src/soc/intel/common/mrc_cache.h

   1 /*
   2  * This file is part of the coreboot project.
   3  *
   4  * Copyright (C) 2014 Google Inc.
   5  *
   6  * This program is free software; you can redistribute it and/or modify
   7  * it under the terms of the GNU General Public License as published by
   8  * the Free Software Foundation; version 2 of the License.
   9  *
  10  * This program is distributed in the hope that it will be useful,
  11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13  * GNU General Public License for more details.
  14  */
  15
  16 #ifndef _COMMON_MRC_CACHE_H_
  17 #define _COMMON_MRC_CACHE_H_
  18
  19 #include <stddef.h>
  20 #include <stdint.h>
  21
  22 /* Wrapper object to save MRC information. */
  23 struct mrc_saved_data {
  24         uint32_t signature;
  25         uint32_t size;
  26         uint32_t checksum;
  27         uint32_t reserved;
  28         uint8_t  data[0];
  29 } __attribute__((packed));
  30
  31 /* Locate the most recently saved MRC data. */
  32 int mrc_cache_get_current(const struct mrc_saved_data **cache);
  33
  34 /* Stash the resulting MRC data to be saved in non-volatile storage later. */
  35 int mrc_cache_stash_data(void *data, size_t size);
  36
  37 #endif /* _COMMON_MRC_CACHE_H_ */