1 /* $NetBSD: miniroot.c,v 1.3 2008/11/16 15:47:35 ad Exp $ */
2
3 /*-
4 * Copyright (c) 2008 The NetBSD Foundation, Inc.
5 * All rights reserved.
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
9 * are met:
10 * 1. Redistributions of source code must retain the above copyright
11 * notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 * notice, this list of conditions and the following disclaimer in the
14 * documentation and/or other materials provided with the distribution.
15 *
16 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
17 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
18 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
19 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
20 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
21 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
22 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
23 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
24 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
25 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
26 * POSSIBILITY OF SUCH DAMAGE.
27 */
28
29 #include <sys/cdefs.h>
30 __KERNEL_RCSID(0, "$NetBSD: miniroot.c,v 1.3 2008/11/16 15:47:35 ad Exp $");
31
32 #include <sys/param.h>
33 #include <sys/kernel.h>
34 #include <sys/module.h>
35
36 #include <dev/md.h>
37
38 MODULE(MODULE_CLASS_MISC, miniroot, NULL);
39
40 static int
miniroot_modcmd(modcmd_t cmd,void * arg)41 miniroot_modcmd(modcmd_t cmd, void *arg)
42 {
43 void *addr;
44 int error;
45 size_t size;
46
47 switch (cmd) {
48 case MODULE_CMD_INIT:
49 error = module_find_section("miniroot", &addr, &size);
50 if (error == 0) {
51 if (size == 0) {
52 error = EINVAL;
53 } else {
54 md_root_setconf(addr, size);
55 }
56 }
57 return error;
58
59 case MODULE_CMD_FINI:
60 return EOPNOTSUPP;
61
62 default:
63 return ENOTTY;
64 }
65 }
66