xref: /netbsd-src/sys/uvm/uvm_init.c (revision 8b0f9554ff8762542c4defc4f70e1eb76fb508fa)
1 /*	$NetBSD: uvm_init.c,v 1.30 2007/11/14 11:04:08 yamt Exp $	*/
2 
3 /*
4  *
5  * Copyright (c) 1997 Charles D. Cranor and Washington University.
6  * All rights reserved.
7  *
8  * Redistribution and use in source and binary forms, with or without
9  * modification, are permitted provided that the following conditions
10  * are met:
11  * 1. Redistributions of source code must retain the above copyright
12  *    notice, this list of conditions and the following disclaimer.
13  * 2. Redistributions in binary form must reproduce the above copyright
14  *    notice, this list of conditions and the following disclaimer in the
15  *    documentation and/or other materials provided with the distribution.
16  * 3. All advertising materials mentioning features or use of this software
17  *    must display the following acknowledgement:
18  *      This product includes software developed by Charles D. Cranor and
19  *      Washington University.
20  * 4. The name of the author may not be used to endorse or promote products
21  *    derived from this software without specific prior written permission.
22  *
23  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
24  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
25  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
26  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
27  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
28  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
29  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
30  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
31  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
32  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
33  *
34  * from: Id: uvm_init.c,v 1.1.2.3 1998/02/06 05:15:27 chs Exp
35  */
36 
37 /*
38  * uvm_init.c: init the vm system.
39  */
40 
41 #include <sys/cdefs.h>
42 __KERNEL_RCSID(0, "$NetBSD: uvm_init.c,v 1.30 2007/11/14 11:04:08 yamt Exp $");
43 
44 #include <sys/param.h>
45 #include <sys/systm.h>
46 #include <sys/debug.h>
47 #include <sys/file.h>
48 #include <sys/filedesc.h>
49 #include <sys/resourcevar.h>
50 #include <sys/mman.h>
51 #include <sys/proc.h>
52 #include <sys/malloc.h>
53 #include <sys/vnode.h>
54 
55 #include <uvm/uvm.h>
56 #include <uvm/uvm_pdpolicy.h>
57 
58 /*
59  * struct uvm: we store most global vars in this structure to make them
60  * easier to spot...
61  */
62 
63 struct uvm uvm;		/* decl */
64 struct uvmexp uvmexp;	/* decl */
65 struct uvm_object *uvm_kernel_object;
66 
67 kmutex_t uvm_fpageqlock;
68 kmutex_t uvm_pagedaemon_lock;
69 kmutex_t uvm_kentry_lock;
70 kmutex_t uvm_swap_data_lock;
71 kmutex_t uvm_scheduler_mutex;
72 
73 /*
74  * uvm_init: init the VM system.   called from kern/init_main.c.
75  */
76 
77 void
78 uvm_init(void)
79 {
80 	vaddr_t kvm_start, kvm_end;
81 
82 	/*
83 	 * step 0: ensure that the hardware set the page size
84 	 */
85 
86 	if (uvmexp.pagesize == 0) {
87 		panic("uvm_init: page size not set");
88 	}
89 
90 	/*
91 	 * step 1: zero the uvm structure
92 	 */
93 
94 	memset(&uvm, 0, sizeof(uvm));
95 	averunnable.fscale = FSCALE;
96 	uvm_amap_init();
97 
98 	/*
99 	 * step 2: init the page sub-system.  this includes allocating the
100 	 * vm_page structures, and setting up all the page queues (and
101 	 * locks).  available memory will be put in the "free" queue.
102 	 * kvm_start and kvm_end will be set to the area of kernel virtual
103 	 * memory which is available for general use.
104 	 */
105 
106 	uvm_page_init(&kvm_start, &kvm_end);
107 
108 	/*
109 	 * step 3: init the map sub-system.  allocates the static pool of
110 	 * vm_map_entry structures that are used for "special" kernel maps
111 	 * (e.g. kernel_map, kmem_map, etc...).
112 	 */
113 
114 	uvm_map_init();
115 
116 	/*
117 	 * step 4: setup the kernel's virtual memory data structures.  this
118 	 * includes setting up the kernel_map/kernel_object.
119 	 */
120 
121 	uvm_km_init(kvm_start, kvm_end);
122 
123 	/*
124 	 * step 5: 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 	 * step 6: init the kernel memory allocator.   after this call the
132 	 * kernel memory allocator (malloc) can be used. this includes
133 	 * setting up the kmem_map.
134 	 */
135 
136 	kmeminit();
137 
138 #ifdef DEBUG
139 	debug_init();
140 #endif
141 
142 	/*
143 	 * step 7: init all pagers and the pager_map.
144 	 */
145 
146 	uvm_pager_init();
147 
148 	/*
149 	 * step 8: init the uvm_loan() facility.
150 	 */
151 
152 	uvm_loan_init();
153 
154 	/*
155 	 * the VM system is now up!  now that malloc is up we can resize the
156 	 * <obj,off> => <page> hash table for general use and enable paging
157 	 * of kernel objects.
158 	 */
159 
160 	uvm_page_rehash();
161 	uao_create(VM_MAX_KERNEL_ADDRESS - VM_MIN_KERNEL_ADDRESS,
162 	    UAO_FLAG_KERNSWAP);
163 
164 	uvmpdpol_reinit();
165 
166 	/*
167 	 * Initialize pools.  This must be done before anyone manipulates
168 	 * any vm_maps because we use a pool for some map entry structures.
169 	 */
170 
171 	pool_subsystem_init();
172 
173 	/*
174 	 * init anonymous memory systems
175 	 */
176 
177 	uvm_anon_init();
178 }
179