Home | History | Annotate | Line # | Download | only in kern
kern_physio.c revision 1.1.1.1 
      1 /*-
      2  * Copyright (c) 1982, 1986, 1990, 1993
      3  *	The Regents of the University of California.  All rights reserved.
      4  * (c) UNIX System Laboratories, Inc.
      5  * All or some portions of this file are derived from material licensed
      6  * to the University of California by American Telephone and Telegraph
      7  * Co. or Unix System Laboratories, Inc. and are reproduced herein with
      8  * the permission of UNIX System Laboratories, Inc.
      9  *
     10  * Redistribution and use in source and binary forms, with or without
     11  * modification, are permitted provided that the following conditions
     12  * are met:
     13  * 1. Redistributions of source code must retain the above copyright
     14  *    notice, this list of conditions and the following disclaimer.
     15  * 2. Redistributions in binary form must reproduce the above copyright
     16  *    notice, this list of conditions and the following disclaimer in the
     17  *    documentation and/or other materials provided with the distribution.
     18  * 3. All advertising materials mentioning features or use of this software
     19  *    must display the following acknowledgement:
     20  *	This product includes software developed by the University of
     21  *	California, Berkeley and its contributors.
     22  * 4. Neither the name of the University nor the names of its contributors
     23  *    may be used to endorse or promote products derived from this software
     24  *    without specific prior written permission.
     25  *
     26  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
     27  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     28  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
     29  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
     30  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
     31  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
     32  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     33  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
     34  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     35  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     36  * SUCH DAMAGE.
     37  *
     38  *	from: @(#)kern_physio.c	8.1 (Berkeley) 6/10/93
     39  */
     40 
     41 #include <sys/param.h>
     42 #include <sys/systm.h>
     43 #include <sys/buf.h>
     44 #include <sys/conf.h>
     45 #include <sys/proc.h>
     46 
     47 physio(a1, a2, a3, a4, a5, a6)
     48 	int (*a1)();
     49 	struct buf *a2;
     50 	dev_t a3;
     51 	int a4;
     52 	u_int (*a5)();
     53 	struct uio *a6;
     54 {
     55 
     56 	/*
     57 	 * Body deleted.
     58 	 */
     59 	return (EIO);
     60 }
     61 
     62 u_int
     63 minphys(a1)
     64 	struct buf *a1;
     65 {
     66 
     67 	/*
     68 	 * Body deleted.
     69 	 */
     70 	return (0);
     71 }
     72 
     73 /*
     74  * Do a read on a device for a user process.
     75  */
     76 rawread(dev, uio)
     77 	dev_t dev;
     78 	struct uio *uio;
     79 {
     80 	return (physio(cdevsw[major(dev)].d_strategy, (struct buf *)NULL,
     81 	    dev, B_READ, minphys, uio));
     82 }
     83 
     84 /*
     85  * Do a write on a device for a user process.
     86  */
     87 rawwrite(dev, uio)
     88 	dev_t dev;
     89 	struct uio *uio;
     90 {
     91 	return (physio(cdevsw[major(dev)].d_strategy, (struct buf *)NULL,
     92 	    dev, B_WRITE, minphys, uio));
     93 }
     94