Add a common watchdog file

Some things about watchdogs are common across Cortex-M3, so create a
common watchdog file to hold these. Put the watchdog task in there as
the first customer.

BUG=chrome-os-partner:10145
TEST=build for all boards

Change-Id: Id55f71a807ee12bae3758afc213c30c731eadc07
Signed-off-by: Simon Glass <sjg@chromium.org>
Reviewed-on: https://gerrit.chromium.org/gerrit/24395
Reviewed-by: Randall Spangler <rspangler@chromium.org>

1 files changed, 19 insertions, 0 deletions

diff --git a/core/cortex-m/watchdog.c b/core/cortex-m/watchdog.c
new file mode 100644
index 0000000000..e0a58953fb
--- /dev/null
+++ b/core/cortex-m/watchdog.c
@@ -0,0 +1,19 @@
+/* Copyright (c) 2012 The Chromium OS Authors. All rights reserved.
+ * Use of this source code is governed by a BSD-style license that can be
+ * found in the LICENSE file.
+ */
+
+/* Watchdog common code */
+
+#include "timer.h"
+#include "watchdog.h"
+
+
+/* Low priority task to reload the watchdog */
+void watchdog_task(void)
+{
+	while (1) {
+		usleep(WATCHDOG_RELOAD_MS * 1000);
+		watchdog_reload();
+	}
+}