[PATCH] aic7xxx_osm build fix
[cris-mirror.git] / include / asm-ppc64 / ioctl.h
blob42b8c5da7fbc13a5b1dddaecce10e654c9d8e5bb
1 #ifndef _PPC64_IOCTL_H
2 #define _PPC64_IOCTL_H
5 /*
6 * This was copied from the alpha as it's a bit cleaner there.
7 * -- Cort
9 * This program is free software; you can redistribute it and/or
10 * modify it under the terms of the GNU General Public License
11 * as published by the Free Software Foundation; either version
12 * 2 of the License, or (at your option) any later version.
15 #define _IOC_NRBITS 8
16 #define _IOC_TYPEBITS 8
17 #define _IOC_SIZEBITS 13
18 #define _IOC_DIRBITS 3
20 #define _IOC_NRMASK ((1 << _IOC_NRBITS)-1)
21 #define _IOC_TYPEMASK ((1 << _IOC_TYPEBITS)-1)
22 #define _IOC_SIZEMASK ((1 << _IOC_SIZEBITS)-1)
23 #define _IOC_DIRMASK ((1 << _IOC_DIRBITS)-1)
25 #define _IOC_NRSHIFT 0
26 #define _IOC_TYPESHIFT (_IOC_NRSHIFT+_IOC_NRBITS)
27 #define _IOC_SIZESHIFT (_IOC_TYPESHIFT+_IOC_TYPEBITS)
28 #define _IOC_DIRSHIFT (_IOC_SIZESHIFT+_IOC_SIZEBITS)
31 * Direction bits _IOC_NONE could be 0, but OSF/1 gives it a bit.
32 * And this turns out useful to catch old ioctl numbers in header
33 * files for us.
35 #define _IOC_NONE 1U
36 #define _IOC_READ 2U
37 #define _IOC_WRITE 4U
39 #define _IOC(dir,type,nr,size) \
40 (((dir) << _IOC_DIRSHIFT) | \
41 ((type) << _IOC_TYPESHIFT) | \
42 ((nr) << _IOC_NRSHIFT) | \
43 ((size) << _IOC_SIZESHIFT))
45 /* provoke compile error for invalid uses of size argument */
46 extern unsigned int __invalid_size_argument_for_IOC;
47 #define _IOC_TYPECHECK(t) \
48 ((sizeof(t) == sizeof(t[1]) && \
49 sizeof(t) < (1 << _IOC_SIZEBITS)) ? \
50 sizeof(t) : __invalid_size_argument_for_IOC)
52 /* used to create numbers */
53 #define _IO(type,nr) _IOC(_IOC_NONE,(type),(nr),0)
54 #define _IOR(type,nr,size) _IOC(_IOC_READ,(type),(nr),(_IOC_TYPECHECK(size)))
55 #define _IOW(type,nr,size) _IOC(_IOC_WRITE,(type),(nr),(_IOC_TYPECHECK(size)))
56 #define _IOWR(type,nr,size) _IOC(_IOC_READ|_IOC_WRITE,(type),(nr),(_IOC_TYPECHECK(size)))
57 #define _IOR_BAD(type,nr,size) _IOC(_IOC_READ,(type),(nr),sizeof(size))
58 #define _IOW_BAD(type,nr,size) _IOC(_IOC_WRITE,(type),(nr),sizeof(size))
59 #define _IOWR_BAD(type,nr,size) _IOC(_IOC_READ|_IOC_WRITE,(type),(nr),sizeof(size))
61 /* used to decode them.. */
62 #define _IOC_DIR(nr) (((nr) >> _IOC_DIRSHIFT) & _IOC_DIRMASK)
63 #define _IOC_TYPE(nr) (((nr) >> _IOC_TYPESHIFT) & _IOC_TYPEMASK)
64 #define _IOC_NR(nr) (((nr) >> _IOC_NRSHIFT) & _IOC_NRMASK)
65 #define _IOC_SIZE(nr) (((nr) >> _IOC_SIZESHIFT) & _IOC_SIZEMASK)
67 /* various drivers, such as the pcmcia stuff, need these... */
68 #define IOC_IN (_IOC_WRITE << _IOC_DIRSHIFT)
69 #define IOC_OUT (_IOC_READ << _IOC_DIRSHIFT)
70 #define IOC_INOUT ((_IOC_WRITE|_IOC_READ) << _IOC_DIRSHIFT)
71 #define IOCSIZE_MASK (_IOC_SIZEMASK << _IOC_SIZESHIFT)
72 #define IOCSIZE_SHIFT (_IOC_SIZESHIFT)
74 #endif /* _PPC64_IOCTL_H */