2d90ddd2d2
Add region_file_update_data_arr, which has the same functionality as
region_file_update_data, but accepts mutliple data buffers. This is
useful for when we have the mrc_metadata and data in non-contiguous
addresses, which is the case when we bypass the storing of mrc_cache
data into the cbmem.
BUG=b:150502246
BRANCH=None
TEST=reboot from ec console. Make sure memory training happens.
reboot from ec console. Make sure that we don't do training again.
Change-Id: Ia530f7d428b9b07ce3a73e348016038d9daf4c15
Signed-off-by: Shelley Chen <shchen@google.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/45407
Reviewed-by: Furquan Shaikh <furquan@google.com>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
63 lines
1.9 KiB
C
63 lines
1.9 KiB
C
/* SPDX-License-Identifier: GPL-2.0-only */
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#ifndef REGION_FILE_H
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#define REGION_FILE_H
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#include <commonlib/region.h>
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#include <stddef.h>
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#include <stdint.h>
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/*
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* A region file is an abstraction to allow appending updates in a
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* region_device where the data returned is the most recently written
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* data. It is block based with a 16 byte granularity. So if you write
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* 2 bytes into the file the data returned in the region_device would
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* have 16 bytes allocated for the latest update. Additionally, the
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* current maximum file size allowed is 1MiB - 48 bytes. See comments
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* in C implementation file for further details.
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*/
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struct region_file;
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/*
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* Initialize a region file associated with a provided region device.
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* Returns < 0 on error, 0 on success.
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*/
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int region_file_init(struct region_file *f, const struct region_device *p);
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/*
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* Initialize region device object associated with latest update of file data.
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* Returns < 0 on error, 0 on success.
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*/
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int region_file_data(const struct region_file *f, struct region_device *rdev);
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/*
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* Create region file entry struct to insert multiple data buffers
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* into the same region_file.
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*/
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struct update_region_file_entry {
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/* size of this entry */
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size_t size;
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/* data pointer */
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const void *data;
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};
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/* Update region file with latest data. Returns < 0 on error, 0 on success. */
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int region_file_update_data_arr(struct region_file *f,
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const struct update_region_file_entry *entries,
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size_t num_entries);
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int region_file_update_data(struct region_file *f, const void *buf, size_t size);
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/* Declared here for easy object allocation. */
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struct region_file {
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/* Region device covering file */
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struct region_device rdev;
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/* Metadata containing blocks of the data stream. */
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struct region_device metadata;
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/* Blocks forming data. */
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uint16_t data_blocks[2];
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/* Current slot in metadata marking end of data. */
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int slot;
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};
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#endif /* REGION_FILE_H */
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