/* * This file is part of the libpayload project. * * Copyright (C) 2015 Google Inc. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * 3. The name of the author may not be used to endorse or promote products * derived from this software without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF * SUCH DAMAGE. */ #include <libpayload-config.h> #include <libpayload.h> #include <coreboot_tables.h> #include <cbfs.h> #include <fmap_serialized.h> #include <stdint.h> int fmap_region_by_name(const uint32_t fmap_offset, const char * const name, uint32_t * const offset, uint32_t * const size) { int i; struct fmap *fmap; struct fmap fmap_head; struct cbfs_media default_media; struct cbfs_media *media = &default_media; if (init_default_cbfs_media(media) != 0) return -1; media->open(media); if (!media->read(media, &fmap_head, fmap_offset, sizeof(fmap_head))) return -1; if (memcmp(fmap_head.signature, FMAP_SIGNATURE, sizeof(fmap_head.signature))) { return -1; } int fmap_size = sizeof(*fmap) + fmap_head.nareas * sizeof(struct fmap_area); fmap = malloc(fmap_size); if (!fmap) return -1; if (!media->read(media, fmap, fmap_offset, fmap_size)) goto err; media->close(media); for (i = 0; i < fmap->nareas; i++) { if (strcmp((const char *)fmap->areas[i].name, name) != 0) continue; if (offset) *offset = fmap->areas[i].offset; if (size) *size = fmap->areas[i].size; free(fmap); return 0; } err: free(fmap); return -1; }