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-rw-r--r--src/target/arm11.c6
-rw-r--r--src/target/cortex_a8.c6
-rw-r--r--src/target/target.c19
-rw-r--r--src/target/target.h32
-rw-r--r--src/target/target_type.h34
5 files changed, 53 insertions, 44 deletions
diff --git a/src/target/arm11.c b/src/target/arm11.c
index 7a30bc7f..a88d597d 100644
--- a/src/target/arm11.c
+++ b/src/target/arm11.c
@@ -1906,12 +1906,6 @@ static int arm11_examine(struct target *target)
retval = etm_setup(target);
}
- /* FIXME this sets a flag in the (shared) arm11_target structure,
- * not in the (per-cpu) "target" structure ... so it's clearly
- * wrong in the case of e.g. two different ARM11 chips on the
- * same board. (Maybe ARM11 MPCore works though.) Whoever calls
- * the examine() method should set a target-specific flag...
- */
target_set_examined(target);
return ERROR_OK;
diff --git a/src/target/cortex_a8.c b/src/target/cortex_a8.c
index 730cd33e..da5e84be 100644
--- a/src/target/cortex_a8.c
+++ b/src/target/cortex_a8.c
@@ -1297,11 +1297,11 @@ static int cortex_a8_dcc_read(struct swjdp_common *swjdp, uint8_t *value, uint8_
static int cortex_a8_handle_target_request(void *priv)
{
struct target *target = priv;
- if (!target->type->examined)
- return ERROR_OK;
struct armv7a_common *armv7a = target_to_armv7a(target);
struct swjdp_common *swjdp = &armv7a->swjdp_info;
+ if (!target_was_examined(target))
+ return ERROR_OK;
if (!target->dbg_msg_enabled)
return ERROR_OK;
@@ -1424,7 +1424,7 @@ static int cortex_a8_examine(struct target *target)
/* Configure core debug access */
cortex_a8_init_debug_access(target);
- target->type->examined = 1;
+ target_set_examined(target);
return retval;
}
diff --git a/src/target/target.c b/src/target/target.c
index 2385d0f6..f7e2ad64 100644
--- a/src/target/target.c
+++ b/src/target/target.c
@@ -644,20 +644,13 @@ int target_run_algorithm(struct target *target,
entry_point, exit_point, timeout_ms, arch_info);
}
-/// @returns @c true if the target has been examined.
-bool target_was_examined(struct target *target)
-{
- return target->type->examined;
-}
-/// Sets the @c examined flag for the given target.
-void target_set_examined(struct target *target)
-{
- target->type->examined = true;
-}
-// Reset the @c examined flag for the given target.
-void target_reset_examined(struct target *target)
+/**
+ * Reset the @c examined flag for the given target.
+ * Pure paranoia -- targets are zeroed on allocation.
+ */
+static void target_reset_examined(struct target *target)
{
- target->type->examined = false;
+ target->examined = false;
}
diff --git a/src/target/target.h b/src/target/target.h
index 914d62fd..e4de2c7c 100644
--- a/src/target/target.h
+++ b/src/target/target.h
@@ -129,7 +129,16 @@ struct target
const char *cmd_name; /* tcl Name of target */
int target_number; /* DO NOT USE! field to be removed in 2010 */
struct jtag_tap *tap; /* where on the jtag chain is this */
- const char *variant; /* what varient of this chip is it? */
+ const char *variant; /* what variant of this chip is it? */
+
+ /**
+ * Indicates whether this target has been examined.
+ *
+ * Do @b not access this field directly, use target_was_examined()
+ * or target_set_examined().
+ */
+ bool examined;
+
struct target_event_action *event_action;
int reset_halt; /* attempt resetting the CPU into the halted mode? */
@@ -289,18 +298,25 @@ struct target *get_target(const char *id);
const char *target_get_name(struct target *target);
/**
- * Examine the specified @a target.
+ * Examine the specified @a target, letting it perform any
+ * initialization that requires JTAG access.
*
* This routine is a wrapper for target->type->examine.
*/
int target_examine_one(struct target *target);
-/// @returns @c true if the target has been examined.
-bool target_was_examined(struct target *target);
-/// Sets the @c examined flag for the given target.
-void target_set_examined(struct target *target);
-/// Reset the @c examined flag for the given target.
-void target_reset_examined(struct target *target);
+/// @returns @c true if target_set_examined() has been called.
+static inline bool target_was_examined(struct target *target)
+{
+ return target->examined;
+}
+
+/// Sets the @c examined flag for the given target.
+/// Use in target->type->examine() after one-time setup is done.
+static inline void target_set_examined(struct target *target)
+{
+ target->examined = true;
+}
/**
* Add the @a breakpoint for @a target.
diff --git a/src/target/target_type.h b/src/target/target_type.h
index f601b191..aa87a744 100644
--- a/src/target/target_type.h
+++ b/src/target/target_type.h
@@ -30,22 +30,19 @@
struct target;
+/**
+ * This holds methods shared between all instances of a given target
+ * type. For example, all Cortex-M3 targets on a scan chain share
+ * the same method table.
+ */
struct target_type
{
/**
- * Name of the target. Do @b not access this field directly, use
- * target_get_name() instead.
+ * Name of this type of target. Do @b not access this
+ * field directly, use target_get_name() instead.
*/
char *name;
- /**
- * Indicates whether this target has been examined.
- *
- * Do @b not access this field directly, use target_was_examined()
- * target_set_examined(), and target_reset_examined().
- */
- int examined;
-
/* poll current target status */
int (*poll)(struct target *target);
/* Invoked only from target_arch_state().
@@ -165,13 +162,22 @@ struct target_type
/* returns JIM_OK, or JIM_ERR, or JIM_CONTINUE - if option not understood */
int (*target_jim_commands)(struct target *target, Jim_GetOptInfo *goi);
- /* invoked after JTAG chain has been examined & validated. During
- * this stage the target is examined and any additional setup is
- * performed.
+ /**
+ * This method is used to perform target setup that requires
+ * JTAG access.
+ *
+ * This may be called multiple times. It is called after the
+ * scan chain is initially validated, or later after the target
+ * is enabled by a JRC. It may also be called during some
+ * parts of the reset sequence.
*
- * invoked every time after the jtag chain has been validated/examined
+ * For one-time initialization tasks, use target_was_examined()
+ * and target_set_examined(). For example, probe the hardware
+ * before setting up chip-specific state, and then set that
+ * flag so you don't do that again.
*/
int (*examine)(struct target *target);
+
/* Set up structures for target.
*
* It is illegal to talk to the target at this stage as this fn is invoked