target: groundwork for "reset-assert" event

This defines a "reset-assert" event and a supporting utility
routine, and documents both how targets should implement it
and how config scripts should use it.  Core-specific updates
are needed to make this work.

Signed-off-by: David Brownell <dbrownell@users.sourceforge.net>

2 files changed, 21 insertions, 3 deletions

diff --git a/src/target/target.c b/src/target/target.c
index 3de9f2c6..a2bd8868 100644
--- a/src/target/target.c
+++ b/src/target/target.c
@@ -147,6 +147,7 @@ static const Jim_Nvp nvp_target_event[] = {
 	{ .value = TARGET_EVENT_RESET_START, .name = "reset-start" },
 
 	{ .value = TARGET_EVENT_RESET_ASSERT_PRE,    .name = "reset-assert-pre" },
+	{ .value = TARGET_EVENT_RESET_ASSERT,        .name = "reset-assert" },
 	{ .value = TARGET_EVENT_RESET_ASSERT_POST,   .name = "reset-assert-post" },
 	{ .value = TARGET_EVENT_RESET_DEASSERT_PRE,  .name = "reset-deassert-pre" },
 	{ .value = TARGET_EVENT_RESET_DEASSERT_POST, .name = "reset-deassert-post" },
@@ -154,8 +155,8 @@ static const Jim_Nvp nvp_target_event[] = {
 	{ .value = TARGET_EVENT_RESET_HALT_POST,     .name = "reset-halt-post" },
 	{ .value = TARGET_EVENT_RESET_WAIT_PRE,      .name = "reset-wait-pre" },
 	{ .value = TARGET_EVENT_RESET_WAIT_POST,     .name = "reset-wait-post" },
-	{ .value = TARGET_EVENT_RESET_INIT , .name = "reset-init" },
-	{ .value = TARGET_EVENT_RESET_END, .name = "reset-end" },
+	{ .value = TARGET_EVENT_RESET_INIT,          .name = "reset-init" },
+	{ .value = TARGET_EVENT_RESET_END,           .name = "reset-end" },
 
 	{ .value = TARGET_EVENT_EXAMINE_START, .name = "examine-start" },
 	{ .value = TARGET_EVENT_EXAMINE_END, .name = "examine-end" },
@@ -3523,6 +3524,20 @@ void target_handle_event(struct target *target, enum target_event e)
 	}
 }
 
+/**
+ * Returns true only if the target has a handler for the specified event.
+ */
+bool target_has_event_action(struct target *target, enum target_event event)
+{
+	struct target_event_action *teap;
+
+	for (teap = target->event_action; teap != NULL; teap = teap->next) {
+		if (teap->event == event)
+			return true;
+	}
+	return false;
+}
+
 enum target_cfg_param {
 	TCFG_TYPE,
 	TCFG_EVENT,
diff --git a/src/target/target.h b/src/target/target.h
index 15003c65..55e9088a 100644
--- a/src/target/target.h
+++ b/src/target/target.h
@@ -196,6 +196,7 @@ enum target_event
 
 	TARGET_EVENT_RESET_START,
 	TARGET_EVENT_RESET_ASSERT_PRE,
+	TARGET_EVENT_RESET_ASSERT,	/* C code uses this instead of SRST */
 	TARGET_EVENT_RESET_ASSERT_POST,
 	TARGET_EVENT_RESET_DEASSERT_PRE,
 	TARGET_EVENT_RESET_DEASSERT_POST,
@@ -226,7 +227,9 @@ struct target_event_action {
 	struct Jim_Obj *body;
 	int has_percent;
 	struct target_event_action *next;
- };
+};
+
+bool target_has_event_action(struct target *target, enum target_event event);
 
 struct target_event_callback
 {