1 /* $OpenBSD: uvm_init.c,v 1.28 2010/08/07 03:50:02 krw 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 #include <sys/pool.h> 52 53 #include <uvm/uvm.h> 54 55 /* 56 * struct uvm: we store all global vars in this structure to make them 57 * easier to spot... 58 */ 59 60 struct uvm uvm; /* decl */ 61 struct uvmexp uvmexp; /* decl */ 62 63 /* 64 * local prototypes 65 */ 66 67 /* 68 * uvm_init: init the VM system. called from kern/init_main.c. 69 */ 70 71 void 72 uvm_init(void) 73 { 74 vaddr_t kvm_start, kvm_end; 75 76 /* 77 * step 0: ensure that the hardware set the page size 78 */ 79 80 if (uvmexp.pagesize == 0) { 81 panic("uvm_init: page size not set"); 82 } 83 84 /* 85 * step 1: set up stats. 86 */ 87 averunnable.fscale = FSCALE; 88 89 /* 90 * step 2: init the page sub-system. this includes allocating the 91 * vm_page structures, and setting up all the page queues (and 92 * locks). available memory will be put in the "free" queue. 93 * kvm_start and kvm_end will be set to the area of kernel virtual 94 * memory which is available for general use. 95 */ 96 97 uvm_page_init(&kvm_start, &kvm_end); 98 99 /* 100 * step 3: init the map sub-system. allocates the static pool of 101 * vm_map_entry structures that are used for "special" kernel maps 102 * (e.g. kernel_map, kmem_map, etc...). 103 */ 104 105 uvm_map_init(); 106 107 /* 108 * step 4: setup the kernel's virtual memory data structures. this 109 * includes setting up the kernel_map/kernel_object and the kmem_map/ 110 * kmem_object. 111 */ 112 113 uvm_km_init(kvm_start, kvm_end); 114 115 /* 116 * step 5: init the pmap module. the pmap module is free to allocate 117 * memory for its private use (e.g. pvlists). 118 */ 119 120 pmap_init(); 121 122 /* 123 * step 6: init the kernel memory allocator. after this call the 124 * kernel memory allocator (malloc) can be used. 125 */ 126 127 kmeminit(); 128 129 /* 130 * step 6.5: init the dma allocator, which is backed by pools. 131 */ 132 dma_alloc_init(); 133 134 /* 135 * step 7: init all pagers and the pager_map. 136 */ 137 138 uvm_pager_init(); 139 140 /* 141 * step 8: init anonymous memory system 142 */ 143 144 amap_init(); /* init amap module */ 145 146 /* 147 * step 9: init uvm_km_page allocator memory. 148 */ 149 uvm_km_page_init(); 150 151 /* 152 * the VM system is now up! now that malloc is up we can 153 * enable paging of kernel objects. 154 */ 155 156 uao_create(VM_MAX_KERNEL_ADDRESS - VM_MIN_KERNEL_ADDRESS, 157 UAO_FLAG_KERNSWAP); 158 159 /* 160 * reserve some unmapped space for malloc/pool use after free usage 161 */ 162 #ifdef DEADBEEF0 163 kvm_start = trunc_page(DEADBEEF0) - PAGE_SIZE; 164 if (uvm_map(kernel_map, &kvm_start, 3 * PAGE_SIZE, 165 NULL, UVM_UNKNOWN_OFFSET, 0, UVM_MAPFLAG(UVM_PROT_NONE, 166 UVM_PROT_NONE, UVM_INH_NONE, UVM_ADV_RANDOM, UVM_FLAG_FIXED))) 167 panic("uvm_init: cannot reserve dead beef @0x%x", DEADBEEF0); 168 #endif 169 #ifdef DEADBEEF1 170 kvm_start = trunc_page(DEADBEEF1) - PAGE_SIZE; 171 if (uvm_map(kernel_map, &kvm_start, 3 * PAGE_SIZE, 172 NULL, UVM_UNKNOWN_OFFSET, 0, UVM_MAPFLAG(UVM_PROT_NONE, 173 UVM_PROT_NONE, UVM_INH_NONE, UVM_ADV_RANDOM, UVM_FLAG_FIXED))) 174 panic("uvm_init: cannot reserve dead beef @0x%x", DEADBEEF1); 175 #endif 176 /* 177 * init anonymous memory systems 178 */ 179 uvm_anon_init(); 180 } 181