reactos/ntoskrnl/include/internal/hal.h

   1 /*
   2  * PROJECT:         ReactOS Kernel
   3  * LICENSE:         GPL - See COPYING in the top level directory
   4  * FILE:            ntoskrnl/include/hal.h
   5  * PURPOSE:         Internal header for the I/O HAL Functions (Fstub)
   6  * PROGRAMMERS:     Alex Ionescu (alex.ionescu@reactos.org)
   7  */
   8
   9 #pragma once
  10
  11 //
  12 // Default implementations of HAL dispatch table
  13 //
  14 VOID
  15 FASTCALL
  16 xHalExamineMBR(IN PDEVICE_OBJECT DeviceObject,
  17                IN ULONG SectorSize,
  18                IN ULONG MbrTypeIdentifier,
  19                OUT PVOID *MbrBuffer);
  20
  21 VOID
  22 FASTCALL
  23 xHalIoAssignDriveLetters(IN PLOADER_PARAMETER_BLOCK LoaderBlock,
  24                          IN PSTRING NtDeviceName,
  25                          OUT PUCHAR NtSystemPath,
  26                          OUT PSTRING NtSystemPathString);
  27
  28 NTSTATUS
  29 FASTCALL
  30 xHalIoReadPartitionTable(IN PDEVICE_OBJECT DeviceObject,
  31                          IN ULONG SectorSize,
  32                          IN BOOLEAN ReturnRecognizedPartitions,
  33                          IN OUT PDRIVE_LAYOUT_INFORMATION *PartitionBuffer);
  34
  35 NTSTATUS
  36 FASTCALL
  37 xHalIoSetPartitionInformation(IN PDEVICE_OBJECT DeviceObject,
  38                               IN ULONG SectorSize,
  39                               IN ULONG PartitionNumber,
  40                               IN ULONG PartitionType);
  41
  42 NTSTATUS
  43 FASTCALL
  44 xHalIoWritePartitionTable(IN PDEVICE_OBJECT DeviceObject,
  45                           IN ULONG SectorSize,
  46                           IN ULONG SectorsPerTrack,
  47                           IN ULONG NumberOfHeads,
  48                           IN PDRIVE_LAYOUT_INFORMATION PartitionBuffer);
  49
  50 VOID
  51 NTAPI
  52 xHalHaltSystem(
  53     VOID
  54 );
  55
  56 UCHAR
  57 NTAPI
  58 xHalVectorToIDTEntry(
  59     IN ULONG Vector
  60 );
  61
  62
  63 //
  64 // Various offsets in the boot record
  65 //
  66 #define PARTITION_TABLE_OFFSET                      (0x1BE / 2)
  67 #define BOOT_SIGNATURE_OFFSET                       ((0x200 / 2) - 1)
  68 #define BOOT_RECORD_RESERVED                        0x1BC
  69 #define BOOT_RECORD_SIGNATURE                       0xAA55
  70 #define NUM_PARTITION_TABLE_ENTRIES                 4
  71
  72 //
  73 // Helper Macros
  74 //
  75 #define GET_STARTING_SECTOR(p)                      \
  76     ((ULONG)(p->StartingSectorLsb0) +               \
  77      (ULONG)(p->StartingSectorLsb1 << 8 ) +         \
  78      (ULONG)(p->StartingSectorMsb0 << 16) +         \
  79      (ULONG)(p->StartingSectorMsb1 << 24))
  80
  81 #define GET_ENDING_S_OF_CHS(p)                      \
  82     ((UCHAR)(p->EndingCylinderLsb & 0x3F))
  83
  84 #define GET_PARTITION_LENGTH(p)                     \
  85     ((ULONG)(p->PartitionLengthLsb0) +              \
  86      (ULONG)(p->PartitionLengthLsb1 << 8) +         \
  87      (ULONG)(p->PartitionLengthMsb0 << 16) +        \
  88      (ULONG)(p->PartitionLengthMsb1 << 24))
  89
  90 //
  91 // Structure describing a partition
  92 //
  93 typedef struct _PARTITION_DESCRIPTOR
  94 {
  95     UCHAR ActiveFlag;
  96     UCHAR StartingTrack;
  97     UCHAR StartingCylinderLsb;
  98     UCHAR StartingCylinderMsb;
  99     UCHAR PartitionType;
 100     UCHAR EndingTrack;
 101     UCHAR EndingCylinderLsb;
 102     UCHAR EndingCylinderMsb;
 103     UCHAR StartingSectorLsb0;
 104     UCHAR StartingSectorLsb1;
 105     UCHAR StartingSectorMsb0;
 106     UCHAR StartingSectorMsb1;
 107     UCHAR PartitionLengthLsb0;
 108     UCHAR PartitionLengthLsb1;
 109     UCHAR PartitionLengthMsb0;
 110     UCHAR PartitionLengthMsb1;
 111 } PARTITION_DESCRIPTOR, *PPARTITION_DESCRIPTOR;
 112
 113 //
 114 // Structure describing a boot sector
 115 //
 116 typedef struct _BOOT_SECTOR_INFO
 117 {
 118     UCHAR JumpByte[1];
 119     UCHAR Ignore1[2];
 120     UCHAR OemData[8];
 121     UCHAR BytesPerSector[2];
 122     UCHAR Ignore2[6];
 123     UCHAR NumberOfSectors[2];
 124     UCHAR MediaByte[1];
 125     UCHAR Ignore3[2];
 126     UCHAR SectorsPerTrack[2];
 127     UCHAR NumberOfHeads[2];
 128 } BOOT_SECTOR_INFO, *PBOOT_SECTOR_INFO;
 129
 130 //
 131 // Partition Table and Disk Layout
 132 //
 133 typedef struct _PARTITION_TABLE
 134 {
 135     PARTITION_INFORMATION PartitionEntry[4];
 136 } PARTITION_TABLE, *PPARTITION_TABLE;
 137
 138 typedef struct _DISK_LAYOUT
 139 {
 140     ULONG TableCount;
 141     ULONG Signature;
 142     PARTITION_TABLE PartitionTable[1];
 143 } DISK_LAYOUT, *PDISK_LAYOUT;
 144
 145 //
 146 // Partition Table Entry
 147 //
 148 typedef struct _PTE
 149 {
 150     UCHAR ActiveFlag;
 151     UCHAR StartingTrack;
 152     USHORT StartingCylinder;
 153     UCHAR PartitionType;
 154     UCHAR EndingTrack;
 155     USHORT EndingCylinder;
 156     ULONG StartingSector;
 157     ULONG PartitionLength;
 158 } PTE, *PPTE;