vm_init.c revision 133253
1/* 2 * Copyright (c) 1991, 1993 3 * The Regents of the University of California. All rights reserved. 4 * 5 * This code is derived from software contributed to Berkeley by 6 * The Mach Operating System project at Carnegie-Mellon University. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 1. Redistributions of source code must retain the above copyright 12 * notice, this list of conditions and the following disclaimer. 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in the 15 * documentation and/or other materials provided with the distribution. 16 * 4. Neither the name of the University nor the names of its contributors 17 * may be used to endorse or promote products derived from this software 18 * without specific prior written permission. 19 * 20 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 21 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 22 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 23 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 24 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 25 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 26 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 27 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 28 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 29 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 30 * SUCH DAMAGE. 31 * 32 * from: @(#)vm_init.c 8.1 (Berkeley) 6/11/93 33 * 34 * 35 * Copyright (c) 1987, 1990 Carnegie-Mellon University. 36 * All rights reserved. 37 * 38 * Authors: Avadis Tevanian, Jr., Michael Wayne Young 39 * 40 * Permission to use, copy, modify and distribute this software and 41 * its documentation is hereby granted, provided that both the copyright 42 * notice and this permission notice appear in all copies of the 43 * software, derivative works or modified versions, and any portions 44 * thereof, and that both notices appear in supporting documentation. 45 * 46 * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS" 47 * CONDITION. CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND 48 * FOR ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE. 49 * 50 * Carnegie Mellon requests users of this software to return to 51 * 52 * Software Distribution Coordinator or Software.Distribution@CS.CMU.EDU 53 * School of Computer Science 54 * Carnegie Mellon University 55 * Pittsburgh PA 15213-3890 56 * 57 * any improvements or extensions that they make and grant Carnegie the 58 * rights to redistribute these changes. 59 */ 60 61/* 62 * Initialize the Virtual Memory subsystem. 63 */ 64 65#include <sys/cdefs.h> 66__FBSDID("$FreeBSD: head/sys/vm/vm_init.c 133253 2004-08-07 05:58:31Z alc $"); 67 68#include <sys/param.h> 69#include <sys/kernel.h> 70#include <sys/lock.h> 71#include <sys/mutex.h> 72#include <sys/proc.h> 73#include <sys/systm.h> 74#include <sys/selinfo.h> 75#include <sys/pipe.h> 76#include <sys/bio.h> 77#include <sys/buf.h> 78 79#include <vm/vm.h> 80#include <vm/vm_param.h> 81#include <vm/vm_kern.h> 82#include <vm/vm_object.h> 83#include <vm/vm_page.h> 84#include <vm/vm_map.h> 85#include <vm/vm_pager.h> 86#include <vm/vm_extern.h> 87 88long physmem; 89 90/* 91 * System initialization 92 */ 93static void vm_mem_init(void *); 94SYSINIT(vm_mem, SI_SUB_VM, SI_ORDER_FIRST, vm_mem_init, NULL) 95 96/* 97 * vm_init initializes the virtual memory system. 98 * This is done only by the first cpu up. 99 * 100 * The start and end address of physical memory is passed in. 101 */ 102/* ARGSUSED*/ 103static void 104vm_mem_init(dummy) 105 void *dummy; 106{ 107 /* 108 * Initializes resident memory structures. From here on, all physical 109 * memory is accounted for, and we use only virtual addresses. 110 */ 111 vm_set_page_size(); 112 virtual_avail = vm_page_startup(virtual_avail); 113 114 /* 115 * Initialize other VM packages 116 */ 117 vm_object_init(); 118 vm_map_startup(); 119 kmem_init(virtual_avail, virtual_end); 120 pmap_init(); 121 vm_pager_init(); 122} 123 124void 125vm_ksubmap_init(struct kva_md_info *kmi) 126{ 127 vm_offset_t firstaddr; 128 caddr_t v; 129 vm_size_t size = 0; 130 long physmem_est; 131 vm_offset_t minaddr; 132 vm_offset_t maxaddr; 133 vm_map_t clean_map; 134 135 /* 136 * Allocate space for system data structures. 137 * The first available kernel virtual address is in "v". 138 * As pages of kernel virtual memory are allocated, "v" is incremented. 139 * As pages of memory are allocated and cleared, 140 * "firstaddr" is incremented. 141 * An index into the kernel page table corresponding to the 142 * virtual memory address maintained in "v" is kept in "mapaddr". 143 */ 144 145 /* 146 * Make two passes. The first pass calculates how much memory is 147 * needed and allocates it. The second pass assigns virtual 148 * addresses to the various data structures. 149 */ 150 firstaddr = 0; 151again: 152 v = (caddr_t)firstaddr; 153 154 v = kern_timeout_callwheel_alloc(v); 155 156 /* 157 * Discount the physical memory larger than the size of kernel_map 158 * to avoid eating up all of KVA space. 159 */ 160 physmem_est = lmin(physmem, btoc(kernel_map->max_offset - 161 kernel_map->min_offset)); 162 163 v = kern_vfs_bio_buffer_alloc(v, physmem_est); 164 165 /* 166 * End of first pass, size has been calculated so allocate memory 167 */ 168 if (firstaddr == 0) { 169 size = (vm_size_t)v; 170 firstaddr = kmem_alloc(kernel_map, round_page(size)); 171 if (firstaddr == 0) 172 panic("startup: no room for tables"); 173 goto again; 174 } 175 176 /* 177 * End of second pass, addresses have been assigned 178 */ 179 if ((vm_size_t)((char *)v - firstaddr) != size) 180 panic("startup: table size inconsistency"); 181 182 clean_map = kmem_suballoc(kernel_map, &kmi->clean_sva, &kmi->clean_eva, 183 (nbuf*BKVASIZE) + (nswbuf*MAXPHYS)); 184 buffer_map = kmem_suballoc(clean_map, &kmi->buffer_sva, 185 &kmi->buffer_eva, (nbuf*BKVASIZE)); 186 buffer_map->system_map = 1; 187 pager_map = kmem_suballoc(clean_map, &kmi->pager_sva, &kmi->pager_eva, 188 (nswbuf*MAXPHYS)); 189 pager_map->system_map = 1; 190 exec_map = kmem_suballoc(kernel_map, &minaddr, &maxaddr, 191 (16*(ARG_MAX+(PAGE_SIZE*3)))); 192 pipe_map = kmem_suballoc(kernel_map, &minaddr, &maxaddr, maxpipekva); 193 194 /* 195 * XXX: Mbuf system machine-specific initializations should 196 * go here, if anywhere. 197 */ 198 199 /* 200 * Initialize the callouts we just allocated. 201 */ 202 kern_timeout_callwheel_init(); 203} 204 205