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