1 /* $NetBSD: uvm_init.c,v 1.49 2018/05/19 11:39:37 jdolecek 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 1.49 2018/05/19 11:39:37 jdolecek 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_physseg.h> 50 #include <uvm/uvm_readahead.h> 51 52 /* 53 * struct uvm: we store most global vars in this structure to make them 54 * easier to spot... 55 */ 56 57 struct uvm uvm; /* decl */ 58 struct uvmexp uvmexp; /* decl */ 59 struct uvm_object *uvm_kernel_object; 60 61 #if defined(__uvmexp_pagesize) 62 const int * const uvmexp_pagesize = &uvmexp.pagesize; 63 const int * const uvmexp_pagemask = &uvmexp.pagemask; 64 const int * const uvmexp_pageshift = &uvmexp.pageshift; 65 #endif 66 67 kmutex_t uvm_pageqlock; 68 kmutex_t uvm_fpageqlock; 69 kmutex_t uvm_kentry_lock; 70 kmutex_t uvm_swap_data_lock; 71 72 /* 73 * uvm_md_init: Init dependant on the MD boot context. 74 * called from MD code. 75 */ 76 77 void 78 uvm_md_init(void) 79 { 80 uvm_setpagesize(); /* initialize PAGE_SIZE-dependent variables */ 81 uvm_physseg_init(); 82 } 83 84 /* 85 * uvm_init: init the VM system. called from kern/init_main.c. 86 */ 87 88 void 89 uvm_init(void) 90 { 91 vaddr_t kvm_start, kvm_end; 92 93 /* 94 * Ensure that the hardware set the page size, zero the UVM structure. 95 */ 96 97 if (uvmexp.pagesize == 0) { 98 panic("uvm_init: page size not set"); 99 } 100 101 memset(&uvm, 0, sizeof(uvm)); 102 averunnable.fscale = FSCALE; 103 104 /* 105 * Init the page sub-system. This includes allocating the vm_page 106 * structures, and setting up all the page queues (and locks). 107 * Available memory will be put in the "free" queue, kvm_start and 108 * kvm_end will be set to the area of kernel virtual memory which 109 * is available for general use. 110 */ 111 112 uvm_page_init(&kvm_start, &kvm_end); 113 114 /* 115 * Init the map sub-system. 116 */ 117 118 uvm_map_init(); 119 120 /* 121 * Setup the kernel's virtual memory data structures. This includes 122 * setting up the kernel_map/kernel_object. 123 * Bootstrap all kernel memory allocators. 124 */ 125 126 uao_init(); 127 uvm_km_bootstrap(kvm_start, kvm_end); 128 129 /* 130 * Setup uvm_map caches and init the amap. 131 */ 132 133 uvm_map_init_caches(); 134 uvm_amap_init(); 135 136 /* 137 * Init the pmap module. The pmap module is free to allocate 138 * memory for its private use (e.g. pvlists). 139 */ 140 141 pmap_init(); 142 143 /* 144 * Make kernel memory allocators ready for use. 145 * After this call the pool/kmem memory allocators can be used. 146 */ 147 148 uvm_km_init(); 149 #ifdef __HAVE_PMAP_PV_TRACK 150 pmap_pv_init(); 151 #endif 152 153 #ifdef DEBUG 154 debug_init(); 155 #endif 156 157 /* 158 * Init all pagers and the pager_map. 159 */ 160 161 uvm_pager_init(); 162 163 /* 164 * Initialize the uvm_loan() facility. 165 */ 166 167 uvm_loan_init(); 168 169 /* 170 * The VM system is now up! Now that kmem is up we can resize the 171 * <obj,off> => <page> hash table for general use and enable paging 172 * of kernel objects. 173 */ 174 175 uao_create(VM_MAX_KERNEL_ADDRESS - VM_MIN_KERNEL_ADDRESS, 176 UAO_FLAG_KERNSWAP); 177 178 uvmpdpol_reinit(); 179 180 /* 181 * Init anonymous memory systems. 182 */ 183 184 uvm_anon_init(); 185 186 uvm_uarea_init(); 187 188 /* 189 * Init readahead mechanism. 190 */ 191 192 uvm_ra_init(); 193 } 194