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/*
* 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_ */
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