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1/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
2#ifndef _SPARC_IOCTL_H
3#define _SPARC_IOCTL_H
4
5/*
6 * Our DIR and SIZE overlap in order to simulteneously provide
7 * a non-zero _IOC_NONE (for binary compatibility) and
8 * 14 bits of size as on i386. Here's the layout:
9 *
10 * 0xE0000000 DIR
11 * 0x80000000 DIR = WRITE
12 * 0x40000000 DIR = READ
13 * 0x20000000 DIR = NONE
14 * 0x3FFF0000 SIZE (overlaps NONE bit)
15 * 0x0000FF00 TYPE
16 * 0x000000FF NR (CMD)
17 */
18
19#define _IOC_NRBITS 8
20#define _IOC_TYPEBITS 8
21#define _IOC_SIZEBITS 13 /* Actually 14, see below. */
22#define _IOC_DIRBITS 3
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_XSIZEMASK ((1 << (_IOC_SIZEBITS+1))-1)
28#define _IOC_DIRMASK ((1 << _IOC_DIRBITS)-1)
29
30#define _IOC_NRSHIFT 0
31#define _IOC_TYPESHIFT (_IOC_NRSHIFT + _IOC_NRBITS)
32#define _IOC_SIZESHIFT (_IOC_TYPESHIFT + _IOC_TYPEBITS)
33#define _IOC_DIRSHIFT (_IOC_SIZESHIFT + _IOC_SIZEBITS)
34
35#define _IOC_NONE 1U
36#define _IOC_READ 2U
37#define _IOC_WRITE 4U
38
39#define _IOC(dir,type,nr,size) \
40 (((dir) << _IOC_DIRSHIFT) | \
41 ((type) << _IOC_TYPESHIFT) | \
42 ((nr) << _IOC_NRSHIFT) | \
43 ((size) << _IOC_SIZESHIFT))
44
45#define _IO(type,nr) _IOC(_IOC_NONE,(type),(nr),0)
46#define _IOR(type,nr,size) _IOC(_IOC_READ,(type),(nr),sizeof(size))
47#define _IOW(type,nr,size) _IOC(_IOC_WRITE,(type),(nr),sizeof(size))
48#define _IOWR(type,nr,size) _IOC(_IOC_READ|_IOC_WRITE,(type),(nr),sizeof(size))
49
50/* Used to decode ioctl numbers in drivers despite the leading underscore... */
51#define _IOC_DIR(nr) \
52 ( (((((nr) >> _IOC_DIRSHIFT) & _IOC_DIRMASK) & (_IOC_WRITE|_IOC_READ)) != 0)? \
53 (((nr) >> _IOC_DIRSHIFT) & (_IOC_WRITE|_IOC_READ)): \
54 (((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) \
58 ((((((nr) >> _IOC_DIRSHIFT) & _IOC_DIRMASK) & (_IOC_WRITE|_IOC_READ)) == 0)? \
59 0: (((nr) >> _IOC_SIZESHIFT) & _IOC_XSIZEMASK))
60
61/* ...and for the PCMCIA and sound. */
62#define IOC_IN (_IOC_WRITE << _IOC_DIRSHIFT)
63#define IOC_OUT (_IOC_READ << _IOC_DIRSHIFT)
64#define IOC_INOUT ((_IOC_WRITE|_IOC_READ) << _IOC_DIRSHIFT)
65#define IOCSIZE_MASK (_IOC_XSIZEMASK << _IOC_SIZESHIFT)
66#define IOCSIZE_SHIFT (_IOC_SIZESHIFT)
67
68#endif /* !(_SPARC_IOCTL_H) */
1#ifndef _SPARC_IOCTL_H
2#define _SPARC_IOCTL_H
3
4/*
5 * Our DIR and SIZE overlap in order to simulteneously provide
6 * a non-zero _IOC_NONE (for binary compatibility) and
7 * 14 bits of size as on i386. Here's the layout:
8 *
9 * 0xE0000000 DIR
10 * 0x80000000 DIR = WRITE
11 * 0x40000000 DIR = READ
12 * 0x20000000 DIR = NONE
13 * 0x3FFF0000 SIZE (overlaps NONE bit)
14 * 0x0000FF00 TYPE
15 * 0x000000FF NR (CMD)
16 */
17
18#define _IOC_NRBITS 8
19#define _IOC_TYPEBITS 8
20#define _IOC_SIZEBITS 13 /* Actually 14, see below. */
21#define _IOC_DIRBITS 3
22
23#define _IOC_NRMASK ((1 << _IOC_NRBITS)-1)
24#define _IOC_TYPEMASK ((1 << _IOC_TYPEBITS)-1)
25#define _IOC_SIZEMASK ((1 << _IOC_SIZEBITS)-1)
26#define _IOC_XSIZEMASK ((1 << (_IOC_SIZEBITS+1))-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#define _IOC_NONE 1U
35#define _IOC_READ 2U
36#define _IOC_WRITE 4U
37
38#define _IOC(dir,type,nr,size) \
39 (((dir) << _IOC_DIRSHIFT) | \
40 ((type) << _IOC_TYPESHIFT) | \
41 ((nr) << _IOC_NRSHIFT) | \
42 ((size) << _IOC_SIZESHIFT))
43
44#define _IO(type,nr) _IOC(_IOC_NONE,(type),(nr),0)
45#define _IOR(type,nr,size) _IOC(_IOC_READ,(type),(nr),sizeof(size))
46#define _IOW(type,nr,size) _IOC(_IOC_WRITE,(type),(nr),sizeof(size))
47#define _IOWR(type,nr,size) _IOC(_IOC_READ|_IOC_WRITE,(type),(nr),sizeof(size))
48
49/* Used to decode ioctl numbers in drivers despite the leading underscore... */
50#define _IOC_DIR(nr) \
51 ( (((((nr) >> _IOC_DIRSHIFT) & _IOC_DIRMASK) & (_IOC_WRITE|_IOC_READ)) != 0)? \
52 (((nr) >> _IOC_DIRSHIFT) & (_IOC_WRITE|_IOC_READ)): \
53 (((nr) >> _IOC_DIRSHIFT) & _IOC_DIRMASK) )
54#define _IOC_TYPE(nr) (((nr) >> _IOC_TYPESHIFT) & _IOC_TYPEMASK)
55#define _IOC_NR(nr) (((nr) >> _IOC_NRSHIFT) & _IOC_NRMASK)
56#define _IOC_SIZE(nr) \
57 ((((((nr) >> _IOC_DIRSHIFT) & _IOC_DIRMASK) & (_IOC_WRITE|_IOC_READ)) == 0)? \
58 0: (((nr) >> _IOC_SIZESHIFT) & _IOC_XSIZEMASK))
59
60/* ...and for the PCMCIA and sound. */
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_XSIZEMASK << _IOC_SIZESHIFT)
65#define IOCSIZE_SHIFT (_IOC_SIZESHIFT)
66
67#endif /* !(_SPARC_IOCTL_H) */