1 /* $NetBSD: uvm_init.c,v 1.55 2020/11/04 01:30:19 chs 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 1.55 2020/11/04 01:30:19 chs 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_kentry_lock __cacheline_aligned; 68 69 /* 70 * uvm_md_init: Init dependant on the MD boot context. 71 * called from MD code. 72 */ 73 74 void 75 uvm_md_init(void) 76 { 77 uvm_setpagesize(); /* initialize PAGE_SIZE-dependent variables */ 78 uvm_physseg_init(); 79 } 80 81 /* 82 * uvm_init: init the VM system. called from kern/init_main.c. 83 */ 84 85 void 86 uvm_init(void) 87 { 88 vaddr_t kvm_start, kvm_end; 89 90 /* 91 * Ensure that the hardware set the page size, zero the UVM structure. 92 */ 93 94 if (uvmexp.pagesize == 0) { 95 panic("uvm_init: page size not set"); 96 } 97 98 memset(&uvm, 0, sizeof(uvm)); 99 averunnable.fscale = FSCALE; 100 101 /* 102 * Init the page sub-system. This includes allocating the vm_page 103 * structures, and setting up all the page queues (and locks). 104 * Available memory will be put in the "free" queue, kvm_start and 105 * kvm_end will be set to the area of kernel virtual memory which 106 * is available for general use. 107 */ 108 109 uvm_page_init(&kvm_start, &kvm_end); 110 uvm_pglistalloc_init(); 111 112 /* 113 * Init the map sub-system. 114 */ 115 116 uvm_map_init(); 117 118 /* 119 * Setup the kernel's virtual memory data structures. This includes 120 * setting up the kernel_map/kernel_object. 121 * Bootstrap all kernel memory allocators. 122 */ 123 124 uao_init(); 125 uvm_km_bootstrap(kvm_start, kvm_end); 126 127 /* 128 * Setup uvm_map caches and init the amap. 129 */ 130 131 uvm_map_init_caches(); 132 uvm_amap_init(); 133 134 /* 135 * Init the pmap module. The pmap module is free to allocate 136 * memory for its private use (e.g. pvlists). 137 */ 138 139 pmap_init(); 140 141 /* 142 * Make kernel memory allocators ready for use. 143 * After this call the pool/kmem memory allocators can be used. 144 */ 145 146 uvm_km_init(); 147 #ifdef __HAVE_PMAP_PV_TRACK 148 pmap_pv_init(); 149 #endif 150 151 #ifdef DEBUG 152 debug_init(); 153 #endif 154 155 /* 156 * Init all pagers and the pager_map. 157 */ 158 159 uvm_pager_init(); 160 161 /* 162 * Initialize the uvm_loan() facility. 163 */ 164 165 uvm_loan_init(); 166 167 /* 168 * Enable paging of kernel objects. 169 * This second pass of initializing kernel_object requires rw_obj, 170 * so initialize that first. 171 */ 172 173 rw_obj_init(); 174 uao_create(VM_MAX_KERNEL_ADDRESS - VM_MIN_KERNEL_ADDRESS, 175 UAO_FLAG_KERNSWAP); 176 177 uvmpdpol_reinit(); 178 179 /* 180 * Init anonymous memory systems. 181 */ 182 183 uvm_anon_init(); 184 185 uvm_uarea_init(); 186 187 /* 188 * Init readahead mechanism. 189 */ 190 191 uvm_ra_init(); 192 } 193