Watchdog fixes

1) When frequency changes, reload the watchdog timer right away, or it
may expire before the next reload.  (Only matters when re-enabling the
PLL.)

2) Split out the timer/task debug output used by the watchdog into
their own routines, instead of assuming it's safe to call the command
handlers.  Also make the flushes in those print routines safe to call
from interrupt level.

Signed-off-by: Randall Spangler <rspangler@chromium.org>

BUG=none
TEST=waitms 1500; should print task dump again

Change-Id: I07e0ed24a526ae499566dab0bbeb0f5755cd5be6

1 files changed, 9 insertions, 0 deletions

diff --git a/include/task.h b/include/task.h
index 79289b1c08..660195460e 100644
--- a/include/task.h
+++ b/include/task.h
@@ -55,6 +55,11 @@ static inline void task_wake(task_id_t tskid)
  * When called in interrupt context, returns TASK_ID_INVALID. */
 task_id_t task_get_current(void);
 
+/* Convert an address to the corresponding task ID.  The address may be a stack
+ * pointer or the task data for a task.  Returns TASK_ID_INVALID if the address
+ * does not correspond to a task. */
+task_id_t task_from_addr(uint32_t addr);
+
 /* Return a pointer to the bitmap of events of the task. */
 uint32_t *task_get_event_bitmap(task_id_t tsk);
 
@@ -70,6 +75,10 @@ uint32_t *task_get_event_bitmap(task_id_t tsk);
  * Returns the bitmap of received events (and clears it atomically). */
 uint32_t task_wait_event(int timeout_us);
 
+/* Prints the list of tasks using the command output channel.  This may be
+ * called from interrupt level. */
+void task_print_list(void);
+
 #ifdef CONFIG_TASK_PROFILING
 /* Start tracking an interrupt.
  *