194 lines
6.6 KiB
C
194 lines
6.6 KiB
C
/*
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* This file is part of the coreboot project.
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*
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* Copyright (C) 2008 Jordan Crouse <jordan@cosmicpenguin.net>
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* Copyright (C) 2012 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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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA, 02110-1301 USA
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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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#ifndef _CBFS_CORE_H_
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#define _CBFS_CORE_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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/** 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_PAYLOAD 0x20
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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_COMPONENT_CMOS_DEFAULT 0xaa
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#define CBFS_COMPONENT_CMOS_LAYOUT 0x01aa
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/** this is the master cbfs header - it need to be
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located somewhere in the bootblock. Where it
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actually lives is up to coreboot. On x86, a
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pointer to this header will live at 0xFFFFFFFC,
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so we can easily find it. */
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#define CBFS_HEADER_MAGIC 0x4F524243
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#if CONFIG_ARCH_X86
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#define CBFS_HEADPTR_ADDR 0xFFFFFFFC
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#endif
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#define VERSION1 0x31313131
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#define VERSION2 0x31313132
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#define VERSION VERSION2
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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;
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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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} __attribute__((packed));
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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_ARMV7 0x00000010
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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 checksum;
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uint32_t offset;
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} __attribute__((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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uint64_t load; /** Where to load in memory */
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uint32_t len; /** length of data to load */
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uint32_t memlen; /** total length of object in memory */
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} __attribute__((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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} __attribute__((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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} __attribute__((packed));
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#define CBFS_NAME(_c) (((char *) (_c)) + sizeof(struct cbfs_file))
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#define CBFS_SUBHEADER(_p) ( (void *) ((((uint8_t *) (_p)) + ntohl((_p)->offset))) )
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/* returns pointer to file inside CBFS or NULL */
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struct cbfs_file *cbfs_find(const char *name);
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/* returns pointer to file data inside CBFS */
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void *cbfs_get_file(const char *name);
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/* returns pointer to file data inside CBFS after if type is correct */
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void *cbfs_find_file(const char *name, int type);
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/* returns 0 on success, -1 on failure */
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int cbfs_decompress(int algo, void *src, void *dst, int len);
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struct cbfs_header *get_cbfs_header(void);
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#endif
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