51 lines
1.5 KiB
C
51 lines
1.5 KiB
C
/* SPDX-License-Identifier: GPL-2.0-only */
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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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#include <commonlib/region.h>
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enum {
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MRC_TRAINING_DATA,
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MRC_VARIABLE_DATA,
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};
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/*
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* It's up to the caller to decide when to retrieve and stash data. There is
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* differentiation on recovery mode CONFIG(HAS_RECOVERY_MRC_CACHE), but that's
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* only for locating where to retrieve and save the data. If a platform doesn't
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* want to update the data then it shouldn't stash the data for saving.
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* Similarly, if the platform doesn't need the data for booting because of a
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* policy don't request the data.
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*/
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/* Get and stash data for saving provided the type passed in. */
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/**
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* mrc_cache_load_current
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*
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* Fill in the buffer with the latest slot data. This will be a
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* common entry point for ARM platforms. Returns < 0 on error, size
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* of the returned data on success.
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*/
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ssize_t mrc_cache_load_current(int type, uint32_t version, void *buffer,
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size_t buffer_size);
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/**
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* mrc_cache_mmap_leak
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*
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* Return a pointer to a buffer with the latest slot data. An mmap
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* will be executed (without a matching unmap). This will be a common
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* entry point for platforms where mmap is considered a noop, like x86
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*/
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void *mrc_cache_current_mmap_leak(int type, uint32_t version,
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size_t *data_size);
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/**
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* Returns < 0 on error, 0 on success.
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*/
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int mrc_cache_stash_data(int type, uint32_t version, const void *data,
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size_t size);
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#endif /* _COMMON_MRC_CACHE_H_ */
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