2 * Copyright (c) 1987, 1988, 1993
3 * The Regents of the University of California. All rights reserved.
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6 * modification, are permitted provided that the following conditions
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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
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33 * @(#)disklabel.h 8.2 (Berkeley) 7/10/94
35 * $DragonFly: src/sys/sys/diskmbr.h,v 1.2 2004/04/21 02:32:41 cpressey Exp $
38 #ifndef _SYS_DISKMBR_H_
39 #define _SYS_DISKMBR_H_
41 #include <sys/ioccom.h>
43 #define DOSBBSECTOR 0 /* DOS boot block relative sector number */
44 #define DOSPARTOFF 446
45 #define DOSPARTSIZE 16
47 #define NEXTDOSPART 32
48 #define DOSMAGICOFFSET 510
49 #define DOSMAGIC 0xAA55
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 */
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 */
71 CTASSERT(sizeof (struct dos_partition
) == DOSPARTSIZE
);
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 */
77 #define DIOCSMBR _IOW('M', 129, u_char[512])
79 #endif /* !_SYS_DISKMBR_H_ */