8fac662f30
This patch introduces new FlashMap API, the fmap_locate_area(). It works on cached FlashMap provided in lib_sysinfo.fmap_cache. Change-Id: Idbf9016ce73aa58e17f3ee19920ab83dc6c25abb Signed-off-by: Jakub Czapiga <jacz@semihalf.com> Reviewed-on: https://review.coreboot.org/c/coreboot/+/59494 Tested-by: build bot (Jenkins) <no-reply@coreboot.org> Reviewed-by: Julius Werner <jwerner@chromium.org>
134 lines
4.0 KiB
C
134 lines
4.0 KiB
C
/*
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*
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* Copyright (C) 2015 Google Inc.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. The name of the author may not be used to endorse or promote products
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* derived from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#include <libpayload-config.h>
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#include <libpayload.h>
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#include <commonlib/bsd/fmap_serialized.h>
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#include <coreboot_tables.h>
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#include <cbfs.h>
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#include <boot_device.h>
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#include <stdint.h>
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#include <arch/virtual.h>
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/* Private fmap cache. */
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static struct fmap *_fmap_cache;
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static cb_err_t fmap_find_area(struct fmap *fmap, const char *name, size_t *offset,
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size_t *size)
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{
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for (size_t i = 0; i < le32toh(fmap->nareas); ++i) {
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if (strncmp((const char *)fmap->areas[i].name, name, FMAP_STRLEN) != 0)
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continue;
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if (offset)
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*offset = le32toh(fmap->areas[i].offset);
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if (size)
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*size = le32toh(fmap->areas[i].size);
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return CB_SUCCESS;
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}
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return CB_ERR;
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}
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static bool fmap_is_signature_valid(struct fmap *fmap)
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{
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return memcmp(fmap->signature, FMAP_SIGNATURE, sizeof(fmap->signature)) == 0;
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}
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static bool fmap_setup_cache(void)
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{
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/* Use FMAP cache if available */
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if (lib_sysinfo.fmap_cache
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&& fmap_is_signature_valid((struct fmap *)phys_to_virt(lib_sysinfo.fmap_cache))) {
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_fmap_cache = (struct fmap *)phys_to_virt(lib_sysinfo.fmap_cache);
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return true;
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}
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return false;
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}
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cb_err_t fmap_locate_area(const char *name, size_t *offset, size_t *size)
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{
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if (!_fmap_cache && !fmap_setup_cache())
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return CB_ERR;
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return fmap_find_area(_fmap_cache, name, offset, size);
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}
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/***********************************************************************************************
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* LEGACY CODE *
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**********************************************************************************************/
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int fmap_region_by_name(const uint32_t fmap_offset, const char * const name,
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uint32_t * const offset, uint32_t * const size)
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{
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int i;
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struct fmap *fmap;
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struct fmap fmap_head;
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struct cbfs_media default_media;
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struct cbfs_media *media = &default_media;
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if (init_default_cbfs_media(media) != 0)
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return -1;
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media->open(media);
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if (!media->read(media, &fmap_head, fmap_offset, sizeof(fmap_head)))
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return -1;
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if (memcmp(fmap_head.signature, FMAP_SIGNATURE, sizeof(fmap_head.signature))) {
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return -1;
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}
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int fmap_size = sizeof(*fmap) +
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fmap_head.nareas * sizeof(struct fmap_area);
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fmap = malloc(fmap_size);
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if (!fmap)
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return -1;
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if (!media->read(media, fmap, fmap_offset, fmap_size))
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goto err;
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media->close(media);
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for (i = 0; i < fmap->nareas; i++) {
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if (strcmp((const char *)fmap->areas[i].name, name) != 0)
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continue;
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if (offset)
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*offset = fmap->areas[i].offset;
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if (size)
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*size = fmap->areas[i].size;
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free(fmap);
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return 0;
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}
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err:
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free(fmap);
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return -1;
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}
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