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-rw-r--r--include/asm-powerpc/ioctl.h58
1 files changed, 1 insertions, 57 deletions
diff --git a/include/asm-powerpc/ioctl.h b/include/asm-powerpc/ioctl.h
index 8eb99848c402..57d68304218b 100644
--- a/include/asm-powerpc/ioctl.h
+++ b/include/asm-powerpc/ioctl.h
@@ -1,69 +1,13 @@
1#ifndef _ASM_POWERPC_IOCTL_H 1#ifndef _ASM_POWERPC_IOCTL_H
2#define _ASM_POWERPC_IOCTL_H 2#define _ASM_POWERPC_IOCTL_H
3 3
4
5/*
6 * this was copied from the alpha as it's a bit cleaner there.
7 * -- Cort
8 */
9
10#define _IOC_NRBITS 8
11#define _IOC_TYPEBITS 8
12#define _IOC_SIZEBITS 13 4#define _IOC_SIZEBITS 13
13#define _IOC_DIRBITS 3 5#define _IOC_DIRBITS 3
14 6
15#define _IOC_NRMASK ((1 << _IOC_NRBITS)-1)
16#define _IOC_TYPEMASK ((1 << _IOC_TYPEBITS)-1)
17#define _IOC_SIZEMASK ((1 << _IOC_SIZEBITS)-1)
18#define _IOC_DIRMASK ((1 << _IOC_DIRBITS)-1)
19
20#define _IOC_NRSHIFT 0
21#define _IOC_TYPESHIFT (_IOC_NRSHIFT+_IOC_NRBITS)
22#define _IOC_SIZESHIFT (_IOC_TYPESHIFT+_IOC_TYPEBITS)
23#define _IOC_DIRSHIFT (_IOC_SIZESHIFT+_IOC_SIZEBITS)
24
25/*
26 * Direction bits _IOC_NONE could be 0, but OSF/1 gives it a bit.
27 * And this turns out useful to catch old ioctl numbers in header
28 * files for us.
29 */
30#define _IOC_NONE 1U 7#define _IOC_NONE 1U
31#define _IOC_READ 2U 8#define _IOC_READ 2U
32#define _IOC_WRITE 4U 9#define _IOC_WRITE 4U
33 10
34#define _IOC(dir,type,nr,size) \ 11#include <asm-generic/ioctl.h>
35 (((dir) << _IOC_DIRSHIFT) | \
36 ((type) << _IOC_TYPESHIFT) | \
37 ((nr) << _IOC_NRSHIFT) | \
38 ((size) << _IOC_SIZESHIFT))
39
40/* provoke compile error for invalid uses of size argument */
41extern unsigned int __invalid_size_argument_for_IOC;
42#define _IOC_TYPECHECK(t) \
43 ((sizeof(t) == sizeof(t[1]) && \
44 sizeof(t) < (1 << _IOC_SIZEBITS)) ? \
45 sizeof(t) : __invalid_size_argument_for_IOC)
46
47/* used to create numbers */
48#define _IO(type,nr) _IOC(_IOC_NONE,(type),(nr),0)
49#define _IOR(type,nr,size) _IOC(_IOC_READ,(type),(nr),(_IOC_TYPECHECK(size)))
50#define _IOW(type,nr,size) _IOC(_IOC_WRITE,(type),(nr),(_IOC_TYPECHECK(size)))
51#define _IOWR(type,nr,size) _IOC(_IOC_READ|_IOC_WRITE,(type),(nr),(_IOC_TYPECHECK(size)))
52#define _IOR_BAD(type,nr,size) _IOC(_IOC_READ,(type),(nr),sizeof(size))
53#define _IOW_BAD(type,nr,size) _IOC(_IOC_WRITE,(type),(nr),sizeof(size))
54#define _IOWR_BAD(type,nr,size) _IOC(_IOC_READ|_IOC_WRITE,(type),(nr),sizeof(size))
55
56/* used to decode them.. */
57#define _IOC_DIR(nr) (((nr) >> _IOC_DIRSHIFT) & _IOC_DIRMASK)
58#define _IOC_TYPE(nr) (((nr) >> _IOC_TYPESHIFT) & _IOC_TYPEMASK)
59#define _IOC_NR(nr) (((nr) >> _IOC_NRSHIFT) & _IOC_NRMASK)
60#define _IOC_SIZE(nr) (((nr) >> _IOC_SIZESHIFT) & _IOC_SIZEMASK)
61
62/* various drivers, such as the pcmcia stuff, need these... */
63#define IOC_IN (_IOC_WRITE << _IOC_DIRSHIFT)
64#define IOC_OUT (_IOC_READ << _IOC_DIRSHIFT)
65#define IOC_INOUT ((_IOC_WRITE|_IOC_READ) << _IOC_DIRSHIFT)
66#define IOCSIZE_MASK (_IOC_SIZEMASK << _IOC_SIZESHIFT)
67#define IOCSIZE_SHIFT (_IOC_SIZESHIFT)
68 12
69#endif /* _ASM_POWERPC_IOCTL_H */ 13#endif /* _ASM_POWERPC_IOCTL_H */