1/* $NetBSD: uvm_init.c,v 1.59 2023/09/23 18:21:12 ad 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 1.59 2023/09/23 18:21:12 ad 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 59struct uvm uvm; /* decl */ 60struct uvmexp uvmexp; /* decl */ 61struct uvm_object *uvm_kernel_object; 62 63#if defined(__uvmexp_pagesize) 64const int * const uvmexp_pagesize = &uvmexp.pagesize; 65const int * const uvmexp_pagemask = &uvmexp.pagemask; 66const int * const uvmexp_pageshift = &uvmexp.pageshift; 67#endif 68 69kmutex_t uvm_kentry_lock __cacheline_aligned; 70 71struct krndsource uvm_fault_rndsource; 72 73/* 74 * uvm_md_init: Init dependant on the MD boot context. 75 * called from MD code. 76 */ 77 78void 79uvm_md_init(void) 80{ 81 uvm_setpagesize(); /* initialize PAGE_SIZE-dependent variables */ 82 uvm_physseg_init(); 83} 84 85/* 86 * uvm_init: init the VM system. called from kern/init_main.c. 87 */ 88 89void 90uvm_init(void) 91{ 92 vaddr_t kvm_start, kvm_end; 93 94 /* 95 * Ensure that the hardware set the page size, zero the UVM structure. 96 */ 97 98 if (uvmexp.pagesize == 0) { 99 panic("uvm_init: page size not set"); 100 } 101 102 memset(&uvm, 0, sizeof(uvm)); 103 averunnable.fscale = FSCALE; 104 105 /* 106 * Init the page sub-system. This includes allocating the vm_page 107 * structures, and setting up all the page queues (and locks). 108 * Available memory will be put in the "free" queue, kvm_start and 109 * kvm_end will be set to the area of kernel virtual memory which 110 * is available for general use. 111 */ 112 113 uvm_page_init(&kvm_start, &kvm_end); 114 uvm_pglistalloc_init(); 115 116 /* 117 * Init the map sub-system. 118 */ 119 120 uvm_map_init(); 121 122 /* 123 * Setup the kernel's virtual memory data structures. This includes 124 * setting up the kernel_map/kernel_object. 125 * Bootstrap all kernel memory allocators. 126 */ 127 128 uao_init(); 129 uvm_km_bootstrap(kvm_start, kvm_end); 130 131 /* 132 * Setup uvm_map caches and init the amap. 133 */ 134 135 uvm_map_init_caches(); 136 uvm_amap_init(); 137 138 /* 139 * Init the pmap module. The pmap module is free to allocate 140 * memory for its private use (e.g. pvlists). 141 */ 142 143 pmap_init(); 144 145 /* 146 * Make kernel memory allocators ready for use. 147 * After this call the pool/kmem memory allocators can be used. 148 */ 149 150 uvm_km_init(); 151#ifdef __HAVE_PMAP_PV_TRACK 152 pmap_pv_init(); 153#endif 154 155#ifdef DEBUG 156 debug_init(); 157#endif 158 159 /* 160 * Init all pagers and the pager_map. 161 */ 162 163 uvm_pager_init(); 164 165 /* 166 * Initialize the uvm_loan() facility. 167 */ 168 169 uvm_loan_init(); 170 171 /* 172 * Enable paging of kernel objects. 173 * This second pass of initializing kernel_object requires rw_obj, 174 * so initialize that first. 175 */ 176 177 uao_create(VM_MAX_KERNEL_ADDRESS - VM_MIN_KERNEL_ADDRESS, 178 UAO_FLAG_KERNSWAP); 179 180 uvmpdpol_reinit(); 181 182 /* 183 * Init anonymous memory systems. 184 */ 185 186 uvm_anon_init(); 187 188 uvm_uarea_init(); 189 190 /* 191 * Init readahead mechanism. 192 */ 193 194 uvm_ra_init(); 195 196 /* 197 * Initialize random source for page fault events. 198 */ 199 200 rnd_attach_source(&uvm_fault_rndsource, "uvmfault", RND_TYPE_VM, 201 RND_FLAG_COLLECT_TIME|RND_FLAG_COLLECT_VALUE| 202 RND_FLAG_ESTIMATE_VALUE); 203} 204