1 /* Copyright 2015 The Chromium OS Authors. All rights reserved. 2 * Use of this source code is governed by a BSD-style license that can be 3 * found in the LICENSE file. 4 * 5 * Non-volatile storage bitfields 6 */ 7 8 #ifndef VBOOT_REFERENCE_VBOOT_2NVSTORAGE_FIELDS_H_ 9 #define VBOOT_REFERENCE_VBOOT_2NVSTORAGE_FIELDS_H_ 10 11 /* 12 * Constants for NV storage. We use this rather than structs and bitfields so 13 * the data format is consistent across platforms and compilers. Total NV 14 * storage size is VB2_NVDATA_SIZE = 16 bytes. 15 * 16 * These constants must match the equivalent constants in 17 * lib/vboot_nvstorage.c. (We currently don't share a common header file 18 * because we're tring to keep the two libs independent, and we hope to 19 * deprecate that one.) 20 */ 21 22 enum vb2_nv_offset { 23 VB2_NV_OFFS_HEADER = 0, 24 VB2_NV_OFFS_BOOT = 1, 25 VB2_NV_OFFS_RECOVERY = 2, 26 VB2_NV_OFFS_LOCALIZATION = 3, 27 VB2_NV_OFFS_DEV = 4, 28 VB2_NV_OFFS_TPM = 5, 29 VB2_NV_OFFS_RECOVERY_SUBCODE = 6, 30 VB2_NV_OFFS_BOOT2 = 7, 31 /* Offsets 8-10 are currently unused */ 32 VB2_NV_OFFS_KERNEL = 11, /* 11-14; field is 32 bits */ 33 /* CRC must be last field */ 34 VB2_NV_OFFS_CRC = 15 35 }; 36 37 /* Fields in VB2_NV_OFFS_HEADER (unused = 0x0f) */ 38 #define VB2_NV_HEADER_KERNEL_SETTINGS_RESET 0x10 39 #define VB2_NV_HEADER_FW_SETTINGS_RESET 0x20 40 #define VB2_NV_HEADER_SIGNATURE 0x40 41 #define VB2_NV_HEADER_MASK 0xc0 42 43 /* Fields in VB2_NV_OFFS_BOOT */ 44 #define VB2_NV_BOOT_TRY_COUNT_MASK 0x0f 45 #define VB2_NV_BOOT_BACKUP_NVRAM 0x10 46 #define VB2_NV_BOOT_OPROM_NEEDED 0x20 47 #define VB2_NV_BOOT_DISABLE_DEV 0x40 48 #define VB2_NV_BOOT_DEBUG_RESET 0x80 49 50 /* Fields in VB2_NV_OFFS_BOOT2 (unused = 0x80) */ 51 #define VB2_NV_BOOT2_RESULT_MASK 0x03 52 #define VB2_NV_BOOT2_TRIED 0x04 53 #define VB2_NV_BOOT2_TRY_NEXT 0x08 54 #define VB2_NV_BOOT2_PREV_RESULT_MASK 0x30 55 #define VB2_NV_BOOT2_PREV_RESULT_SHIFT 4 /* Number of bits to shift result */ 56 #define VB2_NV_BOOT2_PREV_TRIED 0x40 57 58 /* Fields in VB2_NV_OFFS_DEV (unused = 0xf8) */ 59 #define VB2_NV_DEV_FLAG_USB 0x01 60 #define VB2_NV_DEV_FLAG_SIGNED_ONLY 0x02 61 #define VB2_NV_DEV_FLAG_LEGACY 0x04 62 63 /* Fields in VB2_NV_OFFS_TPM (unused = 0xfc) */ 64 #define VB2_NV_TPM_CLEAR_OWNER_REQUEST 0x01 65 #define VB2_NV_TPM_CLEAR_OWNER_DONE 0x02 66 67 #endif /* VBOOT_REFERENCE_VBOOT_2NVSTORAGE_FIELDS_H_ */ 68
