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#ifndef _PPC_IOCTL_H

#define _PPC_IOCTL_H

/*

 * this was copied from the alpha as it's a bit cleaner there.

 *                         -- Cort

 */

#define _IOC_NRBITS     8

#define _IOC_TYPEBITS   8

#define _IOC_SIZEBITS   13

#define _IOC_DIRBITS    3

#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 _IOC_NONE could be 0, but OSF/1 gives it a bit.

 * And this turns out useful to catch old ioctl numbers in header

 * files for us.

 */

#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))

/* used to create numbers */

#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))

/* used to decode them.. */

#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)

#endif