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 * 4. Neither the name of the University nor the names of its contributors 14 * may be used to endorse or promote products derived from this software 15 * without specific prior written permission. 16 * 17 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 20 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 27 * SUCH DAMAGE. 28 * 29 * @(#)disklabel.h 8.2 (Berkeley) 7/10/94 30 * $FreeBSD: src/sys/sys/diskmbr.h,v 1.99.2.1 2005/01/31 23:26:56 imp Exp $ 31 */ 32 33 #ifndef _SYS_DISKMBR_H_ 34 #define _SYS_DISKMBR_H_ 35 36 #define DOSBBSECTOR 0 /* DOS boot block relative sector number */ 37 #define DOSPARTOFF 446 38 #define DOSPARTSIZE 16 39 #define NDOSPART 4 40 #define NEXTDOSPART 32 41 #define DOSMAGICOFFSET 510 42 #define DOSMAGIC 0xAA55 43 44 #define DOSPTYP_386BSD 0xa5 /* 386BSD partition type */ 45 #define DOSPTYP_LINSWP 0x82 /* Linux swap partition */ 46 #define DOSPTYP_LINUX 0x83 /* Linux partition */ 47 #define DOSPTYP_PMBR 0xee /* GPT Protective MBR */ 48 #define DOSPTYP_EXT 5 /* DOS extended partition */ 49 #define DOSPTYP_EXTLBA 15 /* DOS extended partition */ 50 51 struct dos_partition { 52 unsigned char dp_flag; /* bootstrap flags */ 53 unsigned char dp_shd; /* starting head */ 54 unsigned char dp_ssect; /* starting sector */ 55 unsigned char dp_scyl; /* starting cylinder */ 56 unsigned char dp_typ; /* partition type */ 57 unsigned char dp_ehd; /* end head */ 58 unsigned char dp_esect; /* end sector */ 59 unsigned char dp_ecyl; /* end cylinder */ 60 u_int32_t dp_start; /* absolute starting sector number */ 61 u_int32_t dp_size; /* partition size in sectors */ 62 }; 63 #ifdef CTASSERT 64 CTASSERT(sizeof (struct dos_partition) == DOSPARTSIZE); 65 #endif 66 67 void dos_partition_dec(void const *pp, struct dos_partition *d); 68 void dos_partition_enc(void *pp, struct dos_partition *d); 69 70 #define DPSECT(s) ((s) & 0x3f) /* isolate relevant bits of sector */ 71 #define DPCYL(c, s) ((c) + (((s) & 0xc0)<<2)) /* and those that are cylinder */ 72 73 #define DIOCSMBR _IOW('M', 129, u_char[512]) 74 75 #endif /* !_SYS_DISKMBR_H_ */ 76