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authorBrian Gerst <bgerst@didntduck.org>2006-01-09 23:52:18 -0500
committerLinus Torvalds <torvalds@g5.osdl.org>2006-01-10 11:01:34 -0500
commitaf4cd3fe4cfa75ca74f8d8622867371289043a8d (patch)
tree70dc7836a98758578628a96dc609a0c67f78dffb /include/asm-sh64
parent7ff92053ddff48d9d7908a353bd85f893944463e (diff)
[PATCH] Generic ioctl.h
Most arches copied the i386 ioctl.h. Combine them into a generic header. Signed-off-by: Brian Gerst <bgerst@didntduck.org> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'include/asm-sh64')
-rw-r--r--include/asm-sh64/ioctl.h84
1 files changed, 1 insertions, 83 deletions
diff --git a/include/asm-sh64/ioctl.h b/include/asm-sh64/ioctl.h
index c089a6fb78e0..b279fe06dfe5 100644
--- a/include/asm-sh64/ioctl.h
+++ b/include/asm-sh64/ioctl.h
@@ -1,83 +1 @@
1#ifndef __ASM_SH64_IOCTL_H #include <asm-generic/ioctl.h>
2#define __ASM_SH64_IOCTL_H
3
4/*
5 * This file is subject to the terms and conditions of the GNU General Public
6 * License. See the file "COPYING" in the main directory of this archive
7 * for more details.
8 *
9 * include/asm-sh64/ioctl.h
10 *
11 * Copyright (C) 2000, 2001 Paolo Alberelli
12 *
13 * linux/ioctl.h for Linux by H.H. Bergman.
14 *
15 */
16
17/* ioctl command encoding: 32 bits total, command in lower 16 bits,
18 * size of the parameter structure in the lower 14 bits of the
19 * upper 16 bits.
20 * Encoding the size of the parameter structure in the ioctl request
21 * is useful for catching programs compiled with old versions
22 * and to avoid overwriting user space outside the user buffer area.
23 * The highest 2 bits are reserved for indicating the ``access mode''.
24 * NOTE: This limits the max parameter size to 16kB -1 !
25 */
26
27/*
28 * The following is for compatibility across the various Linux
29 * platforms. The i386 ioctl numbering scheme doesn't really enforce
30 * a type field. De facto, however, the top 8 bits of the lower 16
31 * bits are indeed used as a type field, so we might just as well make
32 * this explicit here. Please be sure to use the decoding macros
33 * below from now on.
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 1U
55#define _IOC_READ 2U
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/* used to create numbers */
64#define _IO(type,nr) _IOC(_IOC_NONE,(type),(nr),0)
65#define _IOR(type,nr,size) _IOC(_IOC_READ,(type),(nr),sizeof(size))
66#define _IOW(type,nr,size) _IOC(_IOC_WRITE,(type),(nr),sizeof(size))
67#define _IOWR(type,nr,size) _IOC(_IOC_READ|_IOC_WRITE,(type),(nr),sizeof(size))
68
69/* used to decode ioctl numbers.. */
70#define _IOC_DIR(nr) (((nr) >> _IOC_DIRSHIFT) & _IOC_DIRMASK)
71#define _IOC_TYPE(nr) (((nr) >> _IOC_TYPESHIFT) & _IOC_TYPEMASK)
72#define _IOC_NR(nr) (((nr) >> _IOC_NRSHIFT) & _IOC_NRMASK)
73#define _IOC_SIZE(nr) (((nr) >> _IOC_SIZESHIFT) & _IOC_SIZEMASK)
74
75/* ...and for the drivers/sound files... */
76
77#define IOC_IN (_IOC_WRITE << _IOC_DIRSHIFT)
78#define IOC_OUT (_IOC_READ << _IOC_DIRSHIFT)
79#define IOC_INOUT ((_IOC_WRITE|_IOC_READ) << _IOC_DIRSHIFT)
80#define IOCSIZE_MASK (_IOC_SIZEMASK << _IOC_SIZESHIFT)
81#define IOCSIZE_SHIFT (_IOC_SIZESHIFT)
82
83#endif /* __ASM_SH64_IOCTL_H */