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/*
* Firmware Interface Table support.
*
* Copyright (C) 2012 Google Inc.
* Copyright (C) 2019 9elements Agency GmbH
* Copyright (C) 2019 Facebook Inc.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; version 2 of the License.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*/
#ifndef __CBFSTOOL_FIT_H
#define __CBFSTOOL_FIT_H
#include "cbfs_image.h"
#include "common.h"
/**
* Based on "Intel Trusted Execution Technology (Intel TXT) LAB Handout" and
* https://github.com/slimbootloader/slimbootloader/
*/
enum fit_type {
FIT_TYPE_HEADER = 0,
FIT_TYPE_MICROCODE = 1,
FIT_TYPE_BIOS_ACM = 2,
FIT_TYPE_BIOS_STARTUP = 7,
FIT_TYPE_TPM_POLICY = 8,
FIT_TYPE_BIOS_POLICY = 9,
FIT_TYPE_TXT_POLICY = 0xa,
FIT_TYPE_KEY_MANIFEST = 0xb,
FIT_TYPE_BOOT_POLICY = 0xc,
FIT_TYPE_CSE_SECURE_BOOT = 0x10,
FIT_TYPE_TXTSX_POLICY = 0x2d,
FIT_TYPE_JMP_DEBUG_POLICY = 0x2f,
FIT_TYPE_UNUSED = 127,
};
/*
* Converts between offsets from the start of the specified image region and
* "top-aligned" offsets from the top of the entire flash image. Should work in
* both directions: accepts either type of offset and produces the other type.
* The implementation must have some notion of the flash image's total size.
*/
typedef unsigned (*fit_offset_converter_t)(const struct buffer *region,
unsigned offset);
struct fit_table;
struct fit_table *fit_get_table(struct buffer *bootblock,
fit_offset_converter_t offset_fn,
uint32_t topswap_size);
int fit_dump(struct fit_table *fit);
int fit_clear_table(struct fit_table *fit);
int fit_is_supported_type(const enum fit_type type);
int fit_add_entry(struct fit_table *fit,
const uint32_t offset,
const uint32_t len,
const enum fit_type type,
const size_t max_fit_entries);
int fit_delete_entry(struct fit_table *fit,
const size_t idx);
int fit_add_microcode_file(struct fit_table *fit,
struct cbfs_image *image,
const char *blob_name,
fit_offset_converter_t offset_helper,
const size_t max_fit_entries);
#endif
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