1 /* $NetBSD: ioccom.h,v 1.5 1998/03/01 02:24:12 fvdl Exp $ */ 2 3 /*- 4 * Copyright (c) 1982, 1986, 1990, 1993, 1994 5 * The Regents of the University of California. All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 3. All advertising materials mentioning features or use of this software 16 * must display the following acknowledgement: 17 * This product includes software developed by the University of 18 * California, Berkeley and its contributors. 19 * 4. Neither the name of the University nor the names of its contributors 20 * may be used to endorse or promote products derived from this software 21 * without specific prior written permission. 22 * 23 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 24 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 25 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 26 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 27 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 28 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 29 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 30 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 31 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 32 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 33 * SUCH DAMAGE. 34 * 35 * @(#)ioccom.h 8.3 (Berkeley) 1/9/95 36 */ 37 38 #ifndef _SYS_IOCCOM_H_ 39 #define _SYS_IOCCOM_H_ 40 41 /* 42 * Ioctl's have the command encoded in the lower word, and the size of 43 * any in or out parameters in the upper word. The high 3 bits of the 44 * upper word are used to encode the in/out status of the parameter. 45 */ 46 #define IOCPARM_MASK 0x1fff /* parameter length, at most 13 bits */ 47 #define IOCPARM_LEN(x) (((x) >> 16) & IOCPARM_MASK) 48 #define IOCBASECMD(x) ((x) & ~(IOCPARM_MASK << 16)) 49 #define IOCGROUP(x) (((x) >> 8) & 0xff) 50 51 #define IOCPARM_MAX NBPG /* max size of ioctl args, mult. of NBPG */ 52 /* no parameters */ 53 #define IOC_VOID (unsigned long)0x20000000 54 /* copy parameters out */ 55 #define IOC_OUT (unsigned long)0x40000000 56 /* copy parameters in */ 57 #define IOC_IN (unsigned long)0x80000000 58 /* copy paramters in and out */ 59 #define IOC_INOUT (IOC_IN|IOC_OUT) 60 /* mask for IN/OUT/VOID */ 61 #define IOC_DIRMASK (unsigned long)0xe0000000 62 63 #define _IOC(inout,group,num,len) \ 64 (inout | ((len & IOCPARM_MASK) << 16) | ((group) << 8) | (num)) 65 #define _IO(g,n) _IOC(IOC_VOID, (g), (n), 0) 66 #define _IOR(g,n,t) _IOC(IOC_OUT, (g), (n), sizeof(t)) 67 #define _IOW(g,n,t) _IOC(IOC_IN, (g), (n), sizeof(t)) 68 /* this should be _IORW, but stdio got there first */ 69 #define _IOWR(g,n,t) _IOC(IOC_INOUT, (g), (n), sizeof(t)) 70 71 #endif /* !_SYS_IOCCOM_H_ */ 72