1 /* $NetBSD: uvm_init.c,v 1.60 2025/11/05 00:39:46 thorpej 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 1.60 2025/11/05 00:39:46 thorpej 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 #include <sys/rndsource.h> 47 48 #include <uvm/uvm.h> 49 #include <uvm/uvm_pdpolicy.h> 50 #include <uvm/uvm_physseg.h> 51 #include <uvm/uvm_readahead.h> 52 #include <uvm/uvm_rndsource.h> 53 54 /* 55 * struct uvm: we store most 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 struct uvm_object *uvm_kernel_object; 62 63 #if defined(__uvmexp_pagesize) 64 const int * const uvmexp_pagesize = &uvmexp.pagesize; 65 const int * const uvmexp_pagemask = &uvmexp.pagemask; 66 const int * const uvmexp_pageshift = &uvmexp.pageshift; 67 #endif 68 69 kmutex_t uvm_kentry_lock __cacheline_aligned; 70 71 struct krndsource uvm_fault_rndsource; 72 73 /* 74 * uvm_md_init: Init dependant on the MD boot context. 75 * called from MD code. 76 */ 77 78 void 79 uvm_md_init(void) 80 { 81 static bool uvm_md_initialized; 82 83 if (! uvm_md_initialized) { 84 uvm_setpagesize(); /* initialize PAGE_SIZE-dependent vars */ 85 uvm_physseg_init(); 86 uvm_md_initialized = true; 87 } 88 } 89 90 /* 91 * uvm_init: init the VM system. called from kern/init_main.c. 92 */ 93 94 void 95 uvm_init(void) 96 { 97 vaddr_t kvm_start, kvm_end; 98 99 /* 100 * Ensure that the hardware set the page size, zero the UVM structure. 101 */ 102 103 if (uvmexp.pagesize == 0) { 104 panic("uvm_init: page size not set"); 105 } 106 107 memset(&uvm, 0, sizeof(uvm)); 108 averunnable.fscale = FSCALE; 109 110 /* 111 * Init the page sub-system. This includes allocating the vm_page 112 * structures, and setting up all the page queues (and locks). 113 * Available memory will be put in the "free" queue, kvm_start and 114 * kvm_end will be set to the area of kernel virtual memory which 115 * is available for general use. 116 */ 117 118 uvm_page_init(&kvm_start, &kvm_end); 119 uvm_pglistalloc_init(); 120 121 /* 122 * Init the map sub-system. 123 */ 124 125 uvm_map_init(); 126 127 /* 128 * Setup the kernel's virtual memory data structures. This includes 129 * setting up the kernel_map/kernel_object. 130 * Bootstrap all kernel memory allocators. 131 */ 132 133 uao_init(); 134 uvm_km_bootstrap(kvm_start, kvm_end); 135 136 /* 137 * Setup uvm_map caches and init the amap. 138 */ 139 140 uvm_map_init_caches(); 141 uvm_amap_init(); 142 143 /* 144 * Init the pmap module. The pmap module is free to allocate 145 * memory for its private use (e.g. pvlists). 146 */ 147 148 pmap_init(); 149 150 /* 151 * Make kernel memory allocators ready for use. 152 * After this call the pool/kmem memory allocators can be used. 153 */ 154 155 uvm_km_init(); 156 #ifdef __HAVE_PMAP_PV_TRACK 157 pmap_pv_init(); 158 #endif 159 160 #ifdef DEBUG 161 debug_init(); 162 #endif 163 164 /* 165 * Init all pagers and the pager_map. 166 */ 167 168 uvm_pager_init(); 169 170 /* 171 * Initialize the uvm_loan() facility. 172 */ 173 174 uvm_loan_init(); 175 176 /* 177 * Enable paging of kernel objects. 178 * This second pass of initializing kernel_object requires rw_obj, 179 * so initialize that first. 180 */ 181 182 uao_create(VM_MAX_KERNEL_ADDRESS - VM_MIN_KERNEL_ADDRESS, 183 UAO_FLAG_KERNSWAP); 184 185 uvmpdpol_reinit(); 186 187 /* 188 * Init anonymous memory systems. 189 */ 190 191 uvm_anon_init(); 192 193 uvm_uarea_init(); 194 195 /* 196 * Init readahead mechanism. 197 */ 198 199 uvm_ra_init(); 200 201 /* 202 * Initialize random source for page fault events. 203 */ 204 205 rnd_attach_source(&uvm_fault_rndsource, "uvmfault", RND_TYPE_VM, 206 RND_FLAG_COLLECT_TIME|RND_FLAG_COLLECT_VALUE| 207 RND_FLAG_ESTIMATE_VALUE); 208 } 209
Indexes created Thu Nov 06 05:09:59 GMT 2025