1 stuff
+ * Step 2: Read CP1 stuff if FP is implemented
+ */
- /* 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;
+ pracc_queue_init(&ctx);
- for (i = 0; i < count; i++)
- param_in[i + 2] = buf[i];
+ mips32_pracc_store_regs(&ctx, offset_gpr, offset_cp0);
- retval = mips32_pracc_exec(ejtag_info, ARRAY_SIZE(code), code,
- count + 2, param_in, 0, NULL, 1);
+ /* jump to start */
+ pracc_add(&ctx, 0, MIPS32_B(ctx.isa, NEG16((ctx.code_count + 1) << ctx.isa)));
+ /* load $15 in DeSave */
+ pracc_add(&ctx, 0, MIPS32_MTC0(ctx.isa, 15, 31, 0));
- free(param_in);
+ ctx.retval = mips32_pracc_queue_exec(ejtag_info, &ctx, (uint32_t *)&mips32->core_regs, 1);
- return retval;
-}
+ pracc_queue_free(&ctx);
-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 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 */
- };
+ /* reg8 is saved but not restored, next called function should restore it */
+ ejtag_info->reg8 = mips32->core_regs.gpr[8];
+ ejtag_info->reg9 = mips32->core_regs.gpr[9];
- int retval;
+ if (ctx.retval != ERROR_OK)
+ return ctx.retval;
- retval = mips32_pracc_exec(ejtag_info, ARRAY_SIZE(code), code,
- MIPS32NUMCOREREGS, regs, 0, NULL, 1);
+ /* we only care if FP is actually impl'd and if cp1 is enabled */
+ /* since we already read cp0 in the prev step */
+ /* now we know what's in cp0.status */
+ fp_enabled = (mips32->core_regs.cp0[0] & BIT(MIPS32_CP0_STATUS_CU1_SHIFT)) != 0;
+ if (mips32->fp_imp && fp_enabled) {
+ pracc_queue_init(&ctx);
- return retval;
+ mips32_pracc_store_regs_set_base_addr(&ctx);
+
+ /* FCSR */
+ pracc_add(&ctx, 0, MIPS32_CFC1(ctx.isa, 8, 31));
+ pracc_add(&ctx, MIPS32_PRACC_PARAM_OUT + offset_fpcr,
+ MIPS32_SW(ctx.isa, 8, PRACC_OUT_OFFSET + offset_fpcr, 1));
+
+ /* FIR */
+ pracc_add(&ctx, 0, MIPS32_CFC1(ctx.isa, 8, 0));
+ pracc_add(&ctx, MIPS32_PRACC_PARAM_OUT + offset_fpcr + 4,
+ MIPS32_SW(ctx.isa, 8, PRACC_OUT_OFFSET + offset_fpcr + 4, 1));
+
+ /* f0 to f31 */
+ if (mips32->fpu_in_64bit) {
+ for (int i = 0; i != 32; i++) {
+ size_t offset = offset_fpr + (i * 8);
+ /* current pracc implementation (or EJTAG itself) only supports 32b access */
+ /* so there is no way to use SDC1 */
+
+ /* lower half */
+ pracc_add(&ctx, 0, MIPS32_MFC1(ctx.isa, 8, i));
+ pracc_add(&ctx, MIPS32_PRACC_PARAM_OUT + offset,
+ MIPS32_SW(ctx.isa, 8, PRACC_OUT_OFFSET + offset, 1));
+
+ /* upper half */
+ pracc_add(&ctx, 0, MIPS32_MFHC1(ctx.isa, 8, i));
+ pracc_add(&ctx, MIPS32_PRACC_PARAM_OUT + offset + 4,
+ MIPS32_SW(ctx.isa, 8, PRACC_OUT_OFFSET + offset + 4, 1));
+ }
+ } else {
+ for (int i = 0; i != 32; i++) {
+ size_t offset = offset_fpr + (i * 8);
+ pracc_add(&ctx, MIPS32_PRACC_PARAM_OUT + offset,
+ MIPS32_SWC1(ctx.isa, i, PRACC_OUT_OFFSET + offset, 1));
+ }
+ }
+
+ mips32_pracc_store_regs_restore(&ctx);
+
+ /* jump to start */
+ pracc_add(&ctx, 0, MIPS32_B(ctx.isa, NEG16((ctx.code_count + 1) << ctx.isa)));
+ /* load $15 in DeSave */
+ pracc_add(&ctx, 0, MIPS32_MTC0(ctx.isa, 15, 31, 0));
+
+ ctx.retval = mips32_pracc_queue_exec(ejtag_info, &ctx, (uint32_t *)&mips32->core_regs, 1);
+
+ pracc_queue_free(&ctx);
+ }
+ return ctx.retval;
}
-int mips32_pracc_read_regs(struct mips_ejtag *ejtag_info, uint32_t *regs)
+/**
+ * mips32_pracc_fastdata_xfer_synchronize_cache - Synchronize cache for fast data transfer
+ * @param[in] ejtag_info: EJTAG information structure
+ * @param[in] addr: Starting address for cache synchronization
+ * @param[in] size: Size of each data element
+ * @param[in] count: Number of data elements
+ *
+ * @brief Synchronizes the cache for fast data transfer based on
+ * the specified address and cache configuration.
+ * If the region is cacheable (write-back cache or write-through cache),
+ * it synchronizes the cache for the specified range.
+ * The synchronization is performed using the MIPS32 cache synchronization function.
+ *
+ * @return ERROR_OK on success; error code on failure.
+ */
+static int mips32_pracc_fastdata_xfer_synchronize_cache(struct mips_ejtag *ejtag_info,
+ uint32_t addr, int size, int count)
{
- 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 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 */
- };
+ int retval = ERROR_OK;
- int retval;
+ if ((KSEGX(addr) == KSEG1) || (addr >= 0xff200000 && addr <= 0xff3fffff)) // DESEG?
+ return retval; /*Nothing to do*/
+
+ int cached = 0;
+ uint32_t conf = 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 KSEG2:
+ case KSEG3:
+ cached = (conf & MIPS32_CONFIG0_K23_MASK) >> MIPS32_CONFIG0_K23_SHIFT;
+ break;
+ default:
+ /* what ? */
+ break;
+ }
- retval = mips32_pracc_exec(ejtag_info, ARRAY_SIZE(code), code,
- 0, NULL, MIPS32NUMCOREREGS, regs, 1);
+ /**
+ * Check cacheability bits coherency algorithm
+ * is the region cacheable or uncached.
+ * If cacheable we have to synchronize the cache
+ */
+ if (cached == 3 || cached == 0) { /* Write back cache or write through cache */
+ uint32_t start_addr = addr;
+ uint32_t end_addr = addr + count * size;
+ uint32_t rel = (conf & MIPS32_CONFIG0_AR_MASK) >> MIPS32_CONFIG0_AR_SHIFT;
+ /* FIXME: In MIPS Release 6, the encoding of CACHE instr has changed */
+ if (rel > MIPS32_RELEASE_2) {
+ LOG_DEBUG("Unsupported MIPS Release ( > 5)");
+ return ERROR_FAIL;
+ }
+ retval = mips32_pracc_synchronize_cache(ejtag_info, start_addr, end_addr, cached, rel);
+ }
return retval;
}
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 isa = ejtag_info->isa ? 1 : 0;
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),
+ MIPS32_SW(isa, 8, MIPS32_FASTDATA_HANDLER_SIZE - 4, 15),
+ MIPS32_SW(isa, 9, MIPS32_FASTDATA_HANDLER_SIZE - 8, 15),
+ MIPS32_SW(isa, 10, MIPS32_FASTDATA_HANDLER_SIZE - 12, 15),
+ MIPS32_SW(isa, 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_LUI(isa, 8, UPPER16(MIPS32_PRACC_FASTDATA_AREA)),
+ MIPS32_ORI(isa, 8, 8, LOWER16(MIPS32_PRACC_FASTDATA_AREA)),
+ MIPS32_LW(isa, 9, 0, 8), /* start addr in t1 */
+ mips32_cpu_support_sync(ejtag_info) ? MIPS32_SYNC(isa) : MIPS32_NOP, /* barrier for ordering */
+ MIPS32_LW(isa, 10, 0, 8), /* end addr to t2 */
+ mips32_cpu_support_sync(ejtag_info) ? MIPS32_SYNC(isa) : MIPS32_NOP, /* barrier for ordering */
+ /* loop: */
+ write_t ? MIPS32_LW(isa, 11, 0, 8) : MIPS32_LW(isa, 11, 0, 9), /* from xfer area : from memory */
+ write_t ? MIPS32_SW(isa, 11, 0, 9) : MIPS32_SW(isa, 11, 0, 8), /* to memory : to xfer area */
+
+ mips32_cpu_support_sync(ejtag_info) ? MIPS32_SYNC(isa) : MIPS32_NOP, /* barrier for ordering */
+
+ MIPS32_BNE(isa, 10, 9, NEG16(4 << isa)), /* bne $t2,t1,loop */
+ MIPS32_ADDI(isa, 9, 9, 4), /* addi t1,t1,4 */
+
+ MIPS32_LW(isa, 8, MIPS32_FASTDATA_HANDLER_SIZE - 4, 15),
+ MIPS32_LW(isa, 9, MIPS32_FASTDATA_HANDLER_SIZE - 8, 15),
+ MIPS32_LW(isa, 10, MIPS32_FASTDATA_HANDLER_SIZE - 12, 15),
+ MIPS32_LW(isa, 11, MIPS32_FASTDATA_HANDLER_SIZE - 16, 15),
+
+ MIPS32_LUI(isa, 15, UPPER16(MIPS32_PRACC_TEXT)),
+ MIPS32_ORI(isa, 15, 15, LOWER16(MIPS32_PRACC_TEXT) | isa), /* isa bit for JR instr */
+ mips32_cpu_support_hazard_barrier(ejtag_info)
+ ? MIPS32_JRHB(isa, 15)
+ : MIPS32_JR(isa, 15), /* jr start */
+ MIPS32_MFC0(isa, 15, 31, 0), /* move COP0 DeSave to $15 */
};
- 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 */
+ pracc_swap16_array(ejtag_info, handler_code, ARRAY_SIZE(handler_code));
+ /* 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);
+ mips32_pracc_write_mem(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);
+ LOG_DEBUG("%s using 0x%.8" TARGET_PRIxADDR " for write handler", __func__, source->address);
- jmp_code[1] |= UPPER16(source->address);
- jmp_code[2] |= LOWER16(source->address);
+ uint32_t jmp_code[] = {
+ MIPS32_LUI(isa, 15, UPPER16(source->address)), /* load addr of jump in $15 */
+ MIPS32_ORI(isa, 15, 15, LOWER16(source->address) | isa), /* isa bit for JR instr */
+ mips32_cpu_support_hazard_barrier(ejtag_info)
+ ? MIPS32_JRHB(isa, 15)
+ : MIPS32_JR(isa, 15), /* jump to ram program */
+ isa ? MIPS32_XORI(isa, 15, 15, 1) : MIPS32_NOP, /* drop isa bit, needed for LW/SW instructions */
+ };
- for (i = 0; i < (int) ARRAY_SIZE(jmp_code); i++) {
- retval = wait_for_pracc_rw(ejtag_info, &ejtag_ctrl);
+ pracc_swap16_array(ejtag_info, jmp_code, ARRAY_SIZE(jmp_code));
+
+ /* execute jump code, with no address check */
+ for (unsigned i = 0; i < ARRAY_SIZE(jmp_code); i++) {
+ int retval = wait_for_pracc_rw(ejtag_info);
if (retval != ERROR_OK)
return retval;
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);
+ mips32_pracc_finish(ejtag_info);
}
- retval = wait_for_pracc_rw(ejtag_info, &ejtag_ctrl);
+ /* wait PrAcc pending bit for FASTDATA write, read address */
+ int retval = mips32_pracc_read_ctrl_addr(ejtag_info);
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;
-
- if (address != MIPS32_PRACC_FASTDATA_AREA)
+ if (ejtag_info->pa_addr != MIPS32_PRACC_FASTDATA_AREA)
return ERROR_FAIL;
- /* wait PrAcc pending bit for FASTDATA write */
- retval = wait_for_pracc_rw(ejtag_info, &ejtag_ctrl);
- if (retval != ERROR_OK)
- return retval;
-
/* Send the load start address */
- val = addr;
+ uint32_t val = addr;
mips_ejtag_set_instr(ejtag_info, EJTAG_INST_FASTDATA);
mips_ejtag_fastdata_scan(ejtag_info, 1, &val);
+ retval = wait_for_pracc_rw(ejtag_info);
+ if (retval != ERROR_OK)
+ return 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);
- for (i = 0; i < count; i++) {
- retval = mips_ejtag_fastdata_scan(ejtag_info, write_t, buf++);
- if (retval != ERROR_OK)
- return retval;
+ unsigned num_clocks = 0; /* like in legacy code */
+ if (ejtag_info->mode != 0)
+ num_clocks = ((uint64_t)(ejtag_info->scan_delay) * adapter_get_speed_khz() + 500000) / 1000000;
+
+ for (int i = 0; i < count; i++) {
+ jtag_add_clocks(num_clocks);
+ mips_ejtag_fastdata_scan(ejtag_info, write_t, buf++);
}
retval = jtag_execute_queue();
return retval;
}
- retval = wait_for_pracc_rw(ejtag_info, &ejtag_ctrl);
+ retval = mips32_pracc_read_ctrl_addr(ejtag_info);
if (retval != 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)
+ if (ejtag_info->pa_addr != MIPS32_PRACC_TEXT)
LOG_ERROR("mini program did not return to start");
- return retval;
+ return mips32_pracc_fastdata_xfer_synchronize_cache(ejtag_info, addr, 4, count);
}
Code Review / openocd.git / blobdiff