ioctl.h
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上传日期:2013-02-24
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- /* $Id: ioctl.h,v 1.6 1999/12/01 23:58:36 davem Exp $ */
- #ifndef _SPARC_IOCTL_H
- #define _SPARC_IOCTL_H
- #define _IOC_NRBITS 8
- #define _IOC_TYPEBITS 8
- #define _IOC_SIZEBITS 8
- #define _IOC_RESVBITS 5
- #define _IOC_DIRBITS 3
- #define _IOC_NRMASK ((1 << _IOC_NRBITS)-1)
- #define _IOC_TYPEMASK ((1 << _IOC_TYPEBITS)-1)
- #define _IOC_RESVMASK ((1 << _IOC_RESVBITS)-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_RESVSHIFT (_IOC_SIZESHIFT + _IOC_SIZEBITS)
- #define _IOC_DIRSHIFT (_IOC_RESVSHIFT + _IOC_RESVBITS)
- #define _IOC_NONE 1U
- #define _IOC_READ 2U
- #define _IOC_WRITE 4U
- #define _IOC(dir,type,nr,size)
- (((dir) << _IOC_DIRSHIFT) |
- ((type) << _IOC_TYPESHIFT) |
- ((nr) << _IOC_NRSHIFT) |
- ((size) << _IOC_SIZESHIFT))
- #define _IO(type,nr) _IOC(_IOC_NONE,(type),(nr),0)
- #define _IOR(type,nr,size) _IOC(_IOC_READ,(type),(nr),sizeof(size))
- #define _IOW(type,nr,size) _IOC(_IOC_WRITE,(type),(nr),sizeof(size))
- #define _IOWR(type,nr,size) _IOC(_IOC_READ|_IOC_WRITE,(type),(nr),sizeof(size))
- #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 PCMCIA... */
- #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 /* !(_SPARC_IOCTL_H) */