121 lines
2.7 KiB
C
121 lines
2.7 KiB
C
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/*++
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Copyright (c) 1999 Microsoft Corporation
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Module Name:
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efi.h
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Abstract:
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On-disk Data types for EFI disks. See chapter 16 of the "Extensible
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Firmware Interface Specification" for more information on these data
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types.
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Author:
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Matthew D Hendel (math) 07-Sept-1999
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Revision History:
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--*/
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#pragma once
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#include <pshpack1.h>
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#define EFI_PARTITION_TABLE_SIGNATURE (0x5452415020494645)
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#define EFI_PARTITION_TABLE_REVISION (0x0010000)
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//
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// This is the PartitionType in the boot record for an EFI-partitioned disk.
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//
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#define EFI_MBR_PARTITION_TYPE (0xEE)
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typedef struct _EFI_PARTITION_ENTRY {
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GUID PartitionType;
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GUID UniquePartition;
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ULONG64 StartingLBA;
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ULONG64 EndingLBA;
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ULONG64 Attributes;
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WCHAR Name [36];
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} EFI_PARTITION_ENTRY, *PEFI_PARTITION_ENTRY;
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//
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// Sanity Check: Since this is an on-disk structure defined in a specification
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// the fields can never move or change size.
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//
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C_ASSERT (
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FIELD_OFFSET (EFI_PARTITION_ENTRY, UniquePartition) == 16 &&
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FIELD_OFFSET (EFI_PARTITION_ENTRY, Name) == 56 &&
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sizeof (EFI_PARTITION_ENTRY) == 128);
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typedef struct _EFI_PARTITION_HEADER {
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ULONG64 Signature;
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ULONG32 Revision;
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ULONG32 HeaderSize;
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ULONG32 HeaderCRC32;
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ULONG32 Reserved;
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ULONG64 MyLBA;
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ULONG64 AlternateLBA;
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ULONG64 FirstUsableLBA;
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ULONG64 LastUsableLBA;
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GUID DiskGUID;
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ULONG64 PartitionEntryLBA;
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ULONG32 NumberOfEntries;
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ULONG32 SizeOfPartitionEntry;
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ULONG32 PartitionEntryCRC32;
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} EFI_PARTITION_HEADER, *PEFI_PARTITION_HEADER;
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//
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// Sanity Check: Since the partition table header is a well-defined on-disk
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// structure, it's fields and offsets can never change. Make sure this is
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// the case.
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//
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C_ASSERT (
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FIELD_OFFSET (EFI_PARTITION_HEADER, Revision) == 8 &&
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FIELD_OFFSET (EFI_PARTITION_HEADER, PartitionEntryCRC32) == 88);
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typedef struct _MBR_PARTITION_RECORD {
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UCHAR BootIndicator;
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UCHAR StartHead;
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UCHAR StartSector;
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UCHAR StartTrack;
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UCHAR OSIndicator;
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UCHAR EndHead;
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UCHAR EndSector;
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UCHAR EndTrack;
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ULONG32 StartingLBA;
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ULONG32 SizeInLBA;
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} MBR_PARTITION_RECORD;
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#define MBR_SIGNATURE 0xaa55
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#define MIN_MBR_DEVICE_SIZE 0x80000
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#define MBR_ERRATA_PAD 0x40000 // 128 MB
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#define MAX_MBR_PARTITIONS 4
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typedef struct _MASTER_BOOT_RECORD {
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UCHAR BootStrapCode[440];
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ULONG DiskSignature;
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USHORT Unused;
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MBR_PARTITION_RECORD Partition[MAX_MBR_PARTITIONS];
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USHORT Signature;
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} MASTER_BOOT_RECORD, *PMASTER_BOOT_RECORD;
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C_ASSERT (sizeof (MASTER_BOOT_RECORD) == 512);
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#include <poppack.h>
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