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author | Rizwan Qureshi <rizwan.qureshi@intel.com> | 2016-08-24 16:05:32 +0530 |
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committer | Martin Roth <martinroth@google.com> | 2016-08-31 17:39:05 +0200 |
commit | 4dfe13081922454e97e6b0f8d6532cd97c635b60 (patch) | |
tree | 6de04389a077cddbff70e76d2605e68246985ad4 /src/drivers/intel/fsp2_0/include/fsp | |
parent | 3156934bf8f059fb8ba14965b75ed0ccb56c79cb (diff) | |
download | coreboot-4dfe13081922454e97e6b0f8d6532cd97c635b60.tar.xz |
driver/intel/fsp2.0: Add External stage cache region helper
If ramstage caching outside CBMEM is enabled
i.e CONFIG_CACHE_RELOCATED_RAMSTAGE_OUTSIDE_CBMEM, then a
helper function to determine the caching region in SMM
should be implemented. Add the same to FSP2.0 driver.
FSP1.1 driver had the same implementation hence copied stage_cache.c.
The SoC code should implement the smm_subregion to provide
the base and size of the caching region within SMM. The fsp/memmap.h
provides the prototype and we will reuse the same from FPS 1.1.
Change-Id: I4412a710391dc0cee044b96403c50260c3534e6f
Signed-off-by: Rizwan Qureshi <rizwan.qureshi@intel.com>
Reviewed-on: https://review.coreboot.org/16312
Reviewed-by: Aaron Durbin <adurbin@chromium.org>
Tested-by: build bot (Jenkins)
Diffstat (limited to 'src/drivers/intel/fsp2_0/include/fsp')
-rw-r--r-- | src/drivers/intel/fsp2_0/include/fsp/memmap.h | 47 |
1 files changed, 47 insertions, 0 deletions
diff --git a/src/drivers/intel/fsp2_0/include/fsp/memmap.h b/src/drivers/intel/fsp2_0/include/fsp/memmap.h new file mode 100644 index 0000000000..965bce646e --- /dev/null +++ b/src/drivers/intel/fsp2_0/include/fsp/memmap.h @@ -0,0 +1,47 @@ +/* + * 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_ */ |