include/asm-sparc/ioctl.h

   1 /* $Id: ioctl.h,v 1.6 1999/12/01 23:58:36 davem Exp $ */
   2 #ifndef _SPARC_IOCTL_H
   3 #define _SPARC_IOCTL_H
   4
   5 #define _IOC_NRBITS      8
   6 #define _IOC_TYPEBITS    8
   7 #define _IOC_SIZEBITS    8
   8 #define _IOC_RESVBITS    5
   9 #define _IOC_DIRBITS     3
  10
  11 #define _IOC_NRMASK      ((1 << _IOC_NRBITS)-1)
  12 #define _IOC_TYPEMASK    ((1 << _IOC_TYPEBITS)-1)
  13 #define _IOC_RESVMASK    ((1 << _IOC_RESVBITS)-1)
  14 #define _IOC_SIZEMASK    ((1 << _IOC_SIZEBITS)-1)
  15 #define _IOC_DIRMASK     ((1 << _IOC_DIRBITS)-1)
  16
  17 #define _IOC_NRSHIFT     0
  18 #define _IOC_TYPESHIFT   (_IOC_NRSHIFT + _IOC_NRBITS)
  19 #define _IOC_SIZESHIFT   (_IOC_TYPESHIFT + _IOC_TYPEBITS)
  20 #define _IOC_RESVSHIFT   (_IOC_SIZESHIFT + _IOC_SIZEBITS)
  21 #define _IOC_DIRSHIFT    (_IOC_RESVSHIFT + _IOC_RESVBITS)
  22
  23 #define _IOC_NONE        1U
  24 #define _IOC_READ        2U
  25 #define _IOC_WRITE       4U
  26
  27 #define _IOC(dir,type,nr,size) \
  28         (((dir)  << _IOC_DIRSHIFT) | \
  29          ((type) << _IOC_TYPESHIFT) | \
  30          ((nr)   << _IOC_NRSHIFT) | \
  31          ((size) << _IOC_SIZESHIFT))
  32
  33 #define _IO(type,nr)        _IOC(_IOC_NONE,(type),(nr),0)
  34 #define _IOR(type,nr,size)  _IOC(_IOC_READ,(type),(nr),sizeof(size))
  35 #define _IOW(type,nr,size)  _IOC(_IOC_WRITE,(type),(nr),sizeof(size))
  36 #define _IOWR(type,nr,size) _IOC(_IOC_READ|_IOC_WRITE,(type),(nr),sizeof(size))
  37
  38 #define _IOC_DIR(nr)        (((nr) >> _IOC_DIRSHIFT) & _IOC_DIRMASK)
  39 #define _IOC_TYPE(nr)       (((nr) >> _IOC_TYPESHIFT) & _IOC_TYPEMASK)
  40 #define _IOC_NR(nr)         (((nr) >> _IOC_NRSHIFT) & _IOC_NRMASK)
  41 #define _IOC_SIZE(nr)       (((nr) >> _IOC_SIZESHIFT) & _IOC_SIZEMASK)
  42
  43 /* ...and for the PCMCIA... */
  44
  45 #define IOC_IN          (_IOC_WRITE << _IOC_DIRSHIFT)
  46 #define IOC_OUT         (_IOC_READ << _IOC_DIRSHIFT)
  47 #define IOC_INOUT       ((_IOC_WRITE|_IOC_READ) << _IOC_DIRSHIFT)
  48 #define IOCSIZE_MASK    (_IOC_SIZEMASK << _IOC_SIZESHIFT)
  49 #define IOCSIZE_SHIFT   (_IOC_SIZESHIFT)
  50
  51 #endif /* !(_SPARC_IOCTL_H) */