* *
* Copyright (C) 2008 by David T.L. Wong *
* *
+ * Copyright (C) 2009 by David N. Claffey <dnclaffey@gmail.com> *
+ * *
+ * 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 *
***************************************************************************/
/*
-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 <helper/time_support.h>
+
#include "mips32.h"
#include "mips32_pracc.h"
-typedef struct {
+struct mips32_pracc_context {
uint32_t *local_iparam;
int num_iparam;
uint32_t *local_oparam;
int num_oparam;
- uint32_t *code;
+ const uint32_t *code;
int code_len;
uint32_t stack[32];
int stack_offset;
- mips_ejtag_t *ejtag_info;
-} mips32_pracc_context;
+ struct mips_ejtag *ejtag_info;
+};
-static int wait_for_pracc_rw(mips_ejtag_t *ejtag_info, uint32_t *ctrl)
+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;
-
- while (1)
- {
- mips_ejtag_set_instr(ejtag_info, EJTAG_INST_CONTROL, NULL);
+ 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) {
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;
return ERROR_OK;
}
-static int mips32_pracc_exec_read(mips32_pracc_context *ctx, uint32_t address)
+static int mips32_pracc_exec_read(struct mips32_pracc_context *ctx, uint32_t address)
{
- mips_ejtag_t *ejtag_info = ctx->ejtag_info;
+ struct mips_ejtag *ejtag_info = ctx->ejtag_info;
int offset;
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);
+ 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();
-
-
- return ERROR_OK;
+ return jtag_execute_queue();
}
-static int mips32_pracc_exec_write(mips32_pracc_context *ctx, uint32_t address)
+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;
- mips_ejtag_t *ejtag_info = ctx->ejtag_info;
+ struct mips_ejtag *ejtag_info = ctx->ejtag_info;
+ int retval;
+
+ mips_ejtag_set_instr(ctx->ejtag_info, EJTAG_INST_DATA);
+ retval = mips_ejtag_drscan_32(ctx->ejtag_info, &data);
+ if (retval != ERROR_OK)
+ return retval;
- mips_ejtag_set_instr(ctx->ejtag_info, EJTAG_INST_DATA, NULL);
- mips_ejtag_drscan_32(ctx->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, 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();
-
- 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))
- {
+ retval = jtag_execute_queue();
+ if (retval != ERROR_OK)
+ return retval;
+
+ 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(mips_ejtag_t *ejtag_info, int code_len, 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;
- mips32_pracc_context ctx;
+ uint32_t address;
+ struct mips32_pracc_context ctx;
int retval;
int pass = 0;
-
+
ctx.local_iparam = param_in;
ctx.local_oparam = param_out;
ctx.num_iparam = num_param_in;
ctx.code_len = code_len;
ctx.ejtag_info = ejtag_info;
ctx.stack_offset = 0;
-
- while (1)
- {
- if ((retval = wait_for_pracc_rw(ejtag_info, &ejtag_ctrl)) != ERROR_OK)
+
+ while (1) {
+ retval = wait_for_pracc_rw(ejtag_info, &ejtag_ctrl);
+ 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;
-
- 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);
-
/* 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)
- return retval;
+ retval = mips32_pracc_exec_read(&ctx, address);
+ if (retval != ERROR_OK)
+ return retval;
}
-
+
if (cycle == 0)
break;
}
-
+
/* stack sanity check */
if (ctx.stack_offset != 0)
- {
LOG_DEBUG("Pracc Stack not zero");
- }
-
+
return ERROR_OK;
}
-int mips32_pracc_read_mem(mips_ejtag_t *ejtag_info, uint32_t addr, int size, int count, void *buf)
+inline void pracc_queue_init(struct pracc_queue_info *ctx)
{
- 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);
+ ctx->retval = ERROR_OK;
+ ctx->code_count = 0;
+ ctx->store_count = 0;
+
+ ctx->pracc_list = malloc(2 * ctx->max_code * sizeof(uint32_t));
+ if (ctx->pracc_list == NULL) {
+ LOG_ERROR("Out of memory");
+ ctx->retval = ERROR_FAIL;
}
-
- return ERROR_OK;
}
-int mips32_pracc_read_mem32(mips_ejtag_t *ejtag_info, uint32_t addr, int count, uint32_t *buf)
-{
- 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_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_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,
- };
-
- int retval = ERROR_OK;
- int blocksize;
- int bytesread;
- uint32_t param_in[2];
-
- bytesread = 0;
-
- while (count > 0)
- {
- blocksize = count;
- if (count > 0x400)
- blocksize = 0x400;
-
- param_in[0] = addr;
- param_in[1] = blocksize;
-
- if ((retval = mips32_pracc_exec(ejtag_info, sizeof(code)/sizeof(code[0]), code,
- sizeof(param_in)/sizeof(param_in[0]), param_in, blocksize, &buf[bytesread], 1)) != ERROR_OK)
- {
- return retval;
- }
-
- count -= blocksize;
- addr += blocksize;
- bytesread += blocksize;
- }
+inline void pracc_add(struct pracc_queue_info *ctx, uint32_t addr, uint32_t instr)
+{
+ ctx->pracc_list[ctx->max_code + ctx->code_count] = addr;
+ ctx->pracc_list[ctx->code_count++] = instr;
+ if (addr)
+ ctx->store_count++;
+}
- return retval;
+inline void pracc_queue_free(struct pracc_queue_info *ctx)
+{
+ if (ctx->code_count > ctx->max_code) /* Only for internal check, will be erased */
+ LOG_ERROR("Internal error, code count: %d > max code: %d", ctx->code_count, ctx->max_code);
+ if (ctx->pracc_list != NULL)
+ free(ctx->pracc_list);
}
-int mips32_pracc_read_u32(mips_ejtag_t *ejtag_info, uint32_t addr, uint32_t *buf)
+int mips32_pracc_queue_exec(struct mips_ejtag *ejtag_info, struct pracc_queue_info *ctx, uint32_t *buf)
{
- 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) */
+ if (ejtag_info->mode == 0)
+ return mips32_pracc_exec(ejtag_info, ctx->code_count, ctx->pracc_list, 0, NULL,
+ ctx->store_count, buf, ctx->code_count - 1);
+
+ union scan_in {
+ uint8_t scan_96[12];
+ struct {
+ uint8_t ctrl[4];
+ uint8_t data[4];
+ uint8_t addr[4];
+ } scan_32;
+
+ } *scan_in = malloc(sizeof(union scan_in) * (ctx->code_count + ctx->store_count));
+ if (scan_in == NULL) {
+ LOG_ERROR("Out of memory");
+ return ERROR_FAIL;
+ }
- MIPS32_LW(8,NEG16(MIPS32_PRACC_STACK-MIPS32_PRACC_PARAM_IN), 15), //load R8 @ param_in[0] = address
+ unsigned num_clocks =
+ ((uint64_t)(ejtag_info->scan_delay) * jtag_get_speed_khz() + 500000) / 1000000;
- 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) */
+ uint32_t ejtag_ctrl = ejtag_info->ejtag_ctrl & ~EJTAG_CTRL_PRACC;
+ mips_ejtag_set_instr(ejtag_info, EJTAG_INST_ALL);
- 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,
- };
+ int scan_count = 0;
+ for (int i = 0; i != 2 * ctx->code_count; i++) {
+ uint32_t data = 0;
+ if (i & 1u) { /* Check store address from previous instruction, if not the first */
+ if (i < 2 || 0 == ctx->pracc_list[ctx->max_code + (i / 2) - 1])
+ continue;
+ } else
+ data = ctx->pracc_list[i / 2];
- int retval = ERROR_OK;
- uint32_t param_in[1];
+ jtag_add_clocks(num_clocks);
+ mips_ejtag_add_scan_96(ejtag_info, ejtag_ctrl, data, scan_in[scan_count++].scan_96);
+ }
- param_in[0] = addr;
+ 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 != 2 * ctx->code_count; i++) { /* verify every pracc access */
+ uint32_t store_addr = 0;
+ if (i & 1u) { /* Read store addres from previous instruction, if not the first */
+ store_addr = ctx->pracc_list[ctx->max_code + (i / 2) - 1];
+ if (i < 2 || 0 == store_addr)
+ continue;
+ }
- 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;
- }
+ ejtag_ctrl = buf_get_u32(scan_in[scan_count].scan_32.ctrl, 0, 32);
+ if (!(ejtag_ctrl & EJTAG_CTRL_PRACC)) {
+ LOG_ERROR("Error: access not pending count: %d", scan_count);
+ retval = ERROR_FAIL;
+ goto exit;
+ }
+ uint32_t addr = buf_get_u32(scan_in[scan_count].scan_32.addr, 0, 32);
+
+ if (store_addr != 0) {
+ 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: %x expected: %x 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);
+
+ } else {
+ 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: %x expected: %x count: %d", addr, fetch_addr, scan_count);
+ retval = ERROR_FAIL;
+ goto exit;
+ }
+ fetch_addr += 4;
+ }
+ scan_count++;
+ }
+exit:
+ free(scan_in);
return retval;
}
-int mips32_pracc_read_mem16(mips_ejtag_t *ejtag_info, uint32_t addr, int count, uint16_t *buf)
+int mips32_pracc_read_u32(struct mips_ejtag *ejtag_info, uint32_t addr, uint32_t *buf)
{
- 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_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_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,
- };
-
-// /* TODO remove array */
- uint32_t param_out[count];
- int i;
-
-// int retval;
- int blocksize;
- int bytesread;
- uint32_t param_in[2];
-
- bytesread = 0;
-
- //while (count > 0)
- {
- blocksize = count;
- if (count > 0x400)
- blocksize = 0x400;
-
- param_in[0] = addr;
- param_in[1] = blocksize;
-
- mips32_pracc_exec(ejtag_info, sizeof(code)/sizeof(code[0]), code, \
- sizeof(param_in)/sizeof(param_in[0]), param_in, count, param_out, 1);
-
-// count -= blocksize;
-// addr += blocksize;
-// bytesread += blocksize;
- }
-
- for (i = 0; i < count; i++)
- {
- buf[i] = param_out[i];
- }
-
- return ERROR_OK;
+ struct pracc_queue_info ctx = {.max_code = 9};
+ pracc_queue_init(&ctx);
+ if (ctx.retval != ERROR_OK)
+ goto exit;
+
+ pracc_add(&ctx, 0, MIPS32_MTC0(15, 31, 0)); /* move $15 to COP0 DeSave */
+ pracc_add(&ctx, 0, MIPS32_LUI(15, PRACC_UPPER_BASE_ADDR)); /* $15 = MIPS32_PRACC_BASE_ADDR */
+ pracc_add(&ctx, 0, MIPS32_LUI(8, UPPER16((addr + 0x8000)))); /* load $8 with modified upper address */
+ pracc_add(&ctx, 0, MIPS32_LW(8, LOWER16(addr), 8)); /* lw $8, LOWER16(addr)($8) */
+ pracc_add(&ctx, MIPS32_PRACC_PARAM_OUT,
+ MIPS32_SW(8, PRACC_OUT_OFFSET, 15)); /* sw $8,PRACC_OUT_OFFSET($15) */
+ pracc_add(&ctx, 0, MIPS32_LUI(8, UPPER16(ejtag_info->reg8))); /* restore upper 16 of $8 */
+ pracc_add(&ctx, 0, MIPS32_ORI(8, 8, LOWER16(ejtag_info->reg8))); /* restore lower 16 of $8 */
+ pracc_add(&ctx, 0, MIPS32_B(NEG16(ctx.code_count + 1))); /* jump to start */
+ pracc_add(&ctx, 0, MIPS32_MFC0(15, 31, 0)); /* move COP0 DeSave to $15 */
+
+ ctx.retval = mips32_pracc_queue_exec(ejtag_info, &ctx, buf);
+exit:
+ pracc_queue_free(&ctx);
+ return ctx.retval;
}
-int mips32_pracc_read_mem8(mips_ejtag_t *ejtag_info, uint32_t addr, int count, uint8_t *buf)
+int mips32_pracc_read_mem(struct mips_ejtag *ejtag_info, uint32_t addr, int size, int count, void *buf)
{
- 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) */
-
- 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,
- };
-
-// /* TODO remove array */
- uint32_t param_out[count];
- int i;
-
-// int retval;
- int blocksize;
- int bytesread;
- uint32_t param_in[2];
-
- bytesread = 0;
-
-// while (count > 0)
- {
- blocksize = count;
- if (count > 0x400)
- blocksize = 0x400;
-
- param_in[0] = addr;
- param_in[1] = blocksize;
-
- mips32_pracc_exec(ejtag_info, sizeof(code)/sizeof(code[0]), code, \
- sizeof(param_in)/sizeof(param_in[0]), param_in, count, param_out, 1);
-
-// count -= blocksize;
-// addr += blocksize;
-// bytesread += blocksize;
- }
-
- for (i = 0; i < count; i++)
- {
- buf[i] = param_out[i];
+ if (count == 1 && size == 4)
+ return mips32_pracc_read_u32(ejtag_info, addr, (uint32_t *)buf);
+
+ uint32_t *data = NULL;
+ struct pracc_queue_info ctx = {.max_code = 256 * 3 + 9 + 1}; /* alloc memory for the worst case */
+ pracc_queue_init(&ctx);
+ if (ctx.retval != ERROR_OK)
+ goto exit;
+
+ if (size != 4) {
+ data = malloc(256 * sizeof(uint32_t));
+ if (data == NULL) {
+ LOG_ERROR("Out of memory");
+ goto exit;
+ }
}
- return ERROR_OK;
-}
+ uint32_t *buf32 = buf;
+ uint16_t *buf16 = buf;
+ uint8_t *buf8 = buf;
+
+ while (count) {
+ ctx.code_count = 0;
+ ctx.store_count = 0;
+ int this_round_count = (count > 256) ? 256 : count;
+ uint32_t last_upper_base_addr = UPPER16((addr + 0x8000));
+
+ pracc_add(&ctx, 0, MIPS32_MTC0(15, 31, 0)); /* save $15 in DeSave */
+ pracc_add(&ctx, 0, MIPS32_LUI(15, PRACC_UPPER_BASE_ADDR)); /* $15 = MIPS32_PRACC_BASE_ADDR */
+ pracc_add(&ctx, 0, MIPS32_LUI(9, last_upper_base_addr)); /* load the upper memory address in $9 */
+
+ 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 address in $9 */
+ pracc_add(&ctx, 0, MIPS32_LUI(9, upper_base_addr));
+ last_upper_base_addr = upper_base_addr;
+ }
-int mips32_pracc_write_mem(mips_ejtag_t *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);
+ if (size == 4)
+ pracc_add(&ctx, 0, MIPS32_LW(8, LOWER16(addr), 9)); /* load from memory to $8 */
+ else if (size == 2)
+ pracc_add(&ctx, 0, MIPS32_LHU(8, LOWER16(addr), 9));
else
- return mips32_pracc_write_mem32(ejtag_info, addr, count, (uint32_t*)buf);
+ pracc_add(&ctx, 0, MIPS32_LBU(8, LOWER16(addr), 9));
+
+ pracc_add(&ctx, MIPS32_PRACC_PARAM_OUT + i * 4,
+ MIPS32_SW(8, PRACC_OUT_OFFSET + i * 4, 15)); /* store $8 at param out */
+ addr += size;
+ }
+ pracc_add(&ctx, 0, MIPS32_LUI(8, UPPER16(ejtag_info->reg8))); /* restore upper 16 bits of reg 8 */
+ pracc_add(&ctx, 0, MIPS32_ORI(8, 8, LOWER16(ejtag_info->reg8))); /* restore lower 16 bits of reg 8 */
+ pracc_add(&ctx, 0, MIPS32_LUI(9, UPPER16(ejtag_info->reg9))); /* restore upper 16 bits of reg 9 */
+ pracc_add(&ctx, 0, MIPS32_ORI(9, 9, LOWER16(ejtag_info->reg9))); /* restore lower 16 bits of reg 9 */
+
+ pracc_add(&ctx, 0, MIPS32_B(NEG16(ctx.code_count + 1))); /* jump to start */
+ pracc_add(&ctx, 0, MIPS32_MFC0(15, 31, 0)); /* restore $15 from DeSave */
+
+ if (size == 4) {
+ ctx.retval = mips32_pracc_queue_exec(ejtag_info, &ctx, buf32);
+ if (ctx.retval != ERROR_OK)
+ goto exit;
+ buf32 += this_round_count;
+ } else {
+ ctx.retval = mips32_pracc_queue_exec(ejtag_info, &ctx, data);
+ 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;
}
-
- return ERROR_OK;
+exit:
+ pracc_queue_free(&ctx);
+ if (data != NULL)
+ free(data);
+ return ctx.retval;
}
-int mips32_pracc_write_mem32(mips_ejtag_t *ejtag_info, uint32_t addr, int count, uint32_t *buf)
+int mips32_cp0_read(struct mips_ejtag *ejtag_info, uint32_t *val, uint32_t cp0_reg, uint32_t cp0_sel)
{
+ struct pracc_queue_info ctx = {.max_code = 8};
+ pracc_queue_init(&ctx);
+ if (ctx.retval != ERROR_OK)
+ goto exit;
+
+ pracc_add(&ctx, 0, MIPS32_MTC0(15, 31, 0)); /* move $15 to COP0 DeSave */
+ pracc_add(&ctx, 0, MIPS32_LUI(15, PRACC_UPPER_BASE_ADDR)); /* $15 = MIPS32_PRACC_BASE_ADDR */
+ pracc_add(&ctx, 0, MIPS32_MFC0(8, 0, 0) | (cp0_reg << 11) | cp0_sel); /* move COP0 [cp0_reg select] to $8 */
+ pracc_add(&ctx, MIPS32_PRACC_PARAM_OUT,
+ MIPS32_SW(8, PRACC_OUT_OFFSET, 15)); /* store $8 to pracc_out */
+ pracc_add(&ctx, 0, MIPS32_MFC0(15, 31, 0)); /* move COP0 DeSave to $15 */
+ pracc_add(&ctx, 0, MIPS32_LUI(8, UPPER16(ejtag_info->reg8))); /* restore upper 16 bits of $8 */
+ pracc_add(&ctx, 0, MIPS32_B(NEG16(ctx.code_count + 1))); /* jump to start */
+ pracc_add(&ctx, 0, MIPS32_ORI(8, 8, LOWER16(ejtag_info->reg8))); /* restore lower 16 bits of $8 */
+
+ ctx.retval = mips32_pracc_queue_exec(ejtag_info, &ctx, val);
+exit:
+ pracc_queue_free(&ctx);
+ return ctx.retval;
+
+ /**
+ * 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
+ **/
+}
-//NC: use destination pointer as loop counter (last address is in $10)
- 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
- };
-
- /* TODO remove array */
- uint32_t param_in[count + 2];
- param_in[0] = addr;
- param_in[1] = addr + count * sizeof(uint32_t); //last address
-
- memcpy(¶m_in[2], buf, count * sizeof(uint32_t));
-
- mips32_pracc_exec(ejtag_info, sizeof(code)/sizeof(code[0]), code, \
- sizeof(param_in)/sizeof(param_in[0]),param_in, 0, NULL, 1);
-
- return ERROR_OK;
+int mips32_cp0_write(struct mips_ejtag *ejtag_info, uint32_t val, uint32_t cp0_reg, uint32_t cp0_sel)
+{
+ struct pracc_queue_info ctx = {.max_code = 6};
+ pracc_queue_init(&ctx);
+ if (ctx.retval != ERROR_OK)
+ goto exit;
+
+ pracc_add(&ctx, 0, MIPS32_MTC0(15, 31, 0)); /* move $15 to COP0 DeSave */
+ pracc_add(&ctx, 0, MIPS32_LUI(15, UPPER16(val))); /* Load val to $15 */
+ pracc_add(&ctx, 0, MIPS32_ORI(15, 15, LOWER16(val)));
+
+ pracc_add(&ctx, 0, MIPS32_MTC0(15, 0, 0) | (cp0_reg << 11) | cp0_sel); /* write cp0 reg / sel */
+
+ pracc_add(&ctx, 0, MIPS32_B(NEG16(ctx.code_count + 1))); /* jump to start */
+ pracc_add(&ctx, 0, MIPS32_MFC0(15, 31, 0)); /* move COP0 DeSave to $15 */
+
+ ctx.retval = mips32_pracc_queue_exec(ejtag_info, &ctx, NULL);
+exit:
+ pracc_queue_free(&ctx);
+ return ctx.retval;
+
+ /**
+ * 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
+ **/
}
-int mips32_pracc_write_u32(mips_ejtag_t *ejtag_info, uint32_t addr, uint32_t *buf)
+/**
+ * \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)
{
- uint32_t code[] = {
+ static const uint32_t code[] = {
/* start: */
- MIPS32_MTC0(15,31,0), /* move $15 to COP0 DeSave */
- MIPS32_LUI(15,UPPER16(MIPS32_PRACC_STACK)), /* $15 = MIPS32_PRACC_STACK */
- MIPS32_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 */
+ MIPS32_MTC0(15, 31, 0), /* move $15 to COP0 DeSave */
+ MIPS32_LUI(15, UPPER16(MIPS32_PRACC_STACK)), /* $15 = MIPS32_PRACC_STACK */
+ MIPS32_ORI(15, 15, LOWER16(MIPS32_PRACC_STACK)),
+ MIPS32_SW(8, 0, 15), /* sw $8,($15) */
+ MIPS32_SW(9, 0, 15), /* sw $9,($15) */
+ MIPS32_SW(10, 0, 15), /* sw $10,($15) */
+ MIPS32_SW(11, 0, 15), /* sw $11,($15) */
+
+ MIPS32_LUI(8, UPPER16(MIPS32_PRACC_PARAM_IN)), /* $8 = MIPS32_PRACC_PARAM_IN */
+ MIPS32_ORI(8, 8, LOWER16(MIPS32_PRACC_PARAM_IN)),
+ MIPS32_LW(9, 0, 8), /* Load write start_addr to $9 */
+ MIPS32_LW(10, 4, 8), /* Load write end_addr to $10 */
+
+ MIPS32_RDHWR(11, MIPS32_SYNCI_STEP), /* $11 = MIPS32_SYNCI_STEP */
+ MIPS32_BEQ(11, 0, 6), /* beq $11, $0, end */
MIPS32_NOP,
+ /* synci_loop : */
+ MIPS32_SYNCI(0, 9), /* synci 0($9) */
+ MIPS32_SLTU(8, 10, 9), /* sltu $8, $10, $9 # $8 = $10 < $9 ? 1 : 0 */
+ MIPS32_BNE(8, 0, NEG16(3)), /* bne $8, $0, synci_loop */
+ MIPS32_ADDU(9, 9, 11), /* $9 += MIPS32_SYNCI_STEP */
+ MIPS32_SYNC,
+ /* end: */
+ MIPS32_LW(11, 0, 15), /* lw $11,($15) */
+ MIPS32_LW(10, 0, 15), /* lw $10,($15) */
+ MIPS32_LW(9, 0, 15), /* lw $9,($15) */
+ MIPS32_LW(8, 0, 15), /* lw $8,($15) */
+ MIPS32_B(NEG16(24)), /* b start */
+ MIPS32_MFC0(15, 31, 0), /* move COP0 DeSave to $15 */
};
/* TODO remove array */
- uint32_t param_in[1 + 1];
- param_in[0] = addr;
- param_in[1] = *buf;
+ uint32_t *param_in = malloc(2 * sizeof(uint32_t));
+ int retval;
+ param_in[0] = start_addr;
+ param_in[1] = end_addr;
- mips32_pracc_exec(ejtag_info, sizeof(code)/sizeof(code[0]), code, \
- sizeof(param_in)/sizeof(param_in[0]),param_in, 0, NULL, 1);
+ retval = mips32_pracc_exec(ejtag_info, ARRAY_SIZE(code), code, 2, param_in, 0, NULL, 1);
- return ERROR_OK;
+ free(param_in);
+
+ return retval;
}
-int mips32_pracc_write_mem16(mips_ejtag_t *ejtag_info, uint32_t addr, int count, uint16_t *buf)
+/**
+ * \b mips32_pracc_clean_invalidate_cache
+ *
+ * Writeback D$ 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)
{
- uint32_t code[] = {
+ static const uint32_t code[] = {
/* start: */
- MIPS32_MTC0(15,31,0), /* move $15 to COP0 DeSave */
- MIPS32_LUI(15,UPPER16(MIPS32_PRACC_STACK)), /* $15 = MIPS32_PRACC_STACK */
- MIPS32_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_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,
- /* loop: */
- MIPS32_BEQ(0,10,9), /* beq $0, $10, end */
- MIPS32_NOP,
-
- MIPS32_LW(11,0,8), /* lw $11,0($8), Load $11 with the word @mem[$8] */
- MIPS32_SH(11,0,9), /* sh $11,0($9) */
-
- MIPS32_ADDI(10,10,NEG16(1)), /* $10-- */
- MIPS32_ADDI(9,9,2), /* $9 += 2 */
- MIPS32_ADDI(8,8,4), /* $8 += 4 */
-
- MIPS32_NOP,
- MIPS32_B(NEG16(9)), /* b loop */
+
+ 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_MFC0(15,31,0), /* move COP0 DeSave to $15 */
- MIPS32_NOP,
- MIPS32_B(NEG16(30)), /* b start */
- MIPS32_NOP,
+ MIPS32_LW(11, 0, 15), /* lw $11,($15) */
+ MIPS32_LW(10, 0, 15), /* lw $10,($15) */
+ MIPS32_LW(9, 0, 15), /* lw $9,($15) */
+ MIPS32_LW(8, 0, 15), /* lw $8,($15) */
+ MIPS32_B(NEG16(25)), /* b start */
+ MIPS32_MFC0(15, 31, 0), /* move COP0 DeSave to $15 */
};
-
+
+ /**
+ * Find cache line size in bytes
+ */
+ uint32_t conf;
+ uint32_t dl, clsiz;
+
+ mips32_cp0_read(ejtag_info, &conf, 16, 1);
+ dl = (conf & MIPS32_CONFIG1_DL_MASK) >> MIPS32_CONFIG1_DL_SHIFT;
+
+ /* dl encoding : dl=1 => 4 bytes, dl=2 => 8 bytes, etc... */
+ clsiz = 0x2 << dl;
+
/* TODO remove array */
- uint32_t param_in[count + 2];
- int i;
- param_in[0] = addr;
- param_in[1] = count;
-
- for (i = 0; i < count; i++)
- {
- param_in[i + 2] = buf[i];
+ uint32_t *param_in = malloc(3 * sizeof(uint32_t));
+ int retval;
+ param_in[0] = start_addr;
+ param_in[1] = end_addr;
+ param_in[2] = clsiz;
+
+ retval = mips32_pracc_exec(ejtag_info, ARRAY_SIZE(code), code, 3, param_in, 0, NULL, 1);
+
+ free(param_in);
+
+ return retval;
+}
+
+static int mips32_pracc_write_mem_generic(struct mips_ejtag *ejtag_info, uint32_t addr, int size, int count, void *buf)
+{
+ struct pracc_queue_info ctx = {.max_code = 128 * 3 + 6 + 1}; /* alloc memory for the worst case */
+ pracc_queue_init(&ctx);
+ if (ctx.retval != ERROR_OK)
+ goto exit;
+
+ uint32_t *buf32 = buf;
+ uint16_t *buf16 = buf;
+ 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));
+
+ pracc_add(&ctx, 0, MIPS32_MTC0(15, 31, 0)); /* save $15 in DeSave */
+ pracc_add(&ctx, 0, MIPS32_LUI(15, last_upper_base_addr)); /* load $15 with memory base address */
+
+ 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) {
+ pracc_add(&ctx, 0, MIPS32_LUI(15, upper_base_addr)); /* if needed, change upper address in $15*/
+ last_upper_base_addr = upper_base_addr;
+ }
+
+ if (size == 4) { /* for word writes check if one half word is 0 and load it accordingly */
+ if (LOWER16(*buf32) == 0)
+ pracc_add(&ctx, 0, MIPS32_LUI(8, UPPER16(*buf32))); /* load only upper value */
+ else if (UPPER16(*buf32) == 0)
+ pracc_add(&ctx, 0, MIPS32_ORI(8, 0, LOWER16(*buf32))); /* load only lower */
+ else {
+ pracc_add(&ctx, 0, MIPS32_LUI(8, UPPER16(*buf32))); /* load upper and lower */
+ pracc_add(&ctx, 0, MIPS32_ORI(8, 8, LOWER16(*buf32)));
+ }
+ pracc_add(&ctx, 0, MIPS32_SW(8, LOWER16(addr), 15)); /* store word to memory */
+ buf32++;
+
+ } else if (size == 2) {
+ pracc_add(&ctx, 0, MIPS32_ORI(8, 0, *buf16)); /* load lower value */
+ pracc_add(&ctx, 0, MIPS32_SH(8, LOWER16(addr), 15)); /* store half word to memory */
+ buf16++;
+
+ } else {
+ pracc_add(&ctx, 0, MIPS32_ORI(8, 0, *buf8)); /* load lower value */
+ pracc_add(&ctx, 0, MIPS32_SB(8, LOWER16(addr), 15)); /* store byte to memory */
+ buf8++;
+ }
+ addr += size;
+ }
+
+ pracc_add(&ctx, 0, MIPS32_LUI(8, UPPER16(ejtag_info->reg8))); /* restore upper 16 bits of reg 8 */
+ pracc_add(&ctx, 0, MIPS32_ORI(8, 8, LOWER16(ejtag_info->reg8))); /* restore lower 16 bits of reg 8 */
+
+ pracc_add(&ctx, 0, MIPS32_B(NEG16(ctx.code_count + 1))); /* jump to start */
+ pracc_add(&ctx, 0, MIPS32_MFC0(15, 31, 0)); /* restore $15 from DeSave */
+
+ ctx.retval = mips32_pracc_queue_exec(ejtag_info, &ctx, NULL);
+ if (ctx.retval != ERROR_OK)
+ goto exit;
+ count -= this_round_count;
}
-
- mips32_pracc_exec(ejtag_info, sizeof(code)/sizeof(code[0]), code, \
- sizeof(param_in)/sizeof(param_in[0]), param_in, 0, NULL, 1);
+exit:
+ pracc_queue_free(&ctx);
+ return ctx.retval;
+}
- return ERROR_OK;
+int mips32_pracc_write_mem(struct mips_ejtag *ejtag_info, uint32_t addr, int size, int count, void *buf)
+{
+ int retval = mips32_pracc_write_mem_generic(ejtag_info, addr, size, count, buf);
+ if (retval != ERROR_OK)
+ return retval;
+
+ /**
+ * If we are in the cachable regoion and cache is activated,
+ * we must clean D$ + 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)
+ */
+ uint32_t conf = 0;
+ int cached = 0;
+
+ if ((KSEGX(addr) == KSEG1) || ((addr >= 0xff200000) && (addr <= 0xff3fffff)))
+ return retval; /*Nothing to do*/
+
+ 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;
+ }
+
+ /**
+ * Check cachablitiy bits coherency algorithm -
+ * is the region cacheable or uncached.
+ * If cacheable we have to synchronize the cache
+ */
+ if (cached == 0x3) {
+ uint32_t start_addr, end_addr;
+ uint32_t rel;
+
+ start_addr = addr;
+ end_addr = addr + count * size;
+
+ /** select cache synchronisation mechanism based on Architecture Release */
+ rel = (conf & MIPS32_CONFIG0_AR_MASK) >> MIPS32_CONFIG0_AR_SHIFT;
+ switch (rel) {
+ case MIPS32_ARCH_REL1:
+ /* MIPS32/64 Release 1 - we must use cache instruction */
+ mips32_pracc_clean_invalidate_cache(ejtag_info, start_addr, end_addr);
+ break;
+ case MIPS32_ARCH_REL2:
+ /* MIPS32/64 Release 2 - we can use synci instruction */
+ mips32_pracc_sync_cache(ejtag_info, start_addr, end_addr);
+ break;
+ default:
+ /* what ? */
+ break;
+ }
+ }
+
+ return retval;
}
-int mips32_pracc_write_mem8(mips_ejtag_t *ejtag_info, uint32_t addr, int count, uint8_t *buf)
+int mips32_pracc_write_regs(struct mips_ejtag *ejtag_info, uint32_t *regs)
{
- 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,
-
- MIPS32_LW(11,0,8), /* lw $11,0($8), Load $11 with the word @mem[$8] */
- MIPS32_SB(11,0,9), /* sb $11,0($9) */
-
- MIPS32_ADDI(10,10,NEG16(1)), /* $10-- */
- MIPS32_ADDI(9,9,1), /* $9 += 1 */
- MIPS32_ADDI(8,8,4), /* $8 += 4 */
-
- MIPS32_NOP,
- MIPS32_B(NEG16(9)), /* b loop */
- MIPS32_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,
+ 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) */
};
-
- /* TODO remove array */
- uint32_t param_in[count + 2];
- int retval;
- int i;
- param_in[0] = addr;
- param_in[1] = count;
-
- for (i = 0; i < count; i++)
- {
- param_in[i + 2] = buf[i];
+
+ struct pracc_queue_info ctx = {.max_code = 37 * 2 + 6 + 1};
+ pracc_queue_init(&ctx);
+ if (ctx.retval != ERROR_OK)
+ goto exit;
+
+ /* load registers 2 to 31 with lui and ori instructions, check if some instructions can be saved */
+ for (int i = 2; i < 32; i++) {
+ if (LOWER16((regs[i])) == 0) /* if lower half word is 0, lui instruction only */
+ pracc_add(&ctx, 0, MIPS32_LUI(i, UPPER16((regs[i]))));
+ else if (UPPER16((regs[i])) == 0) /* if upper half word is 0, ori with $0 only*/
+ pracc_add(&ctx, 0, MIPS32_ORI(i, 0, LOWER16((regs[i]))));
+ else { /* default, load with lui and ori instructions */
+ pracc_add(&ctx, 0, MIPS32_LUI(i, UPPER16((regs[i]))));
+ pracc_add(&ctx, 0, MIPS32_ORI(i, i, LOWER16((regs[i]))));
+ }
}
-
- retval = mips32_pracc_exec(ejtag_info, sizeof(code)/sizeof(code[0]), code, \
- sizeof(param_in)/sizeof(param_in[0]), param_in, 0, NULL, 1);
- return retval;
+ for (int i = 0; i != 6; i++) {
+ pracc_add(&ctx, 0, MIPS32_LUI(1, UPPER16((regs[i + 32])))); /* load CPO value in $1, with lui and ori */
+ pracc_add(&ctx, 0, MIPS32_ORI(1, 1, LOWER16((regs[i + 32]))));
+ pracc_add(&ctx, 0, cp0_write_code[i]); /* write value from $1 to CPO register */
+ }
+
+ pracc_add(&ctx, 0, MIPS32_LUI(1, UPPER16((regs[1])))); /* load upper half word in $1 */
+ pracc_add(&ctx, 0, MIPS32_B(NEG16(ctx.code_count + 1))); /* jump to start */
+ pracc_add(&ctx, 0, MIPS32_ORI(1, 1, LOWER16((regs[1])))); /* load lower half word in $1 */
+
+ ctx.retval = mips32_pracc_queue_exec(ejtag_info, &ctx, NULL);
+
+ ejtag_info->reg8 = regs[8];
+ ejtag_info->reg9 = regs[9];
+exit:
+ pracc_queue_free(&ctx);
+ return ctx.retval;
}
-int mips32_pracc_write_regs(mips_ejtag_t *ejtag_info, uint32_t *regs)
+int mips32_pracc_read_regs(struct mips_ejtag *ejtag_info, uint32_t *regs)
{
- 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,
+ static int cp0_read_code[] = {
+ MIPS32_MFC0(8, 12, 0), /* move status to $8 */
+ MIPS32_MFLO(8), /* move lo to $8 */
+ MIPS32_MFHI(8), /* move hi to $8 */
+ MIPS32_MFC0(8, 8, 0), /* move badvaddr to $8 */
+ MIPS32_MFC0(8, 13, 0), /* move cause to $8 */
+ MIPS32_MFC0(8, 24, 0), /* move depc (pc) to $8 */
};
-
- int retval;
-
- retval = mips32_pracc_exec(ejtag_info, sizeof(code)/sizeof(code[0]), code, \
- 38, regs, 0, NULL, 1);
-
- return retval;
+
+ struct pracc_queue_info ctx = {.max_code = 48};
+ pracc_queue_init(&ctx);
+ if (ctx.retval != ERROR_OK)
+ goto exit;
+
+ pracc_add(&ctx, 0, MIPS32_MTC0(1, 31, 0)); /* move $1 to COP0 DeSave */
+ pracc_add(&ctx, 0, MIPS32_LUI(1, PRACC_UPPER_BASE_ADDR)); /* $1 = MIP32_PRACC_BASE_ADDR */
+
+ for (int i = 2; i != 32; i++) /* store GPR's 2 to 31 */
+ pracc_add(&ctx, MIPS32_PRACC_PARAM_OUT + (i * 4),
+ MIPS32_SW(i, PRACC_OUT_OFFSET + (i * 4), 1));
+
+ for (int i = 0; i != 6; i++) {
+ pracc_add(&ctx, 0, cp0_read_code[i]); /* load COP0 needed registers to $8 */
+ pracc_add(&ctx, MIPS32_PRACC_PARAM_OUT + (i + 32) * 4, /* store $8 at PARAM OUT */
+ MIPS32_SW(8, PRACC_OUT_OFFSET + (i + 32) * 4, 1));
+ }
+ pracc_add(&ctx, 0, MIPS32_MFC0(8, 31, 0)); /* move DeSave to $8, reg1 value */
+ pracc_add(&ctx, MIPS32_PRACC_PARAM_OUT + 4, /* store reg1 value from $8 to param out */
+ MIPS32_SW(8, PRACC_OUT_OFFSET + 4, 1));
+
+ pracc_add(&ctx, 0, MIPS32_B(NEG16(ctx.code_count + 1))); /* jump to start */
+ pracc_add(&ctx, 0, MIPS32_MFC0(1, 31, 0)); /* move COP0 DeSave to $1, restore reg1 */
+
+ if (ejtag_info->mode == 0)
+ ctx.store_count++; /* Needed by legacy code, due to offset from reg0 */
+
+ ctx.retval = mips32_pracc_queue_exec(ejtag_info, &ctx, regs);
+
+ ejtag_info->reg8 = regs[8]; /* reg8 is saved but not restored, next called function should restore it */
+ ejtag_info->reg9 = regs[9];
+exit:
+ pracc_queue_free(&ctx);
+ return ctx.retval;
}
-int mips32_pracc_read_regs(mips_ejtag_t *ejtag_info, uint32_t *regs)
+/* fastdata upload/download requires an initialized working area
+ * to load the download code; it should not be called otherwise
+ * fetch order from the fastdata area
+ * 1. start addr
+ * 2. end addr
+ * 3. data ...
+ */
+int mips32_pracc_fastdata_xfer(struct mips_ejtag *ejtag_info, struct working_area *source,
+ int write_t, uint32_t addr, int count, uint32_t *buf)
{
- uint32_t 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 */
+ uint32_t handler_code[] = {
+ /* caution when editing, table is modified below */
+ /* r15 points to the start of this code */
+ MIPS32_SW(8, MIPS32_FASTDATA_HANDLER_SIZE - 4, 15),
+ MIPS32_SW(9, MIPS32_FASTDATA_HANDLER_SIZE - 8, 15),
+ MIPS32_SW(10, MIPS32_FASTDATA_HANDLER_SIZE - 12, 15),
+ MIPS32_SW(11, MIPS32_FASTDATA_HANDLER_SIZE - 16, 15),
+ /* start of fastdata area in t0 */
+ MIPS32_LUI(8, UPPER16(MIPS32_PRACC_FASTDATA_AREA)),
+ MIPS32_ORI(8, 8, LOWER16(MIPS32_PRACC_FASTDATA_AREA)),
+ MIPS32_LW(9, 0, 8), /* start addr in t1 */
+ MIPS32_LW(10, 0, 8), /* end addr to t2 */
+ /* loop: */
+ /* 8 */ MIPS32_LW(11, 0, 0), /* lw t3,[t8 | r9] */
+ /* 9 */ MIPS32_SW(11, 0, 0), /* sw t3,[r9 | r8] */
+ MIPS32_BNE(10, 9, NEG16(3)), /* bne $t2,t1,loop */
+ MIPS32_ADDI(9, 9, 4), /* addi t1,t1,4 */
+
+ MIPS32_LW(8, MIPS32_FASTDATA_HANDLER_SIZE - 4, 15),
+ MIPS32_LW(9, MIPS32_FASTDATA_HANDLER_SIZE - 8, 15),
+ MIPS32_LW(10, MIPS32_FASTDATA_HANDLER_SIZE - 12, 15),
+ MIPS32_LW(11, MIPS32_FASTDATA_HANDLER_SIZE - 16, 15),
+
+ MIPS32_LUI(15, UPPER16(MIPS32_PRACC_TEXT)),
+ MIPS32_ORI(15, 15, LOWER16(MIPS32_PRACC_TEXT)),
+ MIPS32_JR(15), /* jr start */
+ MIPS32_MFC0(15, 31, 0), /* move COP0 DeSave to $15 */
+ };
+
+ uint32_t jmp_code[] = {
+ MIPS32_MTC0(15, 31, 0), /* move $15 to COP0 DeSave */
+ /* 1 */ MIPS32_LUI(15, 0), /* addr of working area added below */
+ /* 2 */ MIPS32_ORI(15, 15, 0), /* addr of working area added below */
+ MIPS32_JR(15), /* jump to ram program */
MIPS32_NOP,
};
-
- int retval;
-
- retval = mips32_pracc_exec(ejtag_info, sizeof(code)/sizeof(code[0]), code, \
- 0, NULL, 38, regs, 1);
-
+
+ int retval, i;
+ uint32_t val, ejtag_ctrl, address;
+
+ if (source->size < MIPS32_FASTDATA_HANDLER_SIZE)
+ return ERROR_TARGET_RESOURCE_NOT_AVAILABLE;
+
+ if (write_t) {
+ handler_code[8] = MIPS32_LW(11, 0, 8); /* load data from probe at fastdata area */
+ handler_code[9] = MIPS32_SW(11, 0, 9); /* store data to RAM @ r9 */
+ } else {
+ handler_code[8] = MIPS32_LW(11, 0, 9); /* load data from RAM @ r9 */
+ handler_code[9] = MIPS32_SW(11, 0, 8); /* store data to probe at fastdata area */
+ }
+
+ /* write program into RAM */
+ if (write_t != ejtag_info->fast_access_save) {
+ mips32_pracc_write_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 < (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);
+ }
+
+ /* 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;
+
+ if (address != MIPS32_PRACC_FASTDATA_AREA)
+ return ERROR_FAIL;
+
+ /* Send the load start address */
+ 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, &ejtag_ctrl);
+ 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);
+
+ unsigned num_clocks = 0; /* like in legacy code */
+ if (ejtag_info->mode != 0)
+ num_clocks = ((uint64_t)(ejtag_info->scan_delay) * jtag_get_speed_khz() + 500000) / 1000000;
+
+ for (i = 0; i < count; i++) {
+ jtag_add_clocks(num_clocks);
+ retval = mips_ejtag_fastdata_scan(ejtag_info, write_t, buf++);
+ if (retval != ERROR_OK)
+ return retval;
+ }
+
+ retval = jtag_execute_queue();
+ if (retval != ERROR_OK) {
+ LOG_ERROR("fastdata load failed");
+ return retval;
+ }
+
+ retval = wait_for_pracc_rw(ejtag_info, &ejtag_ctrl);
+ 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)
+ LOG_ERROR("mini program did not return to start");
+
return retval;
}
Code Review / openocd.git / blobdiff