| /* |
| * Copyright 2010, Google Inc. |
| * All rights reserved. |
| * |
| * Redistribution and use in source and binary forms, with or without |
| * modification, are permitted provided that the following conditions are |
| * met: |
| * |
| * * Redistributions of source code must retain the above copyright |
| * notice, this list of conditions and the following disclaimer. |
| * * 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. |
| * * Neither the name of Google Inc. nor the names of its |
| * contributors may be used to endorse or promote products derived from |
| * this software without specific prior written permission. |
| * |
| * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS 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 COPYRIGHT |
| * OWNER 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. |
| * |
| * Alternatively, this software may be distributed under the terms of the |
| * GNU General Public License ("GPL") version 2 as published by the Free |
| * Software Foundation. |
| * |
| * This is ported from the flashmap utility: http://flashmap.googlecode.com |
| */ |
| |
| #ifndef FLASHMAP_LIB_FMAP_H__ |
| #define FLASHMAP_LIB_FMAP_H__ |
| |
| #include <inttypes.h> |
| |
| struct flashctx; |
| |
| #define FMAP_SIGNATURE "__FMAP__" |
| #define FMAP_VER_MAJOR 1 /* this header's FMAP minor version */ |
| #define FMAP_VER_MINOR 1 /* this header's FMAP minor version */ |
| #define FMAP_STRLEN 32 /* maximum length for strings, */ |
| /* including null-terminator */ |
| |
| enum fmap_flags { |
| FMAP_AREA_STATIC = 1 << 0, |
| FMAP_AREA_COMPRESSED = 1 << 1, |
| FMAP_AREA_RO = 1 << 2, |
| }; |
| |
| struct fmap_area { |
| uint32_t offset; /* offset relative to base */ |
| uint32_t size; /* size in bytes */ |
| uint8_t name[FMAP_STRLEN]; /* descriptive name */ |
| uint16_t flags; /* flags for this area */ |
| } __attribute__((packed)); |
| /* Mapping of volatile and static regions in firmware binary */ |
| struct fmap { |
| uint64_t signature; /* "__FMAP__" (0x5F5F50414D465F5F) */ |
| uint8_t ver_major; /* major version */ |
| uint8_t ver_minor; /* minor version */ |
| uint64_t base; /* address of the firmware binary */ |
| uint32_t size; /* size of firmware binary in bytes */ |
| uint8_t name[FMAP_STRLEN]; /* name of this firmware binary */ |
| uint16_t nareas; /* number of areas described by |
| fmap_areas[] below */ |
| struct fmap_area areas[]; |
| } __attribute__((packed)); |
| |
| struct search_info; |
| |
| /* |
| * fmap_find - find FMAP signature at offset in an image and copy it to buffer |
| * |
| * @flash: flash structure containing read function |
| * @fmap: pointer to fmap header |
| * @offset: offset of fmap header in image |
| * @buf: unallocated buffer to store fmap struct |
| * |
| * This function allocates memory which the caller must free. It does no error |
| * checking. The caller is responsible for verifying that the contents are |
| * sane. |
| * |
| * returns 1 if found, 0 if not found, <0 to indicate failure |
| */ |
| int fmap_find(struct flashctx *flash, struct fmap *fmap, loff_t offset, |
| uint8_t **buf); |
| |
| /* Like fmap_find, but give a memory location to search FMAP. */ |
| struct fmap *fmap_find_in_memory(uint8_t *image, int size); |
| |
| |
| #endif /* FLASHMAP_LIB_FMAP_H__*/ |