mainboard/lippert: Refactor SEMA watchdog message

It's too critical to ignore when sending the message on
SMBus fails, so allow for a fair amount of retries.
Failure here causes watchdog to do hard reset later.

Move it out of mainboard.c as we need to call this
early in romstage while we are debugging.

Change-Id: I1006b079269d6dd44de630db7a5694124af2f974
Signed-off-by: Kyösti Mälkki <kyosti.malkki@gmail.com>
Reviewed-on: https://review.coreboot.org/21316
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Aaron Durbin <adurbin@chromium.org>

1 files changed, 23 insertions, 0 deletions

diff --git a/src/mainboard/lippert/frontrunner-af/sema.h b/src/mainboard/lippert/frontrunner-af/sema.h
new file mode 100644
index 0000000000..ea8ee31e4e
--- /dev/null
+++ b/src/mainboard/lippert/frontrunner-af/sema.h
@@ -0,0 +1,23 @@
+/*
+ * This file is part of the coreboot project.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; version 2 of the License.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ */
+
+#ifndef __LIPPERT_SEMA_H__
+#define __LIPPERT_SEMA_H__
+
+/* Signal SEMA watchdog a successful boot.
+ * Returns < 0 is SMBus message failed after
+ * several retries.
+ */
+int sema_send_alive(void);
+
+#endif