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linux_ioctl.h revision 1.1 
      1 /*	$NetBSD: linux_ioctl.h,v 1.1 1998/09/30 21:36:25 erh 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 _ALPHA_LINUX_IOCTL_H
     40 #define _ALPHA_LINUX_IOCTL_H
     41 
     42 /* Note: Linux looks to have tried to switch to a structured way of defining
     43  *	ioctls.  Doesn't look like they finished.  Some ioctls use these
     44  *	defines.  Other are still just a number.  (But they could
     45  *	probably be encoded as _LINUX_IO('T', #) )
     46  */
     47 #define	_LINUX_IOC_NRBITS	8
     48 #define	_LINUX_IOC_TYPEBITS	8
     49 #define	_LINUX_IOC_SIZEBITS	13
     50 #define	_LINUX_IOC_DIRBITS	3
     51 
     52 #define	_LINUX_IOC_NRMASK	((1 << _LINUX_IOC_NRBITS) - 1)
     53 #define	_LINUX_IOC_TYPEMASK	((1 << _LINUX_IOC_TYPEBITS) - 1)
     54 #define	_LINUX_IOC_SIZEMAEK	((1 << _LINUX_IOC_SIZEBITS) - 1)
     55 #define _LINUX_IOC_DIRMASK	((1 << _LINUX_IOC_DIRBITS) - 1)
     56 
     57 #define	_LINUX_IOC_NRSHIFT	0
     58 #define	_LINUX_IOC_TYPESHIFT	(_LINUX_IOC_NRSHIFT + _LINUX_IOC_NRBITS)
     59 #define	_LINUX_IOC_SIZESHIFT	(_LINUX_IOC_TYPESHIFT + _LINUX_IOC_TYPEBITS)
     60 #define	_LINUX_IOC_DIRSHIFT	(_LINUX_IOC_SIZESHIFT + _LINUX_IOC_SIZEBITS)
     61 
     62 #define	_LINUX_IOC_NONE		1U
     63 #define	_LINUX_IOC_READ		2U
     64 #define	_LINUX_IOC_WRITE	4U
     65 
     66 #define	_LINUX_IOC(dir,type,nr,size)		\
     67 	((unsigned int)				\
     68 	 (((nr)   << _LINUX_IOC_NRSHIFT) |	\
     69 	  ((type) << _LINUX_IOC_TYPESHIFT) |	\
     70 	  ((size) << _LINUX_IOC_SIZESHIFT) |	\
     71 	  ((dir)  << _LINUX_IOC_DIRSHIFT)))
     72 
     73 #define _LINUX_IO(type,nr)		\
     74 	_LINUX_IOC(_LINUX_IOC_NONE,(type),(nr),0)
     75 #define	_LINUX_IOR(type,nr,size)	\
     76 	_LINUX_IOC(_LINUX_IOC_READ,(type),(nr),sizeof(size))
     77 #define	_LINUX_IOW(type,nr,size)	\
     78 	_LINUX_IOC(_LINUX_IOC_WRITE,(type),(nr),sizeof(size))
     79 #define	_LINUX_IOWR(type,nr,size)	\
     80 	_LINUX_IOC(_LINUX_IOC_READ|_LINUX_IOC_WRITE,(type),(nr),sizeof(size))
     81 
     82 #define _LINUX_IOC_DIR(nr)	\
     83 	(((nr) >> _LINUX_IOC_DIRSHIFT) & _LINUX_IOC_DIRMASK)
     84 #define _LINUX_IOC_TYPE(nr)	\
     85 	(((nr) >> _LINUX_IOC_TYPESHIFT) & _LINUX_IOC_TYPEMASK)
     86 #define _LINUX_IOC_NR(nr)	\
     87 	(((nr) >> _LINUX_IOC_NRSHIFT) & _LINUX_IOC_NRMASK)
     88 #define _LINUX_IOC_SIZE(nr)	\
     89 	(((nr) >> _LINUX_IOC_SIZESHIFT) & _LINUX_IOC_SIZEMASK)
     90 
     91 #define LINUX_IOCGROUP(x)	_LINUX_IOC_TYPE(x)
     92 #endif /* !_ALPHA_LINUX_IOCTL_H */
     93