target/espressif: add semihosting support

[fw/openocd] / src / target / espressif / esp_xtensa_smp.c

diff --git a/src/target/espressif/esp_xtensa_smp.c b/src/target/espressif/esp_xtensa_smp.c
index b109f3c5e9bad54108d2f7ee8ebd49c748c7d29b..235a86eb9d9019e0223d6826546e208adf4c11c0 100644 (file)
--- a/src/target/espressif/esp_xtensa_smp.c
+++ b/src/target/espressif/esp_xtensa_smp.c
@@ -13,7 +13,9 @@
 #include <target/target.h>
 #include <target/target_type.h>
 #include <target/smp.h>
+#include <target/semihosting_common.h>
 #include "esp_xtensa_smp.h"
+#include "esp_xtensa_semihosting.h"
 
 /*
 Multiprocessor stuff common:
@@ -128,6 +130,7 @@ int esp_xtensa_smp_poll(struct target *target)
 {
        enum target_state old_state = target->state;
        struct esp_xtensa_smp_common *esp_xtensa_smp = target_to_esp_xtensa_smp(target);
+       struct esp_xtensa_common *esp_xtensa = target_to_esp_xtensa(target);
        struct target_list *head;
        struct target *curr;
        bool other_core_resume_req = false;
@@ -180,6 +183,19 @@ int esp_xtensa_smp_poll(struct target *target)
                if (old_state == TARGET_DEBUG_RUNNING) {
                        target_call_event_callbacks(target, TARGET_EVENT_DEBUG_HALTED);
                } else {
+                       if (esp_xtensa_semihosting(target, &ret) == SEMIHOSTING_HANDLED) {
+                               if (ret == ERROR_OK && esp_xtensa->semihost.need_resume &&
+                                       !esp_xtensa_smp->other_core_does_resume) {
+                                       esp_xtensa->semihost.need_resume = false;
+                                       /* Resume xtensa_resume will handle BREAK instruction. */
+                                       ret = target_resume(target, 1, 0, 1, 0);
+                                       if (ret != ERROR_OK) {
+                                               LOG_ERROR("Failed to resume target");
+                                               return ret;
+                                       }
+                               }
+                               return ret;
+                       }
                        /* check whether any core polled by esp_xtensa_smp_update_halt_gdb() requested resume */
                        if (target->smp && other_core_resume_req) {
                                /* Resume xtensa_resume will handle BREAK instruction. */
@@ -253,6 +269,11 @@ static int esp_xtensa_smp_update_halt_gdb(struct target *target, bool *need_resu
                if (ret != ERROR_OK)
                        return ret;
                esp_xtensa_smp->other_core_does_resume = false;
+               struct esp_xtensa_common *curr_esp_xtensa = target_to_esp_xtensa(curr);
+               if (curr_esp_xtensa->semihost.need_resume) {
+                       curr_esp_xtensa->semihost.need_resume = false;
+                       *need_resume = true;
+               }
        }
 
        /* after all targets were updated, poll the gdb serving target */
@@ -451,9 +472,10 @@ int esp_xtensa_smp_watchpoint_remove(struct target *target, struct watchpoint *w
 int esp_xtensa_smp_init_arch_info(struct target *target,
        struct esp_xtensa_smp_common *esp_xtensa_smp,
        struct xtensa_debug_module_config *dm_cfg,
-       const struct esp_xtensa_smp_chip_ops *chip_ops)
+       const struct esp_xtensa_smp_chip_ops *chip_ops,
+       const struct esp_semihost_ops *semihost_ops)
 {
-       int ret = esp_xtensa_init_arch_info(target, &esp_xtensa_smp->esp_xtensa, dm_cfg);
+       int ret = esp_xtensa_init_arch_info(target, &esp_xtensa_smp->esp_xtensa, dm_cfg, semihost_ops);
        if (ret != ERROR_OK)
                return ret;
        esp_xtensa_smp->chip_ops = chip_ops;
@@ -463,7 +485,24 @@ int esp_xtensa_smp_init_arch_info(struct target *target,
 
 int esp_xtensa_smp_target_init(struct command_context *cmd_ctx, struct target *target)
 {
-       return esp_xtensa_target_init(cmd_ctx, target);
+       int ret = esp_xtensa_target_init(cmd_ctx, target);
+       if (ret != ERROR_OK)
+               return ret;
+
+       if (target->smp) {
+               struct target_list *head;
+               foreach_smp_target(head, target->smp_targets) {
+                       struct target *curr = head->target;
+                       ret = esp_xtensa_semihosting_init(curr);
+                       if (ret != ERROR_OK)
+                               return ret;
+               }
+       } else {
+               ret = esp_xtensa_semihosting_init(target);
+               if (ret != ERROR_OK)
+                       return ret;
+       }
+       return ERROR_OK;
 }
 
 COMMAND_HANDLER(esp_xtensa_smp_cmd_xtdef)