FreeBSD/Linux Kernel Cross Reference
sys/dev/io/iodev.c
1 /*-
2 * Copyright (c) 2004 Mark R V Murray
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer
10 * in this position and unchanged.
11 * 2. Redistributions in binary form must reproduce the above copyright
12 * notice, this list of conditions and the following disclaimer in the
13 * documentation and/or other materials provided with the distribution.
14 *
15 * THIS SOFTWARE IS PROVIDED BY THE AUTHORS ``AS IS'' AND ANY EXPRESS OR
16 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
17 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
18 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
19 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
20 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
21 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
22 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
23 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
24 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
25 *
26 */
27
28 #include <sys/cdefs.h>
29 __FBSDID("$FreeBSD$");
30
31 #include <sys/param.h>
32 #include <sys/conf.h>
33 #include <sys/fcntl.h>
34 #include <sys/kernel.h>
35 #include <sys/lock.h>
36 #include <sys/malloc.h>
37 #include <sys/module.h>
38 #include <sys/mutex.h>
39 #include <sys/proc.h>
40 #include <sys/signalvar.h>
41 #include <sys/systm.h>
42 #include <sys/uio.h>
43
44 #include <machine/specialreg.h>
45
46 #include <vm/vm.h>
47 #include <vm/pmap.h>
48
49 #include <machine/iodev.h>
50
51 static struct cdev *iodev;
52
53 static struct cdevsw io_cdevsw = {
54 .d_version = D_VERSION,
55 .d_flags = D_NEEDGIANT,
56 .d_open = ioopen,
57 .d_close = ioclose,
58 .d_name = "io",
59 };
60
61 /* ARGSUSED */
62 static int
63 io_modevent(module_t mod __unused, int type, void *data __unused)
64 {
65 switch(type) {
66 case MOD_LOAD:
67 if (bootverbose)
68 printf("io: <I/O>\n");
69 iodev = make_dev(&io_cdevsw, CDEV_MINOR_IO,
70 UID_ROOT, GID_WHEEL, 0600, "io");
71 break;
72
73 case MOD_UNLOAD:
74 destroy_dev(iodev);
75 break;
76
77 case MOD_SHUTDOWN:
78 break;
79
80 default:
81 return(EOPNOTSUPP);
82 break;
83
84 }
85
86 return (0);
87 }
88
89 DEV_MODULE(io, io_modevent, NULL);
90 MODULE_VERSION(io, 1);
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