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1 /*- |
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2 * Copyright (c) 1982, 1986, 1990, 1993, 1994 |
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3 * The Regents of the University of California. All rights reserved. |
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4 * |
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5 * Redistribution and use in source and binary forms, with or without |
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6 * modification, are permitted provided that the following conditions |
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7 * are met: |
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8 * 1. Redistributions of source code must retain the above copyright |
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9 * notice, this list of conditions and the following disclaimer. |
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10 * 2. Redistributions in binary form must reproduce the above copyright |
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11 * notice, this list of conditions and the following disclaimer in the |
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12 * documentation and/or other materials provided with the distribution. |
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13 * 4. Neither the name of the University nor the names of its contributors |
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14 * may be used to endorse or promote products derived from this software |
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15 * without specific prior written permission. |
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16 * |
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17 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND |
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18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
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19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
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20 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE |
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21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
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22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
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23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
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24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
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25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY |
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26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
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27 * SUCH DAMAGE. |
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28 * |
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29 * @(#)ioccom.h 8.2 (Berkeley) 3/28/94 |
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30 * $FreeBSD: src/sys/sys/ioccom.h,v 1.15 2004/04/07 04:19:49 imp Exp $ |
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31 */ |
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32 |
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33 #ifndef _SYS_IOCCOM_H_ |
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34 #define _SYS_IOCCOM_H_ |
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35 |
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36 /* |
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37 * Ioctl's have the command encoded in the lower word, and the size of |
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38 * any in or out parameters in the upper word. The high 3 bits of the |
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39 * upper word are used to encode the in/out status of the parameter. |
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40 */ |
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41 #define IOCPARM_MASK 0x1fff /* parameter length, at most 13 bits */ |
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42 #define IOCPARM_LEN(x) (((x) >> 16) & IOCPARM_MASK) |
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43 #define IOCBASECMD(x) ((x) & ~(IOCPARM_MASK << 16)) |
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44 #define IOCGROUP(x) (((x) >> 8) & 0xff) |
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45 |
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46 #define IOCPARM_MAX PAGE_SIZE /* max size of ioctl, mult. of PAGE_SIZE */ |
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47 #define IOC_VOID 0x20000000 /* no parameters */ |
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48 #define IOC_OUT 0x40000000 /* copy out parameters */ |
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49 #define IOC_IN 0x80000000 /* copy in parameters */ |
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50 #define IOC_INOUT (IOC_IN|IOC_OUT) |
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51 #define IOC_DIRMASK 0xe0000000 /* mask for IN/OUT/VOID */ |
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52 |
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53 #define _IOC(inout,group,num,len) \ |
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54 ((unsigned long)(inout | ((len & IOCPARM_MASK) << 16) | ((group) << 8) | (num))) |
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55 #define _IO(g,n) _IOC(IOC_VOID, (g), (n), 0) |
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56 #define _IOR(g,n,t) _IOC(IOC_OUT, (g), (n), sizeof(t)) |
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57 #define _IOW(g,n,t) _IOC(IOC_IN, (g), (n), sizeof(t)) |
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58 /* this should be _IORW, but stdio got there first */ |
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59 #define _IOWR(g,n,t) _IOC(IOC_INOUT, (g), (n), sizeof(t)) |
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60 |
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61 #ifndef _KERNEL |
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62 |
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63 #include <sys/cdefs.h> |
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64 |
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65 __BEGIN_DECLS |
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66 IMPORT_C int ioctl(int, unsigned long, ...); |
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67 __END_DECLS |
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68 |
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69 #endif |
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70 |
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71 #endif /* !_SYS_IOCCOM_H_ */ |