int mips32_pracc_write_mem8(struct mips_ejtag *ejtag_info, uint32_t addr, int count, uint8_t *buf)
{
static const uint32_t code[] = {
/* start: */
MIPS32_MTC0(15,31,0), /* move $15 to COP0 DeSave */
MIPS32_LUI(15,UPPER16(MIPS32_PRACC_STACK)), /* $15 = MIPS32_PRACC_STACK */
MIPS32_ORI(15,15,LOWER16(MIPS32_PRACC_STACK)),
MIPS32_SW(8,0,15), /* sw $8,($15) */
MIPS32_SW(9,0,15), /* sw $9,($15) */
MIPS32_SW(10,0,15), /* sw $10,($15) */
MIPS32_SW(11,0,15), /* sw $11,($15) */
MIPS32_LUI(8,UPPER16(MIPS32_PRACC_PARAM_IN)), /* $8 = MIPS32_PRACC_PARAM_IN */
MIPS32_ORI(8,8,LOWER16(MIPS32_PRACC_PARAM_IN)),
MIPS32_LW(9,0,8), /* Load write addr to $9 */
MIPS32_LW(10,4,8), /* Load write count to $10 */
MIPS32_ADDI(8,8,8), /* $8 += 8 */
/* 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 */
};
/* 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;
for (i = 0; i < count; i++)
{
param_in[i + 2] = buf[i];
}
retval = mips32_pracc_exec(ejtag_info, ARRAY_SIZE(code), code, \
count + 2, param_in, 0, NULL, 1);
free(param_in);
return retval;
}
static int mips32_pracc_write_mem32(struct mips_ejtag *ejtag_info, uint32_t addr, int count, uint32_t *buf)
{
static const uint32_t code[] = {
/* start: */
MIPS32_MTC0(15,31,0), /* move $15 to COP0 DeSave */
MIPS32_LUI(15,UPPER16(MIPS32_PRACC_STACK)), /* $15 = MIPS32_PRACC_STACK */
MIPS32_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 */
};
/* 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 */
memcpy(¶m_in[2], buf, count * sizeof(uint32_t));
int retval;
retval = mips32_pracc_exec(ejtag_info, ARRAY_SIZE(code), code,
count + 2, param_in, 0, NULL, 1);
free(param_in);
return retval;
}
static int mips32_pracc_read_mem8(struct mips_ejtag *ejtag_info, uint32_t addr, int count, uint8_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 */
};
/* 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 retval = ERROR_OK;
int blocksize;
uint32_t param_in[2];
int bytesread = 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, count, ¶m_out[bytesread], 1);
if (retval != ERROR_OK)
return retval;
count -= blocksize;
addr += blocksize;
bytesread += blocksize;
}
int i;
for (i = 0; i < bytesread; i++)
buf[i] = param_out[i];
free(param_out);
return retval;
}
static int mips32_pracc_read_mem32(struct mips_ejtag *ejtag_info, uint32_t addr, int count, uint32_t *buf)
{
static const uint32_t code[] = {
/* start: */
MIPS32_MTC0(15, 31, 0), /* move $15 to COP0 DeSave */
MIPS32_LUI(15, UPPER16(MIPS32_PRACC_STACK)), /* $15 = MIPS32_PRACC_STACK */
MIPS32_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;
}
return retval;
}
/* fastdata upload/download requires an initialized working area
* to load the download code; it should not be called otherwise
* fetch order from the fastdata area
* 1. start addr
* 2. end addr
* 3. data ...
*/
int mips32_pracc_fastdata_xfer(struct mips_ejtag *ejtag_info, struct working_area *source,
int write, uint32_t addr, int count, uint32_t *buf)
{
uint32_t handler_code[] = {
/* caution when editing, table is modified below */
/* r15 points to the start of this code */
MIPS32_SW(8,MIPS32_FASTDATA_HANDLER_SIZE - 4,15),
MIPS32_SW(9,MIPS32_FASTDATA_HANDLER_SIZE - 8,15),
MIPS32_SW(10,MIPS32_FASTDATA_HANDLER_SIZE - 12,15),
MIPS32_SW(11,MIPS32_FASTDATA_HANDLER_SIZE - 16,15),
/* start of fastdata area in t0 */
MIPS32_LUI(8,UPPER16(MIPS32_PRACC_FASTDATA_AREA)),
MIPS32_ORI(8,8,LOWER16(MIPS32_PRACC_FASTDATA_AREA)),
MIPS32_LW(9,0,8), /* start addr in t1 */
MIPS32_LW(10,0,8), /* end addr to t2 */
/* loop: */
/* 8 */ MIPS32_LW(11,0,0), /* lw t3,[t8 | r9] */
/* 9 */ MIPS32_SW(11,0,0), /* sw t3,[r9 | r8] */
MIPS32_BNE(10,9,NEG16(3)), /* bne $t2,t1,loop */
MIPS32_ADDI(9,9,4), /* addi t1,t1,4 */
MIPS32_LW(8,MIPS32_FASTDATA_HANDLER_SIZE - 4,15),
MIPS32_LW(9,MIPS32_FASTDATA_HANDLER_SIZE - 8,15),
MIPS32_LW(10,MIPS32_FASTDATA_HANDLER_SIZE - 12,15),
MIPS32_LW(11,MIPS32_FASTDATA_HANDLER_SIZE - 16,15),
MIPS32_LUI(15,UPPER16(MIPS32_PRACC_TEXT)),
MIPS32_ORI(15,15,LOWER16(MIPS32_PRACC_TEXT)),
MIPS32_JR(15), /* jr start */
MIPS32_MFC0(15,31,0), /* move COP0 DeSave to $15 */
};
uint32_t jmp_code[] = {
MIPS32_MTC0(15,31,0), /* move $15 to COP0 DeSave */
/* 1 */ MIPS32_LUI(15,0), /* addr of working area added below */
/* 2 */ MIPS32_ORI(15,15,0), /* addr of working area added below */
MIPS32_JR(15), /* jump to ram program */
MIPS32_NOP,
};
int retval, i;
uint32_t val, ejtag_ctrl, address;
if (source->size < MIPS32_FASTDATA_HANDLER_SIZE)
return ERROR_TARGET_RESOURCE_NOT_AVAILABLE;
if (write)
{
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 */
mips32_pracc_write_mem32(ejtag_info, source->address, ARRAY_SIZE(handler_code), handler_code);
LOG_DEBUG("%s using 0x%.8" PRIx32 " for write handler\n", __func__, source->address);
jmp_code[1] |= UPPER16(source->address);
jmp_code[2] |= LOWER16(source->address);
for (i = 0; i < (int) ARRAY_SIZE(jmp_code); i++)
{
if ((retval = wait_for_pracc_rw(ejtag_info, &ejtag_ctrl)) != ERROR_OK)
return retval;
mips_ejtag_set_instr(ejtag_info, EJTAG_INST_DATA, NULL);
mips_ejtag_drscan_32(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, NULL);
mips_ejtag_drscan_32(ejtag_info, &ejtag_ctrl);
}
if ((retval = wait_for_pracc_rw(ejtag_info, &ejtag_ctrl)) != ERROR_OK)
return retval;
/* next fetch to dmseg should be in FASTDATA_AREA, check */
address = 0;
mips_ejtag_set_instr(ejtag_info, EJTAG_INST_ADDRESS, NULL);
mips_ejtag_drscan_32(ejtag_info, &address);
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, NULL);
mips_ejtag_fastdata_scan(ejtag_info, 1, &val);
/* Send the load end address */
val = addr + (count - 1) * 4;
mips_ejtag_set_instr(ejtag_info, EJTAG_INST_FASTDATA, NULL);
mips_ejtag_fastdata_scan(ejtag_info, 1, &val);
for (i = 0; i < count; i++)
{
/* Send the data out using fastdata (clears the access pending bit) */
if ((retval = mips_ejtag_fastdata_scan(ejtag_info, write, buf++)) != ERROR_OK)
return retval;
}
if ((retval = jtag_execute_queue()) != ERROR_OK)
{
LOG_ERROR("fastdata load failed");
return retval;
}
if ((retval = wait_for_pracc_rw(ejtag_info, &ejtag_ctrl)) != ERROR_OK)
return retval;
address = 0;
mips_ejtag_set_instr(ejtag_info, EJTAG_INST_ADDRESS, NULL);
mips_ejtag_drscan_32(ejtag_info, &address);
if (address != MIPS32_PRACC_TEXT)
LOG_ERROR("mini program did not return to start\n");
return retval;
}
int mips32_pracc_read_mem16(struct mips_ejtag *ejtag_info, uint32_t addr, int count, uint16_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_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));
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, ARRAY_SIZE(code), code, \
ARRAY_SIZE(param_in), param_in, count, param_out, 1);
// count -= blocksize;
// addr += blocksize;
// bytesread += blocksize;
}
for (i = 0; i < count; i++)
{
buf[i] = param_out[i];
}
free(param_out);
return ERROR_OK;
}