1 /* $NetBSD: uvm_init.c,v 1.45 2013/01/29 21:37:04 para Exp $ */ 2 3 /* 4 * Copyright (c) 1997 Charles D. Cranor and Washington University. 5 * All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 17 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 18 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 19 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 20 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 21 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 22 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 23 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 24 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 25 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 26 * 27 * from: Id: uvm_init.c,v 1.1.2.3 1998/02/06 05:15:27 chs Exp 28 */ 29 30 /* 31 * uvm_init.c: init the vm system. 32 */ 33 34 #include <sys/cdefs.h> 35 __KERNEL_RCSID(0, "$NetBSD: uvm_init.c,v 1.45 2013/01/29 21:37:04 para Exp $"); 36 37 #include <sys/param.h> 38 #include <sys/systm.h> 39 #include <sys/debug.h> 40 #include <sys/file.h> 41 #include <sys/filedesc.h> 42 #include <sys/resourcevar.h> 43 #include <sys/kmem.h> 44 #include <sys/mman.h> 45 #include <sys/vnode.h> 46 47 #include <uvm/uvm.h> 48 #include <uvm/uvm_pdpolicy.h> 49 #include <uvm/uvm_readahead.h> 50 51 /* 52 * struct uvm: we store most global vars in this structure to make them 53 * easier to spot... 54 */ 55 56 struct uvm uvm; /* decl */ 57 struct uvmexp uvmexp; /* decl */ 58 struct uvm_object *uvm_kernel_object; 59 60 #if defined(__uvmexp_pagesize) 61 const int * const uvmexp_pagesize = &uvmexp.pagesize; 62 const int * const uvmexp_pagemask = &uvmexp.pagemask; 63 const int * const uvmexp_pageshift = &uvmexp.pageshift; 64 #endif 65 66 kmutex_t uvm_pageqlock; 67 kmutex_t uvm_fpageqlock; 68 kmutex_t uvm_kentry_lock; 69 kmutex_t uvm_swap_data_lock; 70 71 /* 72 * uvm_init: init the VM system. called from kern/init_main.c. 73 */ 74 75 void 76 uvm_init(void) 77 { 78 vaddr_t kvm_start, kvm_end; 79 80 /* 81 * Ensure that the hardware set the page size, zero the UVM structure. 82 */ 83 84 if (uvmexp.pagesize == 0) { 85 panic("uvm_init: page size not set"); 86 } 87 88 memset(&uvm, 0, sizeof(uvm)); 89 averunnable.fscale = FSCALE; 90 91 /* 92 * Init the page sub-system. This includes allocating the vm_page 93 * structures, and setting up all the page queues (and locks). 94 * Available memory will be put in the "free" queue, kvm_start and 95 * kvm_end will be set to the area of kernel virtual memory which 96 * is available for general use. 97 */ 98 99 uvm_page_init(&kvm_start, &kvm_end); 100 101 /* 102 * Init the map sub-system. 103 */ 104 105 uvm_map_init(); 106 107 /* 108 * Setup the kernel's virtual memory data structures. This includes 109 * setting up the kernel_map/kernel_object. 110 * Bootstrap all kernel memory allocators. 111 */ 112 113 uao_init(); 114 uvm_km_bootstrap(kvm_start, kvm_end); 115 116 /* 117 * Setup uvm_map caches and init the amap. 118 */ 119 120 uvm_map_init_caches(); 121 uvm_amap_init(); 122 123 /* 124 * Init the pmap module. The pmap module is free to allocate 125 * memory for its private use (e.g. pvlists). 126 */ 127 128 pmap_init(); 129 130 /* 131 * Make kernel memory allocators ready for use. 132 * After this call the pool/kmem memory allocators can be used. 133 */ 134 135 uvm_km_init(); 136 137 #ifdef DEBUG 138 debug_init(); 139 #endif 140 141 /* 142 * Init all pagers and the pager_map. 143 */ 144 145 uvm_pager_init(); 146 147 /* 148 * Initialize the uvm_loan() facility. 149 */ 150 151 uvm_loan_init(); 152 153 /* 154 * Init emap subsystem. 155 */ 156 157 uvm_emap_sysinit(); 158 159 /* 160 * The VM system is now up! Now that kmem is up we can resize the 161 * <obj,off> => <page> hash table for general use and enable paging 162 * of kernel objects. 163 */ 164 165 uao_create(VM_MAX_KERNEL_ADDRESS - VM_MIN_KERNEL_ADDRESS, 166 UAO_FLAG_KERNSWAP); 167 168 uvmpdpol_reinit(); 169 170 /* 171 * Init anonymous memory systems. 172 */ 173 174 uvm_anon_init(); 175 176 uvm_uarea_init(); 177 178 /* 179 * Init readahead mechanism. 180 */ 181 182 uvm_ra_init(); 183 } 184