src/security/vboot/vbnv_layout.h

/* SPDX-License-Identifier: GPL-2.0-only */

#ifndef __VBOOT_VBNV_LAYOUT_H__
#define __VBOOT_VBNV_LAYOUT_H__

#define VBOOT_VBNV_BLOCK_SIZE 16	/* Size of NV storage block in bytes */

/* Constants for NV storage.  We use this rather than structs and
 * bitfields so the data format is consistent across platforms and
 * compilers.
 */
#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 /* __VBOOT_VBNV_LAYOUT_H__ */