soc/amd/stoneyridge: Create a HALT_THIS_AP callout

It was required for all cores use the same CAR teardown function
(exit_car.S and gcccar.inc). AGESA has already been modified to do the
AP to do the call out. Create assembly code to call chipset_teardown_car
and then enter an endless loop with halt instruction. Then create the
call out that will call this new assembly code.

BUG=b:70338633
AGESA COMMIT=3313d277
TEST=Created a debug version of AGESA that would print the returned
status of HALT_THIS_AP. Build code without the fix, see the return.
Build code with the fix, see that there's no return.

Change-Id: I05ee405812211d93dfdbdc5ee7d9978c2eb585e1
Signed-off-by: Richard Spiegel <richard.spiegel@silverbackltd.com>
Reviewed-on: https://review.coreboot.org/24999
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Martin Roth <martinroth@google.com>

1 files changed, 23 insertions, 0 deletions

diff --git a/src/soc/amd/common/block/include/amdblocks/car.h b/src/soc/amd/common/block/include/amdblocks/car.h
new file mode 100644
index 0000000000..6c4049b6bf
--- /dev/null
+++ b/src/soc/amd/common/block/include/amdblocks/car.h
@@ -0,0 +1,23 @@
+/*
+ * This file is part of the coreboot project.
+ *
+ * Copyright (C) 2018 Advanced Micro Devices, Inc.
+ *
+ * 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 __AMD_CAR_H__
+#define __AMD_CAR_H__
+
+#include <stdint.h>
+
+void ap_teardown_car(uint32_t flags);
+
+#endif /* __AMD_CAR_H__ */