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/** @file
ElTorito Partitions Format Definition.
Copyright (c) 2006, Intel Corporation
All rights reserved. This program and the accompanying materials
are licensed and made available under the terms and conditions of the BSD License
which accompanies this distribution. The full text of the license may be found at
http://opensource.org/licenses/bsd-license.php
THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
--*/
#ifndef _ELTORITO_H_
#define _ELTORITO_H_
//
// CDROM_VOLUME_DESCRIPTOR.Types
//
#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)
///
/// El Torito Volume Descriptor
/// Note that the CDROM_VOLUME_DESCRIPTOR does not match the ISO-9660
/// descriptor. For some reason descriptor used by El Torito is
/// different, but they start the same. The El Torito descriptor
/// is left shifted 1 byte starting with the SystemId. (Note this
/// causes the field to get unaligned)
///
typedef struct {
UINT8 Type;
CHAR8 Id[5]; // CD001
UINT8 Version;
CHAR8 SystemId[26];
CHAR8 Unused[38];
UINT8 EltCatalog[4];
CHAR8 Unused2[5];
UINT32 VolSpaceSize[2];
} CDROM_VOLUME_DESCRIPTOR;
///
/// Catalog Entry
///
typedef union {
struct {
CHAR8 Reserved[0x20];
} Unknown;
///
/// Catalog validation entry (Catalog header)
///
struct {
UINT8 Indicator;
UINT8 PlatformId;
UINT16 Reserved;
CHAR8 ManufacId[24];
UINT16 Checksum;
UINT16 Id55AA;
} Catalog;
///
/// Initial/Default Entry or Section Entry
///
struct {
UINT8 Indicator;
UINT8 MediaType : 4;
UINT8 Reserved1 : 4;
UINT16 LoadSegment;
UINT8 SystemType;
UINT8 Reserved2;
UINT16 SectorCount;
UINT32 Lba;
} Boot;
///
/// Section Header Entry
///
struct {
UINT8 Indicator;
UINT8 PlatformId;
UINT16 SectionEntries;
CHAR8 Id[28];
} Section;
} ELTORITO_CATALOG;
#pragma pack()
#endif
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