1/****************************************************************************
2 ****************************************************************************
3 ***
4 ***   This header was automatically generated from a Linux kernel header
5 ***   of the same name, to make information necessary for userspace to
6 ***   call into the kernel available to libc.  It contains only constants,
7 ***   structures, and macros generated from the original header, and thus,
8 ***   contains no copyrightable information.
9 ***
10 ****************************************************************************
11 ****************************************************************************/
12#ifndef _ASM_GENERIC_IOCTL_H
13#define _ASM_GENERIC_IOCTL_H
14
15#define _IOC_NRBITS 8
16#define _IOC_TYPEBITS 8
17#define _IOC_SIZEBITS 14
18#define _IOC_DIRBITS 2
19
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)
24
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)
29
30#define _IOC_NONE 0U
31#define _IOC_WRITE 1U
32#define _IOC_READ 2U
33
34#define _IOC(dir,type,nr,size)   (((dir) << _IOC_DIRSHIFT) |   ((type) << _IOC_TYPESHIFT) |   ((nr) << _IOC_NRSHIFT) |   ((size) << _IOC_SIZESHIFT))
35
36extern unsigned int __invalid_size_argument_for_IOC;
37#define _IOC_TYPECHECK(t)   ((sizeof(t) == sizeof(t[1]) &&   sizeof(t) < (1 << _IOC_SIZEBITS)) ?   sizeof(t) : __invalid_size_argument_for_IOC)
38
39#define _IO(type,nr) _IOC(_IOC_NONE,(type),(nr),0)
40#define _IOR(type,nr,size) _IOC(_IOC_READ,(type),(nr),(_IOC_TYPECHECK(size)))
41#define _IOW(type,nr,size) _IOC(_IOC_WRITE,(type),(nr),(_IOC_TYPECHECK(size)))
42#define _IOWR(type,nr,size) _IOC(_IOC_READ|_IOC_WRITE,(type),(nr),(_IOC_TYPECHECK(size)))
43#define _IOR_BAD(type,nr,size) _IOC(_IOC_READ,(type),(nr),sizeof(size))
44#define _IOW_BAD(type,nr,size) _IOC(_IOC_WRITE,(type),(nr),sizeof(size))
45#define _IOWR_BAD(type,nr,size) _IOC(_IOC_READ|_IOC_WRITE,(type),(nr),sizeof(size))
46
47#define _IOC_DIR(nr) (((nr) >> _IOC_DIRSHIFT) & _IOC_DIRMASK)
48#define _IOC_TYPE(nr) (((nr) >> _IOC_TYPESHIFT) & _IOC_TYPEMASK)
49#define _IOC_NR(nr) (((nr) >> _IOC_NRSHIFT) & _IOC_NRMASK)
50#define _IOC_SIZE(nr) (((nr) >> _IOC_SIZESHIFT) & _IOC_SIZEMASK)
51
52#define IOC_IN (_IOC_WRITE << _IOC_DIRSHIFT)
53#define IOC_OUT (_IOC_READ << _IOC_DIRSHIFT)
54#define IOC_INOUT ((_IOC_WRITE|_IOC_READ) << _IOC_DIRSHIFT)
55#define IOCSIZE_MASK (_IOC_SIZEMASK << _IOC_SIZESHIFT)
56#define IOCSIZE_SHIFT (_IOC_SIZESHIFT)
57
58#endif
59