/* 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,
	VB2_NV_OFFS_KERNEL_MAX_ROLLFORWARD1 = 9, /* bits 0-7 of 32 */
	VB2_NV_OFFS_KERNEL_MAX_ROLLFORWARD2 = 10, /* bits 8-15 of 32 */
	VB2_NV_OFFS_KERNEL1 = 11, /* bits 0-7 of 16 */
	VB2_NV_OFFS_KERNEL2 = 12, /* bits 8-15 of 16 */
	VB2_NV_OFFS_KERNEL_MAX_ROLLFORWARD3 = 13, /* bits 16-23 of 32 */
	VB2_NV_OFFS_KERNEL_MAX_ROLLFORWARD4 = 14, /* bits 24-31 of 32 */
	/* 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 = 0x80) */
#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 */
#define VB2_NV_DEV_FLAG_UDC                    0x40

/* 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 = 0xf0) */
#define VB2_NV_MISC_UNLOCK_FASTBOOT            0x01
#define VB2_NV_MISC_BOOT_ON_AC_DETECT          0x02
#define VB2_NV_MISC_TRY_RO_SYNC		       0x04
#define VB2_NV_MISC_BATTERY_CUTOFF             0x08

#endif  /* VBOOT_REFERENCE_VBOOT_2NVSTORAGE_FIELDS_H_ */