| /* 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. |
| * |
| * Data structure of Google Binary Block (GBB) |
| */ |
| |
| #ifndef VBOOT_REFERENCE_GBB_HEADER_H_ |
| #define VBOOT_REFERENCE_GBB_HEADER_H_ |
| |
| #include "sysincludes.h" |
| |
| #define GBB_HEADER_SIZE 128 |
| |
| #define GBB_SIGNATURE "$GBB" |
| #define GBB_SIGNATURE_SIZE 4 |
| |
| /* GBB version constants. |
| * |
| * If the major version is different than the reader can handle, it |
| * shouldn't attempt to parse the GBB. |
| * |
| * If the minor version is different, the reader can still parse it. |
| * If the minor version is greater than expected, new fields were |
| * added in a way which does not interfere with the old fields. If |
| * it's less than expected, some of the fields expected by the reader |
| * aren't initialized, and the reader should return default values for |
| * those fields. */ |
| #define GBB_MAJOR_VER 1 |
| #define GBB_MINOR_VER 1 |
| |
| /* Maximum length of a HWID in bytes, counting terminating null. */ |
| #define GBB_HWID_MAX_SIZE 256 |
| |
| /* Flags for .flags field */ |
| /* Reduce the dev screen delay to 2 sec from 30 sec to speedup factory. */ |
| #define GBB_FLAG_DEV_SCREEN_SHORT_DELAY 0x00000001 |
| /* BIOS should load option ROMs from arbitrary PCI devices. We'll never enable |
| * this ourselves because it executes non-verified code, but if a customer wants |
| * to void their warranty and set this flag in the read-only flash, they should |
| * be able to do so. */ |
| #define GBB_FLAG_LOAD_OPTION_ROMS 0x00000002 |
| /* The factory flow may need the BIOS to boot a non-ChromeOS kernel if the |
| * dev-switch is on. This flag allows that. */ |
| #define GBB_FLAG_ENABLE_ALTERNATE_OS 0x00000004 |
| /* Force dev switch on, regardless of physical/keyboard dev switch position. */ |
| #define GBB_FLAG_FORCE_DEV_SWITCH_ON 0x00000008 |
| /* Allow booting from USB in dev mode even if dev_boot_usb=0. */ |
| #define GBB_FLAG_FORCE_DEV_BOOT_USB 0x00000010 |
| /* Disable firmware rollback protection. */ |
| #define GBB_FLAG_DISABLE_FW_ROLLBACK_CHECK 0x00000020 |
| /* Allow Enter key to trigger dev->tonorm screen transition */ |
| #define GBB_FLAG_ENTER_TRIGGERS_TONORM 0x00000040 |
| |
| |
| #ifdef __cplusplus |
| extern "C" { |
| #endif /* __cplusplus */ |
| |
| typedef struct GoogleBinaryBlockHeader { |
| /* Fields present in version 1.0 */ |
| uint8_t signature[GBB_SIGNATURE_SIZE]; /* GBB_SIGNATURE "$GBB" */ |
| uint16_t major_version; /* See GBB_MAJOR_VER */ |
| uint16_t minor_version; /* See GBB_MINOR_VER */ |
| uint32_t header_size; /* size of GBB header in bytes */ |
| uint32_t flags; /* Flags (see GBB_FLAG_*), should be 0 for 1.0. */ |
| |
| uint32_t hwid_offset; /* HWID offset from start of header */ |
| uint32_t hwid_size; /* HWID size in bytes */ |
| uint32_t rootkey_offset; /* Root Key offset from start of header */ |
| uint32_t rootkey_size; /* Root Key size in bytes */ |
| uint32_t bmpfv_offset; /* BMP FV offset from start of header */ |
| uint32_t bmpfv_size; /* BMP FV size in bytes */ |
| uint32_t recovery_key_offset; /* Recovery Key offset from start of header */ |
| uint32_t recovery_key_size; /* Recovery Key size in bytes */ |
| |
| uint8_t pad[80]; /* To match GBB_HEADER_SIZE. Initialize to 0. */ |
| } __attribute__((packed)) GoogleBinaryBlockHeader; |
| |
| #ifdef __cplusplus |
| } |
| #endif /* __cplusplus */ |
| |
| #endif /* VBOOT_REFERENCE_GBB_HEADER_H_ */ |