1/*	$NetBSD$	*/
2/*
3 * Copyright (c) 2012 The NetBSD Foundation, Inc.
4 * All rights reserved.
5 *
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions
8 * are met:
9 * 1. Redistributions of source code must retain the above copyright
10 *    notice, this list of conditions and the following disclaimer.
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 NETBSD FOUNDATION, INC. AND
16 * CONTRIBUTORS ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES,
17 * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
18 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
19 * IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS BE LIABLE FOR ANY
20 * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
21 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE
22 * GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
23 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER
24 * IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
25 * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN
26 * IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
27 */
28
29#include <sys/cdefs.h>
30__KERNEL_RCSID(0, "$NetBSD$");
31
32#include <sys/param.h>
33#include <sys/kernel.h>
34#include <sys/module.h>
35#include <sys/sysctl.h>
36
37MODULE(MODULE_CLASS_MISC, k_uvm, NULL);
38
39/* --------------------------------------------------------------------- */
40/* Sysctl interface to query information about the module.               */
41/* --------------------------------------------------------------------- */
42
43static struct sysctllog *clogp;
44static int page_size;
45
46#define K_UVM 0x12345678
47#define K_UVM_VALUE 0
48
49SYSCTL_SETUP(sysctl_k_uvm_setup, "sysctl k_uvm subtree setup")
50{
51
52	sysctl_createv(clog, 0, NULL, NULL,
53	               CTLFLAG_PERMANENT,
54	               CTLTYPE_NODE, "k_uvm", NULL,
55	               NULL, 0, NULL, 0,
56	               CTL_VENDOR, K_UVM, CTL_EOL);
57
58	sysctl_createv(clog, 0, NULL, NULL,
59	               CTLFLAG_PERMANENT,
60	               CTLTYPE_INT, "page_size",
61		       SYSCTL_DESCR("Value of PAGE_SIZE"),
62		       NULL, 0, &page_size, 0,
63	               CTL_VENDOR, K_UVM, K_UVM_VALUE, CTL_EOL);
64}
65
66/* --------------------------------------------------------------------- */
67/* Module management.                                                    */
68/* --------------------------------------------------------------------- */
69
70static
71int
72k_uvm_init(prop_dictionary_t props)
73{
74
75	page_size = PAGE_SIZE;
76
77	sysctl_k_uvm_setup(&clogp);
78
79	return 0;
80}
81
82static
83int
84k_uvm_fini(void *arg)
85{
86
87	sysctl_teardown(&clogp);
88
89	return 0;
90}
91
92static
93int
94k_uvm_modcmd(modcmd_t cmd, void *arg)
95{
96	int ret;
97
98	switch (cmd) {
99	case MODULE_CMD_INIT:
100		ret = k_uvm_init(arg);
101		break;
102
103	case MODULE_CMD_FINI:
104		ret = k_uvm_fini(arg);
105		break;
106
107	case MODULE_CMD_STAT:
108	default:
109		ret = ENOTTY;
110	}
111
112	return ret;
113}
114