1 /* $OpenBSD: uvm_init.c,v 1.20 2009/03/20 15:19:04 oga Exp $ */ 2 /* $NetBSD: uvm_init.c,v 1.14 2000/06/27 17:29:23 mrg Exp $ */ 3 4 /* 5 * 6 * Copyright (c) 1997 Charles D. Cranor and Washington University. 7 * All rights reserved. 8 * 9 * Redistribution and use in source and binary forms, with or without 10 * modification, are permitted provided that the following conditions 11 * are met: 12 * 1. Redistributions of source code must retain the above copyright 13 * notice, this list of conditions and the following disclaimer. 14 * 2. Redistributions in binary form must reproduce the above copyright 15 * notice, this list of conditions and the following disclaimer in the 16 * documentation and/or other materials provided with the distribution. 17 * 3. All advertising materials mentioning features or use of this software 18 * must display the following acknowledgement: 19 * This product includes software developed by Charles D. Cranor and 20 * Washington University. 21 * 4. The name of the author may not be used to endorse or promote products 22 * derived from this software without specific prior written permission. 23 * 24 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 25 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 26 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 27 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 28 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 29 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 30 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 31 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 32 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 33 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 34 * 35 * from: Id: uvm_init.c,v 1.1.2.3 1998/02/06 05:15:27 chs Exp 36 */ 37 38 /* 39 * uvm_init.c: init the vm system. 40 */ 41 42 #include <sys/param.h> 43 #include <sys/systm.h> 44 #include <sys/file.h> 45 #include <sys/filedesc.h> 46 #include <sys/resourcevar.h> 47 #include <sys/mman.h> 48 #include <sys/proc.h> 49 #include <sys/malloc.h> 50 #include <sys/vnode.h> 51 52 #include <uvm/uvm.h> 53 54 /* 55 * struct uvm: we store all global vars in this structure to make them 56 * easier to spot... 57 */ 58 59 struct uvm uvm; /* decl */ 60 struct uvmexp uvmexp; /* decl */ 61 62 /* 63 * local prototypes 64 */ 65 66 /* 67 * uvm_init: init the VM system. called from kern/init_main.c. 68 */ 69 70 void 71 uvm_init(void) 72 { 73 vaddr_t kvm_start, kvm_end; 74 75 /* 76 * step 0: ensure that the hardware set the page size 77 */ 78 79 if (uvmexp.pagesize == 0) { 80 panic("uvm_init: page size not set"); 81 } 82 83 /* 84 * step 1: zero the uvm structure 85 */ 86 87 memset(&uvm, 0, sizeof(uvm)); 88 averunnable.fscale = FSCALE; 89 90 /* 91 * step 2: init the page sub-system. this includes allocating the 92 * vm_page structures, and setting up all the page queues (and 93 * locks). available memory will be put in the "free" queue. 94 * kvm_start and kvm_end will be set to the area of kernel virtual 95 * memory which is available for general use. 96 */ 97 98 uvm_page_init(&kvm_start, &kvm_end); 99 100 /* 101 * step 3: init the map sub-system. allocates the static pool of 102 * vm_map_entry structures that are used for "special" kernel maps 103 * (e.g. kernel_map, kmem_map, etc...). 104 */ 105 106 uvm_map_init(); 107 108 /* 109 * step 4: setup the kernel's virtual memory data structures. this 110 * includes setting up the kernel_map/kernel_object and the kmem_map/ 111 * kmem_object. 112 */ 113 114 uvm_km_init(kvm_start, kvm_end); 115 116 /* 117 * step 5: init the pmap module. the pmap module is free to allocate 118 * memory for its private use (e.g. pvlists). 119 */ 120 121 pmap_init(); 122 123 /* 124 * step 6: init the kernel memory allocator. after this call the 125 * kernel memory allocator (malloc) can be used. 126 */ 127 128 kmeminit(); 129 130 /* 131 * step 7: init all pagers and the pager_map. 132 */ 133 134 uvm_pager_init(); 135 136 /* 137 * step 8: init anonymous memory system 138 */ 139 140 amap_init(); /* init amap module */ 141 142 /* 143 * step 9: init uvm_km_page allocator memory. 144 */ 145 uvm_km_page_init(); 146 147 /* 148 * the VM system is now up! now that malloc is up we can resize the 149 * <obj,off> => <page> hash table for general use and enable paging 150 * of kernel objects. 151 */ 152 153 uvm_page_rehash(); 154 uao_create(VM_MAX_KERNEL_ADDRESS - VM_MIN_KERNEL_ADDRESS, 155 UAO_FLAG_KERNSWAP); 156 157 /* 158 * reserve some unmapped space for malloc/pool use after free usage 159 */ 160 #ifdef DEADBEEF0 161 kvm_start = trunc_page(DEADBEEF0) - PAGE_SIZE; 162 if (uvm_map(kernel_map, &kvm_start, 3 * PAGE_SIZE, 163 NULL, UVM_UNKNOWN_OFFSET, 0, UVM_MAPFLAG(UVM_PROT_NONE, 164 UVM_PROT_NONE, UVM_INH_NONE, UVM_ADV_RANDOM, UVM_FLAG_FIXED))) 165 panic("uvm_init: cannot reserve dead beef @0x%x\n", DEADBEEF0); 166 #endif 167 #ifdef DEADBEEF1 168 kvm_start = trunc_page(DEADBEEF1) - PAGE_SIZE; 169 if (uvm_map(kernel_map, &kvm_start, 3 * PAGE_SIZE, 170 NULL, UVM_UNKNOWN_OFFSET, 0, UVM_MAPFLAG(UVM_PROT_NONE, 171 UVM_PROT_NONE, UVM_INH_NONE, UVM_ADV_RANDOM, UVM_FLAG_FIXED))) 172 panic("uvm_init: cannot reserve dead beef @0x%x\n", DEADBEEF1); 173 #endif 174 /* 175 * init anonymous memory systems 176 */ 177 uvm_anon_init(); 178 } 179