1 /* $NetBSD: uvm_init.c,v 1.6 1998/03/09 00:58:57 mrg 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/mount.h> 52 #include <sys/proc.h> 53 #include <sys/malloc.h> 54 #include <sys/vnode.h> 55 #include <sys/conf.h> 56 57 58 #include <vm/vm.h> 59 #include <vm/vm_page.h> 60 #include <vm/vm_kern.h> 61 62 #include <sys/syscallargs.h> 63 64 #include <uvm/uvm.h> 65 66 /* 67 * struct uvm: we store all global vars in this structure to make them 68 * easier to spot... 69 */ 70 71 struct uvm uvm; /* decl */ 72 struct uvmexp uvmexp; /* decl */ 73 74 /* 75 * local prototypes 76 */ 77 78 /* 79 * uvm_init: init the VM system. called from kern/init_main.c. 80 */ 81 82 void 83 uvm_init() 84 { 85 vm_offset_t kvm_start, kvm_end; 86 87 /* 88 * step 0: ensure that the hardware set the page size 89 */ 90 91 if (uvmexp.pagesize == 0) { 92 panic("uvm_init: page size not set"); 93 } 94 95 /* 96 * step 1: zero the uvm structure 97 */ 98 99 bzero(&uvm, sizeof(uvm)); 100 averunnable.fscale = FSCALE; 101 102 /* 103 * step 2: init the page sub-system. this includes allocating the 104 * vm_page structures, and setting up all the page queues (and 105 * locks). available memory will be put in the "free" queue. 106 * kvm_start and kvm_end will be set to the area of kernel virtual 107 * memory which is available for general use. 108 */ 109 110 uvm_page_init(&kvm_start, &kvm_end); 111 112 /* 113 * step 3: init the map sub-system. allocates the static pool of 114 * vm_map_entry structures that are used for "special" kernel maps 115 * (e.g. kernel_map, kmem_map, etc...). 116 */ 117 118 uvm_map_init(); 119 120 /* 121 * step 4: setup the kernel's virtual memory data structures. this 122 * includes setting up the kernel_map/kernel_object and the kmem_map/ 123 * kmem_object. 124 */ 125 126 uvm_km_init(kvm_start, kvm_end); 127 128 /* 129 * step 5: init the pmap module. the pmap module is free to allocate 130 * memory for its private use (e.g. pvlists). 131 */ 132 133 pmap_init(); 134 135 /* 136 * step 6: init the kernel memory allocator. after this call the 137 * kernel memory allocator (malloc) can be used. 138 */ 139 140 kmeminit(); 141 142 /* 143 * step 7: init all pagers and the pager_map. 144 */ 145 146 uvm_pager_init(); 147 148 /* 149 * step 8: allocate anons (can add more as we add swap... later) 150 */ 151 152 uvm_anon_init(); 153 154 /* 155 * the VM system is now up! now that malloc is up we can resize the 156 * <obj,off> => <page> hash table for general use and enable paging 157 * of kernel objects. 158 */ 159 160 uvm_page_rehash(); 161 uao_create(VM_MAX_KERNEL_ADDRESS - VM_MIN_KERNEL_ADDRESS, 162 UAO_FLAG_KERNSWAP); 163 164 /* 165 * done! 166 */ 167 168 return; 169 } 170