/* @(#)diskmbr.h	1.1 99/12/19 Copyright 1999 J. Schilling */
/*
 *	Header file diskmbr.h - assorted structure definitions and macros
 *	describing standard PC partition table
 *
 *	Copyright (c) 1999 J. Schilling
 */
/*
 * 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, 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; see the file COPYING.  If not, write to
 * the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
 */

#ifndef _DISKMBR_H
#define _DISKMBR_H

#define MBR_MAGIC		0xAA55

#define PARTITION_UNUSED	0x00
#define PARTITION_ACTIVE	0x80

#define PARTITION_COUNT		4

#define MBR_SECTOR(x)		((x)&0x3F)
#define MBR_CYLINDER(x)		((x)>>8|((x)<<2&0x300))

struct disk_partition {
	unsigned char	status;
	unsigned char	s_head;
	unsigned char	s_cyl_sec[2];
	unsigned char	type;
	unsigned char	e_head;
	unsigned char	e_cyl_sec[2];
	unsigned char	boot_sec[4];
	unsigned char	size[4];
};

struct disk_master_boot_record {
	char			pad[0x1BE];
	struct disk_partition	partition[PARTITION_COUNT];
	unsigned char		magic[2];
};

#endif	/* _DISKMBR_H */
