| /* |
| * This file is part of the coreboot project. |
| * |
| * Copyright (C) 2015-2016 Intel Corporation. |
| * |
| * 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 _COMMON_MEMMAP_H_ |
| #define _COMMON_MEMMAP_H_ |
| |
| #include <types.h> |
| |
| /* |
| * mmap_region_granularity must to return a size which is a positive non-zero |
| * integer multiple of the SMM size when SMM is in use. When not using SMM, |
| * this value should be set to 8 MiB. |
| */ |
| size_t mmap_region_granularity(void); |
| |
| /* Fills in the arguments for the entire SMM region covered by chipset |
| * protections. e.g. TSEG. */ |
| void smm_region(void **start, size_t *size); |
| |
| enum { |
| /* SMM handler area. */ |
| SMM_SUBREGION_HANDLER, |
| /* SMM cache region. */ |
| SMM_SUBREGION_CACHE, |
| /* Chipset specific area. */ |
| SMM_SUBREGION_CHIPSET, |
| /* Total sub regions supported. */ |
| SMM_SUBREGION_NUM, |
| }; |
| |
| /* Fills in the start and size for the requested SMM subregion. Returns |
| * 0 on susccess, < 0 on failure. */ |
| int smm_subregion(int sub, void **start, size_t *size); |
| |
| #endif /* _COMMON_MEMMAP_H_ */ |
