disk.h

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/*
 *  FreeLoader
 *  Copyright (C) 1998-2003  Brian Palmer  <[e-mail]>
 *
 *  This program is free software; you can redistribute it and/or modify
 *  it under the terms of the GNU General Public License as published by
 *  the Free Software Foundation; either version 2 of the License, or
 *  (at your option) any later version.
 *
 *  This program is distributed in the hope that it will be useful,
 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *  GNU General Public License for more details.
 *
 *  You should have received a copy of the GNU General Public License
 *  along with this program; if not, write to the Free Software
 *  Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
 */

#ifndef __DISK_H
#define __DISK_H


typedef struct _GEOMETRY
{
	ULONG		Cylinders;						// Number of cylinders on the disk
	ULONG		Heads;							// Number of heads on the disk
	ULONG		Sectors;						// Number of sectors per track
	ULONG		BytesPerSector;					// Number of bytes per sector

} GEOMETRY, *PGEOMETRY;

//
// Extended disk geometry (Int13 / ah=48h)
//
typedef struct _EXTENDED_GEOMETRY
{
	USHORT		Size;
	USHORT		Flags;
	ULONG		Cylinders;
	ULONG		Heads;
	ULONG		SectorsPerTrack;
	ULONGLONG		Sectors;
	USHORT		BytesPerSector;
	ULONG		PDPTE;
} __attribute__((packed)) EXTENDED_GEOMETRY, *PEXTENDED_GEOMETRY;

//
// Define the structure of a partition table entry
//
typedef struct _PARTITION_TABLE_ENTRY
{
	UCHAR		BootIndicator;					// 0x00 - non-bootable partition, 0x80 - bootable partition (one partition only)
	UCHAR		StartHead;						// Beginning head number
	UCHAR		StartSector;					// Beginning sector (2 high bits of cylinder #)
	UCHAR		StartCylinder;					// Beginning cylinder# (low order bits of cylinder #)
	UCHAR		SystemIndicator;				// System indicator
	UCHAR		EndHead;						// Ending head number
	UCHAR		EndSector;						// Ending sector (2 high bits of cylinder #)
	UCHAR		EndCylinder;					// Ending cylinder# (low order bits of cylinder #)
	ULONG		SectorCountBeforePartition;		// Number of sectors preceding the partition
	ULONG		PartitionSectorCount;			// Number of sectors in the partition

} PACKED PARTITION_TABLE_ENTRY, *PPARTITION_TABLE_ENTRY;

//
// Define the structure of the master boot record
//
typedef struct _MASTER_BOOT_RECORD
{
	UCHAR			MasterBootRecordCodeAndData[0x1b8];	/* 0x000 */
	ULONG			Signature;				/* 0x1B8 */
	USHORT			Reserved;				/* 0x1BC */
	PARTITION_TABLE_ENTRY	PartitionTable[4];			/* 0x1BE */
	USHORT			MasterBootRecordMagic;			/* 0x1FE */

} PACKED MASTER_BOOT_RECORD, *PMASTER_BOOT_RECORD;

//
// Partition type defines
//
#define PARTITION_ENTRY_UNUSED          0x00      // Entry unused
#define PARTITION_FAT_12                0x01      // 12-bit FAT entries
#define PARTITION_XENIX_1               0x02      // Xenix
#define PARTITION_XENIX_2               0x03      // Xenix
#define PARTITION_FAT_16                0x04      // 16-bit FAT entries
#define PARTITION_EXTENDED              0x05      // Extended partition entry
#define PARTITION_HUGE                  0x06      // Huge partition MS-DOS V4
#define PARTITION_IFS                   0x07      // IFS Partition
#define PARTITION_OS2BOOTMGR            0x0A      // OS/2 Boot Manager/OPUS/Coherent swap
#define PARTITION_FAT32                 0x0B      // FAT32
#define PARTITION_FAT32_XINT13          0x0C      // FAT32 using extended int13 services
#define PARTITION_XINT13                0x0E      // Win95 partition using extended int13 services
#define PARTITION_XINT13_EXTENDED       0x0F      // Same as type 5 but uses extended int13 services
#define PARTITION_NTFS                  0x17      // NTFS
#define PARTITION_PREP                  0x41      // PowerPC Reference Platform (PReP) Boot Partition
#define PARTITION_LDM                   0x42      // Logical Disk Manager partition
#define PARTITION_UNIX                  0x63      // Unix
#define PARTITION_LINUX_SWAP			0x82      // Linux Swap Partition
#define PARTITION_EXT2					0x83      // Linux Ext2/Ext3

///////////////////////////////////////////////////////////////////////////////////////
//
// i386 BIOS Disk Functions (i386disk.c)
//
///////////////////////////////////////////////////////////////////////////////////////
#ifdef __i386__

BOOLEAN	DiskResetController(ULONG DriveNumber);
BOOLEAN	DiskInt13ExtensionsSupported(ULONG DriveNumber);
//VOID	DiskStopFloppyMotor(VOID);
BOOLEAN	DiskGetExtendedDriveParameters(ULONG DriveNumber, PVOID Buffer, USHORT BufferSize);

#endif // defined __i386__

///////////////////////////////////////////////////////////////////////////////////////
//
// FreeLoader Disk Functions
//
///////////////////////////////////////////////////////////////////////////////////////
VOID	DiskReportError (BOOLEAN bError);
VOID	DiskError(PCSTR ErrorString, ULONG ErrorCode);
PCSTR	DiskGetErrorCodeString(ULONG ErrorCode);
BOOLEAN	DiskReadLogicalSectors(ULONG DriveNumber, ULONGLONG SectorNumber, ULONG SectorCount, PVOID Buffer); // Implemented in i386disk.c
BOOLEAN	DiskIsDriveRemovable(ULONG DriveNumber);
VOID	DiskStopFloppyMotor(VOID);	// Implemented in i386disk.c

///////////////////////////////////////////////////////////////////////////////////////
//
// Fixed Disk Partition Management Functions
//
///////////////////////////////////////////////////////////////////////////////////////
BOOLEAN	DiskGetActivePartitionEntry(ULONG DriveNumber, PPARTITION_TABLE_ENTRY PartitionTableEntry, ULONG *ActivePartition);
BOOLEAN	DiskGetPartitionEntry(ULONG DriveNumber, ULONG PartitionNumber, PPARTITION_TABLE_ENTRY PartitionTableEntry);
BOOLEAN	DiskGetFirstPartitionEntry(PMASTER_BOOT_RECORD MasterBootRecord, PPARTITION_TABLE_ENTRY PartitionTableEntry);
BOOLEAN	DiskGetFirstExtendedPartitionEntry(PMASTER_BOOT_RECORD MasterBootRecord, PPARTITION_TABLE_ENTRY PartitionTableEntry);
BOOLEAN	DiskReadBootRecord(ULONG DriveNumber, ULONGLONG LogicalSectorNumber, PMASTER_BOOT_RECORD BootRecord);

#endif  // defined __DISK_H