* 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. *
+ * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. *
***************************************************************************/
/*
}
/* save to our debug stack */
data = ctx->stack[--ctx->stack_offset];
+ } else if (address >= 0xFF200000) {
+ /* CPU keeps reading at the end of execution.
+ * If we after 0xF0000000 address range, we can use
+ * one shot jump instruction.
+ * Since this instruction is limited to
+ * 26bit, we need to do some magic to fit it to our needs. */
+ LOG_DEBUG("Reading unexpected address. Jump to 0xFF200200\n");
+ data = MIPS32_J((0x0FFFFFFF & 0xFF200200) >> 2);
} 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;
}
if (retval != ERROR_OK)
return retval;
- if ((address >= MIPS32_PRACC_PARAM_IN)
- && (address < MIPS32_PRACC_PARAM_IN + ctx->num_iparam * 4)) {
- offset = (address - MIPS32_PRACC_PARAM_IN) / 4;
- ctx->local_iparam[offset] = data;
- } else if ((address >= MIPS32_PRACC_PARAM_OUT)
+ 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;
return ERROR_OK;
}
-static int mips32_pracc_read_u32(struct mips_ejtag *ejtag_info, uint32_t addr, uint32_t *buf)
+inline void pracc_queue_init(struct pracc_queue_info *ctx)
{
- 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) */
-
- MIPS32_LUI(8, UPPER16((addr + 0x8000))), /* load $8 with modified upper address */
- MIPS32_LW(8, LOWER16(addr), 8), /* lw $8, LOWER16(addr)($8) */
- MIPS32_SW(8, PRACC_OUT_OFFSET, 15), /* sw $8,PRACC_OUT_OFFSET($15) */
-
- MIPS32_LW(8, PRACC_STACK_OFFSET, 15), /* lw $8,PRACC_STACK_OFFSET($15) */
- MIPS32_B(NEG16(8)), /* b start */
- MIPS32_MFC0(15, 31, 0), /* move COP0 DeSave to $15 */
- };
+ 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;
+ }
+}
+
+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++;
+}
+
+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_queue_exec(struct mips_ejtag *ejtag_info, struct pracc_queue_info *ctx, uint32_t *buf)
+{
+ 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;
+ }
+
+ unsigned num_clocks =
+ ((uint64_t)(ejtag_info->scan_delay) * jtag_get_speed_khz() + 500000) / 1000000;
+
+ 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 != 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];
+
+ jtag_add_clocks(num_clocks);
+ mips_ejtag_add_scan_96(ejtag_info, ejtag_ctrl, data, scan_in[scan_count++].scan_96);
+ }
+
+ 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;
+ }
- return mips32_pracc_exec(ejtag_info, ARRAY_SIZE(code), code, 0, NULL, 1, buf, 1);
+ 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: %" 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);
+
+ } 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: %" PRIx32 " expected: %" PRIx32 " 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_u32(struct mips_ejtag *ejtag_info, uint32_t addr, uint32_t *buf)
+{
+ 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_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);
- int retval = ERROR_FAIL;
-
- uint32_t *code = NULL;
uint32_t *data = NULL;
-
- code = malloc((256 * 2 + 10) * sizeof(uint32_t));
- if (code == NULL) {
- LOG_ERROR("Out of memory");
+ 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));
uint16_t *buf16 = buf;
uint8_t *buf8 = buf;
- int i;
- uint32_t upper_base_addr, last_upper_base_addr;
- int this_round_count;
- int code_len;
-
while (count) {
- this_round_count = (count > 256) ? 256 : count;
- last_upper_base_addr = UPPER16((addr + 0x8000));
- uint32_t *code_p = code;
-
- *code_p++ = MIPS32_MTC0(15, 31, 0); /* save $15 in DeSave */
- *code_p++ = MIPS32_LUI(15, PRACC_UPPER_BASE_ADDR); /* $15 = MIPS32_PRACC_BASE_ADDR */
- *code_p++ = MIPS32_SW(8, PRACC_STACK_OFFSET, 15); /* save $8 and $9 to pracc stack */
- *code_p++ = MIPS32_SW(9, PRACC_STACK_OFFSET, 15);
- *code_p++ = MIPS32_LUI(9, last_upper_base_addr); /* load the upper memory address in $9*/
- code_len = 5;
-
- for (i = 0; i != this_round_count; i++) { /* Main code loop */
- upper_base_addr = UPPER16((addr + 0x8000));
- if (last_upper_base_addr != upper_base_addr) {
- *code_p++ = MIPS32_LUI(9, upper_base_addr); /* if needed, change upper address in $9*/
- code_len++;
+ 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;
}
if (size == 4)
- *code_p++ = MIPS32_LW(8, LOWER16(addr), 9); /* load from memory to $8 */
+ pracc_add(&ctx, 0, MIPS32_LW(8, LOWER16(addr), 9)); /* load from memory to $8 */
else if (size == 2)
- *code_p++ = MIPS32_LHU(8, LOWER16(addr), 9);
+ pracc_add(&ctx, 0, MIPS32_LHU(8, LOWER16(addr), 9));
else
- *code_p++ = MIPS32_LBU(8, LOWER16(addr), 9);
-
- *code_p++ = MIPS32_SW(8, PRACC_OUT_OFFSET + i * 4, 15); /* store $8 at param out */
+ pracc_add(&ctx, 0, MIPS32_LBU(8, LOWER16(addr), 9));
- code_len += 2;
+ 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 */
- *code_p++ = MIPS32_LW(9, PRACC_STACK_OFFSET, 15); /* restore $8 and $9 from pracc stack */
- *code_p++ = MIPS32_LW(8, PRACC_STACK_OFFSET, 15);
-
- code_len += 4;
- *code_p++ = MIPS32_B(NEG16(code_len - 1)); /* jump to start */
- *code_p = MIPS32_MFC0(15, 31, 0); /* restore $15 from DeSave */
+ 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) {
- retval = mips32_pracc_exec(ejtag_info, code_len, code, 0, NULL, this_round_count, buf32, 1);
- if (retval != ERROR_OK)
+ ctx.retval = mips32_pracc_queue_exec(ejtag_info, &ctx, buf32);
+ if (ctx.retval != ERROR_OK)
goto exit;
buf32 += this_round_count;
} else {
- retval = mips32_pracc_exec(ejtag_info, code_len, code, 0, NULL, this_round_count, data, 1);
- if (retval != ERROR_OK)
+ ctx.retval = mips32_pracc_queue_exec(ejtag_info, &ctx, data);
+ if (ctx.retval != ERROR_OK)
goto exit;
+
uint32_t *data_p = data;
- for (i = 0; i != this_round_count; i++) {
+ for (int i = 0; i != this_round_count; i++) {
if (size == 2)
*buf16++ = *data_p++;
else
}
count -= this_round_count;
}
-
exit:
- if (code)
- free(code);
- if (data)
+ pracc_queue_free(&ctx);
+ if (data != NULL)
free(data);
- return retval;
+ 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 */
- };
+ 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
*
* 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);
+ *
+ * code[2] |= (cp0_reg << 11) | cp0_sel; change rd and funct of MIPS32_R_INST macro
+ **/
}
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 = {.max_code = 6};
+ pracc_queue_init(&ctx);
+ if (ctx.retval != ERROR_OK)
+ goto exit;
- /* 3 */ MIPS32_MTC0(15, 0, 0), /* move $15 to COP0 [cp0_reg select] */
+ 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)));
- MIPS32_B(NEG16(5)), /* b start */
- MIPS32_MFC0(15, 31, 0), /* move COP0 DeSave to $15 */
- };
+ 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 */
-
- return mips32_pracc_exec(ejtag_info, ARRAY_SIZE(code), code, 0, NULL, 0, NULL, 1);
+ * code[3] |= (cp0_reg << 11) | cp0_sel; change rd and funct fields of MIPS32_R_INST macro
+ **/
}
/**
static int mips32_pracc_write_mem_generic(struct mips_ejtag *ejtag_info, uint32_t addr, int size, int count, void *buf)
{
- uint32_t *code;
- code = malloc((128 * 3 + 9) * sizeof(uint32_t)); /* alloc memory for the worst case */
- if (code == NULL) {
- LOG_ERROR("Out of memory");
- return ERROR_FAIL;
- }
+ 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;
- int i;
- int retval = ERROR_FAIL;
- uint32_t *code_p;
- uint32_t upper_base_addr, last_upper_base_addr;
- int this_round_count;
- int code_len;
-
while (count) {
- this_round_count = (count > 128) ? 128 : count;
- last_upper_base_addr = UPPER16((addr + 0x8000));
- code_p = code;
-
- *code_p++ = MIPS32_MTC0(15, 31, 0); /* save $15 in DeSave */
- *code_p++ = MIPS32_LUI(15, PRACC_UPPER_BASE_ADDR); /* $15 = MIPS32_PRACC_BASE_ADDR */
- *code_p++ = MIPS32_SW(8, PRACC_STACK_OFFSET, 15); /* save $8 to pracc stack */
- *code_p++ = MIPS32_LUI(15, last_upper_base_addr); /* reuse $15 as memory base address */
- code_len = 4;
-
- for (i = 0; i != this_round_count; i++) {
- upper_base_addr = UPPER16((addr + 0x8000));
+ 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) {
- *code_p++ = MIPS32_LUI(15, upper_base_addr); /* if needed, change upper address in $15*/
- code_len++;
+ 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 write check if one half word is 0 and load it accordingly */
- if (LOWER16(*buf32) == 0) {
- *code_p++ = MIPS32_LUI(8, UPPER16(*buf32)); /* load only upper value */
- code_len++;
- } else if (UPPER16(*buf32) == 0) {
- *code_p++ = MIPS32_ORI(8, 0, LOWER16(*buf32)); /* load only lower value */
- code_len++;
- } else {
- *code_p++ = MIPS32_LUI(8, UPPER16(*buf32)); /* load upper and lower */
- *code_p++ = MIPS32_ORI(8, 8, LOWER16(*buf32));
- code_len += 2;
+ 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)));
}
- *code_p++ = MIPS32_SW(8, LOWER16(addr), 15); /* store word to memory */
- code_len++;
+ pracc_add(&ctx, 0, MIPS32_SW(8, LOWER16(addr), 15)); /* store word to memory */
buf32++;
} else if (size == 2) {
- *code_p++ = MIPS32_ORI(8, 0, *buf16); /* load lower value */
- *code_p++ = MIPS32_SH(8, LOWER16(addr), 15); /* store half word to memory */
- code_len += 2;
+ 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 {
- *code_p++ = MIPS32_ORI(8, 0, *buf8); /* load lower value */
- *code_p++ = MIPS32_SB(8, LOWER16(addr), 15); /* store byte to memory */
- code_len += 2;
+ 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;
}
- *code_p++ = MIPS32_LUI(15, PRACC_UPPER_BASE_ADDR); /* $15 = MIPS32_PRACC_BASE_ADDR */
- *code_p++ = MIPS32_LW(8, PRACC_STACK_OFFSET, 15); /* restore $8 from pracc stack */
+ 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 */
- code_len += 4;
- *code_p++ = MIPS32_B(NEG16(code_len - 1)); /* jump to start */
- *code_p = MIPS32_MFC0(15, 31, 0); /* restore $15 from DeSave */
+ 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 */
- retval = mips32_pracc_exec(ejtag_info, code_len, code, 0, NULL, 0, NULL, 1);
- if (retval != ERROR_OK)
+ ctx.retval = mips32_pracc_queue_exec(ejtag_info, &ctx, NULL);
+ if (ctx.retval != ERROR_OK)
goto exit;
-
count -= this_round_count;
}
-
exit:
- free(code);
- return retval;
+ pracc_queue_free(&ctx);
+ return ctx.retval;
}
int mips32_pracc_write_mem(struct mips_ejtag *ejtag_info, uint32_t addr, int size, int count, void *buf)
MIPS32_MTC0(1, 24, 0), /* move $1 to depc (pc) */
};
- uint32_t *code;
- code = malloc((37 * 2 + 6 + 1) * sizeof(uint32_t)); /* alloc memory for the worst case */
- if (code == NULL) {
- LOG_ERROR("Out of memory");
- return ERROR_FAIL;
- }
+ struct pracc_queue_info ctx = {.max_code = 37 * 2 + 6 + 1};
+ pracc_queue_init(&ctx);
+ if (ctx.retval != ERROR_OK)
+ goto exit;
- uint32_t *code_p = code;
- int code_len = 0;
- /* load registers 2 to 31 with lui an ori instructions, check if same instructions can be saved */
+ /* 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) {
- *code_p++ = MIPS32_LUI(i, UPPER16((regs[i]))); /* if lower half word is 0, lui instruction only */
- code_len++;
- } else if (UPPER16((regs[i])) == 0) {
- *code_p++ = MIPS32_ORI(i, 0, LOWER16((regs[i]))); /* if upper half word is 0, ori with $0 only*/
- code_len++;
- } else {
- *code_p++ = MIPS32_LUI(i, UPPER16((regs[i]))); /* default, load with lui and ori instructions */
- *code_p++ = MIPS32_ORI(i, i, LOWER16((regs[i])));
- code_len += 2;
+ 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]))));
}
}
for (int i = 0; i != 6; i++) {
- *code_p++ = MIPS32_LUI(1, UPPER16((regs[i + 32]))); /* load CPO value in $1, with lui and ori */
- *code_p++ = MIPS32_ORI(1, 1, LOWER16((regs[i + 32])));
- *code_p++ = cp0_write_code[i]; /* write value from $1 to CPO register */
- code_len += 3;
+ 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 */
}
- *code_p++ = MIPS32_LUI(1, UPPER16((regs[1]))); /* load upper half word in $1 */
- code_len += 3;
- *code_p++ = MIPS32_B(NEG16(code_len - 1)), /* b start */
- *code_p = MIPS32_ORI(1, 1, LOWER16((regs[1]))); /* load lower half word in $1 */
+ 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 */
- int retval = mips32_pracc_exec(ejtag_info, code_len, code, 0, NULL, 0, NULL, 1);
- free(code);
- return retval;
+ 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_read_regs(struct mips_ejtag *ejtag_info, uint32_t *regs)
{
static int cp0_read_code[] = {
- MIPS32_MFC0(2, 12, 0), /* move status to $2 */
- MIPS32_MFLO(2), /* move lo to $2 */
- MIPS32_MFHI(2), /* move hi to $2 */
- MIPS32_MFC0(2, 8, 0), /* move badvaddr to $2 */
- MIPS32_MFC0(2, 13, 0), /* move cause to $2 */
- MIPS32_MFC0(2, 24, 0), /* move depc (pc) to $2 */
+ MIPS32_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 */
};
- uint32_t *code;
- code = malloc(49 * sizeof(uint32_t));
- if (code == NULL) {
- LOG_ERROR("Out of memory");
- return ERROR_FAIL;
- }
-
- uint32_t *code_p = code;
+ struct pracc_queue_info ctx = {.max_code = 48};
+ pracc_queue_init(&ctx);
+ if (ctx.retval != ERROR_OK)
+ goto exit;
- *code_p++ = MIPS32_MTC0(1, 31, 0), /* move $1 to COP0 DeSave */
- *code_p++ = MIPS32_LUI(1, PRACC_UPPER_BASE_ADDR); /* $1 = MIP32_PRACC_BASE_ADDR */
+ 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++)
- *code_p++ = MIPS32_SW(i, PRACC_OUT_OFFSET + (i * 4), 1); /* store GPR's 2 to 31 */
+ 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++) {
- *code_p++ = cp0_read_code[i]; /* load COP0 needed registers to $2 */
- *code_p++ = MIPS32_SW(2, PRACC_OUT_OFFSET + (i + 32) * 4, 1); /* store COP0 registers from $2 to param out */
+ 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));
- *code_p++ = MIPS32_MFC0(2, 31, 0), /* move DeSave to $2, reg1 value */
- *code_p++ = MIPS32_SW(2, PRACC_OUT_OFFSET + 4, 1); /* store reg1 value from $2 to param out */
+ 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 */
- *code_p++ = MIPS32_LW(2, PRACC_OUT_OFFSET + 8, 1); /* restore $2 from param out (singularity) */
- *code_p++ = MIPS32_B(NEG16(48)); /* b start */
- *code_p = MIPS32_MFC0(1, 31, 0); /* move COP0 DeSave to $1 */
+ if (ejtag_info->mode == 0)
+ ctx.store_count++; /* Needed by legacy code, due to offset from reg0 */
- int retval = mips32_pracc_exec(ejtag_info, 49, code, 0, NULL, MIPS32NUMCOREREGS, regs, 1);
+ ctx.retval = mips32_pracc_queue_exec(ejtag_info, &ctx, regs);
- free(code);
- return retval;
+ 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;
}
/* fastdata upload/download requires an initialized working area
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;
if (address != 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;
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;
projects / fw / openocd / blobdiff