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/* Copyright 2019 The ChromiumOS Authors
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
*
* General vboot-related constants.
*
* Constants that need to be exposed to assembly files or linker scripts
* may be placed here and imported via vb2_constants.h.
*/
#ifndef VBOOT_REFERENCE_2CONSTANTS_H_
#define VBOOT_REFERENCE_2CONSTANTS_H_
/*
* Size of non-volatile data used by vboot.
*
* If you only support non-volatile data format V1, then use VB2_NVDATA_SIZE.
* If you support V2, use VB2_NVDATA_SIZE_V2 and set context flag
* VB2_CONTEXT_NVDATA_V2.
*/
#define VB2_NVDATA_SIZE 16
#define VB2_NVDATA_SIZE_V2 64
/* Size of secure data spaces used by vboot */
#define VB2_SECDATA_FIRMWARE_SIZE 10
#define VB2_SECDATA_KERNEL_SIZE_V02 13
#define VB2_SECDATA_KERNEL_SIZE_V10 40
#define VB2_SECDATA_KERNEL_MIN_SIZE 13
#define VB2_SECDATA_KERNEL_MAX_SIZE 64
#define VB2_SECDATA_FWMP_MIN_SIZE 40
#define VB2_SECDATA_FWMP_MAX_SIZE 64
/* Size of current secdata_kernel revision. Referenced by external projects. */
#define VB2_SECDATA_KERNEL_SIZE VB2_SECDATA_KERNEL_SIZE_V10
/*
* Recommended size of work buffer for firmware verification stage.
*
* TODO: The recommended size really depends on which key algorithms are
* used. Should have a better / more accurate recommendation than this.
*/
#define VB2_FIRMWARE_WORKBUF_RECOMMENDED_SIZE (12 * 1024)
/*
* Recommended size of work buffer for kernel verification stage.
*
* This is bigger because vboot 2.0 kernel preambles are usually padded to
* 64 KB.
*
* TODO: The recommended size really depends on which key algorithms are
* used. Should have a better / more accurate recommendation than this.
*/
#define VB2_KERNEL_WORKBUF_RECOMMENDED_SIZE (80 * 1024)
/* Recommended buffer size for vb2api_get_pcr_digest. */
#define VB2_PCR_DIGEST_RECOMMENDED_SIZE 32
/*
* Alignment for work buffer pointers/allocations should be useful for any
* data type. When declaring workbuf buffers on the stack, the caller should
* use explicit alignment to avoid run-time errors. For example:
*
* int foo(void)
* {
* struct vb2_workbuf wb;
* uint8_t buf[NUM] __attribute__((aligned(VB2_WORKBUF_ALIGN)));
* wb.buf = buf;
* wb.size = sizeof(buf);
*/
/* We want consistent alignment across all architectures.
8-byte should work for all of them. */
#define VB2_WORKBUF_ALIGN 8
/* Maximum length of a HWID in bytes, counting terminating null. */
#define VB2_GBB_HWID_MAX_SIZE 256
/* Type and offset of flags member in vb2_gbb_header struct. */
#define VB2_GBB_FLAGS_OFFSET 12
#ifndef __ASSEMBLER__
#include <stdint.h>
typedef uint32_t vb2_gbb_flags_t;
/*
* We use disk handles rather than indices. Using indices causes problems if
* a disk is removed/inserted in the middle of processing.
*
* TODO(b/181739551): move this to 2api.h when the VbExDisk* functions are
* removed from vboot_api.h.
*/
typedef void *vb2ex_disk_handle_t;
#endif
/* Size of legacy VbSharedDataHeader struct. Defined here to avoid including
the struct definition as part of a vb2_api.h include. */
#define VB2_VBSD_SIZE 1096
#endif /* VBOOT_REFERENCE_2CONSTANTS_H_ */
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