137 lines
3.5 KiB
C
137 lines
3.5 KiB
C
/* SPDX-License-Identifier: GPL-2.0-only or BSD-3-Clause */
|
|
|
|
#ifndef _CBFS_H_
|
|
#define _CBFS_H_
|
|
|
|
#include "coreboot_tables.h"
|
|
|
|
typedef uint64_t u64;
|
|
typedef uint32_t u32;
|
|
typedef uint16_t u16;
|
|
typedef uint8_t u8;
|
|
|
|
/** These are standard values for the known compression
|
|
algorithms that coreboot knows about for stages and
|
|
payloads. Of course, other CBFS users can use whatever
|
|
values they want, as long as they understand them. */
|
|
|
|
#define CBFS_COMPRESS_NONE 0
|
|
#define CBFS_COMPRESS_LZMA 1
|
|
#define CBFS_COMPRESS_LZ4 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 CBFS_TYPE_STAGE 0x10
|
|
#define CBFS_TYPE_SELF 0x20
|
|
#define CBFS_TYPE_FIT 0x21
|
|
#define CBFS_TYPE_OPTIONROM 0x30
|
|
#define CBFS_TYPE_BOOTSPLASH 0x40
|
|
#define CBFS_TYPE_RAW 0x50
|
|
#define CBFS_TYPE_VSA 0x51
|
|
#define CBFS_TYPE_MBI 0x52
|
|
#define CBFS_TYPE_MICROCODE 0x53
|
|
#define CBFS_COMPONENT_CMOS_DEFAULT 0xaa
|
|
#define CBFS_COMPONENT_CMOS_LAYOUT 0x01aa
|
|
|
|
|
|
/** this is the master cbfs 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 0xFFFFFFFc, so we can
|
|
easily find it. */
|
|
|
|
#define CBFS_HEADER_MAGIC 0x4F524243
|
|
#define CBFS_HEADPTR_ADDR 0xFFFFFFFc
|
|
#define CBFS_HEADER_VERSION1 0x31313131
|
|
|
|
struct cbfs_header {
|
|
u32 magic;
|
|
u32 version;
|
|
u32 romsize;
|
|
u32 bootblocksize;
|
|
u32 align;
|
|
u32 offset;
|
|
u32 pad[2];
|
|
} __attribute__((packed));
|
|
|
|
/** This is a component header - every entry in the CBFS
|
|
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 CBFS_FILE_MAGIC "LARCHIVE"
|
|
|
|
struct cbfs_file {
|
|
char magic[8];
|
|
u32 len;
|
|
u32 type;
|
|
u32 checksum;
|
|
u32 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 cbfs_stage {
|
|
u32 compression; /** Compression type */
|
|
u64 entry; /** entry point */
|
|
u64 load; /** Where to load in memory */
|
|
u32 len; /** length of data to load */
|
|
u32 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 cbfs_payload_segment {
|
|
u32 type;
|
|
u32 compression;
|
|
u32 offset;
|
|
u64 load_addr;
|
|
u32 len;
|
|
u32 mem_len;
|
|
} __attribute__((packed));
|
|
|
|
struct cbfs_payload {
|
|
struct cbfs_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
|
|
|
|
struct cbfs_optionrom {
|
|
u32 compression;
|
|
u32 len;
|
|
} __attribute__((packed));
|
|
|
|
#define CBFS_NAME(_c) (((char *) (_c)) + sizeof(struct cbfs_file))
|
|
#define CBFS_SUBHEADER(_p) ( (void *) ((((u8 *) (_p)) + ntohl((_p)->offset))) )
|
|
|
|
void * cbfs_get_file(const char *name);
|
|
struct cbfs_file *cbfs_find(const char *name);
|
|
void *cbfs_find_file(const char *name, unsigned int type, unsigned int *len);
|
|
|
|
void open_cbfs(const char *filename);
|
|
#endif
|