kernel - Adjust tsc_delay()
[dragonfly.git] / include / disktab.h
blob433ff529a6056bc4e610c11c61b84cef5d13d459
1 /*
2 * Copyright (c) 1983, 1993
3 * The Regents of the University of California. All rights reserved.
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. 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.
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.
29 * @(#)disktab.h 8.1 (Berkeley) 6/2/93
30 * $DragonFly: src/include/disktab.h,v 1.4 2007/06/18 05:13:33 dillon Exp $
33 #ifndef _DISKTAB_H_
34 #define _DISKTAB_H_
36 #ifndef _MACHINE_TYPES_H_
37 #include <machine/types.h>
38 #endif
41 * Disk description table, see disktab(5)
43 #ifndef _PATH_DISKTAB
44 #define _PATH_DISKTAB "/etc/disktab"
45 #endif
47 #define MAXDTPARTITIONS 16
49 struct disktab {
50 char d_typename[16]; /* drive type (string) */
51 int d_typeid; /* drive type (id) */
54 * disk_info mandatory fields (not necessarily mandatory for disktab).
55 * If d_media_blksize and one of d_media_size or d_media_blocks
56 * is set, the remainining d_media_size/d_media_blocks field will
57 * be constructed by getdisktabbyname().
59 __uint64_t d_media_size;
60 __uint64_t d_media_blocks;
61 int d_media_blksize;
62 int d_dsflags;
65 * disk_info optional fields.
67 unsigned int d_nheads; /* (used to be d_ntracks) */
68 unsigned int d_secpertrack; /* (used to be d_nsectors) */
69 unsigned int d_secpercyl;
70 unsigned int d_ncylinders;
72 int d_rpm; /* revolutions/minute */
73 int d_badsectforw; /* supports DEC bad144 std */
74 int d_sectoffset; /* use sect rather than cyl offsets */
75 int d_npartitions; /* number of partitions */
76 int d_interleave;
77 int d_trackskew;
78 int d_cylskew;
79 int d_headswitch;
80 int d_trkseek;
82 unsigned int d_bbsize; /* size of boot area */
83 unsigned int d_sbsize; /* max size of fs superblock */
86 * The partition table is variable length but does not necessarily
87 * represent the maximum possible number of partitions for any
88 * particular type of disklabel.
90 struct dt_partition {
91 __uint64_t p_offset; /* offset, in sectors */
92 __uint64_t p_size; /* #sectors in partition */
93 int p_fstype;
94 int p_fsize; /* fragment size */
95 int p_frag; /* bsize = fsize * frag */
96 char p_fstypestr[32];
97 } d_partitions[MAXDTPARTITIONS];
100 #ifndef _KERNEL
101 __BEGIN_DECLS
102 struct disklabel32;
103 struct disktab *getdisktabbyname (const char *);
104 struct disklabel32 *getdiskbyname (const char *);
105 __END_DECLS
106 #endif
108 #endif /* !_DISKTAB_H_ */