mirror of https://github.com/ipxe/ipxe.git
104 lines
2.2 KiB
C
104 lines
2.2 KiB
C
#ifndef _IPXE_ELTORITO_H
|
|
#define _IPXE_ELTORITO_H
|
|
|
|
/**
|
|
* @file
|
|
*
|
|
* El Torito bootable CD-ROM specification
|
|
*
|
|
*/
|
|
|
|
FILE_LICENCE ( GPL2_OR_LATER_OR_UBDL );
|
|
|
|
#include <stdint.h>
|
|
#include <ipxe/iso9660.h>
|
|
|
|
/** An El Torito Boot Record Volume Descriptor (fixed portion) */
|
|
struct eltorito_descriptor_fixed {
|
|
/** Descriptor type */
|
|
uint8_t type;
|
|
/** Identifier ("CD001") */
|
|
uint8_t id[5];
|
|
/** Version, must be 1 */
|
|
uint8_t version;
|
|
/** Boot system indicator; must be "EL TORITO SPECIFICATION" */
|
|
uint8_t system_id[32];
|
|
} __attribute__ (( packed ));
|
|
|
|
/** An El Torito Boot Record Volume Descriptor */
|
|
struct eltorito_descriptor {
|
|
/** Fixed portion */
|
|
struct eltorito_descriptor_fixed fixed;
|
|
/** Unused */
|
|
uint8_t unused[32];
|
|
/** Boot catalog sector */
|
|
uint32_t sector;
|
|
} __attribute__ (( packed ));
|
|
|
|
/** El Torito Boot Record Volume Descriptor block address */
|
|
#define ELTORITO_LBA 17
|
|
|
|
/** An El Torito Boot Catalog Validation Entry */
|
|
struct eltorito_validation_entry {
|
|
/** Header ID; must be 1 */
|
|
uint8_t header_id;
|
|
/** Platform ID
|
|
*
|
|
* 0 = 80x86
|
|
* 1 = PowerPC
|
|
* 2 = Mac
|
|
*/
|
|
uint8_t platform_id;
|
|
/** Reserved */
|
|
uint16_t reserved;
|
|
/** ID string */
|
|
uint8_t id_string[24];
|
|
/** Checksum word */
|
|
uint16_t checksum;
|
|
/** Signature; must be 0xaa55 */
|
|
uint16_t signature;
|
|
} __attribute__ (( packed ));
|
|
|
|
/** El Torito platform IDs */
|
|
enum eltorito_platform_id {
|
|
ELTORITO_PLATFORM_X86 = 0x00,
|
|
ELTORITO_PLATFORM_POWERPC = 0x01,
|
|
ELTORITO_PLATFORM_MAC = 0x02,
|
|
};
|
|
|
|
/** A bootable entry in the El Torito Boot Catalog */
|
|
struct eltorito_boot_entry {
|
|
/** Boot indicator
|
|
*
|
|
* Must be @c ELTORITO_BOOTABLE for a bootable ISO image
|
|
*/
|
|
uint8_t indicator;
|
|
/** Media type
|
|
*
|
|
*/
|
|
uint8_t media_type;
|
|
/** Load segment */
|
|
uint16_t load_segment;
|
|
/** System type */
|
|
uint8_t filesystem;
|
|
/** Unused */
|
|
uint8_t reserved_a;
|
|
/** Sector count */
|
|
uint16_t length;
|
|
/** Starting sector */
|
|
uint32_t start;
|
|
/** Unused */
|
|
uint8_t reserved_b[20];
|
|
} __attribute__ (( packed ));
|
|
|
|
/** Boot indicator for a bootable ISO image */
|
|
#define ELTORITO_BOOTABLE 0x88
|
|
|
|
/** El Torito media types */
|
|
enum eltorito_media_type {
|
|
/** No emulation */
|
|
ELTORITO_NO_EMULATION = 0,
|
|
};
|
|
|
|
#endif /* _IPXE_ELTORITO_H */
|