/* *    Linux/PA-RISC Project (http://www.parisc-linux.org/) *    Copyright (C) 1999,2003 Matthew Wilcox < willy at debian . org > *    portions from "linux/ioctl.h for Linux" by H.H. Bergman. * *    This program is free software; you can redistribute it and/or modify *    it under the terms of the GNU General Public License as published by *    the Free Software Foundation; either version 2 of the License, or *    (at your option) any later version. * *    This program is distributed in the hope that it will be useful, *    but WITHOUT ANY WARRANTY; without even the implied warranty of *    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the *    GNU General Public License for more details. * *    You should have received a copy of the GNU General Public License *    along with this program; if not, write to the Free Software *    Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA */  #ifndef _ASM_PARISC_IOCTL_H#define _ASM_PARISC_IOCTL_H /* ioctl command encoding: 32 bits total, command in lower 16 bits, * size of the parameter structure in the lower 14 bits of the * upper 16 bits. * Encoding the size of the parameter structure in the ioctl request * is useful for catching programs compiled with old versions * and to avoid overwriting user space outside the user buffer area. * The highest 2 bits are reserved for indicating the ``access mode''. * NOTE: This limits the max parameter size to 16kB -1 ! */ #define _IOC_NRBITS	8#define _IOC_TYPEBITS	8#define _IOC_SIZEBITS	14#define _IOC_DIRBITS	2 #define _IOC_NRMASK	((1 << _IOC_NRBITS)-1)#define _IOC_TYPEMASK	((1 << _IOC_TYPEBITS)-1)#define _IOC_SIZEMASK	((1 << _IOC_SIZEBITS)-1)#define _IOC_DIRMASK	((1 << _IOC_DIRBITS)-1) #define _IOC_NRSHIFT	0#define _IOC_TYPESHIFT	(_IOC_NRSHIFT+_IOC_NRBITS)#define _IOC_SIZESHIFT	(_IOC_TYPESHIFT+_IOC_TYPEBITS)#define _IOC_DIRSHIFT	(_IOC_SIZESHIFT+_IOC_SIZEBITS) /* * Direction bits. */#define _IOC_NONE	0U#define _IOC_WRITE	2U#define _IOC_READ	1U #define _IOC(dir,type,nr,size) \	(((dir)  << _IOC_DIRSHIFT) | \	 ((type) << _IOC_TYPESHIFT) | \	 ((nr)   << _IOC_NRSHIFT) | \	 ((size) << _IOC_SIZESHIFT)) /* provoke compile error for invalid uses of size argument */extern unsigned int __invalid_size_argument_for_IOC;#define _IOC_TYPECHECK(t) \	((sizeof(t) == sizeof(t[1]) && \	  sizeof(t) < (1 << _IOC_SIZEBITS)) ? \	  sizeof(t) : __invalid_size_argument_for_IOC) /* used to create numbers */#define _IO(type,nr)		_IOC(_IOC_NONE,(type),(nr),0)#define _IOR(type,nr,size)	_IOC(_IOC_READ,(type),(nr),(_IOC_TYPECHECK(size)))#define _IOW(type,nr,size)	_IOC(_IOC_WRITE,(type),(nr),(_IOC_TYPECHECK(size)))#define _IOWR(type,nr,size)	_IOC(_IOC_READ|_IOC_WRITE,(type),(nr),(_IOC_TYPECHECK(size)))#define _IOR_BAD(type,nr,size)	_IOC(_IOC_READ,(type),(nr),sizeof(size))#define _IOW_BAD(type,nr,size)	_IOC(_IOC_WRITE,(type),(nr),sizeof(size))#define _IOWR_BAD(type,nr,size)	_IOC(_IOC_READ|_IOC_WRITE,(type),(nr),sizeof(size)) /* used to decode ioctl numbers.. */#define _IOC_DIR(nr)		(((nr) >> _IOC_DIRSHIFT) & _IOC_DIRMASK)#define _IOC_TYPE(nr)		(((nr) >> _IOC_TYPESHIFT) & _IOC_TYPEMASK)#define _IOC_NR(nr)		(((nr) >> _IOC_NRSHIFT) & _IOC_NRMASK)#define _IOC_SIZE(nr)		(((nr) >> _IOC_SIZESHIFT) & _IOC_SIZEMASK) /* ...and for the drivers/sound files... */ #define IOC_IN		(_IOC_WRITE << _IOC_DIRSHIFT)#define IOC_OUT		(_IOC_READ << _IOC_DIRSHIFT)#define IOC_INOUT	((_IOC_WRITE|_IOC_READ) << _IOC_DIRSHIFT)#define IOCSIZE_MASK	(_IOC_SIZEMASK << _IOC_SIZESHIFT)#define IOCSIZE_SHIFT	(_IOC_SIZESHIFT) #endif /* _ASM_PARISC_IOCTL_H */