1/*
2 * Copyright (c) 2000 Apple Computer, Inc. All rights reserved.
3 *
4 * @APPLE_OSREFERENCE_LICENSE_HEADER_START@
5 *
6 * This file contains Original Code and/or Modifications of Original Code
7 * as defined in and that are subject to the Apple Public Source License
8 * Version 2.0 (the 'License'). You may not use this file except in
9 * compliance with the License. The rights granted to you under the License
10 * may not be used to create, or enable the creation or redistribution of,
11 * unlawful or unlicensed copies of an Apple operating system, or to
12 * circumvent, violate, or enable the circumvention or violation of, any
13 * terms of an Apple operating system software license agreement.
14 *
15 * Please obtain a copy of the License at
16 * http://www.opensource.apple.com/apsl/ and read it before using this file.
17 *
18 * The Original Code and all software distributed under the License are
19 * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
20 * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
21 * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
22 * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
23 * Please see the License for the specific language governing rights and
24 * limitations under the License.
25 *
26 * @APPLE_OSREFERENCE_LICENSE_HEADER_END@
27 */
28/* Copyright (c) 1995 NeXT Computer, Inc. All Rights Reserved */
29/*-
30 * Copyright (c) 1982, 1986, 1990, 1993, 1994
31 *	The Regents of the University of California.  All rights reserved.
32 *
33 * Redistribution and use in source and binary forms, with or without
34 * modification, are permitted provided that the following conditions
35 * are met:
36 * 1. Redistributions of source code must retain the above copyright
37 *    notice, this list of conditions and the following disclaimer.
38 * 2. Redistributions in binary form must reproduce the above copyright
39 *    notice, this list of conditions and the following disclaimer in the
40 *    documentation and/or other materials provided with the distribution.
41 * 3. All advertising materials mentioning features or use of this software
42 *    must display the following acknowledgement:
43 *	This product includes software developed by the University of
44 *	California, Berkeley and its contributors.
45 * 4. Neither the name of the University nor the names of its contributors
46 *    may be used to endorse or promote products derived from this software
47 *    without specific prior written permission.
48 *
49 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
50 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
51 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
52 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
53 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
54 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
55 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
56 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
57 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
58 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
59 * SUCH DAMAGE.
60 *
61 *	@(#)ioccom.h	8.2 (Berkeley) 3/28/94
62 */
63
64#ifndef	_SYS_IOCCOM_H_
65#define	_SYS_IOCCOM_H_
66
67#include <sys/_types.h>
68
69/*
70 * Ioctl's have the command encoded in the lower word, and the size of
71 * any in or out parameters in the upper word.  The high 3 bits of the
72 * upper word are used to encode the in/out status of the parameter.
73 */
74#define	IOCPARM_MASK	0x1fff		/* parameter length, at most 13 bits */
75#define	IOCPARM_LEN(x)	(((x) >> 16) & IOCPARM_MASK)
76#define	IOCBASECMD(x)	((x) & ~(IOCPARM_MASK << 16))
77#define	IOCGROUP(x)	(((x) >> 8) & 0xff)
78
79#define	IOCPARM_MAX	(IOCPARM_MASK + 1)	/* max size of ioctl args */
80				/* no parameters */
81#define	IOC_VOID	(__uint32_t)0x20000000
82				/* copy parameters out */
83#define	IOC_OUT		(__uint32_t)0x40000000
84				/* copy parameters in */
85#define	IOC_IN		(__uint32_t)0x80000000
86				/* copy paramters in and out */
87#define	IOC_INOUT	(IOC_IN|IOC_OUT)
88				/* mask for IN/OUT/VOID */
89#define	IOC_DIRMASK	(__uint32_t)0xe0000000
90
91#define	_IOC(inout,group,num,len) \
92	(inout | ((len & IOCPARM_MASK) << 16) | ((group) << 8) | (num))
93#define	_IO(g,n)	_IOC(IOC_VOID,	(g), (n), 0)
94#define	_IOR(g,n,t)	_IOC(IOC_OUT,	(g), (n), sizeof(t))
95#define	_IOW(g,n,t)	_IOC(IOC_IN,	(g), (n), sizeof(t))
96/* this should be _IORW, but stdio got there first */
97#define	_IOWR(g,n,t)	_IOC(IOC_INOUT,	(g), (n), sizeof(t))
98
99#endif /* !_SYS_IOCCOM_H_ */
100