93 lines
3.9 KiB
C
93 lines
3.9 KiB
C
/* $NetBSD: linux_ioctl.h,v 1.1 1998/09/30 21:36:25 erh Exp $ */
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/*-
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* Copyright (c) 1998 The NetBSD Foundation, Inc.
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* All rights reserved.
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*
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* This code is derived from software contributed to The NetBSD Foundation
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* by Eric Haszlakiewicz.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the NetBSD
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* Foundation, Inc. and its contributors.
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* 4. Neither the name of The NetBSD Foundation nor the names of its
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* contributors may be used to endorse or promote products derived
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* from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
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* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
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* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
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* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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#ifndef _ALPHA_LINUX_IOCTL_H
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#define _ALPHA_LINUX_IOCTL_H
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/* Note: Linux looks to have tried to switch to a structured way of defining
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* ioctls. Doesn't look like they finished. Some ioctls use these
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* defines. Other are still just a number. (But they could
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* probably be encoded as _LINUX_IO('T', #) )
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*/
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#define _LINUX_IOC_NRBITS 8
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#define _LINUX_IOC_TYPEBITS 8
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#define _LINUX_IOC_SIZEBITS 13
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#define _LINUX_IOC_DIRBITS 3
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#define _LINUX_IOC_NRMASK ((1 << _LINUX_IOC_NRBITS) - 1)
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#define _LINUX_IOC_TYPEMASK ((1 << _LINUX_IOC_TYPEBITS) - 1)
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#define _LINUX_IOC_SIZEMAEK ((1 << _LINUX_IOC_SIZEBITS) - 1)
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#define _LINUX_IOC_DIRMASK ((1 << _LINUX_IOC_DIRBITS) - 1)
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#define _LINUX_IOC_NRSHIFT 0
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#define _LINUX_IOC_TYPESHIFT (_LINUX_IOC_NRSHIFT + _LINUX_IOC_NRBITS)
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#define _LINUX_IOC_SIZESHIFT (_LINUX_IOC_TYPESHIFT + _LINUX_IOC_TYPEBITS)
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#define _LINUX_IOC_DIRSHIFT (_LINUX_IOC_SIZESHIFT + _LINUX_IOC_SIZEBITS)
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#define _LINUX_IOC_NONE 1U
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#define _LINUX_IOC_READ 2U
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#define _LINUX_IOC_WRITE 4U
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#define _LINUX_IOC(dir,type,nr,size) \
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((unsigned int) \
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(((nr) << _LINUX_IOC_NRSHIFT) | \
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((type) << _LINUX_IOC_TYPESHIFT) | \
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((size) << _LINUX_IOC_SIZESHIFT) | \
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((dir) << _LINUX_IOC_DIRSHIFT)))
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#define _LINUX_IO(type,nr) \
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_LINUX_IOC(_LINUX_IOC_NONE,(type),(nr),0)
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#define _LINUX_IOR(type,nr,size) \
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_LINUX_IOC(_LINUX_IOC_READ,(type),(nr),sizeof(size))
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#define _LINUX_IOW(type,nr,size) \
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_LINUX_IOC(_LINUX_IOC_WRITE,(type),(nr),sizeof(size))
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#define _LINUX_IOWR(type,nr,size) \
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_LINUX_IOC(_LINUX_IOC_READ|_LINUX_IOC_WRITE,(type),(nr),sizeof(size))
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#define _LINUX_IOC_DIR(nr) \
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(((nr) >> _LINUX_IOC_DIRSHIFT) & _LINUX_IOC_DIRMASK)
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#define _LINUX_IOC_TYPE(nr) \
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(((nr) >> _LINUX_IOC_TYPESHIFT) & _LINUX_IOC_TYPEMASK)
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#define _LINUX_IOC_NR(nr) \
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(((nr) >> _LINUX_IOC_NRSHIFT) & _LINUX_IOC_NRMASK)
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#define _LINUX_IOC_SIZE(nr) \
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(((nr) >> _LINUX_IOC_SIZESHIFT) & _LINUX_IOC_SIZEMASK)
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#define LINUX_IOCGROUP(x) _LINUX_IOC_TYPE(x)
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#endif /* !_ALPHA_LINUX_IOCTL_H */
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