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/* Copyright (c) 2013 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.
*
* VbSharedDataHeader definition, for sharing with OS.
*/
#ifndef VBOOT_REFERENCE_VBOOT_STRUCT_H_
#define VBOOT_REFERENCE_VBOOT_STRUCT_H_
#include <stdint.h>
#include "2sysincludes.h"
#ifdef __cplusplus
extern "C" {
#endif /* __cplusplus */
/* Constants and sub-structures for VbSharedDataHeader */
/* Magic number for recognizing VbSharedDataHeader ("VbSD") */
#define VB_SHARED_DATA_MAGIC 0x44536256
/* Version for struct_version */
#define VB_SHARED_DATA_VERSION 2
/*
* Flags for VbSharedDataHeader
*
* TODO(b:124141368): Move these constants into crossystem once they are
* no longer needed in vboot2 code.
*/
/* LoadFirmware() tried firmware B because of VbNvStorage firmware B tries;
Deprecated as part of chromium:1010389. */
#define VBSD_FWB_TRIED 0x00000001
/*
* LoadKernel() verified the good kernel keyblock using the kernel subkey from
* the firmware. If this flag is not present, it just used the hash of the
* kernel keyblock.
*/
#define VBSD_KERNEL_KEY_VERIFIED 0x00000002
/* Developer switch was enabled at boot time */
#define VBSD_BOOT_DEV_SWITCH_ON 0x00000010
/* Recovery switch was enabled at boot time */
#define VBSD_BOOT_REC_SWITCH_ON 0x00000020
/* Firmware write protect was enabled at boot time */
#define VBSD_BOOT_FIRMWARE_WP_ENABLED 0x00000040
/* VbInit() was told the system supports EC software sync */
#define VBSD_EC_SOFTWARE_SYNC 0x00000800
/* Firmware used vboot2 for firmware selection */
#define VBSD_BOOT_FIRMWARE_VBOOT2 0x00008000
/* NvStorage uses 64-byte record, not 16-byte */
#define VBSD_NVDATA_V2 0x00100000
/* Data shared to OS. */
typedef struct VbSharedDataHeader {
/* Fields present in version 1 */
/* Magic number for struct (VB_SHARED_DATA_MAGIC) */
uint32_t magic;
/* Version of this structure */
uint32_t struct_version;
/* Size of this structure in bytes */
uint64_t struct_size;
/* Size of shared data buffer in bytes */
uint64_t data_size;
/* Amount of shared data used so far */
uint64_t data_used;
/* Flags */
uint32_t flags;
/* Reserved for padding */
uint32_t reserved0;
/* Previously, kernel subkey, from firmware (struct vb2_packed_key).
Now we use vboot2 workbuf for storage. */
uint8_t reserved1[32];
/* Offset of kernel subkey data from start of this struct */
uint64_t kernel_subkey_data_offset;
/* Size of kernel subkey data */
uint64_t kernel_subkey_data_size;
/*
* These timer values are all deprecated. coreboot tstamp_table should
* be used instead. See crosbug.com/1014102.
*/
/* VbInit() enter/exit */
uint64_t timer_vb_init_enter;
uint64_t timer_vb_init_exit;
/* VbSelectFirmware() enter/exit */
uint64_t timer_vb_select_firmware_enter;
uint64_t timer_vb_select_firmware_exit;
/* VbSelectAndLoadKernel() enter/exit */
uint64_t timer_vb_select_and_load_kernel_enter;
uint64_t timer_vb_select_and_load_kernel_exit;
/* Information stored in TPM, as retrieved by firmware */
/* Current firmware version in TPM */
uint32_t fw_version_tpm;
/* Current kernel version in TPM */
uint32_t kernel_version_tpm;
/* Debugging information from LoadFirmware() */
/* Result of checking RW firmware A and B */
uint8_t check_fw_a_result;
uint8_t check_fw_b_result;
/* Firmware index returned by LoadFirmware() or 0xFF if failure */
uint8_t firmware_index;
/* Reserved for padding */
uint8_t reserved2;
/* Firmware TPM version at start of VbSelectFirmware() */
uint32_t fw_version_tpm_start;
/* Firmware lowest version found */
uint32_t fw_version_lowest;
/* Debugging information from LoadKernel() */
/* Number of times LoadKernel() called */
uint32_t lk_call_count;
/* Reserved for padding */
uint8_t reserved3[896];
/*
* Offset and size of supplemental kernel data. Reserve space for
* these fields now, so that future LoadKernel() versions can store
* information there without needing to shift down whatever data the
* original LoadFirmware() might have put immediately following its
* VbSharedDataHeader.
*/
uint64_t kernel_supplemental_offset;
uint64_t kernel_supplemental_size;
/*
* Fields added in version 2. Before accessing, make sure that
* struct_version >= 2
*/
/* Recovery reason for current boot */
uint8_t recovery_reason;
/* Reserved for padding */
uint8_t reserved4[7];
/* Flags from firmware keyblock */
uint64_t fw_keyblock_flags;
/* Kernel TPM version at start of VbSelectAndLoadKernel() */
uint32_t kernel_version_tpm_start;
/* Kernel lowest version found */
uint32_t kernel_version_lowest;
} __attribute__((packed)) VbSharedDataHeader;
/* Size of VbSharedDataheader for each version */
#define VB_SHARED_DATA_HEADER_SIZE_V1 1072
#define VB_SHARED_DATA_HEADER_SIZE_V2 1096
_Static_assert(VB_SHARED_DATA_HEADER_SIZE_V1
== offsetof(VbSharedDataHeader, recovery_reason),
"VB_SHARED_DATA_HEADER_SIZE_V1 incorrect");
_Static_assert(VB_SHARED_DATA_HEADER_SIZE_V2 == sizeof(VbSharedDataHeader),
"VB_SHARED_DATA_HEADER_SIZE_V2 incorrect");
#ifdef __cplusplus
}
#endif /* __cplusplus */
#endif /* VBOOT_REFERENCE_VBOOT_STRUCT_H_ */
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