1 /* @(#)diskmbr.h 1.2 04/03/02 Copyright 1999-2004 J. Schilling */ 2 /* 3 * Header file diskmbr.h - assorted structure definitions and macros 4 * describing standard PC partition table 5 * 6 * Copyright (c) 1999-2004 J. Schilling 7 */ 8 /* 9 * This program is free software; you can redistribute it and/or modify 10 * it under the terms of the GNU General Public License version 2 11 * as published by the Free Software Foundation. 12 * 13 * This program is distributed in the hope that it will be useful, 14 * but WITHOUT ANY WARRANTY; without even the implied warranty of 15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 16 * GNU General Public License for more details. 17 * 18 * You should have received a copy of the GNU General Public License along with 19 * this program; see the file COPYING. If not, write to the Free Software 20 * Foundation, 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. 21 */ 22 23 #ifndef _DISKMBR_H 24 #define _DISKMBR_H 25 26 #define MBR_MAGIC 0xAA55 27 28 #define PARTITION_UNUSED 0x00 29 #define PARTITION_ACTIVE 0x80 30 31 #define PARTITION_COUNT 4 32 33 #define MBR_SECTOR(x) ((x)&0x3F) 34 #define MBR_CYLINDER(x) ((x)>>8|((x)<<2&0x300)) 35 36 struct disk_partition { 37 unsigned char status; 38 unsigned char s_head; 39 unsigned char s_cyl_sec[2]; 40 unsigned char type; 41 unsigned char e_head; 42 unsigned char e_cyl_sec[2]; 43 unsigned char boot_sec[4]; 44 unsigned char size[4]; 45 }; 46 47 struct disk_master_boot_record { 48 char pad[0x1BE]; 49 struct disk_partition partition[PARTITION_COUNT]; 50 unsigned char magic[2]; 51 }; 52 53 #endif /* _DISKMBR_H */ 54