diskmbr.h

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/* @(#)diskmbr.h    1.2 04/03/02 Copyright 1999-2004 J. Schilling */
/*
 *  Header file diskmbr.h - assorted structure definitions and macros
 *  describing standard PC partition table
 *
 *  Copyright (c) 1999-2004 J. Schilling
 */
/*
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License version 2
 * as published by the Free Software Foundation.
 *
 * 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, 59 Temple Place - Suite 330, Boston, MA 02111-1307, 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 */