1 /* $NetBSD: uvm_init.c,v 1.9 1998/08/13 02:11:00 eeh Exp $ */ 2 3 /* 4 * XXXCDC: "ROUGH DRAFT" QUALITY UVM PRE-RELEASE FILE! 5 * >>>USE AT YOUR OWN RISK, WORK IS NOT FINISHED<<< 6 */ 7 /* 8 * 9 * Copyright (c) 1997 Charles D. Cranor and Washington University. 10 * All rights reserved. 11 * 12 * Redistribution and use in source and binary forms, with or without 13 * modification, are permitted provided that the following conditions 14 * are met: 15 * 1. Redistributions of source code must retain the above copyright 16 * notice, this list of conditions and the following disclaimer. 17 * 2. Redistributions in binary form must reproduce the above copyright 18 * notice, this list of conditions and the following disclaimer in the 19 * documentation and/or other materials provided with the distribution. 20 * 3. All advertising materials mentioning features or use of this software 21 * must display the following acknowledgement: 22 * This product includes software developed by Charles D. Cranor and 23 * Washington University. 24 * 4. The name of the author may not be used to endorse or promote products 25 * derived from this software without specific prior written permission. 26 * 27 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 28 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 29 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 30 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 31 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 32 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 33 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 34 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 35 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 36 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 37 * 38 * from: Id: uvm_init.c,v 1.1.2.3 1998/02/06 05:15:27 chs Exp 39 */ 40 41 /* 42 * uvm_init.c: init the vm system. 43 */ 44 45 #include <sys/param.h> 46 #include <sys/systm.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 #include <sys/conf.h> 55 56 57 #include <vm/vm.h> 58 #include <vm/vm_page.h> 59 #include <vm/vm_kern.h> 60 61 #include <uvm/uvm.h> 62 63 /* 64 * struct uvm: we store all global vars in this structure to make them 65 * easier to spot... 66 */ 67 68 struct uvm uvm; /* decl */ 69 struct uvmexp uvmexp; /* decl */ 70 71 /* 72 * local prototypes 73 */ 74 75 /* 76 * uvm_init: init the VM system. called from kern/init_main.c. 77 */ 78 79 void 80 uvm_init() 81 { 82 vaddr_t kvm_start, kvm_end; 83 84 /* 85 * step 0: ensure that the hardware set the page size 86 */ 87 88 if (uvmexp.pagesize == 0) { 89 panic("uvm_init: page size not set"); 90 } 91 92 /* 93 * step 1: zero the uvm structure 94 */ 95 96 memset(&uvm, 0, sizeof(uvm)); 97 averunnable.fscale = FSCALE; 98 99 /* 100 * step 2: init the page sub-system. this includes allocating the 101 * vm_page structures, and setting up all the page queues (and 102 * locks). available memory will be put in the "free" queue. 103 * kvm_start and kvm_end will be set to the area of kernel virtual 104 * memory which is available for general use. 105 */ 106 107 uvm_page_init(&kvm_start, &kvm_end); 108 109 /* 110 * step 3: init the map sub-system. allocates the static pool of 111 * vm_map_entry structures that are used for "special" kernel maps 112 * (e.g. kernel_map, kmem_map, etc...). 113 */ 114 115 uvm_map_init(); 116 117 /* 118 * step 4: setup the kernel's virtual memory data structures. this 119 * includes setting up the kernel_map/kernel_object and the kmem_map/ 120 * kmem_object. 121 */ 122 123 uvm_km_init(kvm_start, kvm_end); 124 125 /* 126 * step 5: init the pmap module. the pmap module is free to allocate 127 * memory for its private use (e.g. pvlists). 128 */ 129 130 pmap_init(); 131 132 /* 133 * step 6: init the kernel memory allocator. after this call the 134 * kernel memory allocator (malloc) can be used. 135 */ 136 137 kmeminit(); 138 139 /* 140 * step 7: init all pagers and the pager_map. 141 */ 142 143 uvm_pager_init(); 144 145 /* 146 * step 8: allocate anons (can add more as we add swap... later) 147 */ 148 149 uvm_anon_init(); 150 151 /* 152 * the VM system is now up! now that malloc is up we can resize the 153 * <obj,off> => <page> hash table for general use and enable paging 154 * of kernel objects. 155 */ 156 157 uvm_page_rehash(); 158 uao_create(VM_MAX_KERNEL_ADDRESS - VM_MIN_KERNEL_ADDRESS, 159 UAO_FLAG_KERNSWAP); 160 161 /* 162 * done! 163 */ 164 165 return; 166 } 167