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- Add hal.h from TinyKRNL containing internal definitions for fstub (MBR, Partiton Table, Partition Table Entry, Layout structures) and helper macros. Some structures come from disk.sys sample in the DDK.

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svn path=/trunk/; revision=24687
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Alex Ionescu 2006-11-05 20:44:38 +00:00
parent 3065170214
commit 8be06d0e3b
1 changed files with 108 additions and 0 deletions
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108
reactos/ntoskrnl/include/internal/hal.h Normal file
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/*
* PROJECT: ReactOS Kernel
* LICENSE: GPL - See COPYING in the top level directory
* FILE: ntoskrnl/include/hal.h
* PURPOSE: Internal header for the I/O HAL Functions (Fstub)
* PROGRAMMERS: Alex Ionescu (alex.ionescu@reactos.org)
*/
#ifndef _HAL_
#define _HAL_
//
// Various offsets in the boot record
//
#define PARTITION_TABLE_OFFSET (0x1BE / 2)
#define BOOT_SIGNATURE_OFFSET ((0x200 / 2) - 1)
#define BOOT_RECORD_RESERVED 0x1BC
#define BOOT_RECORD_SIGNATURE 0xAA55
#define NUM_PARTITION_TABLE_ENTRIES 4
//
// Helper Macros
//
#define GET_STARTING_SECTOR(p) \
((ULONG)(p->StartingSectorLsb0) + \
(ULONG)(p->StartingSectorLsb1 << 8 ) + \
(ULONG)(p->StartingSectorMsb0 << 16) + \
(ULONG)(p->StartingSectorMsb1 << 24))
#define GET_ENDING_S_OF_CHS(p) \
((UCHAR)(p->EndingCylinderLsb & 0x3F))
#define GET_PARTITION_LENGTH(p) \
((ULONG)(p->PartitionLengthLsb0) + \
(ULONG)(p->PartitionLengthLsb1 << 8) + \
(ULONG)(p->PartitionLengthMsb0 << 16) + \
(ULONG)(p->PartitionLengthMsb1 << 24))
//
// Structure describing a partition
//
typedef struct _PARTITION_DESCRIPTOR
{
UCHAR ActiveFlag;
UCHAR StartingTrack;
UCHAR StartingCylinderLsb;
UCHAR StartingCylinderMsb;
UCHAR PartitionType;
UCHAR EndingTrack;
UCHAR EndingCylinderLsb;
UCHAR EndingCylinderMsb;
UCHAR StartingSectorLsb0;
UCHAR StartingSectorLsb1;
UCHAR StartingSectorMsb0;
UCHAR StartingSectorMsb1;
UCHAR PartitionLengthLsb0;
UCHAR PartitionLengthLsb1;
UCHAR PartitionLengthMsb0;
UCHAR PartitionLengthMsb1;
} PARTITION_DESCRIPTOR, *PPARTITION_DESCRIPTOR;
//
// Structure describing a boot sector
//
typedef struct _BOOT_SECTOR_INFO
{
UCHAR JumpByte[1];
UCHAR Ignore1[2];
UCHAR OemData[8];
UCHAR BytesPerSector[2];
UCHAR Ignore2[6];
UCHAR NumberOfSectors[2];
UCHAR MediaByte[1];
UCHAR Ignore3[2];
UCHAR SectorsPerTrack[2];
UCHAR NumberOfHeads[2];
} BOOT_SECTOR_INFO, *PBOOT_SECTOR_INFO;
//
// Partition Table and Disk Layout
//
typedef struct _PARTITION_TABLE
{
PARTITION_INFORMATION PartitionEntry[4];
} PARTITION_TABLE, *PPARTITION_TABLE;
typedef struct _DISK_LAYOUT
{
ULONG TableCount;
ULONG Signature;
PARTITION_TABLE PartitionTable[1];
} DISK_LAYOUT, *PDISK_LAYOUT;
//
// Partition Table Entry
//
typedef struct _PTE
{
UCHAR ActiveFlag;
UCHAR StartingTrack;
USHORT StartingCylinder;
UCHAR PartitionType;
UCHAR EndingTrack;
USHORT EndingCylinder;
ULONG StartingSector;
ULONG PartitionLength;
} PTE, *PPTE;
#endif