| /* |
| * |
| * 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 <commonlib/bsd/fmap_serialized.h> |
| #include <coreboot_tables.h> |
| #include <cbfs.h> |
| #include <boot_device.h> |
| #include <stdint.h> |
| #include <arch/virtual.h> |
| |
| /* Private fmap cache. */ |
| static struct fmap *_fmap_cache; |
| |
| static enum cb_err fmap_find_area(struct fmap *fmap, const char *name, size_t *offset, |
| size_t *size) |
| { |
| for (size_t i = 0; i < le32toh(fmap->nareas); ++i) { |
| if (strncmp((const char *)fmap->areas[i].name, name, FMAP_STRLEN) != 0) |
| continue; |
| if (offset) |
| *offset = le32toh(fmap->areas[i].offset); |
| if (size) |
| *size = le32toh(fmap->areas[i].size); |
| return CB_SUCCESS; |
| } |
| |
| return CB_ERR; |
| } |
| |
| static bool fmap_is_signature_valid(struct fmap *fmap) |
| { |
| return memcmp(fmap->signature, FMAP_SIGNATURE, sizeof(fmap->signature)) == 0; |
| } |
| |
| static bool fmap_setup_cache(void) |
| { |
| /* Use FMAP cache if available */ |
| if (lib_sysinfo.fmap_cache |
| && fmap_is_signature_valid((struct fmap *)phys_to_virt(lib_sysinfo.fmap_cache))) { |
| _fmap_cache = (struct fmap *)phys_to_virt(lib_sysinfo.fmap_cache); |
| return true; |
| } |
| |
| return false; |
| } |
| |
| enum cb_err fmap_locate_area(const char *name, size_t *offset, size_t *size) |
| { |
| if (!_fmap_cache && !fmap_setup_cache()) |
| return CB_ERR; |
| |
| return fmap_find_area(_fmap_cache, name, offset, size); |
| } |