76 lines
3.3 KiB
C
76 lines
3.3 KiB
C
|
/* $NetBSD: ioccom.h,v 1.11 2011/10/19 10:53:12 yamt Exp $ */
|
||
|
|
|
||
|
|
/*-
|
||
|
|
* Copyright (c) 1982, 1986, 1990, 1993, 1994
|
||
|
|
* The Regents of the University of California. All rights reserved.
|
||
|
|
*
|
||
|
|
* Redistribution and use in source and binary forms, with or without
|
||
|
|
* modification, are permitted provided that the following conditions
|
||
|
|
* are met:
|
||
|
|
* 1. Redistributions of source code must retain the above copyright
|
||
|
|
* notice, this list of conditions and the following disclaimer.
|
||
|
|
* 2. Redistributions in binary form must reproduce the above copyright
|
||
|
|
* notice, this list of conditions and the following disclaimer in the
|
||
|
|
* documentation and/or other materials provided with the distribution.
|
||
|
|
* 3. Neither the name of the University nor the names of its contributors
|
||
|
|
* may be used to endorse or promote products derived from this software
|
||
|
|
* without specific prior written permission.
|
||
|
|
*
|
||
|
|
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
|
||
|
|
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
||
|
|
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
|
||
|
|
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
|
||
|
|
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
|
||
|
|
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
|
||
|
|
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
|
||
|
|
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
|
||
|
|
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
|
||
|
|
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
|
||
|
|
* SUCH DAMAGE.
|
||
|
|
*
|
||
|
|
* @(#)ioccom.h 8.3 (Berkeley) 1/9/95
|
||
|
|
*/
|
||
|
|
|
||
|
|
#ifndef _SYS_IOCCOM_H_
|
||
|
|
#define _SYS_IOCCOM_H_
|
||
|
|
|
||
|
|
/*
|
||
|
|
* Ioctl's have the command encoded in the lower word, and the size of
|
||
|
|
* any in or out parameters in the upper word. The high 3 bits of the
|
||
|
|
* upper word are used to encode the in/out status of the parameter.
|
||
|
|
*
|
||
|
|
* 31 29 28 16 15 8 7 0
|
||
|
|
* +---------------------------------------------------------------+
|
||
|
|
* | I/O | Parameter Length | Command Group | Command |
|
||
|
|
* +---------------------------------------------------------------+
|
||
|
|
*/
|
||
|
|
#define IOCPARM_MASK 0x1fff /* parameter length, at most 13 bits */
|
||
|
|
#define IOCPARM_SHIFT 16
|
||
|
|
#define IOCGROUP_SHIFT 8
|
||
|
|
#define IOCPARM_LEN(x) (((x) >> IOCPARM_SHIFT) & IOCPARM_MASK)
|
||
|
|
#define IOCBASECMD(x) ((x) & ~(IOCPARM_MASK << IOCPARM_SHIFT))
|
||
|
|
#define IOCGROUP(x) (((x) >> IOCGROUP_SHIFT) & 0xff)
|
||
|
|
|
||
|
|
#define IOCPARM_MAX NBPG /* max size of ioctl args, mult. of NBPG */
|
||
|
|
/* no parameters */
|
||
|
|
#define IOC_VOID (unsigned long)0x20000000
|
||
|
|
/* copy parameters out */
|
||
|
|
#define IOC_OUT (unsigned long)0x40000000
|
||
|
|
/* copy parameters in */
|
||
|
|
#define IOC_IN (unsigned long)0x80000000
|
||
|
|
/* copy parameters in and out */
|
||
|
|
#define IOC_INOUT (IOC_IN|IOC_OUT)
|
||
|
|
/* mask for IN/OUT/VOID */
|
||
|
|
#define IOC_DIRMASK (unsigned long)0xe0000000
|
||
|
|
|
||
|
|
#define _IOC(inout, group, num, len) \
|
||
|
|
((inout) | (((len) & IOCPARM_MASK) << IOCPARM_SHIFT) | \
|
||
|
|
((group) << IOCGROUP_SHIFT) | (num))
|
||
|
|
#define _IO(g,n) _IOC(IOC_VOID, (g), (n), 0)
|
||
|
|
#define _IOR(g,n,t) _IOC(IOC_OUT, (g), (n), sizeof(t))
|
||
|
|
#define _IOW(g,n,t) _IOC(IOC_IN, (g), (n), sizeof(t))
|
||
|
|
/* this should be _IORW, but stdio got there first */
|
||
|
|
#define _IOWR(g,n,t) _IOC(IOC_INOUT, (g), (n), sizeof(t))
|
||
|
|
|
||
|
|
#endif /* !_SYS_IOCCOM_H_ */
|