cab1c01885
1. Re-factor MRC cache driver to properly select RW_MRC_CACHE or
RECOVERY_MRC_CACHE based on the boot mode.
- If normal mode boot, use RW_MRC_CACHE, if available.
- If recovery mode boot:
- Retrain memory if RECOVERY_MRC_CACHE not present, or recovery is
requested explicity with retrain memory request.
- Use RECOVERY_MRC_CACHE otherwise.
2. Protect RW and RECOVERY mrc caches in recovery and non-recovery boot
modes. Check if both are present under one unified region and protect
that region as a whole. Else try protecting individual regions.
3. Update training data in appropriate cache:
- Use RW_MRC_CACHE if normal mode.
- Use RECOVERY_MRC_CACHE if present in recovery mode. Else use
RW_MRC_CACHE.
4. Add proper debug logs to indicate which training data cache is used
at any point.
BUG=chrome-os-partner:59352
BRANCH=None
TEST=Verified that correct cache is used in both normal and recovery
mode on reef.
Change-Id: Ie79737a1450bd1ff71543e44a5a3e16950e70fb3
Signed-off-by: Furquan Shaikh <furquan@chromium.org>
Reviewed-on: https://review.coreboot.org/17242
Tested-by: build bot (Jenkins)
Reviewed-by: Aaron Durbin <adurbin@chromium.org>
49 lines
1.6 KiB
C
49 lines
1.6 KiB
C
/*
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* This file is part of the coreboot project.
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*
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* Copyright (C) 2014 Google Inc.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; version 2 of the License.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*/
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#ifndef _COMMON_MRC_CACHE_H_
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#define _COMMON_MRC_CACHE_H_
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#include <stddef.h>
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#include <stdint.h>
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#define DEFAULT_MRC_CACHE "RW_MRC_CACHE"
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#define RECOVERY_MRC_CACHE "RECOVERY_MRC_CACHE"
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#define UNIFIED_MRC_CACHE "UNIFIED_MRC_CACHE"
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/* Wrapper object to save MRC information. */
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struct mrc_saved_data {
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uint32_t signature;
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uint32_t size;
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uint32_t checksum;
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uint32_t version;
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uint8_t data[0];
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} __attribute__((packed));
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/* Locate the most recently saved MRC data. */
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int mrc_cache_get_current(const struct mrc_saved_data **cache);
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int mrc_cache_get_current_with_version(const struct mrc_saved_data **cache,
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uint32_t version);
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int mrc_cache_get_current_from_region(const struct mrc_saved_data **cache,
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uint32_t version,
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const char *region_name);
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/* Stash the resulting MRC data to be saved in non-volatile storage later. */
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int mrc_cache_stash_data(const void *data, size_t size);
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int mrc_cache_stash_data_with_version(const void *data, size_t size,
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uint32_t version);
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#endif /* _COMMON_MRC_CACHE_H_ */
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