- write word
- write array of words
-One thing to be aware of is that the MIPS32 cpu will execute the
+One thing to be aware of is that the MIPS32 cpu will execute the
instruction after a branch instruction (one delay slot).
For example:
B foo
LW $1, ($2 +100)
-The LW $1, ($2 +100) instruction is also executed. If this is
+The LW $1, ($2 +100) instruction is also executed. If this is
not wanted a NOP can be inserted:
LW $2, ($5 +10)
#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 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 wait_for_pracc_rw(struct mips_ejtag *ejtag_info, uint32_t *ctrl)
{
uint32_t ejtag_ctrl;
-
- while (1)
+
+ while (1)
{
mips_ejtag_set_instr(ejtag_info, EJTAG_INST_CONTROL, NULL);
ejtag_ctrl = ejtag_info->ejtag_ctrl;
LOG_DEBUG("DEBUGMODULE: No memory access in progress!\n");
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;
{
/* 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);
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);
jtag_add_clocks(5);
jtag_execute_queue();
-
+
return ERROR_OK;
}
-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;
int offset;
- mips_ejtag_t *ejtag_info = ctx->ejtag_info;
+ struct mips_ejtag *ejtag_info = ctx->ejtag_info;
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);
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 )
+ else if ((address >= MIPS32_PRACC_PARAM_OUT)
&& (address <= MIPS32_PRACC_PARAM_OUT + ctx->num_oparam * 4))
{
offset = (address - MIPS32_PRACC_PARAM_OUT) / 4;
LOG_ERROR("Error writing unexpected address %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, 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;
+ 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)
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)
{
{
break;
}
-
+
if ((retval = mips32_pracc_exec_read(&ctx, address)) != ERROR_OK)
return retval;
}
-
+
if (cycle == 0)
break;
}
-
+
/* stack sanity check */
if (ctx.stack_offset != 0)
{
LOG_DEBUG("Pracc Stack not zero");
}
-
+
return ERROR_OK;
}
-int mips32_pracc_read_mem(mips_ejtag_t *ejtag_info, uint32_t addr, int size, int count, void *buf)
+int mips32_pracc_read_mem(struct mips_ejtag *ejtag_info, uint32_t addr, int size, int count, void *buf)
{
switch (size)
{
else
return mips32_pracc_read_mem32(ejtag_info, addr, count, (uint32_t*)buf);
}
-
+
return ERROR_OK;
}
-int mips32_pracc_read_mem32(mips_ejtag_t *ejtag_info, uint32_t addr, int count, uint32_t *buf)
-{
+int mips32_pracc_read_mem32(struct mips_ejtag *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_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 */
/* 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,
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,
+
+ 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;
return retval;
}
-int mips32_pracc_read_u32(mips_ejtag_t *ejtag_info, uint32_t addr, uint32_t *buf)
+int mips32_pracc_read_u32(struct mips_ejtag *ejtag_info, uint32_t addr, uint32_t *buf)
{
uint32_t code[] = {
/* start: */
param_in[0] = addr;
- if ((retval = mips32_pracc_exec(ejtag_info, sizeof(code)/sizeof(code[0]), code,
+ 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;
return retval;
}
-int mips32_pracc_read_mem16(mips_ejtag_t *ejtag_info, uint32_t addr, int count, uint16_t *buf)
+int mips32_pracc_read_mem16(struct mips_ejtag *ejtag_info, uint32_t addr, int count, uint16_t *buf)
{
uint32_t code[] = {
/* start: */
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 */
/* 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 */
// /* 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;
}
-int mips32_pracc_read_mem8(mips_ejtag_t *ejtag_info, uint32_t addr, int count, uint8_t *buf)
+int mips32_pracc_read_mem8(struct mips_ejtag *ejtag_info, uint32_t addr, int count, uint8_t *buf)
{
uint32_t code[] = {
/* start: */
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 */
/* 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_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;
}
-int mips32_pracc_write_mem(mips_ejtag_t *ejtag_info, uint32_t addr, int size, int count, void *buf)
+int mips32_pracc_write_mem(struct mips_ejtag *ejtag_info, uint32_t addr, int size, int count, void *buf)
{
switch (size)
{
else
return mips32_pracc_write_mem32(ejtag_info, addr, count, (uint32_t*)buf);
}
-
+
return ERROR_OK;
}
-int mips32_pracc_write_mem32(mips_ejtag_t *ejtag_info, uint32_t addr, int count, uint32_t *buf)
+int mips32_pracc_write_mem32(struct mips_ejtag *ejtag_info, uint32_t addr, int count, uint32_t *buf)
{
//NC: use destination pointer as loop counter (last address is in $10)
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 */
//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 */
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_pracc_write_u32(mips_ejtag_t *ejtag_info, uint32_t addr, uint32_t *buf)
+int mips32_pracc_write_u32(struct mips_ejtag *ejtag_info, uint32_t addr, uint32_t *buf)
{
uint32_t code[] = {
/* start: */
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
return ERROR_OK;
}
-int mips32_pracc_write_mem16(mips_ejtag_t *ejtag_info, uint32_t addr, int count, uint16_t *buf)
+int mips32_pracc_write_mem16(struct mips_ejtag *ejtag_info, uint32_t addr, int count, uint16_t *buf)
{
uint32_t code[] = {
/* start: */
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 */
/* 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_NOP,
MIPS32_B(NEG16(30)), /* b start */
MIPS32_NOP,
};
-
+
/* 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];
}
-
+
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_pracc_write_mem8(mips_ejtag_t *ejtag_info, uint32_t addr, int count, uint8_t *buf)
+int mips32_pracc_write_mem8(struct mips_ejtag *ejtag_info, uint32_t addr, int count, uint8_t *buf)
{
uint32_t code[] = {
/* start: */
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 */
/* 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,
MIPS32_B(NEG16(30)), /* b start */
MIPS32_NOP,
};
-
+
/* 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];
}
-
+
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;
}
-int mips32_pracc_write_regs(mips_ejtag_t *ejtag_info, uint32_t *regs)
+int mips32_pracc_write_regs(struct mips_ejtag *ejtag_info, uint32_t *regs)
{
uint32_t code[] = {
/* start: */
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_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_B(NEG16(55)), /* b start */
MIPS32_NOP,
};
-
+
int retval;
-
+
retval = mips32_pracc_exec(ejtag_info, sizeof(code)/sizeof(code[0]), code, \
38, regs, 0, NULL, 1);
-
+
return retval;
}
-int mips32_pracc_read_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_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(2,36*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_B(NEG16(60)), /* b start */
MIPS32_NOP,
};
-
+
int retval;
-
+
retval = mips32_pracc_exec(ejtag_info, sizeof(code)/sizeof(code[0]), code, \
0, NULL, 38, regs, 1);
-
+
return retval;
}
projects / fw / openocd / blobdiff