src/drivers/intel/fsp1_1/include/fsp/memmap.h

   1 /*
   2  * This file is part of the coreboot project.
   3  *
   4  * Copyright (C) 2015 Intel Corporation.
   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_MEMMAP_H_
  17 #define _COMMON_MEMMAP_H_
  18
  19 #include <types.h>
  20
  21 /*
  22  * mmap_region_granluarity must to return a size which is a positive non-zero
  23  * integer multiple of the SMM size when SMM is in use.  When not using SMM,
  24  * this value should be set to 8 MiB.
  25  */
  26 size_t mmap_region_granluarity(void);
  27
  28 /* Fills in the arguments for the entire SMM region covered by chipset
  29  * protections. e.g. TSEG. */
  30 void smm_region(void **start, size_t *size);
  31
  32 enum {
  33         /* SMM handler area. */
  34         SMM_SUBREGION_HANDLER,
  35         /* SMM cache region. */
  36         SMM_SUBREGION_CACHE,
  37         /* Chipset specific area. */
  38         SMM_SUBREGION_CHIPSET,
  39         /* Total sub regions supported. */
  40         SMM_SUBREGION_NUM,
  41 };
  42
  43 /* Fills in the start and size for the requested SMM subregion. Returns
  44  * 0 on susccess, < 0 on failure. */
  45 int smm_subregion(int sub, void **start, size_t *size);
  46
  47 #endif /* _COMMON_MEMMAP_H_ */