diff options
author | Brian Gerst <bgerst@didntduck.org> | 2006-01-09 23:52:18 -0500 |
---|---|---|
committer | Linus Torvalds <torvalds@g5.osdl.org> | 2006-01-10 11:01:34 -0500 |
commit | af4cd3fe4cfa75ca74f8d8622867371289043a8d (patch) | |
tree | 70dc7836a98758578628a96dc609a0c67f78dffb /include/asm-cris | |
parent | 7ff92053ddff48d9d7908a353bd85f893944463e (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-cris')
-rw-r--r-- | include/asm-cris/ioctl.h | 84 |
1 files changed, 1 insertions, 83 deletions
diff --git a/include/asm-cris/ioctl.h b/include/asm-cris/ioctl.h index be2d8f667a38..b279fe06dfe5 100644 --- a/include/asm-cris/ioctl.h +++ b/include/asm-cris/ioctl.h | |||
@@ -1,83 +1 @@ | |||
1 | /* | #include <asm-generic/ioctl.h> | |
2 | * linux/ioctl.h for Linux by H.H. Bergman. | ||
3 | * | ||
4 | * This is the same as the i386 version. | ||
5 | */ | ||
6 | |||
7 | #ifndef _ASMCRIS_IOCTL_H | ||
8 | #define _ASMCRIS_IOCTL_H | ||
9 | |||
10 | /* ioctl command encoding: 32 bits total, command in lower 16 bits, | ||
11 | * size of the parameter structure in the lower 14 bits of the | ||
12 | * upper 16 bits. | ||
13 | * Encoding the size of the parameter structure in the ioctl request | ||
14 | * is useful for catching programs compiled with old versions | ||
15 | * and to avoid overwriting user space outside the user buffer area. | ||
16 | * The highest 2 bits are reserved for indicating the ``access mode''. | ||
17 | * NOTE: This limits the max parameter size to 16kB -1 ! | ||
18 | */ | ||
19 | |||
20 | /* | ||
21 | * The following is for compatibility across the various Linux | ||
22 | * platforms. The i386 ioctl numbering scheme doesn't really enforce | ||
23 | * a type field. De facto, however, the top 8 bits of the lower 16 | ||
24 | * bits are indeed used as a type field, so we might just as well make | ||
25 | * this explicit here. Please be sure to use the decoding macros | ||
26 | * below from now on. | ||
27 | */ | ||
28 | #define _IOC_NRBITS 8 | ||
29 | #define _IOC_TYPEBITS 8 | ||
30 | #define _IOC_SIZEBITS 14 | ||
31 | #define _IOC_DIRBITS 2 | ||
32 | |||
33 | #define _IOC_NRMASK ((1 << _IOC_NRBITS)-1) | ||
34 | #define _IOC_TYPEMASK ((1 << _IOC_TYPEBITS)-1) | ||
35 | #define _IOC_SIZEMASK ((1 << _IOC_SIZEBITS)-1) | ||
36 | #define _IOC_DIRMASK ((1 << _IOC_DIRBITS)-1) | ||
37 | |||
38 | #define _IOC_NRSHIFT 0 | ||
39 | #define _IOC_TYPESHIFT (_IOC_NRSHIFT+_IOC_NRBITS) | ||
40 | #define _IOC_SIZESHIFT (_IOC_TYPESHIFT+_IOC_TYPEBITS) | ||
41 | #define _IOC_DIRSHIFT (_IOC_SIZESHIFT+_IOC_SIZEBITS) | ||
42 | |||
43 | /* | ||
44 | * Direction bits. | ||
45 | */ | ||
46 | #define _IOC_NONE 0U | ||
47 | #define _IOC_WRITE 1U | ||
48 | #define _IOC_READ 2U | ||
49 | |||
50 | #define _IOC(dir,type,nr,size) \ | ||
51 | (((dir) << _IOC_DIRSHIFT) | \ | ||
52 | ((type) << _IOC_TYPESHIFT) | \ | ||
53 | ((nr) << _IOC_NRSHIFT) | \ | ||
54 | ((size) << _IOC_SIZESHIFT)) | ||
55 | |||
56 | /* provoke compile error for invalid uses of size argument */ | ||
57 | extern int __invalid_size_argument_for_IOC; | ||
58 | #define _IOC_TYPECHECK(t) \ | ||
59 | ((sizeof(t) == sizeof(t[1]) && \ | ||
60 | sizeof(t) < (1 << _IOC_SIZEBITS)) ? \ | ||
61 | sizeof(t) : __invalid_size_argument_for_IOC) | ||
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),(_IOC_TYPECHECK(size))) | ||
66 | #define _IOW(type,nr,size) _IOC(_IOC_WRITE,(type),(nr),(_IOC_TYPECHECK(size))) | ||
67 | #define _IOWR(type,nr,size) _IOC(_IOC_READ|_IOC_WRITE,(type),(nr),(_IOC_TYPECHECK(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 /* _ASMCRIS_IOCTL_H */ | ||