1 /* 2 * CDDL HEADER START 3 * 4 * The contents of this file are subject to the terms of the 5 * Common Development and Distribution License (the "License"). 6 * You may not use this file except in compliance with the License. 7 * 8 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 9 * or http://www.opensolaris.org/os/licensing. 10 * See the License for the specific language governing permissions 11 * and limitations under the License. 12 * 13 * When distributing Covered Code, include this CDDL HEADER in each 14 * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 15 * If applicable, add the following below this CDDL HEADER, with the 16 * fields enclosed by brackets "[]" replaced with your own identifying 17 * information: Portions Copyright [yyyy] [name of copyright owner] 18 * 19 * CDDL HEADER END 20 */ 21 /* 22 * Copyright 2008 Sun Microsystems, Inc. All rights reserved. 23 * Use is subject to license terms. 24 */ 25 26 /* Copyright (c) 1983, 1984, 1985, 1986, 1987, 1988, 1989 AT&T */ 27 /* All Rights Reserved */ 28 29 /* 30 * University Copyright- Copyright (c) 1982, 1986, 1988 31 * The Regents of the University of California 32 * All Rights Reserved 33 * 34 * University Acknowledgment- Portions of this document are derived from 35 * software developed by the University of California, Berkeley, and its 36 * contributors. 37 */ 38 39 #ifndef _SYS_IOCCOM_H 40 #define _SYS_IOCCOM_H 41 42 #pragma ident "%Z%%M% %I% %E% SMI" 43 44 #ifdef __cplusplus 45 extern "C" { 46 #endif 47 48 /* 49 * Ioctl's have the command encoded in the lower word, 50 * and the size of any in or out parameters in the upper 51 * word. The high 2 bits of the upper word are used 52 * to encode the in/out status of the parameter; 53 * parameters are restricted to at most 8191 bytes. 54 */ 55 #define IOCPARM_MASK 0x1fff /* parameters must be < 8K bytes */ 56 #define IOC_VOID 0x20000000 /* no parameters */ 57 #define IOC_OUT 0x40000000 /* copy out parameters */ 58 #define IOC_IN 0x80000000 /* copy in parameters */ 59 #define IOC_INOUT (IOC_IN|IOC_OUT) 60 61 /* 62 * The 0x20000000 is so we can distinguish new ioctl's from old. 63 */ 64 #define _IO(x, y) (IOC_VOID|(x<<8)|y) 65 #define _IOR(x, y, t) \ 66 ((int)((uint32_t) \ 67 (IOC_OUT|(((sizeof (t))&IOCPARM_MASK)<<16)|(x<<8)|y))) 68 69 #define _IORN(x, y, t) ((int)((uint32_t)(IOC_OUT|(((t)&IOCPARM_MASK)<<16)| \ 70 (x<<8)|y))) 71 72 #define _IOW(x, y, t) \ 73 ((int)((uint32_t)(IOC_IN|(((sizeof (t))&IOCPARM_MASK)<<16)| \ 74 (x<<8)|y))) 75 76 #define _IOWN(x, y, t) ((int32_t)(uint32_t)(IOC_IN|(((t)&IOCPARM_MASK)<<16)| \ 77 (x<<8)|y)) 78 79 #define _IOWR(x, y, t) \ 80 ((int)((uint32_t)(IOC_INOUT|(((sizeof (t))&IOCPARM_MASK)<<16)| \ 81 (x<<8)|y))) 82 83 #define _IOWRN(x, y, t) \ 84 ((int)((uint32_t)(IOC_INOUT|(((t)&IOCPARM_MASK)<<16)| \ 85 (x<<8)|y))) 86 87 #ifdef __cplusplus 88 } 89 #endif 90 91 #endif /* _SYS_IOCCOM_H */ 92