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/* Copyright 2015 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.
*
* Non-volatile storage bitfields
*/
#ifndef VBOOT_REFERENCE_VBOOT_2NVSTORAGE_FIELDS_H_
#define VBOOT_REFERENCE_VBOOT_2NVSTORAGE_FIELDS_H_
/*
* Constants for NV storage. We use this rather than structs and bitfields so
* the data format is consistent across platforms and compilers. Total NV
* storage size is VB2_NVDATA_SIZE = 16 bytes.
*
* These constants must match the equivalent constants in
* lib/vboot_nvstorage.c. (We currently don't share a common header file
* because we're tring to keep the two libs independent, and we hope to
* deprecate that one.)
*/
enum vb2_nv_offset {
VB2_NV_OFFS_HEADER = 0,
VB2_NV_OFFS_BOOT = 1,
VB2_NV_OFFS_RECOVERY = 2,
VB2_NV_OFFS_LOCALIZATION = 3,
VB2_NV_OFFS_DEV = 4,
VB2_NV_OFFS_TPM = 5,
VB2_NV_OFFS_RECOVERY_SUBCODE = 6,
VB2_NV_OFFS_BOOT2 = 7,
VB2_NV_OFFS_MISC = 8,
/* Offsets 9-10 are currently unused */
VB2_NV_OFFS_KERNEL = 11, /* 11-14; field is 32 bits */
/* CRC must be last field */
VB2_NV_OFFS_CRC = 15
};
/* Fields in VB2_NV_OFFS_HEADER (unused = 0x07) */
#define VB2_NV_HEADER_WIPEOUT 0x08
#define VB2_NV_HEADER_KERNEL_SETTINGS_RESET 0x10
#define VB2_NV_HEADER_FW_SETTINGS_RESET 0x20
#define VB2_NV_HEADER_SIGNATURE 0x40
#define VB2_NV_HEADER_MASK 0xc0
/* Fields in VB2_NV_OFFS_BOOT */
#define VB2_NV_BOOT_TRY_COUNT_MASK 0x0f
#define VB2_NV_BOOT_BACKUP_NVRAM 0x10
#define VB2_NV_BOOT_OPROM_NEEDED 0x20
#define VB2_NV_BOOT_DISABLE_DEV 0x40
#define VB2_NV_BOOT_DEBUG_RESET 0x80
/* Fields in VB2_NV_OFFS_BOOT2 (unused = 0x80) */
#define VB2_NV_BOOT2_RESULT_MASK 0x03
#define VB2_NV_BOOT2_TRIED 0x04
#define VB2_NV_BOOT2_TRY_NEXT 0x08
#define VB2_NV_BOOT2_PREV_RESULT_MASK 0x30
#define VB2_NV_BOOT2_PREV_RESULT_SHIFT 4 /* Number of bits to shift result */
#define VB2_NV_BOOT2_PREV_TRIED 0x40
/* Fields in VB2_NV_OFFS_DEV (unused = 0xc0) */
#define VB2_NV_DEV_FLAG_USB 0x01
#define VB2_NV_DEV_FLAG_SIGNED_ONLY 0x02
#define VB2_NV_DEV_FLAG_LEGACY 0x04
#define VB2_NV_DEV_FLAG_FASTBOOT_FULL_CAP 0x08
#define VB2_NV_DEV_FLAG_DEFAULT_BOOT 0x30
#define VB2_NV_DEV_DEFAULT_BOOT_SHIFT 4 /* Number of bits to shift */
/* Fields in VB2_NV_OFFS_TPM (unused = 0xf8) */
#define VB2_NV_TPM_CLEAR_OWNER_REQUEST 0x01
#define VB2_NV_TPM_CLEAR_OWNER_DONE 0x02
#define VB2_NV_TPM_REBOOTED 0x04
/* Fields in VB2_NV_OFFS_MISC (unused = 0xf8) */
#define VB2_NV_MISC_UNLOCK_FASTBOOT 0x01
#define VB2_NV_MISC_BOOT_ON_AC_DETECT 0x02
#define VB2_NV_MISC_TRY_RO_SYNC 0x04
#endif /* VBOOT_REFERENCE_VBOOT_2NVSTORAGE_FIELDS_H_ */
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