1 /* $NetBSD: uvm_init.c,v 1.26 2006/09/15 15:51:13 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 1.26 2006/09/15 15:51:13 yamt Exp $"); 43 44 #include <sys/param.h> 45 #include <sys/systm.h> 46 #include <sys/file.h> 47 #include <sys/filedesc.h> 48 #include <sys/resourcevar.h> 49 #include <sys/mman.h> 50 #include <sys/proc.h> 51 #include <sys/malloc.h> 52 #include <sys/vnode.h> 53 54 #include <uvm/uvm.h> 55 #include <uvm/uvm_pdpolicy.h> 56 57 /* 58 * struct uvm: we store all global vars in this structure to make them 59 * easier to spot... 60 */ 61 62 struct uvm uvm; /* decl */ 63 struct uvmexp uvmexp; /* decl */ 64 65 /* 66 * local prototypes 67 */ 68 69 /* 70 * uvm_init: init the VM system. called from kern/init_main.c. 71 */ 72 73 void 74 uvm_init(void) 75 { 76 vaddr_t kvm_start, kvm_end; 77 78 /* 79 * step 0: ensure that the hardware set the page size 80 */ 81 82 if (uvmexp.pagesize == 0) { 83 panic("uvm_init: page size not set"); 84 } 85 86 /* 87 * step 1: zero the uvm structure 88 */ 89 90 memset(&uvm, 0, sizeof(uvm)); 91 averunnable.fscale = FSCALE; 92 93 /* 94 * step 2: init the page sub-system. this includes allocating the 95 * vm_page structures, and setting up all the page queues (and 96 * locks). available memory will be put in the "free" queue. 97 * kvm_start and kvm_end will be set to the area of kernel virtual 98 * memory which is available for general use. 99 */ 100 101 uvm_page_init(&kvm_start, &kvm_end); 102 103 /* 104 * step 3: init the map sub-system. allocates the static pool of 105 * vm_map_entry structures that are used for "special" kernel maps 106 * (e.g. kernel_map, kmem_map, etc...). 107 */ 108 109 uvm_map_init(); 110 111 /* 112 * step 4: setup the kernel's virtual memory data structures. this 113 * includes setting up the kernel_map/kernel_object. 114 */ 115 116 uvm_km_init(kvm_start, kvm_end); 117 118 /* 119 * step 5: init the pmap module. the pmap module is free to allocate 120 * memory for its private use (e.g. pvlists). 121 */ 122 123 pmap_init(); 124 125 /* 126 * step 6: init the kernel memory allocator. after this call the 127 * kernel memory allocator (malloc) can be used. this includes 128 * setting up the kmem_map. 129 */ 130 131 kmeminit(); 132 133 /* 134 * step 7: init all pagers and the pager_map. 135 */ 136 137 uvm_pager_init(); 138 139 /* 140 * step 8: init the uvm_loan() facility. 141 */ 142 143 uvm_loan_init(); 144 145 /* 146 * the VM system is now up! now that malloc is up we can resize the 147 * <obj,off> => <page> hash table for general use and enable paging 148 * of kernel objects. 149 */ 150 151 uvm_page_rehash(); 152 uao_create(VM_MAX_KERNEL_ADDRESS - VM_MIN_KERNEL_ADDRESS, 153 UAO_FLAG_KERNSWAP); 154 155 uvmpdpol_reinit(); 156 157 /* 158 * Initialize pools. This must be done before anyone manipulates 159 * any vm_maps because we use a pool for some map entry structures. 160 */ 161 162 pool_subsystem_init(); 163 164 /* 165 * init anonymous memory systems 166 */ 167 168 uvm_anon_init(); 169 } 170