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author | Ralf Baechle <ralf@linux-mips.org> | 2008-09-16 17:48:51 (GMT) |
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committer | Ralf Baechle <ralf@linux-mips.org> | 2008-10-11 15:18:52 (GMT) |
commit | 384740dc49ea651ba350704d13ff6be9976e37fe (patch) | |
tree | a6e80cad287ccae7a86d81bfa692fc96889c88ed /arch/mips/include/asm/ioctl.h | |
parent | e8c7c482347574ecdd45c43e32c332d5fc2ece61 (diff) | |
download | linux-fsl-qoriq-384740dc49ea651ba350704d13ff6be9976e37fe.tar.xz |
MIPS: Move headfiles to new location below arch/mips/include
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
Diffstat (limited to 'arch/mips/include/asm/ioctl.h')
-rw-r--r-- | arch/mips/include/asm/ioctl.h | 94 |
1 files changed, 94 insertions, 0 deletions
diff --git a/arch/mips/include/asm/ioctl.h b/arch/mips/include/asm/ioctl.h new file mode 100644 index 0000000..85067e2 --- /dev/null +++ b/arch/mips/include/asm/ioctl.h @@ -0,0 +1,94 @@ +/* + * This file is subject to the terms and conditions of the GNU General Public + * License. See the file "COPYING" in the main directory of this archive + * for more details. + * + * Copyright (C) 1995, 96, 99, 2001 Ralf Baechle + */ +#ifndef _ASM_IOCTL_H +#define _ASM_IOCTL_H + +/* + * The original linux ioctl numbering scheme was just a general + * "anything goes" setup, where more or less random numbers were + * assigned. Sorry, I was clueless when I started out on this. + * + * On the alpha, we'll try to clean it up a bit, using a more sane + * ioctl numbering, and also trying to be compatible with OSF/1 in + * the process. I'd like to clean it up for the i386 as well, but + * it's so painful recognizing both the new and the old numbers.. + * + * The same applies for for the MIPS ABI; in fact even the macros + * from Linux/Alpha fit almost perfectly. + */ + +#define _IOC_NRBITS 8 +#define _IOC_TYPEBITS 8 +#define _IOC_SIZEBITS 13 +#define _IOC_DIRBITS 3 + +#define _IOC_NRMASK ((1 << _IOC_NRBITS)-1) +#define _IOC_TYPEMASK ((1 << _IOC_TYPEBITS)-1) +#define _IOC_SIZEMASK ((1 << _IOC_SIZEBITS)-1) +#define _IOC_DIRMASK ((1 << _IOC_DIRBITS)-1) + +#define _IOC_NRSHIFT 0 +#define _IOC_TYPESHIFT (_IOC_NRSHIFT+_IOC_NRBITS) +#define _IOC_SIZESHIFT (_IOC_TYPESHIFT+_IOC_TYPEBITS) +#define _IOC_DIRSHIFT (_IOC_SIZESHIFT+_IOC_SIZEBITS) + +/* + * Direction bits _IOC_NONE could be 0, but OSF/1 gives it a bit. + * And this turns out useful to catch old ioctl numbers in header + * files for us. + */ +#define _IOC_NONE 1U +#define _IOC_READ 2U +#define _IOC_WRITE 4U + +/* + * The following are included for compatibility + */ +#define _IOC_VOID 0x20000000 +#define _IOC_OUT 0x40000000 +#define _IOC_IN 0x80000000 +#define _IOC_INOUT (IOC_IN|IOC_OUT) + +#define _IOC(dir, type, nr, size) \ + (((dir) << _IOC_DIRSHIFT) | \ + ((type) << _IOC_TYPESHIFT) | \ + ((nr) << _IOC_NRSHIFT) | \ + ((size) << _IOC_SIZESHIFT)) + +/* provoke compile error for invalid uses of size argument */ +extern unsigned int __invalid_size_argument_for_IOC; +#define _IOC_TYPECHECK(t) \ + ((sizeof(t) == sizeof(t[1]) && \ + sizeof(t) < (1 << _IOC_SIZEBITS)) ? \ + sizeof(t) : __invalid_size_argument_for_IOC) + +/* used to create numbers */ +#define _IO(type, nr) _IOC(_IOC_NONE, (type), (nr), 0) +#define _IOR(type, nr, size) _IOC(_IOC_READ, (type), (nr), (_IOC_TYPECHECK(size))) +#define _IOW(type, nr, size) _IOC(_IOC_WRITE, (type), (nr), (_IOC_TYPECHECK(size))) +#define _IOWR(type, nr, size) _IOC(_IOC_READ|_IOC_WRITE, (type), (nr), (_IOC_TYPECHECK(size))) +#define _IOR_BAD(type, nr, size) _IOC(_IOC_READ, (type), (nr), sizeof(size)) +#define _IOW_BAD(type, nr, size) _IOC(_IOC_WRITE, (type), (nr), sizeof(size)) +#define _IOWR_BAD(type, nr, size) _IOC(_IOC_READ|_IOC_WRITE, (type), (nr), sizeof(size)) + + +/* used to decode them.. */ +#define _IOC_DIR(nr) (((nr) >> _IOC_DIRSHIFT) & _IOC_DIRMASK) +#define _IOC_TYPE(nr) (((nr) >> _IOC_TYPESHIFT) & _IOC_TYPEMASK) +#define _IOC_NR(nr) (((nr) >> _IOC_NRSHIFT) & _IOC_NRMASK) +#define _IOC_SIZE(nr) (((nr) >> _IOC_SIZESHIFT) & _IOC_SIZEMASK) + +/* ...and for the drivers/sound files... */ + +#define IOC_IN (_IOC_WRITE << _IOC_DIRSHIFT) +#define IOC_OUT (_IOC_READ << _IOC_DIRSHIFT) +#define IOC_INOUT ((_IOC_WRITE|_IOC_READ) << _IOC_DIRSHIFT) +#define IOCSIZE_MASK (_IOC_SIZEMASK << _IOC_SIZESHIFT) +#define IOCSIZE_SHIFT (_IOC_SIZESHIFT) + +#endif /* _ASM_IOCTL_H */ |