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 000000000000..85067e248a83
--- /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 */