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/** @file
ElTorito Partitions Format Definition.
This file includes some definitions from
1. "El Torito" Bootable CD-ROM Format Specification, Version 1.0.
2. Volume and File Structure of CDROM for Information Interchange,
Standard ECMA-119. (IS0 9660)
Copyright (c) 2006 - 2018, Intel Corporation. All rights reserved.<BR>
SPDX-License-Identifier: BSD-2-Clause-Patent
**/
#ifndef _ELTORITO_H_
#define _ELTORITO_H_
//
// CDROM_VOLUME_DESCRIPTOR.Types, defined in ISO 9660
//
#define CDVOL_TYPE_STANDARD 0x0
#define CDVOL_TYPE_CODED 0x1
#define CDVOL_TYPE_END 0xFF
///
/// CDROM_VOLUME_DESCRIPTOR.Id
///
#define CDVOL_ID "CD001"
///
/// CDROM_VOLUME_DESCRIPTOR.SystemId
///
#define CDVOL_ELTORITO_ID "EL TORITO SPECIFICATION"
//
// Indicator types
//
#define ELTORITO_ID_CATALOG 0x01
#define ELTORITO_ID_SECTION_BOOTABLE 0x88
#define ELTORITO_ID_SECTION_NOT_BOOTABLE 0x00
#define ELTORITO_ID_SECTION_HEADER 0x90
#define ELTORITO_ID_SECTION_HEADER_FINAL 0x91
//
// ELTORITO_CATALOG.Boot.MediaTypes
//
#define ELTORITO_NO_EMULATION 0x00
#define ELTORITO_12_DISKETTE 0x01
#define ELTORITO_14_DISKETTE 0x02
#define ELTORITO_28_DISKETTE 0x03
#define ELTORITO_HARD_DISK 0x04
#pragma pack(1)
///
/// CD-ROM Volume Descriptor
///
typedef union {
struct {
UINT8 Type;
CHAR8 Id[5]; ///< "CD001"
CHAR8 Reserved[82];
} Unknown;
///
/// Boot Record Volume Descriptor, defined in "El Torito" Specification.
///
struct {
UINT8 Type; ///< Must be 0
CHAR8 Id[5]; ///< "CD001"
UINT8 Version; ///< Must be 1
CHAR8 SystemId[32]; ///< "EL TORITO SPECIFICATION"
CHAR8 Unused[32]; ///< Must be 0
UINT8 EltCatalog[4]; ///< Absolute pointer to first sector of Boot Catalog
CHAR8 Unused2[13]; ///< Must be 0
} BootRecordVolume;
///
/// Primary Volume Descriptor, defined in ISO 9660.
///
struct {
UINT8 Type;
CHAR8 Id[5]; ///< "CD001"
UINT8 Version;
UINT8 Unused; ///< Must be 0
CHAR8 SystemId[32];
CHAR8 VolumeId[32];
UINT8 Unused2[8]; ///< Must be 0
UINT32 VolSpaceSize[2]; ///< the number of Logical Blocks
} PrimaryVolume;
} CDROM_VOLUME_DESCRIPTOR;
///
/// Catalog Entry
///
typedef union {
struct {
CHAR8 Reserved[0x20];
} Unknown;
///
/// Catalog validation entry (Catalog header)
///
struct {
UINT8 Indicator; ///< Must be 01
UINT8 PlatformId;
UINT16 Reserved;
CHAR8 ManufacId[24];
UINT16 Checksum;
UINT16 Id55AA;
} Catalog;
///
/// Initial/Default Entry or Section Entry
///
struct {
UINT8 Indicator; ///< 88 = Bootable, 00 = Not Bootable
UINT8 MediaType : 4;
UINT8 Reserved1 : 4; ///< Must be 0
UINT16 LoadSegment;
UINT8 SystemType;
UINT8 Reserved2; ///< Must be 0
UINT16 SectorCount;
UINT32 Lba;
} Boot;
///
/// Section Header Entry
///
struct {
UINT8 Indicator; ///< 90 - Header, more header follw, 91 - Final Header
UINT8 PlatformId;
UINT16 SectionEntries; ///< Number of section entries following this header
CHAR8 Id[28];
} Section;
} ELTORITO_CATALOG;
#pragma pack()
#endif
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