FreeBSD/Linux Kernel Cross Reference
sys/dev/mm.c
1 /* $NetBSD: mm.c,v 1.13 2008/10/08 16:11:23 oster Exp $ */
2
3 /*-
4 * Copyright (c) 2002 The NetBSD Foundation, Inc.
5 * All rights reserved.
6 *
7 * This code is derived from software contributed to The NetBSD Foundation
8 * by Christos Zoulas.
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 *
19 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
20 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
21 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
22 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
23 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
24 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
25 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
26 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
27 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
28 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
29 * POSSIBILITY OF SUCH DAMAGE.
30 */
31
32
33 #include <sys/cdefs.h>
34 __KERNEL_RCSID(0, "$NetBSD: mm.c,v 1.13 2008/10/08 16:11:23 oster Exp $");
35
36 /*
37 * Memory special file
38 */
39
40 #include <sys/param.h>
41 #include <sys/conf.h>
42 #include <sys/buf.h>
43 #include <sys/systm.h>
44 #include <sys/uio.h>
45 #include <sys/malloc.h>
46 #include <sys/ioctl.h>
47 #include <sys/proc.h>
48 #include <sys/termios.h>
49
50 dev_type_ioctl(mmioctl);
51
52 int
53 mmioctl(dev_t dev, u_long cmd, void *data, int flag,
54 struct lwp *l)
55 {
56 switch (minor(dev)) {
57 default:
58 switch (cmd) {
59 case FIONBIO: /* We never block anyway */
60 return 0;
61 case FIOSETOWN:
62 case FIOGETOWN:
63 case TIOCGPGRP:
64 case TIOCSPGRP:
65 case TIOCGETA:
66 return ENOTTY;
67 case FIOASYNC:
68 if ((*(int *)data) == 0)
69 return 0;
70 /*FALLTHROUGH*/
71 }
72 return EOPNOTSUPP;
73 }
74 }
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