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
  16  *  along with this program; if not, write to the Free Software
  17  *  Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  18  */
  19
  20 #ifndef __DISK_H
  21 #define __DISK_H
  22
  23
  24 typedef struct _GEOMETRY
  25 {
  26         U32             Cylinders;                                              // Number of cylinders on the disk
  27         U32             Heads;                                                  // Number of heads on the disk
  28         U32             Sectors;                                                // Number of sectors per track
  29         U32             BytesPerSector;                                 // Number of bytes per sector
  30
  31 } GEOMETRY, *PGEOMETRY;
  32
  33 //
  34 // Extended disk geometry (Int13 / ah=48h)
  35 //
  36 typedef struct _EXTENDED_GEOMETRY
  37 {
  38         U16             Size;
  39         U16             Flags;
  40         U32             Cylinders;
  41         U32             Heads;
  42         U32             SectorsPerTrack;
  43         U64             Sectors;
  44         U16             BytesPerSector;
  45         U32             PDPTE;
  46 } __attribute__((packed)) EXTENDED_GEOMETRY, *PEXTENDED_GEOMETRY;
  47
  48 //
  49 // Define the structure of a partition table entry
  50 //
  51 typedef struct _PARTITION_TABLE_ENTRY
  52 {
  53         U8              BootIndicator;                                  // 0x00 - non-bootable partition, 0x80 - bootable partition (one partition only)
  54         U8              StartHead;                                              // Beginning head number
  55         U8              StartSector;                                    // Beginning sector (2 high bits of cylinder #)
  56         U8              StartCylinder;                                  // Beginning cylinder# (low order bits of cylinder #)
  57         U8              SystemIndicator;                                // System indicator
  58         U8              EndHead;                                                // Ending head number
  59         U8              EndSector;                                              // Ending sector (2 high bits of cylinder #)
  60         U8              EndCylinder;                                    // Ending cylinder# (low order bits of cylinder #)
  61         U32             SectorCountBeforePartition;             // Number of sectors preceding the partition
  62         U32             PartitionSectorCount;                   // Number of sectors in the partition
  63
  64 } PACKED PARTITION_TABLE_ENTRY, *PPARTITION_TABLE_ENTRY;
  65
  66 //
  67 // Define the structure of the master boot record
  68 //
  69 typedef struct _MASTER_BOOT_RECORD
  70 {
  71         U8                      MasterBootRecordCodeAndData[0x1b8];     /* 0x000 */
  72         U32                     Signature;                              /* 0x1B8 */
  73         U16                     Reserved;                               /* 0x1BC */
  74         PARTITION_TABLE_ENTRY   PartitionTable[4];                      /* 0x1BE */
  75         U16                     MasterBootRecordMagic;                  /* 0x1FE */
  76
  77 } PACKED MASTER_BOOT_RECORD, *PMASTER_BOOT_RECORD;
  78
  79 //
  80 // Partition type defines
  81 //
  82 #define PARTITION_ENTRY_UNUSED          0x00      // Entry unused
  83 #define PARTITION_FAT_12                0x01      // 12-bit FAT entries
  84 #define PARTITION_XENIX_1               0x02      // Xenix
  85 #define PARTITION_XENIX_2               0x03      // Xenix
  86 #define PARTITION_FAT_16                0x04      // 16-bit FAT entries
  87 #define PARTITION_EXTENDED              0x05      // Extended partition entry
  88 #define PARTITION_HUGE                  0x06      // Huge partition MS-DOS V4
  89 #define PARTITION_IFS                   0x07      // IFS Partition
  90 #define PARTITION_OS2BOOTMGR            0x0A      // OS/2 Boot Manager/OPUS/Coherent swap
  91 #define PARTITION_FAT32                 0x0B      // FAT32
  92 #define PARTITION_FAT32_XINT13          0x0C      // FAT32 using extended int13 services
  93 #define PARTITION_XINT13                0x0E      // Win95 partition using extended int13 services
  94 #define PARTITION_XINT13_EXTENDED       0x0F      // Same as type 5 but uses extended int13 services
  95 #define PARTITION_NTFS                  0x17      // NTFS
  96 #define PARTITION_PREP                  0x41      // PowerPC Reference Platform (PReP) Boot Partition
  97 #define PARTITION_LDM                   0x42      // Logical Disk Manager partition
  98 #define PARTITION_UNIX                  0x63      // Unix
  99 #define PARTITION_LINUX_SWAP                    0x82      // Linux Swap Partition
 100 #define PARTITION_EXT2                                  0x83      // Linux Ext2/Ext3
 101
 102 ///////////////////////////////////////////////////////////////////////////////////////
 103 //
 104 // i386 BIOS Disk Functions (i386disk.c)
 105 //
 106 ///////////////////////////////////////////////////////////////////////////////////////
 107 #ifdef __i386__
 108
 109 BOOL    DiskResetController(U32 DriveNumber);
 110 BOOL    DiskInt13ExtensionsSupported(U32 DriveNumber);
 111 //VOID  DiskStopFloppyMotor(VOID);
 112 BOOL    DiskGetExtendedDriveParameters(U32 DriveNumber, PVOID Buffer, U16 BufferSize);
 113
 114 #endif // defined __i386__
 115
 116 ///////////////////////////////////////////////////////////////////////////////////////
 117 //
 118 // FreeLoader Disk Functions
 119 //
 120 ///////////////////////////////////////////////////////////////////////////////////////
 121 VOID    DiskReportError (BOOL bError);
 122 VOID    DiskError(PUCHAR ErrorString, U32 ErrorCode);
 123 PUCHAR  DiskGetErrorCodeString(U32 ErrorCode);
 124 BOOL    DiskReadLogicalSectors(U32 DriveNumber, U64 SectorNumber, U32 SectorCount, PVOID Buffer); // Implemented in i386disk.c
 125 BOOL    DiskIsDriveRemovable(U32 DriveNumber);
 126 VOID    DiskStopFloppyMotor(VOID);      // Implemented in i386disk.c
 127
 128 ///////////////////////////////////////////////////////////////////////////////////////
 129 //
 130 // Fixed Disk Partition Management Functions
 131 //
 132 ///////////////////////////////////////////////////////////////////////////////////////
 133 BOOL    DiskGetActivePartitionEntry(U32 DriveNumber, PPARTITION_TABLE_ENTRY PartitionTableEntry);
 134 BOOL    DiskGetPartitionEntry(U32 DriveNumber, U32 PartitionNumber, PPARTITION_TABLE_ENTRY PartitionTableEntry);
 135 BOOL    DiskGetFirstPartitionEntry(PMASTER_BOOT_RECORD MasterBootRecord, PPARTITION_TABLE_ENTRY PartitionTableEntry);
 136 BOOL    DiskGetFirstExtendedPartitionEntry(PMASTER_BOOT_RECORD MasterBootRecord, PPARTITION_TABLE_ENTRY PartitionTableEntry);
 137 BOOL    DiskReadBootRecord(U32 DriveNumber, U64 LogicalSectorNumber, PMASTER_BOOT_RECORD BootRecord);
 138
 139 #endif  // defined __DISK_H