osfmk/vm/vm_init.c

   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
  88 const vm_offset_t vm_min_kernel_address = VM_MIN_KERNEL_AND_KEXT_ADDRESS;
  89 const vm_offset_t vm_max_kernel_address = VM_MAX_KERNEL_ADDRESS;
  90
  91 boolean_t vm_kernel_ready = FALSE;
  92 boolean_t kmem_ready = FALSE;
  93 boolean_t kmem_alloc_ready = FALSE;
  94 boolean_t zlog_ready = FALSE;
  95
  96 vm_offset_t kmapoff_kaddr;
  97 unsigned int kmapoff_pgcnt;
  98
  99 /*
 100  *      vm_mem_bootstrap initializes the virtual memory system.
 101  *      This is done only by the first cpu up.
 102  */
 103
 104 void
 105 vm_mem_bootstrap(void)
 106 {
 107         vm_offset_t     start, end;
 108         vm_size_t zsizearg;
 109         mach_vm_size_t zsize;
 110
 111         /*
 112          *      Initializes resident memory structures.
 113          *      From here on, all physical memory is accounted for,
 114          *      and we use only virtual addresses.
 115          */
 116 #define vm_mem_bootstrap_kprintf(x) /* kprintf(x) */
 117
 118         vm_mem_bootstrap_kprintf(("vm_mem_bootstrap: calling vm_page_bootstrap\n"));
 119         vm_page_bootstrap(&start, &end);
 120
 121         /*
 122          *      Initialize other VM packages
 123          */
 124
 125         vm_mem_bootstrap_kprintf(("vm_mem_bootstrap: calling zone_bootstrap\n"));
 126         zone_bootstrap();
 127
 128         vm_mem_bootstrap_kprintf(("vm_mem_bootstrap: calling vm_object_bootstrap\n"));
 129         vm_object_bootstrap();
 130
 131         vm_kernel_ready = TRUE;
 132
 133         vm_mem_bootstrap_kprintf(("vm_mem_bootstrap: calling vm_map_init\n"));
 134         vm_map_init();
 135
 136         vm_mem_bootstrap_kprintf(("vm_mem_bootstrap: calling kmem_init\n"));
 137         kmem_init(start, end);
 138         kmem_ready = TRUE;
 139         /*
 140          * Eat a random amount of kernel_map to fuzz subsequent heap, zone and
 141          * stack addresses. (With a 4K page and 9 bits of randomness, this
 142          * eats at most 2M of VA from the map.)
 143          */
 144         if (!PE_parse_boot_argn("kmapoff", &kmapoff_pgcnt,
 145             sizeof (kmapoff_pgcnt)))
 146                 kmapoff_pgcnt = early_random() & 0x1ff; /* 9 bits */
 147
 148         if (kmapoff_pgcnt > 0 &&
 149             vm_allocate(kernel_map, &kmapoff_kaddr,
 150             kmapoff_pgcnt * PAGE_SIZE_64, VM_FLAGS_ANYWHERE) != KERN_SUCCESS)
 151                 panic("cannot vm_allocate %u kernel_map pages", kmapoff_pgcnt);
 152
 153         vm_mem_bootstrap_kprintf(("vm_mem_bootstrap: calling pmap_init\n"));
 154         pmap_init();
 155
 156         kmem_alloc_ready = TRUE;
 157
 158         if (PE_parse_boot_argn("zsize", &zsizearg, sizeof (zsizearg)))
 159                 zsize = zsizearg * 1024ULL * 1024ULL;
 160         else {
 161                 zsize = sane_size >> 2;                         /* Get target zone size as 1/4 of physical memory */
 162         }
 163
 164         if (zsize < ZONE_MAP_MIN)
 165                 zsize = ZONE_MAP_MIN;   /* Clamp to min */
 166 #if defined(__LP64__)
 167         zsize += zsize >> 1;
 168 #endif  /* __LP64__ */
 169         if (zsize > sane_size >> 1)
 170                 zsize = sane_size >> 1; /* Clamp to half of RAM max */
 171 #if !__LP64__
 172         if (zsize > ZONE_MAP_MAX)
 173                 zsize = ZONE_MAP_MAX;   /* Clamp to 1.5GB max for K32 */
 174 #endif /* !__LP64__ */
 175
 176         vm_mem_bootstrap_kprintf(("vm_mem_bootstrap: calling kext_alloc_init\n"));
 177         kext_alloc_init();
 178
 179         vm_mem_bootstrap_kprintf(("vm_mem_bootstrap: calling zone_init\n"));
 180         assert((vm_size_t) zsize == zsize);
 181         zone_init((vm_size_t) zsize);   /* Allocate address space for zones */
 182
 183         /* The vm_page_zone must be created prior to kalloc_init; that
 184          * routine can trigger zalloc()s (for e.g. mutex statistic structure
 185          * initialization). The vm_page_zone must exist to saisfy fictitious
 186          * page allocations (which are used for guard pages by the guard
 187          * mode zone allocator).
 188          */
 189         vm_mem_bootstrap_kprintf(("vm_mem_bootstrap: calling vm_page_module_init\n"));
 190         vm_page_module_init();
 191
 192         vm_mem_bootstrap_kprintf(("vm_mem_bootstrap: calling kalloc_init\n"));
 193         kalloc_init();
 194
 195         vm_mem_bootstrap_kprintf(("vm_mem_bootstrap: calling vm_fault_init\n"));
 196         vm_fault_init();
 197
 198         vm_mem_bootstrap_kprintf(("vm_mem_bootstrap: calling memory_manager_default_init\n"));
 199         memory_manager_default_init();
 200
 201         vm_mem_bootstrap_kprintf(("vm_mem_bootstrap: calling memory_object_control_bootstrap\n"));
 202         memory_object_control_bootstrap();
 203
 204         vm_mem_bootstrap_kprintf(("vm_mem_bootstrap: calling device_pager_bootstrap\n"));
 205         device_pager_bootstrap();
 206
 207         vm_paging_map_init();
 208
 209         vm_mem_bootstrap_kprintf(("vm_mem_bootstrap: done\n"));
 210 }
 211
 212 void
 213 vm_mem_init(void)
 214 {
 215         vm_object_init();
 216 }