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Diffstat (limited to 'sys/sys/ioccom.h')
| -rw-r--r-- | sys/sys/ioccom.h | 68 |
1 files changed, 68 insertions, 0 deletions
diff --git a/sys/sys/ioccom.h b/sys/sys/ioccom.h new file mode 100644 index 0000000..936fc13 --- /dev/null +++ b/sys/sys/ioccom.h @@ -0,0 +1,68 @@ +/* $OpenBSD: ioccom.h,v 1.5 2013/03/22 21:22:05 deraadt Exp $ */ +/* $NetBSD: ioccom.h,v 1.4 1994/10/30 21:49:56 cgd Exp $ */ + +/*- + * Copyright (c) 1982, 1986, 1990, 1993, 1994 + * The Regents of the University of California. All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * 3. Neither the name of the University nor the names of its contributors + * may be used to endorse or promote products derived from this software + * without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND + * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE + * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS + * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY + * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF + * SUCH DAMAGE. + * + * @(#)ioccom.h 8.2 (Berkeley) 3/28/94 + */ + +#ifndef _SYS_IOCCOM_H_ +#define _SYS_IOCCOM_H_ + +/* + * Ioctl's have the command encoded in the lower word, and the size of + * any in or out parameters in the upper word. The high 3 bits of the + * upper word are used to encode the in/out status of the parameter. + */ +#define IOCPARM_MASK 0x1fff /* parameter length, at most 13 bits */ +#define IOCPARM_LEN(x) (((x) >> 16) & IOCPARM_MASK) +#define IOCBASECMD(x) ((x) & ~(IOCPARM_MASK << 16)) +#define IOCGROUP(x) (((x) >> 8) & 0xff) + +#define IOCPARM_MAX PAGE_SIZE /* max size of ioctl args */ + /* no parameters */ +#define IOC_VOID (unsigned long)0x20000000 + /* copy parameters out */ +#define IOC_OUT (unsigned long)0x40000000 + /* copy parameters in */ +#define IOC_IN (unsigned long)0x80000000 + /* copy parameters in and out */ +#define IOC_INOUT (IOC_IN|IOC_OUT) + /* mask for IN/OUT/VOID */ +#define IOC_DIRMASK (unsigned long)0xe0000000 + +#define _IOC(inout,group,num,len) \ + (inout | ((len & IOCPARM_MASK) << 16) | ((group) << 8) | (num)) +#define _IO(g,n) _IOC(IOC_VOID, (g), (n), 0) +#define _IOR(g,n,t) _IOC(IOC_OUT, (g), (n), sizeof(t)) +#define _IOW(g,n,t) _IOC(IOC_IN, (g), (n), sizeof(t)) +/* this should be _IORW, but stdio got there first */ +#define _IOWR(g,n,t) _IOC(IOC_INOUT, (g), (n), sizeof(t)) + +#endif /* !_SYS_IOCCOM_H_ */ |