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x86: Add a layout for Chrome OS verified boot

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Add definitions for part of the vboot context used with verified boot.

Signed-off-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Bin Meng <bmeng.cn@gmail.com>
This commit is contained in:
Simon Glass 2020-11-04 09:57:16 -07:00 committed by Bin Meng
parent 6571d87315
commit dac7778d74
1 changed files with 38 additions and 0 deletions
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38
arch/x86/include/asm/acpi/vbnv_layout.h Normal file
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/* SPDX-License-Identifier: GPL-2.0 */
/*
* Copyright 2020 Google LLC
*/
#ifndef __ASM_ACPI_VBNV_LAYOUT_H__
#define __ASM_ACPI_VBNV_LAYOUT_H__
#define VBOOT_VBNV_BLOCK_SIZE 16 /* Size of NV storage block in bytes */
/* Constants for NV storage, for use with ACPI */
#define HEADER_OFFSET 0
#define HEADER_MASK 0xc0
#define HEADER_SIGNATURE 0x40
#define HEADER_FIRMWARE_SETTINGS_RESET 0x20
#define HEADER_KERNEL_SETTINGS_RESET 0x10
#define BOOT_OFFSET 1
#define BOOT_DEBUG_RESET_MODE 0x80
#define BOOT_DISABLE_DEV_REQUEST 0x40
#define BOOT_DISPLAY_REQUEST 0x20
#define BOOT_TRY_B_COUNT_MASK 0x0f
#define RECOVERY_OFFSET 2
#define LOCALIZATION_OFFSET 3
#define DEV_FLAGS_OFFSET 4
#define DEV_BOOT_USB_MASK 0x01
#define DEV_BOOT_SIGNED_ONLY_MASK 0x02
#define DEV_ENABLE_UDC 0x40
#define MISC_FLAGS_OFFSET 8
#define MISC_FLAGS_BATTERY_CUTOFF_MASK 0x08
#define KERNEL_FIELD_OFFSET 11
#define CRC_OFFSET 15
#endif /* __ASM_ACPI_VBNV_LAYOUT_H__ */