kern_physio.c revision 1542 
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
47physio(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
62u_int
63minphys(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 */
76rawread(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 */
87rawwrite(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