1/* 2 * Copyright (c) 2000-2011 Apple Inc. All rights reserved. 3 * 4 * @APPLE_OSREFERENCE_LICENSE_HEADER_START@ 5 * 6 * This file contains Original Code and/or Modifications of Original Code 7 * as defined in and that are subject to the Apple Public Source License 8 * Version 2.0 (the 'License'). You may not use this file except in 9 * compliance with the License. The rights granted to you under the License 10 * may not be used to create, or enable the creation or redistribution of, 11 * unlawful or unlicensed copies of an Apple operating system, or to 12 * circumvent, violate, or enable the circumvention or violation of, any 13 * terms of an Apple operating system software license agreement. 14 * 15 * Please obtain a copy of the License at 16 * http://www.opensource.apple.com/apsl/ and read it before using this file. 17 * 18 * The Original Code and all software distributed under the License are 19 * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER 20 * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES, 21 * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY, 22 * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT. 23 * Please see the License for the specific language governing rights and 24 * limitations under the License. 25 * 26 * @APPLE_OSREFERENCE_LICENSE_HEADER_END@ 27 */ 28/* 29 * @OSF_COPYRIGHT@ 30 */ 31/* 32 * Mach Operating System 33 * Copyright (c) 1991,1990,1989,1988,1987 Carnegie Mellon University 34 * All Rights Reserved. 35 * 36 * Permission to use, copy, modify and distribute this software and its 37 * documentation is hereby granted, provided that both the copyright 38 * notice and this permission notice appear in all copies of the 39 * software, derivative works or modified versions, and any portions 40 * thereof, and that both notices appear in supporting documentation. 41 * 42 * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS" 43 * CONDITION. CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND FOR 44 * ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE. 45 * 46 * Carnegie Mellon requests users of this software to return to 47 * 48 * Software Distribution Coordinator or Software.Distribution@CS.CMU.EDU 49 * School of Computer Science 50 * Carnegie Mellon University 51 * Pittsburgh PA 15213-3890 52 * 53 * any improvements or extensions that they make and grant Carnegie Mellon 54 * the rights to redistribute these changes. 55 */ 56/* 57 */ 58/* 59 * File: vm/vm_init.c 60 * Author: Avadis Tevanian, Jr., Michael Wayne Young 61 * Date: 1985 62 * 63 * Initialize the Virtual Memory subsystem. 64 */ 65 66#include <mach/machine/vm_types.h> 67#include <mach/vm_map.h> 68#include <kern/zalloc.h> 69#include <kern/kalloc.h> 70#include <kern/kext_alloc.h> 71#include <vm/vm_object.h> 72#include <vm/vm_map.h> 73#include <vm/vm_page.h> 74#include <vm/vm_kern.h> 75#include <vm/memory_object.h> 76#include <vm/vm_fault.h> 77#include <vm/vm_init.h> 78 79#include <pexpert/pexpert.h> 80 81#include <vm/vm_protos.h> 82 83#define ZONE_MAP_MIN CONFIG_ZONE_MAP_MIN 84 85/* Maximum zone size is 1.5G */ 86#define ZONE_MAP_MAX (1024 * 1024 * 1536) 87 88const vm_offset_t vm_min_kernel_address = VM_MIN_KERNEL_AND_KEXT_ADDRESS; 89const vm_offset_t vm_max_kernel_address = VM_MAX_KERNEL_ADDRESS; 90 91boolean_t vm_kernel_ready = FALSE; 92boolean_t kmem_ready = FALSE; 93boolean_t zlog_ready = FALSE; 94 95vm_offset_t kmapoff_kaddr; 96unsigned int kmapoff_pgcnt; 97 98/* 99 * vm_mem_bootstrap initializes the virtual memory system. 100 * This is done only by the first cpu up. 101 */ 102 103void 104vm_mem_bootstrap(void) 105{ 106 vm_offset_t start, end; 107 vm_size_t zsizearg; 108 mach_vm_size_t zsize; 109 110 /* 111 * Initializes resident memory structures. 112 * From here on, all physical memory is accounted for, 113 * and we use only virtual addresses. 114 */ 115#define vm_mem_bootstrap_kprintf(x) /* kprintf(x) */ 116 117 vm_mem_bootstrap_kprintf(("vm_mem_bootstrap: calling vm_page_bootstrap\n")); 118 vm_page_bootstrap(&start, &end); 119 120 /* 121 * Initialize other VM packages 122 */ 123 124 vm_mem_bootstrap_kprintf(("vm_mem_bootstrap: calling zone_bootstrap\n")); 125 zone_bootstrap(); 126 127 vm_mem_bootstrap_kprintf(("vm_mem_bootstrap: calling vm_object_bootstrap\n")); 128 vm_object_bootstrap(); 129 130 vm_kernel_ready = TRUE; 131 132 vm_mem_bootstrap_kprintf(("vm_mem_bootstrap: calling vm_map_init\n")); 133 vm_map_init(); 134 135 vm_mem_bootstrap_kprintf(("vm_mem_bootstrap: calling kmem_init\n")); 136 kmem_init(start, end); 137 kmem_ready = TRUE; 138 /* 139 * Eat a random amount of kernel_map to fuzz subsequent heap, zone and 140 * stack addresses. (With a 4K page and 9 bits of randomness, this 141 * eats at most 2M of VA from the map.) 142 */ 143 kmapoff_pgcnt = 0; 144 145 vm_mem_bootstrap_kprintf(("vm_mem_bootstrap: calling pmap_init\n")); 146 pmap_init(); 147 148 zlog_ready = TRUE; 149 150 if (PE_parse_boot_argn("zsize", &zsizearg, sizeof (zsizearg))) 151 zsize = zsizearg * 1024ULL * 1024ULL; 152 else { 153 zsize = sane_size >> 2; /* Get target zone size as 1/4 of physical memory */ 154 } 155 156 if (zsize < ZONE_MAP_MIN) 157 zsize = ZONE_MAP_MIN; /* Clamp to min */ 158#if defined(__LP64__) 159 zsize += zsize >> 1; 160#endif /* __LP64__ */ 161 if (zsize > sane_size >> 1) 162 zsize = sane_size >> 1; /* Clamp to half of RAM max */ 163#if !__LP64__ 164 if (zsize > ZONE_MAP_MAX) 165 zsize = ZONE_MAP_MAX; /* Clamp to 1.5GB max for K32 */ 166#endif /* !__LP64__ */ 167 168 vm_mem_bootstrap_kprintf(("vm_mem_bootstrap: calling kext_alloc_init\n")); 169 kext_alloc_init(); 170 171 vm_mem_bootstrap_kprintf(("vm_mem_bootstrap: calling zone_init\n")); 172 assert((vm_size_t) zsize == zsize); 173 zone_init((vm_size_t) zsize); /* Allocate address space for zones */ 174 175 /* The vm_page_zone must be created prior to kalloc_init; that 176 * routine can trigger zalloc()s (for e.g. mutex statistic structure 177 * initialization). The vm_page_zone must exist to saisfy fictitious 178 * page allocations (which are used for guard pages by the guard 179 * mode zone allocator). 180 */ 181 vm_mem_bootstrap_kprintf(("vm_mem_bootstrap: calling vm_page_module_init\n")); 182 vm_page_module_init(); 183 184 vm_mem_bootstrap_kprintf(("vm_mem_bootstrap: calling kalloc_init\n")); 185 kalloc_init(); 186 187 vm_mem_bootstrap_kprintf(("vm_mem_bootstrap: calling vm_fault_init\n")); 188 vm_fault_init(); 189 190 vm_mem_bootstrap_kprintf(("vm_mem_bootstrap: calling memory_manager_default_init\n")); 191 memory_manager_default_init(); 192 193 vm_mem_bootstrap_kprintf(("vm_mem_bootstrap: calling memory_object_control_bootstrap\n")); 194 memory_object_control_bootstrap(); 195 196 vm_mem_bootstrap_kprintf(("vm_mem_bootstrap: calling device_pager_bootstrap\n")); 197 device_pager_bootstrap(); 198 199 vm_paging_map_init(); 200 201 vm_mem_bootstrap_kprintf(("vm_mem_bootstrap: done\n")); 202} 203 204void 205vm_mem_init(void) 206{ 207 vm_object_init(); 208} 209