mirror of https://github.com/acidanthera/audk.git
131 lines
3.1 KiB
C
131 lines
3.1 KiB
C
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/*++
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Copyright (c) 2006, Intel Corporation
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All rights reserved. This program and the accompanying materials
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are licensed and made available under the terms and conditions of the BSD License
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which accompanies this distribution. The full text of the license may be found at
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http://opensource.org/licenses/bsd-license.php
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THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
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WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
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Module Name:
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ElTorito.h
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Abstract:
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Data Structures required for detecting ElTorito Partitions
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Revision History
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--*/
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#ifndef _ELTORITO_H_
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#define _ELTORITO_H_
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#pragma pack(1)
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//
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// CDROM_VOLUME_DESCRIPTOR.Types
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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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//
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// El Torito Volume Descriptor
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// Note that the CDROM_VOLUME_DESCRIPTOR does not match the ISO-9660
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// descriptor. For some reason descriptor used by El Torito is
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// different, but they start the same. The El Torito descriptor
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// is left shifted 1 byte starting with the SystemId. (Note this
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// causes the field to get unaligned)
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//
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typedef 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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CHAR8 SystemId[26];
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CHAR8 Unused[38];
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UINT8 EltCatalog[4];
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CHAR8 Unused2[5];
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UINT32 VolSpaceSize[2];
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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;
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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;
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UINT8 MediaType : 4;
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UINT8 Reserved1 : 4;
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UINT16 LoadSegment;
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UINT8 SystemType;
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UINT8 Reserved2;
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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;
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UINT8 PlatformId;
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UINT16 SectionEntries;
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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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