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