#include "armv8_cache.h"
#include <helper/time_support.h>
+#define __unused __attribute((unused))
+
+enum restart_mode {
+ RESTART_LAZY,
+ RESTART_SYNC,
+};
+
+enum halt_mode {
+ HALT_LAZY,
+ HALT_SYNC,
+};
+
static int aarch64_poll(struct target *target);
static int aarch64_debug_entry(struct target *target);
static int aarch64_restore_context(struct target *target, bool bpwp);
static int aarch64_read_apb_ap_memory(struct target *target,
uint64_t address, uint32_t size, uint32_t count, uint8_t *buffer);
+#define foreach_smp_target(pos, head) \
+ for (pos = head; (pos != NULL); pos = pos->next)
+
static int aarch64_restore_system_control_reg(struct target *target)
{
enum arm_mode target_mode = ARM_MODE_ANY;
*/
/* Enable CTI */
- retval = mem_ap_write_atomic_u32(armv8->debug_ap,
- armv8->cti_base + CTI_CTR, 1);
- /* By default, gate all channel triggers to and from the CTM */
+ retval = arm_cti_enable(armv8->cti, true);
+ /* By default, gate all channel events to and from the CTM */
if (retval == ERROR_OK)
- retval = mem_ap_write_atomic_u32(armv8->debug_ap,
- armv8->cti_base + CTI_GATE, 0);
- /* output halt requests to PE on channel 0 trigger */
+ retval = arm_cti_write_reg(armv8->cti, CTI_GATE, 0);
+ /* output halt requests to PE on channel 0 event */
if (retval == ERROR_OK)
- retval = mem_ap_write_atomic_u32(armv8->debug_ap,
- armv8->cti_base + CTI_OUTEN0, CTI_CHNL(0));
- /* output restart requests to PE on channel 1 trigger */
+ retval = arm_cti_write_reg(armv8->cti, CTI_OUTEN0, CTI_CHNL(0));
+ /* output restart requests to PE on channel 1 event */
if (retval == ERROR_OK)
- retval = mem_ap_write_atomic_u32(armv8->debug_ap,
- armv8->cti_base + CTI_OUTEN1, CTI_CHNL(1));
+ retval = arm_cti_write_reg(armv8->cti, CTI_OUTEN1, CTI_CHNL(1));
if (retval != ERROR_OK)
return retval;
/* Resync breakpoint registers */
- /* Since this is likely called from init or reset, update target state information*/
- return aarch64_poll(target);
+ return ERROR_OK;
}
/* Write to memory mapped registers directly with no cache or mmu handling */
return armv8_set_dbgreg_bits(armv8, CPUV8_DBG_DSCR, bit_mask, value);
}
-static struct target *get_aarch64(struct target *target, int32_t coreid)
+static int aarch64_check_state_one(struct target *target,
+ uint32_t mask, uint32_t val, int *p_result, uint32_t *p_prsr)
{
- struct target_list *head;
- struct target *curr;
+ struct armv8_common *armv8 = target_to_armv8(target);
+ uint32_t prsr;
+ int retval;
- 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;
+ retval = mem_ap_read_atomic_u32(armv8->debug_ap,
+ armv8->debug_base + CPUV8_DBG_PRSR, &prsr);
+ if (retval != ERROR_OK)
+ return retval;
+
+ if (p_prsr)
+ *p_prsr = prsr;
+
+ if (p_result)
+ *p_result = (prsr & mask) == (val & mask);
+
+ return ERROR_OK;
+}
+
+static int aarch64_wait_halt_one(struct target *target)
+{
+ int retval = ERROR_OK;
+ uint32_t prsr;
+
+ int64_t then = timeval_ms();
+ for (;;) {
+ int halted;
+
+ retval = aarch64_check_state_one(target, PRSR_HALT, PRSR_HALT, &halted, &prsr);
+ if (retval != ERROR_OK || halted)
+ break;
+
+ if (timeval_ms() > then + 1000) {
+ retval = ERROR_TARGET_TIMEOUT;
+ LOG_DEBUG("target %s timeout, prsr=0x%08"PRIx32, target_name(target), prsr);
+ break;
+ }
}
- return target;
+ return retval;
}
-static int aarch64_halt(struct target *target);
-static int aarch64_halt_smp(struct target *target)
+static int aarch64_prepare_halt_smp(struct target *target, bool exc_target, struct target **p_first)
{
int retval = ERROR_OK;
struct target_list *head = target->head;
+ struct target *first = NULL;
+
+ LOG_DEBUG("target %s exc %i", target_name(target), exc_target);
- while (head != (struct target_list *)NULL) {
+ while (head != NULL) {
struct target *curr = head->target;
struct armv8_common *armv8 = target_to_armv8(curr);
+ head = head->next;
+
+ if (exc_target && curr == target)
+ continue;
+ if (!target_was_examined(curr))
+ continue;
+ if (curr->state != TARGET_RUNNING)
+ continue;
+
+ /* HACK: mark this target as prepared for halting */
+ curr->debug_reason = DBG_REASON_DBGRQ;
/* open the gate for channel 0 to let HALT requests pass to the CTM */
- if (curr->smp) {
- retval = mem_ap_write_atomic_u32(armv8->debug_ap,
- armv8->cti_base + CTI_GATE, CTI_CHNL(0));
- if (retval == ERROR_OK)
- retval = aarch64_set_dscr_bits(curr, DSCR_HDE, DSCR_HDE);
- }
+ retval = arm_cti_ungate_channel(armv8->cti, 0);
+ if (retval == ERROR_OK)
+ retval = aarch64_set_dscr_bits(curr, DSCR_HDE, DSCR_HDE);
if (retval != ERROR_OK)
break;
- head = head->next;
+ LOG_DEBUG("target %s prepared", target_name(curr));
+
+ if (first == NULL)
+ first = curr;
}
+ if (p_first) {
+ if (exc_target && first)
+ *p_first = first;
+ else
+ *p_first = target;
+ }
+
+ return retval;
+}
+
+static int aarch64_halt_one(struct target *target, enum halt_mode mode)
+{
+ int retval = ERROR_OK;
+ struct armv8_common *armv8 = target_to_armv8(target);
+
+ LOG_DEBUG("%s", target_name(target));
+
+ /* allow Halting Debug Mode */
+ retval = aarch64_set_dscr_bits(target, DSCR_HDE, DSCR_HDE);
+ if (retval != ERROR_OK)
+ return retval;
+
+ /* trigger an event on channel 0, this outputs a halt request to the PE */
+ retval = arm_cti_pulse_channel(armv8->cti, 0);
+ if (retval != ERROR_OK)
+ return retval;
+
+ if (mode == HALT_SYNC) {
+ retval = aarch64_wait_halt_one(target);
+ if (retval != ERROR_OK) {
+ if (retval == ERROR_TARGET_TIMEOUT)
+ LOG_ERROR("Timeout waiting for target %s halt", target_name(target));
+ return retval;
+ }
+ }
+
+ return ERROR_OK;
+}
+
+static int aarch64_halt_smp(struct target *target, bool exc_target)
+{
+ struct target *next = target;
+ int retval;
+
+ /* prepare halt on all PEs of the group */
+ retval = aarch64_prepare_halt_smp(target, exc_target, &next);
+
+ if (exc_target && next == target)
+ return retval;
+
/* halt the target PE */
if (retval == ERROR_OK)
- retval = aarch64_halt(target);
+ retval = aarch64_halt_one(next, HALT_LAZY);
+
+ if (retval != ERROR_OK)
+ return retval;
+
+ /* wait for all PEs to halt */
+ int64_t then = timeval_ms();
+ for (;;) {
+ bool all_halted = true;
+ struct target_list *head;
+ struct target *curr;
+
+ foreach_smp_target(head, target->head) {
+ int halted;
+
+ curr = head->target;
+
+ if (!target_was_examined(curr))
+ continue;
+
+ retval = aarch64_check_state_one(curr, PRSR_HALT, PRSR_HALT, &halted, NULL);
+ if (retval != ERROR_OK || !halted) {
+ all_halted = false;
+ break;
+ }
+ }
+
+ if (all_halted)
+ break;
+
+ if (timeval_ms() > then + 1000) {
+ retval = ERROR_TARGET_TIMEOUT;
+ break;
+ }
+
+ /*
+ * HACK: on Hi6220 there are 8 cores organized in 2 clusters
+ * and it looks like the CTI's are not connected by a common
+ * trigger matrix. It seems that we need to halt one core in each
+ * cluster explicitly. So if we find that a core has not halted
+ * yet, we trigger an explicit halt for the second cluster.
+ */
+ retval = aarch64_halt_one(curr, HALT_LAZY);
+ if (retval != ERROR_OK)
+ break;
+ }
return retval;
}
-static int update_halt_gdb(struct target *target)
+static int update_halt_gdb(struct target *target, enum target_debug_reason debug_reason)
{
- int retval = 0;
- if (target->gdb_service && target->gdb_service->core[0] == -1) {
- target->gdb_service->target = target;
- target->gdb_service->core[0] = target->coreid;
- retval += aarch64_halt_smp(target);
+ struct target *gdb_target = NULL;
+ struct target_list *head;
+ struct target *curr;
+
+ if (debug_reason == DBG_REASON_NOTHALTED) {
+ LOG_INFO("Halting remaining targets in SMP group");
+ aarch64_halt_smp(target, true);
}
- return retval;
+
+ /* poll all targets in the group, but skip the target that serves GDB */
+ foreach_smp_target(head, target->head) {
+ curr = head->target;
+ /* skip calling context */
+ if (curr == target)
+ continue;
+ if (!target_was_examined(curr))
+ continue;
+ /* skip targets that were already halted */
+ if (curr->state == TARGET_HALTED)
+ continue;
+ /* remember the gdb_service->target */
+ if (curr->gdb_service != NULL)
+ gdb_target = curr->gdb_service->target;
+ /* skip it */
+ if (curr == gdb_target)
+ continue;
+
+ /* avoid recursion in aarch64_poll() */
+ curr->smp = 0;
+ aarch64_poll(curr);
+ curr->smp = 1;
+ }
+
+ /* after all targets were updated, poll the gdb serving target */
+ if (gdb_target != NULL && gdb_target != target)
+ aarch64_poll(gdb_target);
+
+ return ERROR_OK;
}
/*
- * Cortex-A8 Run control
+ * Aarch64 Run control
*/
static int aarch64_poll(struct target *target)
{
+ enum target_state prev_target_state;
int retval = ERROR_OK;
- uint32_t dscr;
- struct aarch64_common *aarch64 = target_to_aarch64(target);
- struct armv8_common *armv8 = &aarch64->armv8_common;
- 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_aarch64(target, target->gdb_service->core[1]);
- target_call_event_callbacks(target, TARGET_EVENT_HALTED);
- return retval;
- }
- retval = mem_ap_read_atomic_u32(armv8->debug_ap,
- armv8->debug_base + CPUV8_DBG_DSCR, &dscr);
+ int halted;
+
+ retval = aarch64_check_state_one(target,
+ PRSR_HALT, PRSR_HALT, &halted, NULL);
if (retval != ERROR_OK)
return retval;
- if (DSCR_RUN_MODE(dscr) == 0x3) {
+ if (halted) {
+ prev_target_state = target->state;
if (prev_target_state != TARGET_HALTED) {
+ enum target_debug_reason debug_reason = target->debug_reason;
+
/* We have a halting debug event */
- LOG_DEBUG("Target %s halted", target_name(target));
target->state = TARGET_HALTED;
- if ((prev_target_state == TARGET_RUNNING)
- || (prev_target_state == TARGET_UNKNOWN)
- || (prev_target_state == TARGET_RESET)) {
- retval = aarch64_debug_entry(target);
- 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_HALTED);
- }
- if (prev_target_state == TARGET_DEBUG_RUNNING) {
- LOG_DEBUG(" ");
-
- retval = aarch64_debug_entry(target);
- if (retval != ERROR_OK)
- return retval;
- if (target->smp) {
- retval = update_halt_gdb(target);
- if (retval != ERROR_OK)
- return retval;
- }
+ LOG_DEBUG("Target %s halted", target_name(target));
+ retval = aarch64_debug_entry(target);
+ if (retval != ERROR_OK)
+ return retval;
- target_call_event_callbacks(target,
- TARGET_EVENT_DEBUG_HALTED);
+ if (target->smp)
+ update_halt_gdb(target, debug_reason);
+
+ switch (prev_target_state) {
+ case TARGET_RUNNING:
+ case TARGET_UNKNOWN:
+ case TARGET_RESET:
+ target_call_event_callbacks(target, TARGET_EVENT_HALTED);
+ break;
+ case TARGET_DEBUG_RUNNING:
+ target_call_event_callbacks(target, TARGET_EVENT_DEBUG_HALTED);
+ break;
+ default:
+ break;
}
}
} else
static int aarch64_halt(struct target *target)
{
- int retval = ERROR_OK;
- uint32_t dscr;
- struct armv8_common *armv8 = target_to_armv8(target);
-
- /*
- * add HDE in halting debug mode
- */
- retval = aarch64_set_dscr_bits(target, DSCR_HDE, DSCR_HDE);
- if (retval != ERROR_OK)
- return retval;
-
- /* trigger an event on channel 0, this outputs a halt request to the PE */
- retval = mem_ap_write_atomic_u32(armv8->debug_ap,
- armv8->cti_base + CTI_APPPULSE, CTI_CHNL(0));
- if (retval != ERROR_OK)
- return retval;
-
- long long then = timeval_ms();
- for (;; ) {
- retval = mem_ap_read_atomic_u32(armv8->debug_ap,
- armv8->debug_base + CPUV8_DBG_DSCR, &dscr);
- if (retval != ERROR_OK)
- return retval;
- if ((dscr & DSCRV8_HALT_MASK) != 0)
- break;
- if (timeval_ms() > then + 1000) {
- LOG_ERROR("Timeout waiting for halt");
- return ERROR_FAIL;
- }
- }
-
- target->debug_reason = DBG_REASON_DBGRQ;
+ if (target->smp)
+ return aarch64_halt_smp(target, false);
- return ERROR_OK;
+ return aarch64_halt_one(target, HALT_SYNC);
}
-static int aarch64_internal_restore(struct target *target, int current,
+static int aarch64_restore_one(struct target *target, int current,
uint64_t *address, int handle_breakpoints, int debug_execution)
{
struct armv8_common *armv8 = target_to_armv8(target);
int retval;
uint64_t resume_pc;
+ LOG_DEBUG("%s", target_name(target));
+
if (!debug_execution)
target_free_all_working_areas(target);
return retval;
}
-static int aarch64_internal_restart(struct target *target, bool slave_pe)
+/**
+ * prepare single target for restart
+ *
+ *
+ */
+static int aarch64_prepare_restart_one(struct target *target)
{
struct armv8_common *armv8 = target_to_armv8(target);
- struct arm *arm = &armv8->arm;
int retval;
uint32_t dscr;
- /*
- * * Restart core and wait for it to be started. Clear ITRen and sticky
- * * exception flags: see ARMv7 ARM, C5.9.
- *
- * REVISIT: for single stepping, we probably want to
- * disable IRQs by default, with optional override...
- */
+ uint32_t tmp;
+
+ LOG_DEBUG("%s", target_name(target));
retval = mem_ap_read_atomic_u32(armv8->debug_ap,
armv8->debug_base + CPUV8_DBG_DSCR, &dscr);
if ((dscr & DSCR_ERR) != 0)
LOG_ERROR("DSCR.ERR must be cleared before leaving debug!");
- /* make sure to acknowledge the halt event before resuming */
- retval = mem_ap_write_atomic_u32(armv8->debug_ap,
- armv8->cti_base + CTI_INACK, CTI_TRIG(HALT));
-
+ /* acknowledge a pending CTI halt event */
+ retval = arm_cti_ack_events(armv8->cti, CTI_TRIG(HALT));
/*
* open the CTI gate for channel 1 so that the restart events
- * get passed along to all PEs
+ * get passed along to all PEs. Also close gate for channel 0
+ * to isolate the PE from halt events.
*/
if (retval == ERROR_OK)
+ retval = arm_cti_ungate_channel(armv8->cti, 1);
+ if (retval == ERROR_OK)
+ retval = arm_cti_gate_channel(armv8->cti, 0);
+
+ /* make sure that DSCR.HDE is set */
+ if (retval == ERROR_OK) {
+ dscr |= DSCR_HDE;
retval = mem_ap_write_atomic_u32(armv8->debug_ap,
- armv8->cti_base + CTI_GATE, CTI_CHNL(1));
+ armv8->debug_base + CPUV8_DBG_DSCR, dscr);
+ }
+
+ /* clear sticky bits in PRSR, SDR is now 0 */
+ retval = mem_ap_read_atomic_u32(armv8->debug_ap,
+ armv8->debug_base + CPUV8_DBG_PRSR, &tmp);
+
+ return retval;
+}
+
+static int aarch64_do_restart_one(struct target *target, enum restart_mode mode)
+{
+ struct armv8_common *armv8 = target_to_armv8(target);
+ int retval;
+
+ LOG_DEBUG("%s", target_name(target));
+
+ /* trigger an event on channel 1, generates a restart request to the PE */
+ retval = arm_cti_pulse_channel(armv8->cti, 1);
if (retval != ERROR_OK)
return retval;
- if (!slave_pe) {
- /* trigger an event on channel 1, generates a restart request to the PE */
- retval = mem_ap_write_atomic_u32(armv8->debug_ap,
- armv8->cti_base + CTI_APPPULSE, CTI_CHNL(1));
- if (retval != ERROR_OK)
- return retval;
-
- long long then = timeval_ms();
- for (;; ) {
- retval = mem_ap_read_atomic_u32(armv8->debug_ap,
- armv8->debug_base + CPUV8_DBG_DSCR, &dscr);
- if (retval != ERROR_OK)
- return retval;
- if ((dscr & DSCR_HDE) != 0)
+ if (mode == RESTART_SYNC) {
+ int64_t then = timeval_ms();
+ for (;;) {
+ int resumed;
+ /*
+ * if PRSR.SDR is set now, the target did restart, even
+ * if it's now already halted again (e.g. due to breakpoint)
+ */
+ retval = aarch64_check_state_one(target,
+ PRSR_SDR, PRSR_SDR, &resumed, NULL);
+ if (retval != ERROR_OK || resumed)
break;
+
if (timeval_ms() > then + 1000) {
- LOG_ERROR("Timeout waiting for resume");
- return ERROR_FAIL;
+ LOG_ERROR("%s: Timeout waiting for resume"PRIx32, target_name(target));
+ retval = ERROR_TARGET_TIMEOUT;
+ break;
}
}
}
+ if (retval != ERROR_OK)
+ return retval;
+
target->debug_reason = DBG_REASON_NOTHALTED;
target->state = TARGET_RUNNING;
- /* registers are now invalid */
- register_cache_invalidate(arm->core_cache);
- register_cache_invalidate(arm->core_cache->next);
-
return ERROR_OK;
}
-static int aarch64_restore_smp(struct target *target, int handle_breakpoints)
+static int aarch64_restart_one(struct target *target, enum restart_mode mode)
{
- int retval = 0;
+ int retval;
+
+ LOG_DEBUG("%s", target_name(target));
+
+ retval = aarch64_prepare_restart_one(target);
+ if (retval == ERROR_OK)
+ retval = aarch64_do_restart_one(target, mode);
+
+ return retval;
+}
+
+/*
+ * prepare all but the current target for restart
+ */
+static int aarch64_prep_restart_smp(struct target *target, int handle_breakpoints, struct target **p_first)
+{
+ int retval = ERROR_OK;
struct target_list *head;
- struct target *curr;
+ struct target *first = NULL;
uint64_t address;
- head = target->head;
- while (head != (struct target_list *)NULL) {
- curr = head->target;
- if ((curr != target) && (curr->state != TARGET_RUNNING)) {
- /* resume current address , not in step mode */
- retval += aarch64_internal_restore(curr, 1, &address,
- handle_breakpoints, 0);
- retval += aarch64_internal_restart(curr, true);
+
+ foreach_smp_target(head, target->head) {
+ struct target *curr = head->target;
+
+ /* skip calling target */
+ if (curr == target)
+ continue;
+ if (!target_was_examined(curr))
+ continue;
+ if (curr->state != TARGET_HALTED)
+ continue;
+
+ /* resume at current address, not in step mode */
+ retval = aarch64_restore_one(curr, 1, &address, handle_breakpoints, 0);
+ if (retval == ERROR_OK)
+ retval = aarch64_prepare_restart_one(curr);
+ if (retval != ERROR_OK) {
+ LOG_ERROR("failed to restore target %s", target_name(curr));
+ break;
}
- head = head->next;
+ /* remember the first valid target in the group */
+ if (first == NULL)
+ first = curr;
+ }
+
+ if (p_first)
+ *p_first = first;
+
+ return retval;
+}
+
+
+static int aarch64_step_restart_smp(struct target *target)
+{
+ int retval = ERROR_OK;
+ struct target_list *head;
+ struct target *first = NULL;
+
+ LOG_DEBUG("%s", target_name(target));
+
+ retval = aarch64_prep_restart_smp(target, 0, &first);
+ if (retval != ERROR_OK)
+ return retval;
+ if (first != NULL)
+ retval = aarch64_do_restart_one(first, RESTART_LAZY);
+ if (retval != ERROR_OK) {
+ LOG_DEBUG("error restarting target %s", target_name(first));
+ return retval;
}
+
+ int64_t then = timeval_ms();
+ for (;;) {
+ struct target *curr = target;
+ bool all_resumed = true;
+
+ foreach_smp_target(head, target->head) {
+ uint32_t prsr;
+ int resumed;
+
+ curr = head->target;
+
+ if (curr == target)
+ continue;
+
+ retval = aarch64_check_state_one(curr,
+ PRSR_SDR, PRSR_SDR, &resumed, &prsr);
+ if (retval != ERROR_OK || (!resumed && (prsr & PRSR_HALT))) {
+ all_resumed = false;
+ break;
+ }
+
+ if (curr->state != TARGET_RUNNING) {
+ curr->state = TARGET_RUNNING;
+ curr->debug_reason = DBG_REASON_NOTHALTED;
+ target_call_event_callbacks(curr, TARGET_EVENT_RESUMED);
+ }
+ }
+
+ if (all_resumed)
+ break;
+
+ if (timeval_ms() > then + 1000) {
+ LOG_ERROR("%s: timeout waiting for target resume", __func__);
+ retval = ERROR_TARGET_TIMEOUT;
+ break;
+ }
+ /*
+ * HACK: on Hi6220 there are 8 cores organized in 2 clusters
+ * and it looks like the CTI's are not connected by a common
+ * trigger matrix. It seems that we need to halt one core in each
+ * cluster explicitly. So if we find that a core has not halted
+ * yet, we trigger an explicit resume for the second cluster.
+ */
+ retval = aarch64_do_restart_one(curr, RESTART_LAZY);
+ if (retval != ERROR_OK)
+ break;
+}
+
return retval;
}
int retval = 0;
uint64_t addr = address;
- /* 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 0;
- }
-
if (target->state != TARGET_HALTED)
return ERROR_TARGET_NOT_HALTED;
- aarch64_internal_restore(target, current, &addr, handle_breakpoints,
- debug_execution);
+ /*
+ * If this target is part of a SMP group, prepare the others
+ * targets for resuming. This involves restoring the complete
+ * target register context and setting up CTI gates to accept
+ * resume events from the trigger matrix.
+ */
if (target->smp) {
- target->gdb_service->core[0] = -1;
- retval = aarch64_restore_smp(target, handle_breakpoints);
+ retval = aarch64_prep_restart_smp(target, handle_breakpoints, NULL);
if (retval != ERROR_OK)
return retval;
}
- aarch64_internal_restart(target, false);
+
+ /* all targets prepared, restore and restart the current target */
+ retval = aarch64_restore_one(target, current, &addr, handle_breakpoints,
+ debug_execution);
+ if (retval == ERROR_OK)
+ retval = aarch64_restart_one(target, RESTART_SYNC);
+ if (retval != ERROR_OK)
+ return retval;
+
+ if (target->smp) {
+ int64_t then = timeval_ms();
+ for (;;) {
+ struct target *curr = target;
+ struct target_list *head;
+ bool all_resumed = true;
+
+ foreach_smp_target(head, target->head) {
+ uint32_t prsr;
+ int resumed;
+
+ curr = head->target;
+ if (curr == target)
+ continue;
+ if (!target_was_examined(curr))
+ continue;
+
+ retval = aarch64_check_state_one(curr,
+ PRSR_SDR, PRSR_SDR, &resumed, &prsr);
+ if (retval != ERROR_OK || (!resumed && (prsr & PRSR_HALT))) {
+ all_resumed = false;
+ break;
+ }
+
+ if (curr->state != TARGET_RUNNING) {
+ curr->state = TARGET_RUNNING;
+ curr->debug_reason = DBG_REASON_NOTHALTED;
+ target_call_event_callbacks(curr, TARGET_EVENT_RESUMED);
+ }
+ }
+
+ if (all_resumed)
+ break;
+
+ if (timeval_ms() > then + 1000) {
+ LOG_ERROR("%s: timeout waiting for target %s to resume", __func__, target_name(curr));
+ retval = ERROR_TARGET_TIMEOUT;
+ break;
+ }
+
+ /*
+ * HACK: on Hi6220 there are 8 cores organized in 2 clusters
+ * and it looks like the CTI's are not connected by a common
+ * trigger matrix. It seems that we need to halt one core in each
+ * cluster explicitly. So if we find that a core has not halted
+ * yet, we trigger an explicit resume for the second cluster.
+ */
+ retval = aarch64_do_restart_one(curr, RESTART_LAZY);
+ if (retval != ERROR_OK)
+ break;
+ }
+ }
+
+ if (retval != ERROR_OK)
+ return retval;
+
+ target->debug_reason = DBG_REASON_NOTHALTED;
if (!debug_execution) {
target->state = TARGET_RUNNING;
armv8_select_opcodes(armv8, core_state == ARM_STATE_AARCH64);
armv8_select_reg_access(armv8, core_state == ARM_STATE_AARCH64);
+ /* close the CTI gate for all events */
+ if (retval == ERROR_OK)
+ retval = arm_cti_write_reg(armv8->cti, CTI_GATE, 0);
/* discard async exceptions */
if (retval == ERROR_OK)
retval = dpm->instr_cpsr_sync(dpm);
-
if (retval != ERROR_OK)
return retval;
return ERROR_OK;
}
+/*
+ * single-step a target
+ */
static int aarch64_step(struct target *target, int current, target_addr_t address,
int handle_breakpoints)
{
struct armv8_common *armv8 = target_to_armv8(target);
+ int saved_retval = ERROR_OK;
int retval;
uint32_t edecr;
retval = mem_ap_read_atomic_u32(armv8->debug_ap,
armv8->debug_base + CPUV8_DBG_EDECR, &edecr);
- if (retval != ERROR_OK)
- return retval;
-
/* make sure EDECR.SS is not set when restoring the register */
- edecr &= ~0x4;
- /* set EDECR.SS to enter hardware step mode */
- retval = mem_ap_write_atomic_u32(armv8->debug_ap,
- armv8->debug_base + CPUV8_DBG_EDECR, (edecr|0x4));
+ if (retval == ERROR_OK) {
+ edecr &= ~0x4;
+ /* set EDECR.SS to enter hardware step mode */
+ retval = mem_ap_write_atomic_u32(armv8->debug_ap,
+ armv8->debug_base + CPUV8_DBG_EDECR, (edecr|0x4));
+ }
+ /* disable interrupts while stepping */
+ if (retval == ERROR_OK)
+ retval = aarch64_set_dscr_bits(target, 0x3 << 22, 0x3 << 22);
+ /* bail out if stepping setup has failed */
if (retval != ERROR_OK)
return retval;
- /* disable interrupts while stepping */
- retval = aarch64_set_dscr_bits(target, 0x3 << 22, 0x3 << 22);
- if (retval != ERROR_OK)
- return ERROR_OK;
+ if (target->smp && !handle_breakpoints) {
+ /*
+ * isolate current target so that it doesn't get resumed
+ * together with the others
+ */
+ retval = arm_cti_gate_channel(armv8->cti, 1);
+ /* resume all other targets in the group */
+ if (retval == ERROR_OK)
+ retval = aarch64_step_restart_smp(target);
+ if (retval != ERROR_OK) {
+ LOG_ERROR("Failed to restart non-stepping targets in SMP group");
+ return retval;
+ }
+ LOG_DEBUG("Restarted all non-stepping targets in SMP group");
+ }
+
+ /* all other targets running, restore and restart the current target */
+ retval = aarch64_restore_one(target, current, &address, 0, 0);
+ if (retval == ERROR_OK)
+ retval = aarch64_restart_one(target, RESTART_LAZY);
- /* resume the target */
- retval = aarch64_resume(target, current, address, 0, 0);
if (retval != ERROR_OK)
return retval;
- long long then = timeval_ms();
- while (target->state != TARGET_HALTED) {
- retval = aarch64_poll(target);
- if (retval != ERROR_OK)
- return retval;
+ LOG_DEBUG("target step-resumed at 0x%" PRIx64, address);
+ if (!handle_breakpoints)
+ target_call_event_callbacks(target, TARGET_EVENT_RESUMED);
+
+ int64_t then = timeval_ms();
+ for (;;) {
+ int stepped;
+ uint32_t prsr;
+
+ retval = aarch64_check_state_one(target,
+ PRSR_SDR|PRSR_HALT, PRSR_SDR|PRSR_HALT, &stepped, &prsr);
+ if (retval != ERROR_OK || stepped)
+ break;
+
if (timeval_ms() > then + 1000) {
- LOG_ERROR("timeout waiting for target halt");
- return ERROR_FAIL;
+ LOG_ERROR("timeout waiting for target %s halt after step",
+ target_name(target));
+ retval = ERROR_TARGET_TIMEOUT;
+ break;
}
}
+ if (retval == ERROR_TARGET_TIMEOUT)
+ saved_retval = retval;
+
/* restore EDECR */
retval = mem_ap_write_atomic_u32(armv8->debug_ap,
armv8->debug_base + CPUV8_DBG_EDECR, edecr);
if (retval != ERROR_OK)
return ERROR_OK;
- return ERROR_OK;
+ if (saved_retval != ERROR_OK)
+ return saved_retval;
+
+ return aarch64_poll(target);
}
static int aarch64_restore_context(struct target *target, bool bpwp)
{
struct armv8_common *armv8 = target_to_armv8(target);
+ struct arm *arm = &armv8->arm;
+
+ int retval;
LOG_DEBUG("%s", target_name(target));
if (armv8->pre_restore_context)
armv8->pre_restore_context(target);
- return armv8_dpm_write_dirty_registers(&armv8->dpm, bpwp);
+ retval = armv8_dpm_write_dirty_registers(&armv8->dpm, bpwp);
+ if (retval == ERROR_OK) {
+ /* registers are now invalid */
+ register_cache_invalidate(arm->core_cache);
+ register_cache_invalidate(arm->core_cache->next);
+ }
+
+ return retval;
}
/*
struct aarch64_common *aarch64 = target_to_aarch64(target);
struct armv8_common *armv8 = &aarch64->armv8_common;
struct adiv5_dap *swjdp = armv8->arm.dap;
+ uint32_t cti_base;
int i;
int retval = ERROR_OK;
uint64_t debug, ttypr;
uint32_t tmp0, tmp1;
debug = ttypr = cpuid = 0;
- /* We do one extra read to ensure DAP is configured,
- * we call ahbap_debugport_init(swjdp) instead
- */
retval = dap_dp_init(swjdp);
if (retval != ERROR_OK)
return retval;
return retval;
}
- armv8->debug_ap->memaccess_tck = 80;
+ armv8->debug_ap->memaccess_tck = 10;
if (!target->dbgbase_set) {
uint32_t dbgbase;
} else
armv8->debug_base = target->dbgbase;
- retval = mem_ap_write_atomic_u32(armv8->debug_ap,
- armv8->debug_base + CPUV8_DBG_LOCKACCESS, 0xC5ACCE55);
+ uint32_t prsr;
+ int64_t then = timeval_ms();
+ do {
+ retval = mem_ap_read_atomic_u32(armv8->debug_ap,
+ armv8->debug_base + CPUV8_DBG_PRSR, &prsr);
+ if (retval == ERROR_OK) {
+ retval = mem_ap_write_atomic_u32(armv8->debug_ap,
+ armv8->debug_base + CPUV8_DBG_PRCR, PRCR_COREPURQ|PRCR_CORENPDRQ);
+ if (retval != ERROR_OK) {
+ LOG_DEBUG("write to PRCR failed");
+ break;
+ }
+ }
+
+ if (timeval_ms() > then + 1000) {
+ retval = ERROR_TARGET_TIMEOUT;
+ break;
+ }
+
+ } while ((prsr & PRSR_PU) == 0);
+
if (retval != ERROR_OK) {
- LOG_DEBUG("LOCK debug access fail");
+ LOG_ERROR("target %s: failed to set power state of the core.", target_name(target));
return retval;
}
if (target->ctibase == 0) {
/* assume a v8 rom table layout */
- armv8->cti_base = target->ctibase = armv8->debug_base + 0x10000;
- LOG_INFO("Target ctibase is not set, assuming 0x%0" PRIx32, target->ctibase);
+ cti_base = armv8->debug_base + 0x10000;
+ LOG_INFO("Target ctibase is not set, assuming 0x%0" PRIx32, cti_base);
} else
- armv8->cti_base = target->ctibase;
+ cti_base = target->ctibase;
+
+ armv8->cti = arm_cti_create(armv8->debug_ap, cti_base);
+ if (armv8->cti == NULL)
+ return ERROR_FAIL;
- armv8->arm.core_type = ARM_MODE_MON;
retval = aarch64_dpm_setup(aarch64, debug);
if (retval != ERROR_OK)
return retval;
LOG_DEBUG("Configured %i hw breakpoints", aarch64->brp_num);
+ target->state = TARGET_RUNNING;
+ target->debug_reason = DBG_REASON_NOTHALTED;
+
target_set_examined(target);
return ERROR_OK;
}
struct aarch64_common *aarch64, struct jtag_tap *tap)
{
struct armv8_common *armv8 = &aarch64->armv8_common;
- struct adiv5_dap *dap = armv8->arm.dap;
-
- armv8->arm.dap = dap;
/* Setup struct aarch64_common */
aarch64->common_magic = AARCH64_COMMON_MAGIC;
/* tap has no dap initialized */
if (!tap->dap) {
tap->dap = dap_init();
-
- /* Leave (only) generic DAP stuff for debugport_init() */
tap->dap->tap = tap;
}
-
armv8->arm.dap = tap->dap;
/* register arch-specific functions */
armv8->examine_debug_reason = NULL;
-
armv8->post_debug_entry = aarch64_post_debug_entry;
-
armv8->pre_restore_context = NULL;
-
armv8->armv8_mmu.read_physical_memory = aarch64_read_phys_memory;
- /* REVISIT v7a setup should be in a v7a-specific routine */
armv8_init_arch_info(target, armv8);
target_register_timer_callback(aarch64_handle_target_request, 1, 1, target);
static int aarch64_mmu(struct target *target, int *enabled)
{
if (target->state != TARGET_HALTED) {
- LOG_ERROR("%s: target not halted", __func__);
+ LOG_ERROR("%s: target %s not halted", __func__, target_name(target));
return ERROR_TARGET_INVALID;
}
return ERROR_OK;
}
-COMMAND_HANDLER(aarch64_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 %" PRId32 " -> %" PRId32, target->gdb_service->core[0]
- , target->gdb_service->core[1]);
- }
- return ERROR_OK;
-}
-
static const struct command_registration aarch64_exec_command_handlers[] = {
{
.name = "cache_info",
.help = "Restart smp handling",
.usage = "",
},
- {
- .name = "smp_gdb",
- .handler = aarch64_handle_smp_gdb_command,
- .mode = COMMAND_EXEC,
- .help = "display/fix current core played to gdb",
- .usage = "",
- },
-
COMMAND_REGISTRATION_DONE
};
projects / openocd / commitdiff