xref: /illumos-gate/usr/src/uts/common/sys/mkdev.h (revision b4203d75)
1 /*
2  * CDDL HEADER START
3  *
4  * The contents of this file are subject to the terms of the
5  * Common Development and Distribution License (the "License").
6  * You may not use this file except in compliance with the License.
7  *
8  * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
9  * or http://www.opensolaris.org/os/licensing.
10  * See the License for the specific language governing permissions
11  * and limitations under the License.
12  *
13  * When distributing Covered Code, include this CDDL HEADER in each
14  * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
15  * If applicable, add the following below this CDDL HEADER, with the
16  * fields enclosed by brackets "[]" replaced with your own identifying
17  * information: Portions Copyright [yyyy] [name of copyright owner]
18  *
19  * CDDL HEADER END
20  */
21 /*
22  * Copyright 2014 Garrett D'Amore <garrett@damore.org>
23  *
24  * Copyright 2009 Sun Microsystems, Inc.  All rights reserved.
25  * Use is subject to license terms.
26  */
27 
28 /*	Copyright (c) 1984, 1986, 1987, 1988, 1989 AT&T	*/
29 /*	  All Rights Reserved	*/
30 
31 #ifndef _SYS_MKDEV_H
32 #define	_SYS_MKDEV_H
33 
34 #include <sys/types.h>
35 
36 #ifdef	__cplusplus
37 extern "C" {
38 #endif
39 
40 /*
41  * SVR3/Pre-EFT device number constants.
42  */
43 #define	ONBITSMAJOR	7	/* # of SVR3 major device bits */
44 #define	ONBITSMINOR	8	/* # of SVR3 minor device bits */
45 #define	OMAXMAJ		0x7f	/* SVR3 max major value */
46 #define	OMAXMIN		0xff	/* SVR3 max major value */
47 
48 /*
49  * 32-bit Solaris device major/minor sizes.
50  */
51 #define	NBITSMAJOR32	14
52 #define	NBITSMINOR32	18
53 #define	MAXMAJ32	0x3ffful	/* SVR4 max major value */
54 #define	MAXMIN32	0x3fffful	/* SVR4 max minor value */
55 
56 #define	NBITSMAJOR64	32	/* # of major device bits in 64-bit Solaris */
57 #define	NBITSMINOR64	32	/* # of minor device bits in 64-bit Solaris */
58 
59 #ifdef _LP64
60 
61 #define	MAXMAJ64	0xfffffffful	/* max major value */
62 #define	MAXMIN64	0xfffffffful	/* max minor value */
63 
64 #define	NBITSMAJOR	NBITSMAJOR64
65 #define	NBITSMINOR	NBITSMINOR64
66 #define	MAXMAJ		MAXMAJ64
67 #define	MAXMIN		MAXMIN64
68 
69 #else /* !_LP64 */
70 
71 #define	NBITSMAJOR	NBITSMAJOR32
72 #define	NBITSMINOR	NBITSMINOR32
73 #define	MAXMAJ		MAXMAJ32
74 #define	MAXMIN		MAXMIN32
75 
76 #endif /* !_LP64 */
77 
78 #if !defined(_KERNEL)
79 
80 /*
81  * Undefine sysmacros.h device macros.
82  */
83 #undef makedev
84 #undef major
85 #undef minor
86 
87 extern dev_t makedev(const major_t, const minor_t);
88 extern major_t major(const dev_t);
89 extern minor_t minor(const dev_t);
90 extern dev_t __makedev(const int, const major_t, const minor_t);
91 extern major_t __major(const int, const dev_t);
92 extern minor_t __minor(const int, const dev_t);
93 
94 #define	OLDDEV 0	/* old device format */
95 #define	NEWDEV 1	/* new device format */
96 
97 #define	makedev(maj, min)	(__makedev(NEWDEV, maj, min))
98 #define	major(dev)		(__major(NEWDEV, dev))
99 #define	minor(dev)		(__minor(NEWDEV, dev))
100 
101 #endif	/* !defined(_KERNEL) */
102 
103 #ifdef	__cplusplus
104 }
105 #endif
106 
107 #endif	/* _SYS_MKDEV_H */
108