/* 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. */ #ifdef VB2_X86_RSA_ACCELERATION #define VB2_FIRMWARE_WORKBUF_RECOMMENDED_SIZE (20 * 1024) #else #define VB2_FIRMWARE_WORKBUF_RECOMMENDED_SIZE (12 * 1024) #endif /* * 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 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_ */