| /* |
| * romtool |
| * |
| * Copyright (C) 2008 Jordan Crouse <jordan@cosmicpenguin.net> |
| * |
| * This program is free software; you can redistribute it and/or modify |
| * it under the terms of the GNU General Public License as published by |
| * the Free Software Foundation; version 2 of the License. |
| * |
| * This program is distributed in the hope that it will be useful, |
| * 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. |
| * |
| * You should have received a copy of the GNU General Public License |
| * along with this program; if not, write to the Free Software |
| * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA, 02110-1301 USA |
| */ |
| |
| #ifndef _ROMFS_H_ |
| #define _ROMFS_H_ |
| |
| /** These are standard values for the known compression |
| alogrithms that coreboot knows about for stages and |
| payloads. Of course, other LAR users can use whatever |
| values they want, as long as they understand them. */ |
| |
| #define ROMFS_COMPRESS_NONE 0 |
| #define ROMFS_COMPRESS_LZMA 1 |
| #define ROMFS_COMPRESS_NRV2B 2 |
| |
| /** These are standard component types for well known |
| components (i.e - those that coreboot needs to consume. |
| Users are welcome to use any other value for their |
| components */ |
| |
| #define ROMFS_COMPONENT_STAGE 0x10 |
| #define ROMFS_COMPONENT_PAYLOAD 0x20 |
| #define ROMFS_COMPONENT_OPTIONROM 0x30 |
| |
| #define ROMFS_COMPONENT_NULL 0xFFFFFFFF |
| |
| /** this is the master romfs header - it need to be |
| located somewhere in the bootblock. Where it |
| actually lives is up to coreboot. A pointer to |
| this header will live at 0xFFFFFFF4, so we can |
| easily find it. */ |
| |
| #define HEADER_MAGIC 0x4F524243 |
| |
| /* this is a version that gives the right answer in any endian-ness */ |
| #define VERSION1 0x31313131 |
| |
| struct romfs_header { |
| unsigned int magic; |
| unsigned int version; |
| unsigned int romsize; |
| unsigned int bootblocksize; |
| unsigned int align; |
| unsigned int offset; |
| unsigned int pad[2]; |
| } __attribute__ ((packed)); |
| |
| /** This is a component header - every entry in the ROMFS |
| will have this header. |
| |
| This is how the component is arranged in the ROM: |
| |
| -------------- <- 0 |
| component header |
| -------------- <- sizeof(struct component) |
| component name |
| -------------- <- offset |
| data |
| ... |
| -------------- <- offset + len |
| */ |
| |
| #define COMPONENT_MAGIC "LARCHIVE" |
| |
| struct romfs_file { |
| char magic[8]; |
| unsigned int len; |
| unsigned int type; |
| unsigned int checksum; |
| unsigned int offset; |
| } __attribute__ ((packed)); |
| |
| /*** Component sub-headers ***/ |
| |
| /* Following are component sub-headers for the "standard" |
| component types */ |
| |
| /** This is the sub-header for stage components. Stages are |
| loaded by coreboot during the normal boot process */ |
| |
| struct romfs_stage { |
| unsigned int compression; /** Compression type */ |
| unsigned long long entry; /** entry point */ |
| unsigned long long load; /** Where to load in memory */ |
| unsigned int len; /** length of data to load */ |
| unsigned int memlen; /** total length of object in memory */ |
| } __attribute__ ((packed)); |
| |
| /** this is the sub-header for payload components. Payloads |
| are loaded by coreboot at the end of the boot process */ |
| |
| struct romfs_payload_segment { |
| unsigned int type; |
| unsigned int compression; |
| unsigned int offset; |
| unsigned long long load_addr; |
| unsigned int len; |
| unsigned int mem_len; |
| } __attribute__ ((packed)); |
| |
| struct romfs_payload { |
| struct romfs_payload_segment segments; |
| }; |
| |
| #define PAYLOAD_SEGMENT_CODE 0x45444F43 |
| #define PAYLOAD_SEGMENT_DATA 0x41544144 |
| #define PAYLOAD_SEGMENT_BSS 0x20535342 |
| #define PAYLOAD_SEGMENT_PARAMS 0x41524150 |
| #define PAYLOAD_SEGMENT_ENTRY 0x52544E45 |
| |
| #define ROMFS_NAME(_c) (((unsigned char *) (_c)) + sizeof(struct romfs_file)) |
| |
| #endif |