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, Version 1.0 only 6 * (the "License"). You may not use this file except in compliance 7 * with the License. 8 * 9 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 10 * or http://www.opensolaris.org/os/licensing. 11 * See the License for the specific language governing permissions 12 * and limitations under the License. 13 * 14 * When distributing Covered Code, include this CDDL HEADER in each 15 * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 16 * If applicable, add the following below this CDDL HEADER, with the 17 * fields enclosed by brackets "[]" replaced with your own identifying 18 * information: Portions Copyright [yyyy] [name of copyright owner] 19 * 20 * CDDL HEADER END 21 */ 22 /* 23 * Copyright 1997 Sun Microsystems, Inc. All rights reserved. 24 * Use is subject to license terms. 25 */ 26 27 /* Copyright (c) 1983, 1984, 1985, 1986, 1987, 1988, 1989 AT&T */ 28 /* All Rights Reserved */ 29 30 /* 31 * University Copyright- Copyright (c) 1982, 1986, 1988 32 * The Regents of the University of California 33 * All Rights Reserved 34 * 35 * University Acknowledgment- Portions of this document are derived from 36 * software developed by the University of California, Berkeley, and its 37 * contributors. 38 */ 39 40 #ifndef _SYS_IOCCOM_H 41 #define _SYS_IOCCOM_H 42 43 #ifdef __cplusplus 44 extern "C" { 45 #endif 46 47 /* 48 * Ioctl's have the command encoded in the lower word, 49 * and the size of any in or out parameters in the upper 50 * word. The high 2 bits of the upper word are used 51 * to encode the in/out status of the parameter; for now 52 * we restrict parameters to at most 255 bytes. 53 */ 54 #define IOCPARM_MASK 0xff /* parameters must be < 256 bytes */ 55 #define IOC_VOID 0x20000000 /* no parameters */ 56 #define IOC_OUT 0x40000000 /* copy out parameters */ 57 #define IOC_IN 0x80000000 /* copy in parameters */ 58 #define IOC_INOUT (IOC_IN|IOC_OUT) 59 60 /* 61 * The 0x20000000 is so we can distinguish new ioctl's from old. 62 */ 63 #define _IO(x, y) (IOC_VOID|(x<<8)|y) 64 #define _IOR(x, y, t) \ 65 ((int)((uint32_t) \ 66 (IOC_OUT|(((sizeof (t))&IOCPARM_MASK)<<16)|(x<<8)|y))) 67 68 #define _IORN(x, y, t) ((int)((uint32_t)(IOC_OUT|(((t)&IOCPARM_MASK)<<16)| \ 69 (x<<8)|y))) 70 71 #define _IOW(x, y, t) \ 72 ((int)((uint32_t)(IOC_IN|(((sizeof (t))&IOCPARM_MASK)<<16)| \ 73 (x<<8)|y))) 74 75 #define _IOWN(x, y, t) ((int32_t)(uint32_t)(IOC_IN|(((t)&IOCPARM_MASK)<<16)| \ 76 (x<<8)|y)) 77 78 #define _IOWR(x, y, t) \ 79 ((int)((uint32_t)(IOC_INOUT|(((sizeof (t))&IOCPARM_MASK)<<16)| \ 80 (x<<8)|y))) 81 82 #define _IOWRN(x, y, t) \ 83 ((int)((uint32_t)(IOC_INOUT|(((t)&IOCPARM_MASK)<<16)| \ 84 (x<<8)|y))) 85 86 #ifdef __cplusplus 87 } 88 #endif 89 90 #endif /* _SYS_IOCCOM_H */ 91