1 /* $NetBSD: k_uvm.c,v 1.1 2012/02/17 22:36:50 jmmv Exp $ */
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: k_uvm.c,v 1.1 2012/02/17 22:36:50 jmmv Exp $");
31
32 #include <sys/param.h>
33 #include <sys/kernel.h>
34 #include <sys/module.h>
35 #include <sys/sysctl.h>
36
37 MODULE(MODULE_CLASS_MISC, k_uvm, NULL);
38
39 /* --------------------------------------------------------------------- */
40 /* Sysctl interface to query information about the module. */
41 /* --------------------------------------------------------------------- */
42
43 static struct sysctllog *clogp;
44 static int page_size;
45
46 #define K_UVM 0x12345678
47 #define K_UVM_VALUE 0
48
49 SYSCTL_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
70 static
71 int
k_uvm_init(prop_dictionary_t props)72 k_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
82 static
83 int
k_uvm_fini(void * arg)84 k_uvm_fini(void *arg)
85 {
86
87 sysctl_teardown(&clogp);
88
89 return 0;
90 }
91
92 static
93 int
k_uvm_modcmd(modcmd_t cmd,void * arg)94 k_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