1 /* 2 * Copyright (c) 1987, 1988, 1993 3 * The Regents of the University of California. All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 3. All advertising materials mentioning features or use of this software 14 * must display the following acknowledgement: 15 * This product includes software developed by the University of 16 * California, Berkeley and its contributors. 17 * 4. Neither the name of the University nor the names of its contributors 18 * may be used to endorse or promote products derived from this software 19 * without specific prior written permission. 20 * 21 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 24 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 31 * SUCH DAMAGE. 32 * 33 * @(#)disklabel.h 8.2 (Berkeley) 7/10/94 34 * $FreeBSD$ 35 * $DragonFly: src/sys/sys/diskmbr.h,v 1.2 2004/04/21 02:32:41 cpressey Exp $ 36 */ 37 38 #ifndef _SYS_DISKMBR_H_ 39 #define _SYS_DISKMBR_H_ 40 41 #include <sys/ioccom.h> 42 43 #define DOSBBSECTOR 0 /* DOS boot block relative sector number */ 44 #define DOSPARTOFF 446 45 #define DOSPARTSIZE 16 46 #define NDOSPART 4 47 #define NEXTDOSPART 32 48 #define DOSMAGICOFFSET 510 49 #define DOSMAGIC 0xAA55 50 51 #define DOSPTYP_386BSD 0xa5 /* 386BSD partition type */ 52 #define DOSPTYP_LINSWP 0x82 /* Linux swap partition */ 53 #define DOSPTYP_LINUX 0x83 /* Linux partition */ 54 #define DOSPTYP_PMBR 0xee /* GPT Protective MBR */ 55 #define DOSPTYP_EXT 5 /* DOS extended partition */ 56 #define DOSPTYP_EXTLBA 15 /* DOS extended partition */ 57 58 struct dos_partition { 59 unsigned char dp_flag; /* bootstrap flags */ 60 unsigned char dp_shd; /* starting head */ 61 unsigned char dp_ssect; /* starting sector */ 62 unsigned char dp_scyl; /* starting cylinder */ 63 unsigned char dp_typ; /* partition type */ 64 unsigned char dp_ehd; /* end head */ 65 unsigned char dp_esect; /* end sector */ 66 unsigned char dp_ecyl; /* end cylinder */ 67 u_int32_t dp_start; /* absolute starting sector number */ 68 u_int32_t dp_size; /* partition size in sectors */ 69 }; 70 #ifdef CTASSERT 71 CTASSERT(sizeof (struct dos_partition) == DOSPARTSIZE); 72 #endif 73 74 #define DPSECT(s) ((s) & 0x3f) /* isolate relevant bits of sector */ 75 #define DPCYL(c, s) ((c) + (((s) & 0xc0)<<2)) /* and those that are cylinder */ 76 77 #define DIOCSMBR _IOW('M', 129, u_char[512]) 78 79 #endif /* !_SYS_DISKMBR_H_ */ 80