osfmk/vm/vm_init.c

   1 /*
   2  * Copyright (c) 2000-2004 Apple Computer, Inc. All rights reserved.
   3  *
   4  * @APPLE_LICENSE_HEADER_START@
   5  *
   6  * The contents of this file constitute Original Code as defined in and
   7  * are subject to the Apple Public Source License Version 1.1 (the
   8  * "License").  You may not use this file except in compliance with the
   9  * License.  Please obtain a copy of the License at
  10  * http://www.apple.com/publicsource and read it before using this file.
  11  *
  12  * This Original Code and all software distributed under the License are
  13  * distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, EITHER
  14  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
  15  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
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  17  * License for the specific language governing rights and limitations
  18  * under the License.
  19  *
  20  * @APPLE_LICENSE_HEADER_END@
  21  */
  22 /*
  23  * @OSF_COPYRIGHT@
  24  */
  25 /*
  26  * Mach Operating System
  27  * Copyright (c) 1991,1990,1989,1988,1987 Carnegie Mellon University
  28  * All Rights Reserved.
  29  *
  30  * Permission to use, copy, modify and distribute this software and its
  31  * documentation is hereby granted, provided that both the copyright
  32  * notice and this permission notice appear in all copies of the
  33  * software, derivative works or modified versions, and any portions
  34  * thereof, and that both notices appear in supporting documentation.
  35  *
  36  * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
  37  * CONDITION.  CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND FOR
  38  * ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
  39  *
  40  * Carnegie Mellon requests users of this software to return to
  41  *
  42  *  Software Distribution Coordinator  or  Software.Distribution@CS.CMU.EDU
  43  *  School of Computer Science
  44  *  Carnegie Mellon University
  45  *  Pittsburgh PA 15213-3890
  46  *
  47  * any improvements or extensions that they make and grant Carnegie Mellon
  48  * the rights to redistribute these changes.
  49  */
  50 /*
  51  */
  52 /*
  53  *      File:   vm/vm_init.c
  54  *      Author: Avadis Tevanian, Jr., Michael Wayne Young
  55  *      Date:   1985
  56  *
  57  *      Initialize the Virtual Memory subsystem.
  58  */
  59
  60 #include <mach/machine/vm_types.h>
  61 #include <kern/zalloc.h>
  62 #include <kern/kalloc.h>
  63 #include <vm/vm_object.h>
  64 #include <vm/vm_map.h>
  65 #include <vm/vm_page.h>
  66 #include <vm/vm_kern.h>
  67 #include <vm/memory_object.h>
  68 #include <vm/vm_fault.h>
  69 #include <vm/vm_init.h>
  70
  71 #include <pexpert/pexpert.h>
  72
  73 #include <vm/vm_protos.h>
  74
  75 #define ZONE_MAP_MIN (12 * 1024 * 1024)
  76 /* Maximum Zone size is 1G */
  77 #define ZONE_MAP_MAX (1024 * 1024 * 1024)
  78
  79 const vm_offset_t vm_min_kernel_address = VM_MIN_KERNEL_ADDRESS;
  80 const vm_offset_t vm_max_kernel_address = VM_MAX_KERNEL_ADDRESS;
  81
  82 /*
  83  *      vm_mem_bootstrap initializes the virtual memory system.
  84  *      This is done only by the first cpu up.
  85  */
  86
  87 void
  88 vm_mem_bootstrap(void)
  89 {
  90         vm_offset_t     start, end;
  91         vm_size_t zsizearg;
  92         mach_vm_size_t zsize;
  93
  94         /*
  95          *      Initializes resident memory structures.
  96          *      From here on, all physical memory is accounted for,
  97          *      and we use only virtual addresses.
  98          */
  99
 100         vm_page_bootstrap(&start, &end);
 101
 102         /*
 103          *      Initialize other VM packages
 104          */
 105
 106         zone_bootstrap();
 107         vm_object_bootstrap();
 108         vm_map_init();
 109         kmem_init(start, end);
 110         pmap_init();
 111
 112         if (PE_parse_boot_arg("zsize", &zsizearg))
 113                 zsize = zsizearg * 1024ULL * 1024ULL;
 114         else {
 115                 zsize = sane_size >> 2;                         /* Get target zone size as 1/4 of physical memory */
 116         }
 117
 118         if(zsize < ZONE_MAP_MIN) zsize = ZONE_MAP_MIN;  /* Clamp to min */
 119         if(zsize > ZONE_MAP_MAX) zsize = ZONE_MAP_MAX;  /* Clamp to max */
 120         zone_init(zsize);                                               /* Allocate address space for zones */
 121
 122         kalloc_init();
 123         vm_fault_init();
 124         vm_page_module_init();
 125         memory_manager_default_init();
 126         memory_object_control_bootstrap();
 127         device_pager_bootstrap();
 128 }
 129
 130 void
 131 vm_mem_init(void)
 132 {
 133         vm_object_init();
 134 }