1 /* $NetBSD: uvm_init.c,v 1.15 2001/11/10 07:37:00 lukem 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 1.15 2001/11/10 07:37:00 lukem 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 56 /* 57 * struct uvm: we store all global vars in this structure to make them 58 * easier to spot... 59 */ 60 61 struct uvm uvm; /* decl */ 62 struct uvmexp uvmexp; /* decl */ 63 64 /* 65 * local prototypes 66 */ 67 68 /* 69 * uvm_init: init the VM system. called from kern/init_main.c. 70 */ 71 72 void 73 uvm_init() 74 { 75 vaddr_t kvm_start, kvm_end; 76 77 /* 78 * step 0: ensure that the hardware set the page size 79 */ 80 81 if (uvmexp.pagesize == 0) { 82 panic("uvm_init: page size not set"); 83 } 84 85 /* 86 * step 1: zero the uvm structure 87 */ 88 89 memset(&uvm, 0, sizeof(uvm)); 90 averunnable.fscale = FSCALE; 91 92 /* 93 * step 2: init the page sub-system. this includes allocating the 94 * vm_page structures, and setting up all the page queues (and 95 * locks). available memory will be put in the "free" queue. 96 * kvm_start and kvm_end will be set to the area of kernel virtual 97 * memory which is available for general use. 98 */ 99 100 uvm_page_init(&kvm_start, &kvm_end); 101 102 /* 103 * step 3: init the map sub-system. allocates the static pool of 104 * vm_map_entry structures that are used for "special" kernel maps 105 * (e.g. kernel_map, kmem_map, etc...). 106 */ 107 108 uvm_map_init(); 109 110 /* 111 * step 4: setup the kernel's virtual memory data structures. this 112 * includes setting up the kernel_map/kernel_object and the kmem_map/ 113 * kmem_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. 128 */ 129 130 kmeminit(); 131 132 /* 133 * step 7: init all pagers and the pager_map. 134 */ 135 136 uvm_pager_init(); 137 138 /* 139 * step 8: init anonymous memory systems (both amap and anons) 140 */ 141 142 amap_init(); /* init amap module */ 143 uvm_anon_init(); /* allocate initial anons */ 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 /* 156 * done! 157 */ 158 159 return; 160 } 161