1 /* $NetBSD: uvm_init.c,v 1.41 2011/04/24 03:56:50 rmind 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 1.41 2011/04/24 03:56:50 rmind 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 int *uvmexp_pagesize = &uvmexp.pagesize; 62 int *uvmexp_pagemask = &uvmexp.pagemask; 63 int *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 * step 0: ensure that the hardware set the page size 82 */ 83 84 if (uvmexp.pagesize == 0) { 85 panic("uvm_init: page size not set"); 86 } 87 88 /* 89 * step 1: zero the uvm structure 90 */ 91 92 memset(&uvm, 0, sizeof(uvm)); 93 averunnable.fscale = FSCALE; 94 uvm_amap_init(); 95 96 /* 97 * step 2: init the page sub-system. this includes allocating the 98 * vm_page structures, and setting up all the page queues (and 99 * locks). available memory will be put in the "free" queue. 100 * kvm_start and kvm_end will be set to the area of kernel virtual 101 * memory which is available for general use. 102 */ 103 104 uvm_page_init(&kvm_start, &kvm_end); 105 106 /* 107 * step 3: init the map sub-system. allocates the static pool of 108 * vm_map_entry structures that are used for "special" kernel maps 109 * (e.g. kernel_map, kmem_map, etc...). 110 */ 111 112 uvm_map_init(); 113 114 /* 115 * step 4: setup the kernel's virtual memory data structures. this 116 * includes setting up the kernel_map/kernel_object. 117 */ 118 119 uvm_km_init(kvm_start, kvm_end); 120 121 /* 122 * step 5: init the pmap module. the pmap module is free to allocate 123 * memory for its private use (e.g. pvlists). 124 */ 125 126 pmap_init(); 127 128 /* 129 * step 6: init the kernel memory allocator. after this call the 130 * kernel memory allocator (malloc) can be used. this includes 131 * setting up the kmem_map. 132 */ 133 134 kmeminit(); 135 136 #ifdef DEBUG 137 debug_init(); 138 #endif 139 140 /* 141 * step 7: init all pagers and the pager_map. 142 */ 143 144 uvm_pager_init(); 145 146 /* 147 * Initialize pools. This must be done before anyone manipulates 148 * any vm_maps because we use a pool for some map entry structures. 149 */ 150 151 pool_subsystem_init(); 152 153 /* 154 * init slab memory allocator kmem(9). 155 */ 156 157 kmem_init(); 158 159 /* 160 * Initialize the uvm_loan() facility. 161 */ 162 163 uvm_loan_init(); 164 165 /* 166 * init emap subsystem. 167 */ 168 169 uvm_emap_sysinit(); 170 171 /* 172 * the VM system is now up! now that kmem is up we can resize the 173 * <obj,off> => <page> hash table for general use and enable paging 174 * of kernel objects. 175 */ 176 177 uao_create(VM_MAX_KERNEL_ADDRESS - VM_MIN_KERNEL_ADDRESS, 178 UAO_FLAG_KERNSWAP); 179 180 uvmpdpol_reinit(); 181 182 /* 183 * init anonymous memory systems 184 */ 185 186 uvm_anon_init(); 187 188 uvm_uarea_init(); 189 190 /* 191 * init readahead module 192 */ 193 194 uvm_ra_init(); 195 } 196