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) */
52
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