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1 | /* $NetBSD: ioccom.h,v 1.8 2005/12/11 12:25:20 christos Exp $ */\r |
| 2 | \r |
| 3 | /*-\r |
| 4 | * Copyright (c) 1982, 1986, 1990, 1993, 1994\r |
| 5 | * The Regents of the University of California. All rights reserved.\r |
| 6 | *\r |
| 7 | * Redistribution and use in source and binary forms, with or without\r |
| 8 | * modification, are permitted provided that the following conditions\r |
| 9 | * are met:\r |
| 10 | * 1. Redistributions of source code must retain the above copyright\r |
| 11 | * notice, this list of conditions and the following disclaimer.\r |
| 12 | * 2. Redistributions in binary form must reproduce the above copyright\r |
| 13 | * notice, this list of conditions and the following disclaimer in the\r |
| 14 | * documentation and/or other materials provided with the distribution.\r |
| 15 | * 3. Neither the name of the University nor the names of its contributors\r |
| 16 | * may be used to endorse or promote products derived from this software\r |
| 17 | * without specific prior written permission.\r |
| 18 | *\r |
| 19 | * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND\r |
| 20 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE\r |
| 21 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE\r |
| 22 | * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE\r |
| 23 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL\r |
| 24 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS\r |
| 25 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)\r |
| 26 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT\r |
| 27 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY\r |
| 28 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF\r |
| 29 | * SUCH DAMAGE.\r |
| 30 | *\r |
| 31 | * @(#)ioccom.h 8.3 (Berkeley) 1/9/95\r |
| 32 | */\r |
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33 | #ifndef _SYS_IOCCOM_H_\r |
| 34 | #define _SYS_IOCCOM_H_\r |
| 35 | \r |
| 36 | /*\r |
| 37 | * Ioctl's have the command encoded in the lower word, and the size of\r |
| 38 | * any in or out parameters in the upper word. The high 3 bits of the\r |
| 39 | * upper word are used to encode the in/out status of the parameter.\r |
| 40 | */\r |
| 41 | #define IOCPARM_MASK 0x1fff /* parameter length, at most 13 bits */\r |
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42 | \r |
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43 | #define IOCPARM_LEN(x) (((x) >> 16) & IOCPARM_MASK)\r |
| 44 | #define IOCBASECMD(x) ((x) & ~(IOCPARM_MASK << 16))\r |
| 45 | #define IOCGROUP(x) (((x) >> 8) & 0xff)\r |
| 46 | \r |
| 47 | #define IOCPARM_MAX NBPG /* max size of ioctl args, mult. of NBPG */\r |
| 48 | /* no parameters */\r |
| 49 | #define IOC_VOID (unsigned long)0x20000000\r |
| 50 | /* copy parameters out */\r |
| 51 | #define IOC_OUT (unsigned long)0x40000000\r |
| 52 | /* copy parameters in */\r |
| 53 | #define IOC_IN (unsigned long)0x80000000\r |
| 54 | /* copy parameters in and out */\r |
| 55 | #define IOC_INOUT (IOC_IN|IOC_OUT)\r |
| 56 | /* mask for IN/OUT/VOID */\r |
| 57 | #define IOC_DIRMASK (unsigned long)0xe0000000\r |
| 58 | \r |
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59 | #define _IOC(inout,group,num,len) (inout | ((len & IOCPARM_MASK) << 16) | ((group) << 8) | (num))\r |
| 60 | \r |
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61 | #define _IO(g,n) _IOC(IOC_VOID, (g), (n), 0)\r |
| 62 | #define _IOR(g,n,t) _IOC(IOC_OUT, (g), (n), sizeof(t))\r |
| 63 | #define _IOW(g,n,t) _IOC(IOC_IN, (g), (n), sizeof(t))\r |
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64 | \r |
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65 | /* this should be _IORW, but stdio got there first */\r |
| 66 | #define _IOWR(g,n,t) _IOC(IOC_INOUT, (g), (n), sizeof(t))\r |
| 67 | \r |
| 68 | #endif /* !_SYS_IOCCOM_H_ */\r |
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