diff options
| -rw-r--r-- | MdePkg/Include/IndustryStandard/ElTorito.h | 57 |
1 files changed, 40 insertions, 17 deletions
diff --git a/MdePkg/Include/IndustryStandard/ElTorito.h b/MdePkg/Include/IndustryStandard/ElTorito.h index 60b7a21..b474dc9 100644 --- a/MdePkg/Include/IndustryStandard/ElTorito.h +++ b/MdePkg/Include/IndustryStandard/ElTorito.h @@ -1,7 +1,11 @@ /** @file
- ElTorito Partitions Format Definition.
+ ElTorito Partitions Format Definition.
+ This file includes some defintions 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, Intel Corporation
+Copyright (c) 2006 - 2008, 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
@@ -15,9 +19,9 @@ WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED. #ifndef _ELTORITO_H_
#define _ELTORITO_H_
-//
-// CDROM_VOLUME_DESCRIPTOR.Types
-//
+///
+/// CDROM_VOLUME_DESCRIPTOR.Types, defined in ISO 9660
+///
#define CDVOL_TYPE_STANDARD 0x0
#define CDVOL_TYPE_CODED 0x1
#define CDVOL_TYPE_END 0xFF
@@ -53,24 +57,43 @@ WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED. #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;
+///
+typedef union {
+ struct {
+ UINT8 Type;
+ CHAR8 Id[5]; ///< "CD001"
+ CHAR8 Reserved[82];
+ } Unknown;
+
+ 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;
+
+ 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
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