xref: /netbsd-src/sys/compat/linux/arch/m68k/linux_ioctl.h (revision 481fca6e59249d8ffcf24fef7cfbe7b131bfb080)
1 /*	$NetBSD: linux_ioctl.h,v 1.1 1998/12/15 19:25:40 itohy Exp $	*/
2 
3 /*-
4  * Copyright (c) 1998 The NetBSD Foundation, Inc.
5  * All rights reserved.
6  *
7  * This code is derived from software contributed to The NetBSD Foundation
8  * by Eric Haszlakiewicz.
9  *
10  * Redistribution and use in source and binary forms, with or without
11  * modification, are permitted provided that the following conditions
12  * are met:
13  * 1. Redistributions of source code must retain the above copyright
14  *    notice, this list of conditions and the following disclaimer.
15  * 2. Redistributions in binary form must reproduce the above copyright
16  *    notice, this list of conditions and the following disclaimer in the
17  *    documentation and/or other materials provided with the distribution.
18  * 3. All advertising materials mentioning features or use of this software
19  *    must display the following acknowledgement:
20  *	This product includes software developed by the NetBSD
21  *	Foundation, Inc. and its contributors.
22  * 4. Neither the name of The NetBSD Foundation nor the names of its
23  *    contributors may be used to endorse or promote products derived
24  *    from this software without specific prior written permission.
25  *
26  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
27  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
28  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
29  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
30  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
31  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
32  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
33  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
34  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
35  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
36  * POSSIBILITY OF SUCH DAMAGE.
37  */
38 
39 #ifndef _M68K_LINUX_IOCTL_H
40 #define _M68K_LINUX_IOCTL_H
41 /* Note: Linux looks to have tried to switch to a structured way of defining
42  *	ioctls.  Doesn't look like they finished.  Some ioctls use these
43  *	defines.  Other are still just a number.  (But they could
44  *	probably be encoded as _LINUX_IO('T', #) )
45  */
46 #define	_LINUX_IOC_NRBITS	8
47 #define	_LINUX_IOC_TYPEBITS	8
48 #define	_LINUX_IOC_SIZEBITS	14
49 #define	_LINUX_IOC_DIRBITS	2
50 
51 #define	_LINUX_IOC_NRMASK	((1 << _LINUX_IOC_NRBITS) - 1)
52 #define	_LINUX_IOC_TYPEMASK	((1 << _LINUX_IOC_TYPEBITS) - 1)
53 #define	_LINUX_IOC_SIZEMAEK	((1 << _LINUX_IOC_SIZEBITS) - 1)
54 #define _LINUX_IOC_DIRMASK	((1 << _LINUX_IOC_DIRBITS) - 1)
55 
56 #define	_LINUX_IOC_NRSHIFT	0
57 #define	_LINUX_IOC_TYPESHIFT	(_LINUX_IOC_NRSHIFT + _LINUX_IOC_NRBITS)
58 #define	_LINUX_IOC_SIZESHIFT	(_LINUX_IOC_TYPESHIFT + _LINUX_IOC_TYPEBITS)
59 #define	_LINUX_IOC_DIRSHIFT	(_LINUX_IOC_SIZESHIFT + _LINUX_IOC_SIZEBITS)
60 
61 #define	_LINUX_IOC_NONE		0U
62 #define	_LINUX_IOC_READ		1U
63 #define	_LINUX_IOC_WRITE	2U
64 
65 #define	_LINUX_IOC(dir,type,nr,size)		\
66 	(((nr)   << _LINUX_IOC_NRSHIFT) |	\
67 	 ((type) << _LINUX_IOC_TYPESHIFT) |	\
68 	 ((size) << _LINUX_IOC_SIZESHIFT) |	\
69 	 ((dir)  << _LINUX_IOC_DIRSHIFT))
70 
71 #define _LINUX_IO(type,nr)		\
72 	_LINUX_IOC(_LINUX_IOC_NONE,(type),(nr),0)
73 #define	_LINUX_IOR(type,nr,size)	\
74 	_LINUX_IOC(_LINUX_IOC_READ,(type),(nr),sizeof(size))
75 #define	_LINUX_IOW(type,nr,size)	\
76 	_LINUX_IOC(_LINUX_IOC_WRITE,(type),(nr),sizeof(size))
77 #define	_LINUX_IOWR(type,nr,size)	\
78 	_LINUX_IOC(_LINUX_IOC_READ|_LINUX_IOC_WRITE,(type),(nr),sizeof(size))
79 
80 #define _LINUX_IOC_DIR(nr)	\
81 	(((nr) >> _LINUX_IOC_DIRSHIFT) & _LINUX_IOC_DIRMASK)
82 #define _LINUX_IOC_TYPE(nr)	\
83 	(((nr) >> _LINUX_IOC_TYPESHIFT) & _LINUX_IOC_TYPEMASK)
84 #define _LINUX_IOC_NR(nr)	\
85 	(((nr) >> _LINUX_IOC_NRSHIFT) & _LINUX_IOC_NRMASK)
86 #define _LINUX_IOC_SIZE(nr)	\
87 	(((nr) >> _LINUX_IOC_SIZESHIFT) & _LINUX_IOC_SIZEMASK)
88 
89 #define LINUX_IOCGROUP(x)	_LINUX_IOC_TYPE(x)
90 
91 #endif /* !_M68K_LINUX_IOCTL_H */
92