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 #ifndef _HAL_
   9 #define _HAL_
  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
  57 //
  58 // Various offsets in the boot record
  59 //
  60 #define PARTITION_TABLE_OFFSET                      (0x1BE / 2)
  61 #define BOOT_SIGNATURE_OFFSET                       ((0x200 / 2) - 1)
  62 #define BOOT_RECORD_RESERVED                        0x1BC
  63 #define BOOT_RECORD_SIGNATURE                       0xAA55
  64 #define NUM_PARTITION_TABLE_ENTRIES                 4
  65
  66 //
  67 // Helper Macros
  68 //
  69 #define GET_STARTING_SECTOR(p)                      \
  70     ((ULONG)(p->StartingSectorLsb0) +               \
  71      (ULONG)(p->StartingSectorLsb1 << 8 ) +         \
  72      (ULONG)(p->StartingSectorMsb0 << 16) +         \
  73      (ULONG)(p->StartingSectorMsb1 << 24))
  74
  75 #define GET_ENDING_S_OF_CHS(p)                      \
  76     ((UCHAR)(p->EndingCylinderLsb & 0x3F))
  77
  78 #define GET_PARTITION_LENGTH(p)                     \
  79     ((ULONG)(p->PartitionLengthLsb0) +              \
  80      (ULONG)(p->PartitionLengthLsb1 << 8) +         \
  81      (ULONG)(p->PartitionLengthMsb0 << 16) +        \
  82      (ULONG)(p->PartitionLengthMsb1 << 24))
  83
  84 //
  85 // Structure describing a partition
  86 //
  87 typedef struct _PARTITION_DESCRIPTOR
  88 {
  89     UCHAR ActiveFlag;
  90     UCHAR StartingTrack;
  91     UCHAR StartingCylinderLsb;
  92     UCHAR StartingCylinderMsb;
  93     UCHAR PartitionType;
  94     UCHAR EndingTrack;
  95     UCHAR EndingCylinderLsb;
  96     UCHAR EndingCylinderMsb;
  97     UCHAR StartingSectorLsb0;
  98     UCHAR StartingSectorLsb1;
  99     UCHAR StartingSectorMsb0;
 100     UCHAR StartingSectorMsb1;
 101     UCHAR PartitionLengthLsb0;
 102     UCHAR PartitionLengthLsb1;
 103     UCHAR PartitionLengthMsb0;
 104     UCHAR PartitionLengthMsb1;
 105 } PARTITION_DESCRIPTOR, *PPARTITION_DESCRIPTOR;
 106
 107 //
 108 // Structure describing a boot sector
 109 //
 110 typedef struct _BOOT_SECTOR_INFO
 111 {
 112     UCHAR JumpByte[1];
 113     UCHAR Ignore1[2];
 114     UCHAR OemData[8];
 115     UCHAR BytesPerSector[2];
 116     UCHAR Ignore2[6];
 117     UCHAR NumberOfSectors[2];
 118     UCHAR MediaByte[1];
 119     UCHAR Ignore3[2];
 120     UCHAR SectorsPerTrack[2];
 121     UCHAR NumberOfHeads[2];
 122 } BOOT_SECTOR_INFO, *PBOOT_SECTOR_INFO;
 123
 124 //
 125 // Partition Table and Disk Layout
 126 //
 127 typedef struct _PARTITION_TABLE
 128 {
 129     PARTITION_INFORMATION PartitionEntry[4];
 130 } PARTITION_TABLE, *PPARTITION_TABLE;
 131
 132 typedef struct _DISK_LAYOUT
 133 {
 134     ULONG TableCount;
 135     ULONG Signature;
 136     PARTITION_TABLE PartitionTable[1];
 137 } DISK_LAYOUT, *PDISK_LAYOUT;
 138
 139 //
 140 // Partition Table Entry
 141 //
 142 typedef struct _PTE
 143 {
 144     UCHAR ActiveFlag;
 145     UCHAR StartingTrack;
 146     USHORT StartingCylinder;
 147     UCHAR PartitionType;
 148     UCHAR EndingTrack;
 149     USHORT EndingCylinder;
 150     ULONG StartingSector;
 151     ULONG PartitionLength;
 152 } PTE, *PPTE;
 153
 154 #endif