libpayload: Implement new CBFS access API
This commit adds new CBFS API, which is based on the one available in the main coreboot source tree. Libpayload implementation supports RO/RW file lookups and file contents verification. Change-Id: I00da0658dbac0cddf92ad55611def947932d23c7 Signed-off-by: Jakub Czapiga <jacz@semihalf.com> Reviewed-on: https://review.coreboot.org/c/coreboot/+/59497 Tested-by: build bot (Jenkins) <no-reply@coreboot.org> Reviewed-by: Julius Werner <jwerner@chromium.org>
This commit is contained in:
committed by
Felix Held
parent
1fa3da4d9b
commit
63e54275f6
@@ -1,82 +1,124 @@
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/*
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*
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* Copyright (C) 2008 Jordan Crouse <jordan@cosmicpenguin.net>
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* Copyright (C) 2013 Google, Inc.
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*
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* This file is dual-licensed. You can choose between:
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* - The GNU GPL, version 2, as published by the Free Software Foundation
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* - The revised BSD license (without advertising clause)
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*
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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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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. The name of the author may not be used to endorse or promote products
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* derived from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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* ---------------------------------------------------------------------------
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*/
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/* SPDX-License-Identifier: BSD-3-Clause */
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#ifndef _CBFS_H_
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#define _CBFS_H_
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#include <cbfs_core.h>
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#include <commonlib/bsd/cb_err.h>
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#include <commonlib/bsd/cbfs_mdata.h>
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#include <endian.h>
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#include <stdbool.h>
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/* legacy APIs */
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const struct cbfs_header *get_cbfs_header(void);
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struct cbfs_file *cbfs_find(const char *name);
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void *cbfs_find_file(const char *name, int type);
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int cbfs_execute_stage(struct cbfs_media *media, const char *name);
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void *cbfs_load_optionrom(struct cbfs_media *media, uint16_t vendor,
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uint16_t device);
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void *cbfs_load_payload(struct cbfs_media *media, const char *name);
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void *cbfs_load_stage(struct cbfs_media *media, const char *name);
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/**********************************************************************************************
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* CBFS FILE ACCESS APIs *
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**********************************************************************************************/
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/* Simple buffer for streaming media. */
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struct cbfs_simple_buffer {
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char *buffer;
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size_t allocated;
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size_t size;
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size_t last_allocate;
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};
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/* For documentation look in src/include/cbfs.h file in the main coreboot source tree. */
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void *cbfs_simple_buffer_map(struct cbfs_simple_buffer *buffer,
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struct cbfs_media *media,
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size_t offset, size_t count);
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static inline size_t cbfs_load(const char *name, void *buf, size_t size);
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static inline size_t cbfs_ro_load(const char *name, void *buf, size_t size);
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void *cbfs_simple_buffer_unmap(struct cbfs_simple_buffer *buffer,
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const void *address);
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static inline void *cbfs_map(const char *name, size_t *size_out);
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static inline void *cbfs_ro_map(const char *name, size_t *size_out);
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// Utility functions
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int run_address(void *f);
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void cbfs_unmap(void *mapping);
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/* Defined in individual arch / board implementation. */
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int init_default_cbfs_media(struct cbfs_media *media);
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static inline size_t cbfs_get_size(const char *name);
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static inline size_t cbfs_ro_get_size(const char *name);
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static inline enum cbfs_type cbfs_get_type(const char *name);
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static inline enum cbfs_type cbfs_ro_get_type(const char *name);
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static inline bool cbfs_file_exists(const char *name);
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static inline bool cbfs_ro_file_exists(const char *name);
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/**********************************************************************************************
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* INTERNAL HELPERS FOR INLINES, DO NOT USE. *
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**********************************************************************************************/
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ssize_t _cbfs_boot_lookup(const char *name, bool force_ro, union cbfs_mdata *mdata);
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void *_cbfs_load(const char *name, void *buf, size_t *size_inout, bool force_ro);
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/**********************************************************************************************
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* INLINE IMPLEMENTATIONS *
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**********************************************************************************************/
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static inline void *cbfs_map(const char *name, size_t *size_out)
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{
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return _cbfs_load(name, NULL, size_out, false);
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}
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static inline void *cbfs_ro_map(const char *name, size_t *size_out)
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{
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return _cbfs_load(name, NULL, size_out, true);
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}
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static inline size_t cbfs_load(const char *name, void *buf, size_t size)
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{
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if (_cbfs_load(name, buf, &size, false))
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return size;
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else
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return 0;
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}
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static inline size_t cbfs_ro_load(const char *name, void *buf, size_t size)
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{
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if (_cbfs_load(name, buf, &size, true))
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return size;
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else
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return 0;
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}
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static inline size_t cbfs_get_size(const char *name)
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{
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union cbfs_mdata mdata;
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if (_cbfs_boot_lookup(name, false, &mdata) < 0)
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return 0;
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else
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return be32toh(mdata.h.len);
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}
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static inline size_t cbfs_ro_get_size(const char *name)
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{
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union cbfs_mdata mdata;
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if (_cbfs_boot_lookup(name, true, &mdata) < 0)
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return 0;
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else
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return be32toh(mdata.h.len);
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}
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static inline enum cbfs_type cbfs_get_type(const char *name)
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{
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union cbfs_mdata mdata;
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if (_cbfs_boot_lookup(name, false, &mdata) < 0)
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return CBFS_TYPE_NULL;
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else
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return be32toh(mdata.h.type);
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}
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static inline enum cbfs_type cbfs_ro_get_type(const char *name)
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{
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union cbfs_mdata mdata;
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if (_cbfs_boot_lookup(name, true, &mdata) < 0)
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return CBFS_TYPE_NULL;
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else
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return be32toh(mdata.h.type);
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}
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static inline bool cbfs_file_exists(const char *name)
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{
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union cbfs_mdata mdata;
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return _cbfs_boot_lookup(name, false, &mdata) >= 0;
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}
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static inline bool cbfs_ro_file_exists(const char *name)
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{
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union cbfs_mdata mdata;
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return _cbfs_boot_lookup(name, true, &mdata) >= 0;
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}
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/* Legacy API. Designated for removal in the future. */
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#include <cbfs_legacy.h>
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#endif
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@@ -45,139 +45,14 @@
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#ifndef _CBFS_CORE_H_
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#define _CBFS_CORE_H_
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#include <commonlib/bsd/cbfs_serialized.h>
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#include <endian.h>
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#include <stddef.h>
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#include <stdint.h>
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#include <stdlib.h>
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/** These are standard values for the known compression
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alogrithms that coreboot knows about for stages and
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payloads. Of course, other CBFS users can use whatever
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values they want, as long as they understand them. */
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#define CBFS_COMPRESS_NONE 0
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#define CBFS_COMPRESS_LZMA 1
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#define CBFS_COMPRESS_LZ4 2
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/** These are standard component types for well known
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components (i.e - those that coreboot needs to consume.
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Users are welcome to use any other value for their
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components */
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#define CBFS_TYPE_STAGE 0x10
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#define CBFS_TYPE_SELF 0x20
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#define CBFS_TYPE_FIT 0x21
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#define CBFS_TYPE_OPTIONROM 0x30
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#define CBFS_TYPE_BOOTSPLASH 0x40
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#define CBFS_TYPE_RAW 0x50
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#define CBFS_TYPE_VSA 0x51
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#define CBFS_TYPE_MBI 0x52
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#define CBFS_TYPE_MICROCODE 0x53
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#define CBFS_TYPE_STRUCT 0x70
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#define CBFS_COMPONENT_CMOS_DEFAULT 0xaa
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#define CBFS_COMPONENT_CMOS_LAYOUT 0x01aa
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#define CBFS_HEADER_MAGIC 0x4F524243
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#define CBFS_HEADER_VERSION1 0x31313131
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#define CBFS_HEADER_VERSION2 0x31313132
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#define CBFS_HEADER_VERSION CBFS_HEADER_VERSION2
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#define CBFS_HEADER_INVALID_ADDRESS ((void*)(0xffffffff))
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/* this is the master cbfs header - it must be located somewhere available
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* to bootblock (to load romstage). The last 4 bytes in the image contain its
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* relative offset from the end of the image (as a 32-bit signed integer). */
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struct cbfs_header {
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uint32_t magic;
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uint32_t version;
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uint32_t romsize;
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uint32_t bootblocksize;
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uint32_t align; /* fixed to 64 bytes */
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uint32_t offset;
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uint32_t architecture;
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uint32_t pad[1];
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} __packed;
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/* this used to be flexible, but wasn't ever set to something different. */
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#define CBFS_ALIGNMENT 64
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/* "Unknown" refers to CBFS headers version 1,
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* before the architecture was defined (i.e., x86 only).
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*/
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#define CBFS_ARCHITECTURE_UNKNOWN 0xFFFFFFFF
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#define CBFS_ARCHITECTURE_X86 0x00000001
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#define CBFS_ARCHITECTURE_ARM 0x00000010
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#define CBFS_ARCHITECTURE_ARM64 0x00000011
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/** This is a component header - every entry in the CBFS
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will have this header.
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This is how the component is arranged in the ROM:
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-------------- <- 0
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component header
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-------------- <- sizeof(struct component)
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component name
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-------------- <- offset
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data
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...
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-------------- <- offset + len
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*/
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#define CBFS_FILE_MAGIC "LARCHIVE"
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struct cbfs_file {
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char magic[8];
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uint32_t len;
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uint32_t type;
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uint32_t attributes_offset;
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uint32_t offset;
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char filename[];
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} __packed;
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/* Depending on how the header was initialized, it may be backed with 0x00 or
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* 0xff. Support both. */
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#define CBFS_FILE_ATTR_TAG_UNUSED 0
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#define CBFS_FILE_ATTR_TAG_UNUSED2 0xffffffff
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#define CBFS_FILE_ATTR_TAG_COMPRESSION 0x42435a4c
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#define CBFS_FILE_ATTR_TAG_HASH 0x68736148
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#define CBFS_FILE_ATTR_TAG_IBB 0x32494242 /* Initial BootBlock */
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/* The common fields of extended cbfs file attributes.
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Attributes are expected to start with tag/len, then append their
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specific fields. */
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struct cbfs_file_attribute {
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uint32_t tag;
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/* len covers the whole structure, incl. tag and len */
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uint32_t len;
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uint8_t data[0];
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} __packed;
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struct cbfs_file_attr_compression {
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uint32_t tag;
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uint32_t len;
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/* whole file compression format. 0 if no compression. */
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uint32_t compression;
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uint32_t decompressed_size;
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} __packed;
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struct cbfs_file_attr_hash {
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uint32_t tag;
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uint32_t len;
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uint32_t hash_type;
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/* hash_data is len - sizeof(struct) bytes */
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uint8_t hash_data[];
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} __packed;
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/*** Component sub-headers ***/
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/* Following are component sub-headers for the "standard"
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component types */
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/** This is the sub-header for stage components. Stages are
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loaded by coreboot during the normal boot process */
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struct cbfs_stage {
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uint32_t compression; /** Compression type */
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uint64_t entry; /** entry point */
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@@ -186,33 +61,6 @@ struct cbfs_stage {
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uint32_t memlen; /** total length of object in memory */
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} __packed;
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/** this is the sub-header for payload components. Payloads
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are loaded by coreboot at the end of the boot process */
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struct cbfs_payload_segment {
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uint32_t type;
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uint32_t compression;
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uint32_t offset;
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uint64_t load_addr;
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uint32_t len;
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uint32_t mem_len;
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} __packed;
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struct cbfs_payload {
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struct cbfs_payload_segment segments;
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};
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#define PAYLOAD_SEGMENT_CODE 0x45444F43
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#define PAYLOAD_SEGMENT_DATA 0x41544144
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#define PAYLOAD_SEGMENT_BSS 0x20535342
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#define PAYLOAD_SEGMENT_PARAMS 0x41524150
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#define PAYLOAD_SEGMENT_ENTRY 0x52544E45
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struct cbfs_optionrom {
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uint32_t compression;
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uint32_t len;
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} __packed;
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#define CBFS_MEDIA_INVALID_MAP_ADDRESS ((void*)(0xffffffff))
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#define CBFS_DEFAULT_MEDIA ((void*)(0x0))
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46
payloads/libpayload/include/cbfs_glue.h
Normal file
46
payloads/libpayload/include/cbfs_glue.h
Normal file
@@ -0,0 +1,46 @@
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/* SPDX-License-Identifier: BSD-3-Clause */
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#ifndef _CBFS_CBFS_GLUE_H
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#define _CBFS_CBFS_GLUE_H
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#include <libpayload-config.h>
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#include <boot_device.h>
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#include <stdio.h>
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#define CBFS_ENABLE_HASHING CONFIG(LP_CBFS_VERIFICATION)
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#define ERROR(...) printf("CBFS ERROR: " __VA_ARGS__)
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#define LOG(...) printf("CBFS: " __VA_ARGS__)
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#define DEBUG(...) \
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do { \
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if (CONFIG(LP_DEBUG_CBFS)) \
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printf("CBFS DEBUG: " __VA_ARGS__); \
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} while (0)
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struct cbfs_dev {
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size_t offset;
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size_t size;
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};
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struct cbfs_boot_device {
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struct cbfs_dev dev;
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void *mcache;
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size_t mcache_size;
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};
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typedef const struct cbfs_dev *cbfs_dev_t;
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static inline ssize_t cbfs_dev_read(cbfs_dev_t dev, void *buffer, size_t offset, size_t size)
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{
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if (offset + size < offset || offset + size > dev->size)
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return CB_ERR_ARG;
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return boot_device_read(buffer, dev->offset + offset, size);
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}
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static inline size_t cbfs_dev_size(cbfs_dev_t dev)
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{
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return dev->size;
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}
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#endif /* _CBFS_CBFS_GLUE_H */
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83
payloads/libpayload/include/cbfs_legacy.h
Normal file
83
payloads/libpayload/include/cbfs_legacy.h
Normal file
@@ -0,0 +1,83 @@
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/*
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*
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* Copyright (C) 2008 Jordan Crouse <jordan@cosmicpenguin.net>
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* Copyright (C) 2013 Google, Inc.
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*
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* This file is dual-licensed. You can choose between:
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||||
* - The GNU GPL, version 2, as published by the Free Software Foundation
|
||||
* - The revised BSD license (without advertising clause)
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*
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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
|
||||
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
||||
* GNU General Public License for more details.
|
||||
* ---------------------------------------------------------------------------
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||||
* Redistribution and use in source and binary forms, with or without
|
||||
* modification, are permitted provided that the following conditions
|
||||
* are met:
|
||||
* 1. Redistributions of source code must retain the above copyright
|
||||
* notice, this list of conditions and the following disclaimer.
|
||||
* 2. Redistributions in binary form must reproduce the above copyright
|
||||
* notice, this list of conditions and the following disclaimer in the
|
||||
* documentation and/or other materials provided with the distribution.
|
||||
* 3. The name of the author may not be used to endorse or promote products
|
||||
* derived from this software without specific prior written permission.
|
||||
*
|
||||
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
|
||||
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
||||
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
|
||||
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
|
||||
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
|
||||
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
|
||||
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
|
||||
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
|
||||
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
|
||||
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
|
||||
* SUCH DAMAGE.
|
||||
* ---------------------------------------------------------------------------
|
||||
*/
|
||||
|
||||
#ifndef _CBFS_LEGACY_H_
|
||||
#define _CBFS_LEGACY_H_
|
||||
|
||||
#include <cbfs_core.h>
|
||||
#include <libpayload.h>
|
||||
|
||||
/* legacy APIs */
|
||||
const struct cbfs_header *get_cbfs_header(void);
|
||||
struct cbfs_file *cbfs_find(const char *name);
|
||||
void *cbfs_find_file(const char *name, int type);
|
||||
|
||||
int cbfs_execute_stage(struct cbfs_media *media, const char *name);
|
||||
void *cbfs_load_optionrom(struct cbfs_media *media, uint16_t vendor,
|
||||
uint16_t device);
|
||||
void *cbfs_load_payload(struct cbfs_media *media, const char *name);
|
||||
void *cbfs_load_stage(struct cbfs_media *media, const char *name);
|
||||
|
||||
/* Simple buffer for streaming media. */
|
||||
struct cbfs_simple_buffer {
|
||||
char *buffer;
|
||||
size_t allocated;
|
||||
size_t size;
|
||||
size_t last_allocate;
|
||||
};
|
||||
|
||||
void *cbfs_simple_buffer_map(struct cbfs_simple_buffer *buffer,
|
||||
struct cbfs_media *media,
|
||||
size_t offset, size_t count);
|
||||
|
||||
void *cbfs_simple_buffer_unmap(struct cbfs_simple_buffer *buffer,
|
||||
const void *address);
|
||||
|
||||
// Utility functions
|
||||
int run_address(void *f);
|
||||
|
||||
/* Defined in individual arch / board implementation. */
|
||||
int init_default_cbfs_media(struct cbfs_media *media);
|
||||
|
||||
#endif
|
Reference in New Issue
Block a user