struct breakpoint *breakpoint);
static int mips_m4k_unset_breakpoint(struct target *target,
struct breakpoint *breakpoint);
+static int mips_m4k_internal_restore(struct target *target, int current,
+ uint32_t address, int handle_breakpoints,
+ int debug_execution);
+static int mips_m4k_halt(struct target *target);
static int mips_m4k_examine_debug_reason(struct target *target)
{
{
struct mips32_common *mips32 = target_to_mips32(target);
struct mips_ejtag *ejtag_info = &mips32->ejtag_info;
- uint32_t debug_reg;
- /* read debug register */
- mips_ejtag_read_debug(ejtag_info, &debug_reg);
+ /* make sure stepping disabled, SSt bit in CP0 debug register cleared */
+ mips_ejtag_config_step(ejtag_info, 0);
+
+ mips32_save_context(target);
/* make sure break unit configured */
mips32_configure_break_unit(target);
/* attempt to find halt reason */
mips_m4k_examine_debug_reason(target);
- /* clear single step if active */
- if (debug_reg & EJTAG_DEBUG_DSS) {
- /* stopped due to single step - clear step bit */
- mips_ejtag_config_step(ejtag_info, 0);
- }
-
- mips32_save_context(target);
-
/* default to mips32 isa, it will be changed below if required */
mips32->isa_mode = MIPS32_ISA_MIPS32;
return ERROR_OK;
}
+static struct target *get_mips_m4k(struct target *target, int32_t coreid)
+{
+ struct target_list *head;
+ struct target *curr;
+
+ head = target->head;
+ while (head != (struct target_list *)NULL) {
+ curr = head->target;
+ if ((curr->coreid == coreid) && (curr->state == TARGET_HALTED))
+ return curr;
+ head = head->next;
+ }
+ return target;
+}
+
+static int mips_m4k_halt_smp(struct target *target)
+{
+ int retval = ERROR_OK;
+ struct target_list *head;
+ struct target *curr;
+ head = target->head;
+ while (head != (struct target_list *)NULL) {
+ int ret = ERROR_OK;
+ curr = head->target;
+ if ((curr != target) && (curr->state != TARGET_HALTED))
+ ret = mips_m4k_halt(curr);
+
+ if (ret != ERROR_OK) {
+ LOG_ERROR("halt failed target->coreid: %d", curr->coreid);
+ retval = ret;
+ }
+ head = head->next;
+ }
+ return retval;
+}
+
+static int update_halt_gdb(struct target *target)
+{
+ int retval = ERROR_OK;
+ if (target->gdb_service->core[0] == -1) {
+ target->gdb_service->target = target;
+ target->gdb_service->core[0] = target->coreid;
+ retval = mips_m4k_halt_smp(target);
+ }
+ return retval;
+}
+
static int mips_m4k_poll(struct target *target)
{
- int retval;
+ int retval = ERROR_OK;
struct mips32_common *mips32 = target_to_mips32(target);
struct mips_ejtag *ejtag_info = &mips32->ejtag_info;
uint32_t ejtag_ctrl = ejtag_info->ejtag_ctrl;
+ enum target_state prev_target_state = target->state;
+
+ /* toggle to another core is done by gdb as follow */
+ /* maint packet J core_id */
+ /* continue */
+ /* the next polling trigger an halt event sent to gdb */
+ if ((target->state == TARGET_HALTED) && (target->smp) &&
+ (target->gdb_service) &&
+ (target->gdb_service->target == NULL)) {
+ target->gdb_service->target =
+ get_mips_m4k(target, target->gdb_service->core[1]);
+ target_call_event_callbacks(target, TARGET_EVENT_HALTED);
+ return retval;
+ }
/* read ejtag control reg */
mips_ejtag_set_instr(ejtag_info, EJTAG_INST_CONTROL);
/* check for processor halted */
if (ejtag_ctrl & EJTAG_CTRL_BRKST) {
- if ((target->state == TARGET_RUNNING) || (target->state == TARGET_RESET)) {
+ if ((target->state != TARGET_HALTED)
+ && (target->state != TARGET_DEBUG_RUNNING)) {
+ if (target->state == TARGET_UNKNOWN)
+ LOG_DEBUG("EJTAG_CTRL_BRKST already set during server startup.");
+
+ /* OpenOCD was was probably started on the board with EJTAG_CTRL_BRKST already set
+ * (maybe put on by HALT-ing the board in the previous session).
+ *
+ * Force enable debug entry for this session.
+ */
mips_ejtag_set_instr(ejtag_info, EJTAG_INST_NORMALBOOT);
-
target->state = TARGET_HALTED;
-
retval = mips_m4k_debug_entry(target);
if (retval != ERROR_OK)
return retval;
+ if (target->smp &&
+ ((prev_target_state == TARGET_RUNNING)
+ || (prev_target_state == TARGET_RESET))) {
+ retval = update_halt_gdb(target);
+ if (retval != ERROR_OK)
+ return retval;
+ }
target_call_event_callbacks(target, TARGET_EVENT_HALTED);
} else if (target->state == TARGET_DEBUG_RUNNING) {
target->state = TARGET_HALTED;
if (retval != ERROR_OK)
return retval;
+ if (target->smp) {
+ retval = update_halt_gdb(target);
+ if (retval != ERROR_OK)
+ return retval;
+ }
+
target_call_event_callbacks(target, TARGET_EVENT_DEBUG_HALTED);
}
} else
{
struct mips_m4k_common *mips_m4k = target_to_m4k(target);
struct mips_ejtag *ejtag_info = &mips_m4k->mips32.ejtag_info;
- int assert_srst = 1;
LOG_DEBUG("target->state: %s",
target_state_name(target));
enum reset_types jtag_reset_config = jtag_get_reset_config();
- if (!(jtag_reset_config & RESET_HAS_SRST))
- assert_srst = 0;
+ /* some cores support connecting while srst is asserted
+ * use that mode is it has been configured */
+
+ bool srst_asserted = false;
+
+ if (!(jtag_reset_config & RESET_SRST_PULLS_TRST) &&
+ (jtag_reset_config & RESET_SRST_NO_GATING)) {
+ jtag_add_reset(0, 1);
+ srst_asserted = true;
+ }
if (target->reset_halt) {
/* use hardware to catch reset */
} else
mips_ejtag_set_instr(ejtag_info, EJTAG_INST_NORMALBOOT);
- if (assert_srst) {
+ if (jtag_reset_config & RESET_HAS_SRST) {
/* here we should issue a srst only, but we may have to assert trst as well */
if (jtag_reset_config & RESET_SRST_PULLS_TRST)
jtag_add_reset(1, 1);
- else
+ else if (!srst_asserted)
jtag_add_reset(0, 1);
} else {
if (mips_m4k->is_pic32mx) {
return ERROR_OK;
}
-static int mips_m4k_resume(struct target *target, int current,
+static int mips_m4k_restore_smp(struct target *target, uint32_t address, int handle_breakpoints)
+{
+ int retval = ERROR_OK;
+ struct target_list *head;
+ struct target *curr;
+
+ head = target->head;
+ while (head != (struct target_list *)NULL) {
+ int ret = ERROR_OK;
+ curr = head->target;
+ if ((curr != target) && (curr->state != TARGET_RUNNING)) {
+ /* resume current address , not in step mode */
+ ret = mips_m4k_internal_restore(curr, 1, address,
+ handle_breakpoints, 0);
+
+ if (ret != ERROR_OK) {
+ LOG_ERROR("target->coreid :%d failed to resume at address :0x%x",
+ curr->coreid, address);
+ retval = ret;
+ }
+ }
+ head = head->next;
+ }
+ return retval;
+}
+
+static int mips_m4k_internal_restore(struct target *target, int current,
uint32_t address, int handle_breakpoints, int debug_execution)
{
struct mips32_common *mips32 = target_to_mips32(target);
if (ejtag_info->impcode & EJTAG_IMP_MIPS16)
buf_set_u32(mips32->core_cache->reg_list[MIPS32_PC].value, 0, 1, mips32->isa_mode);
- resume_pc = buf_get_u32(mips32->core_cache->reg_list[MIPS32_PC].value, 0, 32);
+ if (!current)
+ resume_pc = address;
+ else
+ resume_pc = buf_get_u32(mips32->core_cache->reg_list[MIPS32_PC].value, 0, 32);
mips32_restore_context(target);
return ERROR_OK;
}
+static int mips_m4k_resume(struct target *target, int current,
+ uint32_t address, int handle_breakpoints, int debug_execution)
+{
+ int retval = ERROR_OK;
+
+ /* dummy resume for smp toggle in order to reduce gdb impact */
+ if ((target->smp) && (target->gdb_service->core[1] != -1)) {
+ /* simulate a start and halt of target */
+ target->gdb_service->target = NULL;
+ target->gdb_service->core[0] = target->gdb_service->core[1];
+ /* fake resume at next poll we play the target core[1], see poll*/
+ target_call_event_callbacks(target, TARGET_EVENT_RESUMED);
+ return retval;
+ }
+
+ retval = mips_m4k_internal_restore(target, current, address,
+ handle_breakpoints,
+ debug_execution);
+
+ if (retval == ERROR_OK && target->smp) {
+ target->gdb_service->core[0] = -1;
+ retval = mips_m4k_restore_smp(target, address, handle_breakpoints);
+ }
+
+ return retval;
+}
+
static int mips_m4k_step(struct target *target, int current,
uint32_t address, int handle_breakpoints)
{
/* registers are now invalid */
register_cache_invalidate(mips32->core_cache);
+ LOG_DEBUG("target stepped ");
+ mips_m4k_debug_entry(target);
+
if (breakpoint)
mips_m4k_set_breakpoint(target, breakpoint);
- LOG_DEBUG("target stepped ");
-
- mips_m4k_debug_entry(target);
target_call_event_callbacks(target, TARGET_EVENT_HALTED);
return ERROR_OK;
if (CMD_ARGC == 2) {
uint32_t value;
-
retval = mips32_cp0_read(ejtag_info, &value, cp0_reg, cp0_sel);
if (retval != ERROR_OK) {
command_print(CMD_CTX,
cp0_reg);
return ERROR_OK;
}
- retval = jtag_execute_queue();
- if (retval != ERROR_OK)
- return retval;
-
command_print(CMD_CTX, "cp0 reg %" PRIi32 ", select %" PRIi32 ": %8.8" PRIx32,
cp0_reg, cp0_sel, value);
+
} else if (CMD_ARGC == 3) {
uint32_t value;
COMMAND_PARSE_NUMBER(u32, CMD_ARGV[2], value);
return ERROR_OK;
}
+COMMAND_HANDLER(mips_m4k_handle_smp_off_command)
+{
+ struct target *target = get_current_target(CMD_CTX);
+ /* check target is an smp target */
+ struct target_list *head;
+ struct target *curr;
+ head = target->head;
+ target->smp = 0;
+ if (head != (struct target_list *)NULL) {
+ while (head != (struct target_list *)NULL) {
+ curr = head->target;
+ curr->smp = 0;
+ head = head->next;
+ }
+ /* fixes the target display to the debugger */
+ target->gdb_service->target = target;
+ }
+ return ERROR_OK;
+}
+
+COMMAND_HANDLER(mips_m4k_handle_smp_on_command)
+{
+ struct target *target = get_current_target(CMD_CTX);
+ struct target_list *head;
+ struct target *curr;
+ head = target->head;
+ if (head != (struct target_list *)NULL) {
+ target->smp = 1;
+ while (head != (struct target_list *)NULL) {
+ curr = head->target;
+ curr->smp = 1;
+ head = head->next;
+ }
+ }
+ return ERROR_OK;
+}
+
+COMMAND_HANDLER(mips_m4k_handle_smp_gdb_command)
+{
+ struct target *target = get_current_target(CMD_CTX);
+ int retval = ERROR_OK;
+ struct target_list *head;
+ head = target->head;
+ if (head != (struct target_list *)NULL) {
+ if (CMD_ARGC == 1) {
+ int coreid = 0;
+ COMMAND_PARSE_NUMBER(int, CMD_ARGV[0], coreid);
+ if (ERROR_OK != retval)
+ return retval;
+ target->gdb_service->core[1] = coreid;
+
+ }
+ command_print(CMD_CTX, "gdb coreid %d -> %d", target->gdb_service->core[0]
+ , target->gdb_service->core[1]);
+ }
+ return ERROR_OK;
+}
+
+COMMAND_HANDLER(mips_m4k_handle_scan_delay_command)
+{
+ struct target *target = get_current_target(CMD_CTX);
+ struct mips_m4k_common *mips_m4k = target_to_m4k(target);
+ struct mips_ejtag *ejtag_info = &mips_m4k->mips32.ejtag_info;
+
+ if (CMD_ARGC == 1)
+ COMMAND_PARSE_NUMBER(u32, CMD_ARGV[0], ejtag_info->scan_delay);
+ else if (CMD_ARGC > 1)
+ return ERROR_COMMAND_SYNTAX_ERROR;
+
+ command_print(CMD_CTX, "scan delay: %d nsec", ejtag_info->scan_delay);
+ if (ejtag_info->scan_delay >= 20000000) {
+ ejtag_info->mode = 0;
+ command_print(CMD_CTX, "running in legacy mode");
+ } else {
+ ejtag_info->mode = 1;
+ command_print(CMD_CTX, "running in fast queued mode");
+ }
+
+ return ERROR_OK;
+}
+
static const struct command_registration mips_m4k_exec_command_handlers[] = {
{
.name = "cp0",
.usage = "regnum [value]",
.help = "display/modify cp0 register",
},
+ {
+ .name = "smp_off",
+ .handler = mips_m4k_handle_smp_off_command,
+ .mode = COMMAND_EXEC,
+ .help = "Stop smp handling",
+ .usage = "",},
+
+ {
+ .name = "smp_on",
+ .handler = mips_m4k_handle_smp_on_command,
+ .mode = COMMAND_EXEC,
+ .help = "Restart smp handling",
+ .usage = "",
+ },
+ {
+ .name = "smp_gdb",
+ .handler = mips_m4k_handle_smp_gdb_command,
+ .mode = COMMAND_EXEC,
+ .help = "display/fix current core played to gdb",
+ .usage = "",
+ },
+ {
+ .name = "scan_delay",
+ .handler = mips_m4k_handle_scan_delay_command,
+ .mode = COMMAND_ANY,
+ .help = "display/set scan delay in nano seconds",
+ .usage = "[value]",
+ },
COMMAND_REGISTRATION_DONE
};
projects / fw / openocd / blobdiff