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