130 lines
3.7 KiB
C
130 lines
3.7 KiB
C
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/*
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* romtool
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*
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* Copyright (C) 2008 Jordan Crouse <jordan@cosmicpenguin.net>
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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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#ifndef _ROMFS_H_
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#define _ROMFS_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 LAR users can use whatever
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values they want, as long as they understand them. */
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#define ROMFS_COMPRESS_NONE 0
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#define ROMFS_COMPRESS_LZMA 1
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#define ROMFS_COMPRESS_NRV2B 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 ROMFS_COMPONENT_STAGE 0x10
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#define ROMFS_COMPONENT_PAYLOAD 0x20
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#define ROMFS_COMPONENT_OPTIONROM 0x30
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#define ROMFS_COMPONENT_NULL 0xFFFFFFFF
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/** this is the master romfs 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. A pointer to
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this header will live at 0xFFFFFFF4, so we can
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easily find it. */
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#define HEADER_MAGIC 0x4F524243
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/* this is a version that gives the right answer in any endian-ness */
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#define VERSION1 0x31313131
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struct romfs_header {
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unsigned int magic;
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unsigned int version;
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unsigned int romsize;
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unsigned int bootblocksize;
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unsigned int align;
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unsigned int offset;
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unsigned int pad[2];
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} __attribute__ ((packed));
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/** This is a component header - every entry in the ROMFS
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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 COMPONENT_MAGIC "LARCHIVE"
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struct romfs_file {
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char magic[8];
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unsigned int len;
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unsigned int type;
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unsigned int checksum;
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unsigned int 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 romfs_stage {
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unsigned int compression; /** Compression type */
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unsigned long long entry; /** entry point */
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unsigned long long load; /** Where to load in memory */
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unsigned int len; /** length of data to load */
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unsigned int 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 romfs_payload_segment {
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unsigned int type;
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unsigned int compression;
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unsigned int offset;
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unsigned long long load_addr;
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unsigned int len;
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unsigned int mem_len;
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} __attribute__ ((packed));
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struct romfs_payload {
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struct romfs_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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#define ROMFS_NAME(_c) (((unsigned char *) (_c)) + sizeof(struct romfs_file))
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#endif
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