1da177e4c3
Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
69 lines
2.6 KiB
C
69 lines
2.6 KiB
C
/* $Id: ioctl.h,v 1.6 1999/12/01 23:58:36 davem Exp $ */
|
|
#ifndef _SPARC_IOCTL_H
|
|
#define _SPARC_IOCTL_H
|
|
|
|
/*
|
|
* Our DIR and SIZE overlap in order to simulteneously provide
|
|
* a non-zero _IOC_NONE (for binary compatibility) and
|
|
* 14 bits of size as on i386. Here's the layout:
|
|
*
|
|
* 0xE0000000 DIR
|
|
* 0x80000000 DIR = WRITE
|
|
* 0x40000000 DIR = READ
|
|
* 0x20000000 DIR = NONE
|
|
* 0x3FFF0000 SIZE (overlaps NONE bit)
|
|
* 0x0000FF00 TYPE
|
|
* 0x000000FF NR (CMD)
|
|
*/
|
|
|
|
#define _IOC_NRBITS 8
|
|
#define _IOC_TYPEBITS 8
|
|
#define _IOC_SIZEBITS 13 /* Actually 14, see below. */
|
|
#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_XSIZEMASK ((1 << (_IOC_SIZEBITS+1))-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)
|
|
|
|
#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))
|
|
|
|
/* Used to decode ioctl numbers in drivers despite the leading underscore... */
|
|
#define _IOC_DIR(nr) \
|
|
( (((((nr) >> _IOC_DIRSHIFT) & _IOC_DIRMASK) & (_IOC_WRITE|_IOC_READ)) != 0)? \
|
|
(((nr) >> _IOC_DIRSHIFT) & (_IOC_WRITE|_IOC_READ)): \
|
|
(((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_DIRSHIFT) & _IOC_DIRMASK) & (_IOC_WRITE|_IOC_READ)) == 0)? \
|
|
0: (((nr) >> _IOC_SIZESHIFT) & _IOC_XSIZEMASK))
|
|
|
|
/* ...and for the PCMCIA and sound. */
|
|
#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_XSIZEMASK << _IOC_SIZESHIFT)
|
|
#define IOCSIZE_SHIFT (_IOC_SIZESHIFT)
|
|
|
|
#endif /* !(_SPARC_IOCTL_H) */
|