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/*
* Copyright (c) 2011 The Chromium OS Authors. All rights reserved.
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
*/
#ifndef __FMAP_H__
#define __FMAP_H__
#include <inttypes.h>
#include <stddef.h>
/* FMAP structs. See http://code.google.com/p/flashmap/wiki/FmapSpec */
#define FMAP_NAMELEN 32
#define FMAP_SIGNATURE "__FMAP__"
#define FMAP_SIGNATURE_SIZE 8
#define FMAP_SEARCH_STRIDE 4
#define FMAP_VER_MAJOR 1
typedef struct _FmapHeader {
/* Avoid endian issues in signature... */
char fmap_signature[FMAP_SIGNATURE_SIZE];
uint8_t fmap_ver_major;
uint8_t fmap_ver_minor;
uint64_t fmap_base;
uint32_t fmap_size;
char fmap_name[FMAP_NAMELEN];
uint16_t fmap_nareas;
} __attribute__((packed)) FmapHeader;
enum fmap_flags {
FMAP_AREA_STATIC = 1 << 0,
FMAP_AREA_COMPRESSED = 1 << 1,
FMAP_AREA_RO = 1 << 2,
/* Should be preserved on update or rollback. */
FMAP_AREA_PRESERVE = 1 << 3,
};
typedef struct _FmapAreaHeader {
uint32_t area_offset;
uint32_t area_size;
char area_name[FMAP_NAMELEN];
uint16_t area_flags;
} __attribute__((packed)) FmapAreaHeader;
/* Find and point to the FMAP header within the buffer */
FmapHeader *fmap_find(uint8_t *ptr, size_t size);
/* Search for an area by name, return pointer to its beginning */
uint8_t *fmap_find_by_name(uint8_t *ptr, size_t size,
/* optional, will call fmap_find() if NULL */
FmapHeader *fmap,
/* The area name to search for */
const char *name,
/* optional, return pointer to entry if not NULL */
FmapAreaHeader **ah);
#endif /* __FMAP_H__ */
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