| 1 |
1275 |
phoenix |
/* $Id: ioctl.h,v 1.1.1.1 2004-04-15 02:38:47 phoenix Exp $
|
| 2 |
|
|
*
|
| 3 |
|
|
* linux/ioctl.h for Linux by H.H. Bergman.
|
| 4 |
|
|
*/
|
| 5 |
|
|
|
| 6 |
|
|
#ifndef _ASM_PARISC_IOCTL_H
|
| 7 |
|
|
#define _ASM_PARISC_IOCTL_H
|
| 8 |
|
|
|
| 9 |
|
|
/* ioctl command encoding: 32 bits total, command in lower 16 bits,
|
| 10 |
|
|
* size of the parameter structure in the lower 14 bits of the
|
| 11 |
|
|
* upper 16 bits.
|
| 12 |
|
|
* Encoding the size of the parameter structure in the ioctl request
|
| 13 |
|
|
* is useful for catching programs compiled with old versions
|
| 14 |
|
|
* and to avoid overwriting user space outside the user buffer area.
|
| 15 |
|
|
* The highest 2 bits are reserved for indicating the ``access mode''.
|
| 16 |
|
|
* NOTE: This limits the max parameter size to 16kB -1 !
|
| 17 |
|
|
*/
|
| 18 |
|
|
|
| 19 |
|
|
#define _IOC_NRBITS 8
|
| 20 |
|
|
#define _IOC_TYPEBITS 8
|
| 21 |
|
|
#define _IOC_SIZEBITS 14
|
| 22 |
|
|
#define _IOC_DIRBITS 2
|
| 23 |
|
|
|
| 24 |
|
|
#define _IOC_NRMASK ((1 << _IOC_NRBITS)-1)
|
| 25 |
|
|
#define _IOC_TYPEMASK ((1 << _IOC_TYPEBITS)-1)
|
| 26 |
|
|
#define _IOC_SIZEMASK ((1 << _IOC_SIZEBITS)-1)
|
| 27 |
|
|
#define _IOC_DIRMASK ((1 << _IOC_DIRBITS)-1)
|
| 28 |
|
|
|
| 29 |
|
|
#define _IOC_NRSHIFT 0
|
| 30 |
|
|
#define _IOC_TYPESHIFT (_IOC_NRSHIFT+_IOC_NRBITS)
|
| 31 |
|
|
#define _IOC_SIZESHIFT (_IOC_TYPESHIFT+_IOC_TYPEBITS)
|
| 32 |
|
|
#define _IOC_DIRSHIFT (_IOC_SIZESHIFT+_IOC_SIZEBITS)
|
| 33 |
|
|
|
| 34 |
|
|
/*
|
| 35 |
|
|
* Direction bits.
|
| 36 |
|
|
*/
|
| 37 |
|
|
#define _IOC_NONE 0U
|
| 38 |
|
|
#define _IOC_WRITE 2U
|
| 39 |
|
|
#define _IOC_READ 1U
|
| 40 |
|
|
|
| 41 |
|
|
#define _IOC(dir,type,nr,size) \
|
| 42 |
|
|
(((dir) << _IOC_DIRSHIFT) | \
|
| 43 |
|
|
((type) << _IOC_TYPESHIFT) | \
|
| 44 |
|
|
((nr) << _IOC_NRSHIFT) | \
|
| 45 |
|
|
((size) << _IOC_SIZESHIFT))
|
| 46 |
|
|
|
| 47 |
|
|
/* used to create numbers */
|
| 48 |
|
|
#define _IO(type,nr) _IOC(_IOC_NONE,(type),(nr),0)
|
| 49 |
|
|
#define _IOR(type,nr,size) _IOC(_IOC_READ,(type),(nr),sizeof(size))
|
| 50 |
|
|
#define _IOW(type,nr,size) _IOC(_IOC_WRITE,(type),(nr),sizeof(size))
|
| 51 |
|
|
#define _IOWR(type,nr,size) _IOC(_IOC_READ|_IOC_WRITE,(type),(nr),sizeof(size))
|
| 52 |
|
|
|
| 53 |
|
|
/* used to decode ioctl numbers.. */
|
| 54 |
|
|
#define _IOC_DIR(nr) (((nr) >> _IOC_DIRSHIFT) & _IOC_DIRMASK)
|
| 55 |
|
|
#define _IOC_TYPE(nr) (((nr) >> _IOC_TYPESHIFT) & _IOC_TYPEMASK)
|
| 56 |
|
|
#define _IOC_NR(nr) (((nr) >> _IOC_NRSHIFT) & _IOC_NRMASK)
|
| 57 |
|
|
#define _IOC_SIZE(nr) (((nr) >> _IOC_SIZESHIFT) & _IOC_SIZEMASK)
|
| 58 |
|
|
|
| 59 |
|
|
/* ...and for the drivers/sound files... */
|
| 60 |
|
|
|
| 61 |
|
|
#define IOC_IN (_IOC_WRITE << _IOC_DIRSHIFT)
|
| 62 |
|
|
#define IOC_OUT (_IOC_READ << _IOC_DIRSHIFT)
|
| 63 |
|
|
#define IOC_INOUT ((_IOC_WRITE|_IOC_READ) << _IOC_DIRSHIFT)
|
| 64 |
|
|
#define IOCSIZE_MASK (_IOC_SIZEMASK << _IOC_SIZESHIFT)
|
| 65 |
|
|
#define IOCSIZE_SHIFT (_IOC_SIZESHIFT)
|
| 66 |
|
|
|
| 67 |
|
|
#endif /* _ASM_PARISC_IOCTL_H */
|
