boot/freeldr/freeldr/include/disk.h

   1 /*
   2  *  FreeLoader
   3  *  Copyright (C) 1998-2003  Brian Palmer  <brianp@sginet.com>
   4  *
   5  *  This program is free software; you can redistribute it and/or modify
   6  *  it under the terms of the GNU General Public License as published by
   7  *  the Free Software Foundation; either version 2 of the License, or
   8  *  (at your option) any later version.
   9  *
  10  *  This program is distributed in the hope that it will be useful,
  11  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13  *  GNU General Public License for more details.
  14  *
  15  *  You should have received a copy of the GNU General Public License along
  16  *  with this program; if not, write to the Free Software Foundation, Inc.,
  17  *  51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
  18  */
  19
  20 #pragma once
  21
  22 #include <reactos/rosioctl.h>
  23
  24 typedef struct _GEOMETRY
  25 {
  26     ULONG   Cylinders;      // Number of cylinders on the disk
  27     ULONG   Heads;          // Number of heads on the disk
  28     ULONG   Sectors;        // Number of sectors per track
  29     ULONG   BytesPerSector; // Number of bytes per sector
  30
  31 } GEOMETRY, *PGEOMETRY;
  32
  33 /*
  34  * Extended disk geometry (Int13 / ah=48h)
  35  */
  36 #include <pshpack1.h>
  37 typedef struct _EXTENDED_GEOMETRY
  38 {
  39     USHORT      Size;
  40     USHORT      Flags;
  41     ULONG       Cylinders;
  42     ULONG       Heads;
  43     ULONG       SectorsPerTrack;
  44     ULONGLONG   Sectors;
  45     USHORT      BytesPerSector;
  46     ULONG       PDPTE;
  47
  48 } EXTENDED_GEOMETRY, *PEXTENDED_GEOMETRY;
  49
  50 /*
  51  * Define the structure of a partition table entry
  52  */
  53 typedef struct _PARTITION_TABLE_ENTRY
  54 {
  55     UCHAR   BootIndicator;              // 0x00 - non-bootable partition,
  56                                         // 0x80 - bootable partition (one partition only)
  57     UCHAR   StartHead;                  // Beginning head number
  58     UCHAR   StartSector;                // Beginning sector (2 high bits of cylinder #)
  59     UCHAR   StartCylinder;              // Beginning cylinder# (low order bits of cylinder #)
  60     UCHAR   SystemIndicator;            // System indicator
  61     UCHAR   EndHead;                    // Ending head number
  62     UCHAR   EndSector;                  // Ending sector (2 high bits of cylinder #)
  63     UCHAR   EndCylinder;                // Ending cylinder# (low order bits of cylinder #)
  64     ULONG   SectorCountBeforePartition; // Number of sectors preceding the partition
  65     ULONG   PartitionSectorCount;       // Number of sectors in the partition
  66
  67 } PARTITION_TABLE_ENTRY, *PPARTITION_TABLE_ENTRY;
  68
  69 /*
  70  * Define the structure of the master boot record
  71  */
  72 typedef struct _MASTER_BOOT_RECORD
  73 {
  74     UCHAR   MasterBootRecordCodeAndData[0x1b8]; /* 0x000 */
  75     ULONG   Signature;                          /* 0x1B8 */
  76     USHORT  Reserved;                           /* 0x1BC */
  77     PARTITION_TABLE_ENTRY   PartitionTable[4];  /* 0x1BE */
  78     USHORT  MasterBootRecordMagic;              /* 0x1FE */
  79
  80 } MASTER_BOOT_RECORD, *PMASTER_BOOT_RECORD;
  81 #include <poppack.h>
  82
  83 /*
  84  * Partition type defines (of PSDK)
  85  */
  86 #define PARTITION_ENTRY_UNUSED          0x00      // Entry unused
  87 #define PARTITION_FAT_12                0x01      // 12-bit FAT entries
  88 #define PARTITION_XENIX_1               0x02      // Xenix
  89 #define PARTITION_XENIX_2               0x03      // Xenix
  90 #define PARTITION_FAT_16                0x04      // 16-bit FAT entries
  91 #define PARTITION_EXTENDED              0x05      // Extended partition entry
  92 #define PARTITION_HUGE                  0x06      // Huge partition MS-DOS V4
  93 #define PARTITION_IFS                   0x07      // IFS Partition
  94 #define PARTITION_OS2BOOTMGR            0x0A      // OS/2 Boot Manager/OPUS/Coherent swap
  95 #define PARTITION_FAT32                 0x0B      // FAT32
  96 #define PARTITION_FAT32_XINT13          0x0C      // FAT32 using extended int13 services
  97 #define PARTITION_XINT13                0x0E      // Win95 partition using extended int13 services
  98 #define PARTITION_XINT13_EXTENDED       0x0F      // Same as type 5 but uses extended int13 services
  99 #define PARTITION_NTFS                  0x17      // NTFS
 100 #define PARTITION_PREP                  0x41      // PowerPC Reference Platform (PReP) Boot Partition
 101 #define PARTITION_LDM                   0x42      // Logical Disk Manager partition
 102 #define PARTITION_UNIX                  0x63      // Unix
 103 #define VALID_NTFT                      0xC0      // NTFT uses high order bits
 104 #define PARTITION_NTFT                  0x80      // NTFT partition
 105 #define PARTITION_GPT                   0xEE      // GPT protective partition
 106 #ifdef __REACTOS__
 107 #define PARTITION_OLD_LINUX             0x43
 108 #define PARTITION_LINUX                 0x83
 109 #endif
 110
 111 ///////////////////////////////////////////////////////////////////////////////////////
 112 //
 113 // PC x86/64 BIOS Disk Functions (pcdisk.c)
 114 //
 115 ///////////////////////////////////////////////////////////////////////////////////////
 116 #if defined(__i386__) || defined(_M_AMD64)
 117 VOID DiskStopFloppyMotor(VOID);
 118 #endif // defined __i386__ || defined(_M_AMD64)
 119
 120 /* Buffer for disk reads (hwdisk.c) */
 121 extern PVOID DiskReadBuffer;
 122 extern SIZE_T DiskReadBufferSize;
 123
 124
 125 /* ARC path of the boot drive and partition */
 126 extern CCHAR FrldrBootPath[MAX_PATH];
 127
 128
 129 ///////////////////////////////////////////////////////////////////////////////////////
 130 //
 131 // Fixed Disk Partition Management Functions
 132 //
 133 ///////////////////////////////////////////////////////////////////////////////////////
 134
 135 VOID
 136 DiskDetectPartitionType(
 137     IN UCHAR DriveNumber);
 138
 139 BOOLEAN
 140 DiskGetBootPartitionEntry(
 141     IN UCHAR DriveNumber,
 142     OUT PPARTITION_TABLE_ENTRY PartitionTableEntry,
 143     OUT PULONG BootPartition);
 144
 145 BOOLEAN
 146 DiskGetPartitionEntry(
 147     IN UCHAR DriveNumber,
 148     IN ULONG PartitionNumber,
 149     OUT PPARTITION_TABLE_ENTRY PartitionTableEntry);
 150
 151 /*
 152  * SCSI support (disk/scsiport.c)
 153  */
 154 ULONG LoadBootDeviceDriver(VOID);