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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-ppc/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-ppc/ioctl.h')
-rw-r--r--include/asm-ppc/ioctl.h69
1 files changed, 69 insertions, 0 deletions
diff --git a/include/asm-ppc/ioctl.h b/include/asm-ppc/ioctl.h
new file mode 100644
index 000000000000..93c6acfdd0fd
--- /dev/null
+++ b/include/asm-ppc/ioctl.h
@@ -0,0 +1,69 @@
1#ifndef _PPC_IOCTL_H
2#define _PPC_IOCTL_H
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
13#define _IOC_DIRBITS 3
14
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
31#define _IOC_READ 2U
32#define _IOC_WRITE 4U
33
34#define _IOC(dir,type,nr,size) \
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
69#endif