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/* Copyright 2013 The ChromiumOS Authors
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
*/
#ifndef VBOOT_REFERENCE_FILE_TYPE_BIOS_H_
#define VBOOT_REFERENCE_FILE_TYPE_BIOS_H_
#include <stdint.h>
#include "futility.h"
/*
* The Chrome OS BIOS must contain specific FMAP areas, which we want to look
* at in a certain order.
*/
enum bios_component {
BIOS_FMAP_GBB,
BIOS_FMAP_FW_MAIN_A,
BIOS_FMAP_FW_MAIN_B,
BIOS_FMAP_VBLOCK_A,
BIOS_FMAP_VBLOCK_B,
NUM_BIOS_COMPONENTS
};
static const char *const fmap_name[] = {
"GBB", /* BIOS_FMAP_GBB */
"FW_MAIN_A", /* BIOS_FMAP_FW_MAIN_A */
"FW_MAIN_B", /* BIOS_FMAP_FW_MAIN_B */
"VBLOCK_A", /* BIOS_FMAP_VBLOCK_A */
"VBLOCK_B", /* BIOS_FMAP_VBLOCK_B */
};
_Static_assert(ARRAY_SIZE(fmap_name) == NUM_BIOS_COMPONENTS,
"Size of fmap_name[] should match NUM_BIOS_COMPONENTS");
/* Location information for each component */
struct bios_area_s {
uint32_t offset; /* to avoid pointer math */
uint8_t *buf;
uint32_t len;
uint32_t is_valid;
/* VBLOCK only */
uint32_t flags;
uint32_t version;
/* FW_MAIN only */
size_t fw_size; /* effective size from cbfstool (if available) */
struct vb2_hash metadata_hash;
};
/* State to track as we visit all components */
struct bios_state_s {
/* Current component */
enum bios_component c;
/* Other activites, possibly before or after the current one */
struct bios_area_s area[NUM_BIOS_COMPONENTS];
struct bios_area_s recovery_key;
struct bios_area_s rootkey;
};
#endif /* VBOOT_REFERENCE_FILE_TYPE_BIOS_H_ */
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