4 * Copyright (C) 2008 Jordan Crouse <jordan@cosmicpenguin.net>
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License as published by
8 * the Free Software Foundation; version 2 of the License.
10 * This program is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 * GNU General Public License for more details.
15 * You should have received a copy of the GNU General Public License
16 * along with this program; if not, write to the Free Software
17 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA, 02110-1301 USA
23 /** These are standard values for the known compression
24 alogrithms that coreboot knows about for stages and
25 payloads. Of course, other LAR users can use whatever
26 values they want, as long as they understand them. */
28 #define CBFS_COMPRESS_NONE 0
29 #define CBFS_COMPRESS_LZMA 1
30 #define CBFS_COMPRESS_NRV2B 2
32 /** These are standard component types for well known
33 components (i.e - those that coreboot needs to consume.
34 Users are welcome to use any other value for their
37 #define CBFS_COMPONENT_STAGE 0x10
38 #define CBFS_COMPONENT_PAYLOAD 0x20
39 #define CBFS_COMPONENT_OPTIONROM 0x30
41 /* The deleted type is chosen to be a value
42 * that can be written in a FLASH from all other
45 #define CBFS_COMPONENT_DELETED 0
47 /* for all known FLASH, this value can be changed
48 * to all other values. This allows NULL files to be
49 * changed without a block erase
51 #define CBFS_COMPONENT_NULL 0xFFFFFFFF
53 /** this is the master cbfs header - it need to be
54 located somewhere in the bootblock. Where it
55 actually lives is up to coreboot. A pointer to
56 this header will live at 0xFFFFFFF4, so we can
59 #define HEADER_MAGIC 0x4F524243
61 /* this is a version that gives the right answer in any endian-ness */
62 #define VERSION1 0x31313131
68 unsigned int bootblocksize;
72 } __attribute__ ((packed));
74 /** This is a component header - every entry in the CBFS
75 will have this header.
77 This is how the component is arranged in the ROM:
81 -------------- <- sizeof(struct component)
83 -------------- <- offset
86 -------------- <- offset + len
89 #define COMPONENT_MAGIC "LARCHIVE"
95 unsigned int checksum;
97 } __attribute__ ((packed));
99 /*** Component sub-headers ***/
101 /* Following are component sub-headers for the "standard"
104 /** This is the sub-header for stage components. Stages are
105 loaded by coreboot during the normal boot process */
108 unsigned int compression; /** Compression type */
109 unsigned long long entry; /** entry point */
110 unsigned long long load; /** Where to load in memory */
111 unsigned int len; /** length of data to load */
112 unsigned int memlen; /** total length of object in memory */
113 } __attribute__ ((packed));
115 /** this is the sub-header for payload components. Payloads
116 are loaded by coreboot at the end of the boot process */
118 struct cbfs_payload_segment {
120 unsigned int compression;
122 unsigned long long load_addr;
124 unsigned int mem_len;
125 } __attribute__ ((packed));
127 struct cbfs_payload {
128 struct cbfs_payload_segment segments;
131 #define PAYLOAD_SEGMENT_CODE 0x45444F43
132 #define PAYLOAD_SEGMENT_DATA 0x41544144
133 #define PAYLOAD_SEGMENT_BSS 0x20535342
134 #define PAYLOAD_SEGMENT_PARAMS 0x41524150
135 #define PAYLOAD_SEGMENT_ENTRY 0x52544E45
137 #define CBFS_NAME(_c) (((unsigned char *) (_c)) + sizeof(struct cbfs_file))