baytrail: Move MRC cache code to a common directory

This common code can be shared across Intel SOCs.

Change-Id: Id9ec4ccd3fc81cbab19a7d7e13bfa3975d9802d0
Signed-off-by: Duncan Laurie <dlaurie@chromium.org>
Reviewed-on: https://chromium-review.googlesource.com/196263
Reviewed-by: Aaron Durbin <adurbin@chromium.org>
(cherry picked from commit f9919e2551b02056b83918d2e7b515b25541c583)
Signed-off-by: Isaac Christensen <isaac.christensen@se-eng.com>
Reviewed-on: http://review.coreboot.org/6967
Tested-by: build bot (Jenkins)
Reviewed-by: Marc Jones <marc.jones@se-eng.com>

1 files changed, 41 insertions, 0 deletions

diff --git a/src/soc/intel/common/mrc_cache.h b/src/soc/intel/common/mrc_cache.h
new file mode 100644
index 0000000000..14767e52b3
--- /dev/null
+++ b/src/soc/intel/common/mrc_cache.h
@@ -0,0 +1,41 @@
+/*
+ * This file is part of the coreboot project.
+ *
+ * Copyright (C) 2014 Google 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.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#ifndef _COMMON_MRC_CACHE_H_
+#define _COMMON_MRC_CACHE_H_
+
+#include <stddef.h>
+#include <stdint.h>
+
+/* Wrapper object to save MRC information. */
+struct mrc_saved_data {
+	uint32_t signature;
+	uint32_t size;
+	uint32_t checksum;
+	uint32_t reserved;
+	uint8_t  data[0];
+} __attribute__((packed));
+
+/* Locate the most recently saved MRC data. */
+int mrc_cache_get_current(const struct mrc_saved_data **cache);
+
+/* Stash the resulting MRC data to be saved in non-volatile storage later. */
+int mrc_cache_stash_data(void *data, size_t size);
+
+#endif /* _COMMON_MRC_CACHE_H_ */