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 | |
56 | struct uvm uvm; /* decl */ |
57 | struct uvmexp uvmexp; /* decl */ |
58 | struct uvm_object *uvm_kernel_object; |
59 | |
60 | #if defined(__uvmexp_pagesize) |
61 | const int * const uvmexp_pagesize = &uvmexp.pagesize; |
62 | const int * const uvmexp_pagemask = &uvmexp.pagemask; |
63 | const int * const uvmexp_pageshift = &uvmexp.pageshift; |
64 | #endif |
65 | |
66 | kmutex_t uvm_pageqlock; |
67 | kmutex_t uvm_fpageqlock; |
68 | kmutex_t uvm_kentry_lock; |
69 | kmutex_t uvm_swap_data_lock; |
70 | |
71 | /* |
72 | * uvm_init: init the VM system. called from kern/init_main.c. |
73 | */ |
74 | |
75 | void |
76 | uvm_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 | |