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authorLinus Torvalds <torvalds@ppc970.osdl.org>2005-04-16 18:20:36 -0400
committerLinus Torvalds <torvalds@ppc970.osdl.org>2005-04-16 18:20:36 -0400
commit1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 (patch)
tree0bba044c4ce775e45a88a51686b5d9f90697ea9d /include/asm-parisc/ioctl.h
Linux-2.6.12-rc2v2.6.12-rc2
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!
Diffstat (limited to 'include/asm-parisc/ioctl.h')
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diff --git a/include/asm-parisc/ioctl.h b/include/asm-parisc/ioctl.h
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1/*
2 * Linux/PA-RISC Project (http://www.parisc-linux.org/)
3 * Copyright (C) 1999,2003 Matthew Wilcox < willy at debian . org >
4 * portions from "linux/ioctl.h for Linux" by H.H. Bergman.
5 *
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License as published by
8 * the Free Software Foundation; either version 2 of the License, or
9 * (at your option) any later version.
10 *
11 * This program is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 * GNU General Public License for more details.
15 *
16 * You should have received a copy of the GNU General Public License
17 * along with this program; if not, write to the Free Software
18 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
19 */
20
21
22#ifndef _ASM_PARISC_IOCTL_H
23#define _ASM_PARISC_IOCTL_H
24
25/* ioctl command encoding: 32 bits total, command in lower 16 bits,
26 * size of the parameter structure in the lower 14 bits of the
27 * upper 16 bits.
28 * Encoding the size of the parameter structure in the ioctl request
29 * is useful for catching programs compiled with old versions
30 * and to avoid overwriting user space outside the user buffer area.
31 * The highest 2 bits are reserved for indicating the ``access mode''.
32 * NOTE: This limits the max parameter size to 16kB -1 !
33 */
34
35#define _IOC_NRBITS 8
36#define _IOC_TYPEBITS 8
37#define _IOC_SIZEBITS 14
38#define _IOC_DIRBITS 2
39
40#define _IOC_NRMASK ((1 << _IOC_NRBITS)-1)
41#define _IOC_TYPEMASK ((1 << _IOC_TYPEBITS)-1)
42#define _IOC_SIZEMASK ((1 << _IOC_SIZEBITS)-1)
43#define _IOC_DIRMASK ((1 << _IOC_DIRBITS)-1)
44
45#define _IOC_NRSHIFT 0
46#define _IOC_TYPESHIFT (_IOC_NRSHIFT+_IOC_NRBITS)
47#define _IOC_SIZESHIFT (_IOC_TYPESHIFT+_IOC_TYPEBITS)
48#define _IOC_DIRSHIFT (_IOC_SIZESHIFT+_IOC_SIZEBITS)
49
50/*
51 * Direction bits.
52 */
53#define _IOC_NONE 0U
54#define _IOC_WRITE 2U
55#define _IOC_READ 1U
56
57#define _IOC(dir,type,nr,size) \
58 (((dir) << _IOC_DIRSHIFT) | \
59 ((type) << _IOC_TYPESHIFT) | \
60 ((nr) << _IOC_NRSHIFT) | \
61 ((size) << _IOC_SIZESHIFT))
62
63/* provoke compile error for invalid uses of size argument */
64extern unsigned int __invalid_size_argument_for_IOC;
65#define _IOC_TYPECHECK(t) \
66 ((sizeof(t) == sizeof(t[1]) && \
67 sizeof(t) < (1 << _IOC_SIZEBITS)) ? \
68 sizeof(t) : __invalid_size_argument_for_IOC)
69
70/* used to create numbers */
71#define _IO(type,nr) _IOC(_IOC_NONE,(type),(nr),0)
72#define _IOR(type,nr,size) _IOC(_IOC_READ,(type),(nr),(_IOC_TYPECHECK(size)))
73#define _IOW(type,nr,size) _IOC(_IOC_WRITE,(type),(nr),(_IOC_TYPECHECK(size)))
74#define _IOWR(type,nr,size) _IOC(_IOC_READ|_IOC_WRITE,(type),(nr),(_IOC_TYPECHECK(size)))
75#define _IOR_BAD(type,nr,size) _IOC(_IOC_READ,(type),(nr),sizeof(size))
76#define _IOW_BAD(type,nr,size) _IOC(_IOC_WRITE,(type),(nr),sizeof(size))
77#define _IOWR_BAD(type,nr,size) _IOC(_IOC_READ|_IOC_WRITE,(type),(nr),sizeof(size))
78
79/* used to decode ioctl numbers.. */
80#define _IOC_DIR(nr) (((nr) >> _IOC_DIRSHIFT) & _IOC_DIRMASK)
81#define _IOC_TYPE(nr) (((nr) >> _IOC_TYPESHIFT) & _IOC_TYPEMASK)
82#define _IOC_NR(nr) (((nr) >> _IOC_NRSHIFT) & _IOC_NRMASK)
83#define _IOC_SIZE(nr) (((nr) >> _IOC_SIZESHIFT) & _IOC_SIZEMASK)
84
85/* ...and for the drivers/sound files... */
86
87#define IOC_IN (_IOC_WRITE << _IOC_DIRSHIFT)
88#define IOC_OUT (_IOC_READ << _IOC_DIRSHIFT)
89#define IOC_INOUT ((_IOC_WRITE|_IOC_READ) << _IOC_DIRSHIFT)
90#define IOCSIZE_MASK (_IOC_SIZEMASK << _IOC_SIZESHIFT)
91#define IOCSIZE_SHIFT (_IOC_SIZESHIFT)
92
93#endif /* _ASM_PARISC_IOCTL_H */