1/* $NetBSD: uvm_init.c,v 1.46 2015/04/03 01:03:42 riastradh Exp $ */
2
3/*
4 * Copyright (c) 1997 Charles D. Cranor and Washington University.
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 AUTHOR ``AS IS'' AND ANY EXPRESS OR
17 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
18 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
19 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
20 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
21 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
22 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
23 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
24 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
25 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
26 *
27 * from: Id: uvm_init.c,v 1.1.2.3 1998/02/06 05:15:27 chs Exp
28 */
29
30/*
31 * uvm_init.c: init the vm system.
32 */
33
34#include <sys/cdefs.h>
35__KERNEL_RCSID(0, "$NetBSD: uvm_init.c,v 1.46 2015/04/03 01:03:42 riastradh Exp $");
36
37#include <sys/param.h>
38#include <sys/systm.h>
39#include <sys/debug.h>
40#include <sys/file.h>
41#include <sys/filedesc.h>
42#include <sys/resourcevar.h>
43#include <sys/kmem.h>
44#include <sys/mman.h>
45#include <sys/vnode.h>
46
47#include <uvm/uvm.h>
48#include <uvm/uvm_pdpolicy.h>
49#include <uvm/uvm_readahead.h>
50
51/*
52 * struct uvm: we store most global vars in this structure to make them
53 * easier to spot...
54 */
55
56struct uvm uvm; /* decl */
57struct uvmexp uvmexp; /* decl */
58struct uvm_object *uvm_kernel_object;
59
60#if defined(__uvmexp_pagesize)
61const int * const uvmexp_pagesize = &uvmexp.pagesize;
62const int * const uvmexp_pagemask = &uvmexp.pagemask;
63const int * const uvmexp_pageshift = &uvmexp.pageshift;
64#endif
65
66kmutex_t uvm_pageqlock;
67kmutex_t uvm_fpageqlock;
68kmutex_t uvm_kentry_lock;
69kmutex_t uvm_swap_data_lock;
70
71/*
72 * uvm_init: init the VM system. called from kern/init_main.c.
73 */
74
75void
76uvm_init(void)
77{
78 vaddr_t kvm_start, kvm_end;
79
80 /*
81 * Ensure that the hardware set the page size, zero the UVM structure.
82 */
83
84 if (uvmexp.pagesize == 0) {
85 panic("uvm_init: page size not set");
86 }
87
88 memset(&uvm, 0, sizeof(uvm));
89 averunnable.fscale = FSCALE;
90
91 /*
92 * Init the page sub-system. This includes allocating the vm_page
93 * structures, and setting up all the page queues (and locks).
94 * Available memory will be put in the "free" queue, kvm_start and
95 * kvm_end will be set to the area of kernel virtual memory which
96 * is available for general use.
97 */
98
99 uvm_page_init(&kvm_start, &kvm_end);
100
101 /*
102 * Init the map sub-system.
103 */
104
105 uvm_map_init();
106
107 /*
108 * Setup the kernel's virtual memory data structures. This includes
109 * setting up the kernel_map/kernel_object.
110 * Bootstrap all kernel memory allocators.
111 */
112
113 uao_init();
114 uvm_km_bootstrap(kvm_start, kvm_end);
115
116 /*
117 * Setup uvm_map caches and init the amap.
118 */
119
120 uvm_map_init_caches();
121 uvm_amap_init();
122
123 /*
124 * Init the pmap module. The pmap module is free to allocate
125 * memory for its private use (e.g. pvlists).
126 */
127
128 pmap_init();
129
130 /*
131 * Make kernel memory allocators ready for use.
132 * After this call the pool/kmem memory allocators can be used.
133 */
134
135 uvm_km_init();
136#ifdef __HAVE_PMAP_PV_TRACK
137 pmap_pv_init();
138#endif
139
140#ifdef DEBUG
141 debug_init();
142#endif
143
144 /*
145 * Init all pagers and the pager_map.
146 */
147
148 uvm_pager_init();
149
150 /*
151 * Initialize the uvm_loan() facility.
152 */
153
154 uvm_loan_init();
155
156 /*
157 * Init emap subsystem.
158 */
159
160 uvm_emap_sysinit();
161
162 /*
163 * The VM system is now up! Now that kmem is up we can resize the
164 * <obj,off> => <page> hash table for general use and enable paging
165 * of kernel objects.
166 */
167
168 uao_create(VM_MAX_KERNEL_ADDRESS - VM_MIN_KERNEL_ADDRESS,
169 UAO_FLAG_KERNSWAP);
170
171 uvmpdpol_reinit();
172
173 /*
174 * Init anonymous memory systems.
175 */
176
177 uvm_anon_init();
178
179 uvm_uarea_init();
180
181 /*
182 * Init readahead mechanism.
183 */
184
185 uvm_ra_init();
186}
187