osfmk/vm/vm_init.c

   1 /*
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  28 /*
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  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
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  39  * software, derivative works or modified versions, and any portions
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  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
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  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 zlog_ready = FALSE;
  94
  95 vm_offset_t kmapoff_kaddr;
  96 unsigned 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
 103 void
 104 vm_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         if (!PE_parse_boot_argn("kmapoff", &kmapoff_pgcnt,
 144             sizeof (kmapoff_pgcnt)))
 145                 kmapoff_pgcnt = early_random() & 0x1ff; /* 9 bits */
 146
 147         if (kmapoff_pgcnt > 0 &&
 148             vm_allocate(kernel_map, &kmapoff_kaddr,
 149             kmapoff_pgcnt * PAGE_SIZE_64, VM_FLAGS_ANYWHERE) != KERN_SUCCESS)
 150                 panic("cannot vm_allocate %u kernel_map pages", kmapoff_pgcnt);
 151
 152         vm_mem_bootstrap_kprintf(("vm_mem_bootstrap: calling pmap_init\n"));
 153         pmap_init();
 154
 155         zlog_ready = TRUE;
 156
 157         if (PE_parse_boot_argn("zsize", &zsizearg, sizeof (zsizearg)))
 158                 zsize = zsizearg * 1024ULL * 1024ULL;
 159         else {
 160                 zsize = sane_size >> 2;                         /* Get target zone size as 1/4 of physical memory */
 161         }
 162
 163         if (zsize < ZONE_MAP_MIN)
 164                 zsize = ZONE_MAP_MIN;   /* Clamp to min */
 165 #if defined(__LP64__)
 166         zsize += zsize >> 1;
 167 #endif  /* __LP64__ */
 168         if (zsize > sane_size >> 1)
 169                 zsize = sane_size >> 1; /* Clamp to half of RAM max */
 170 #if !__LP64__
 171         if (zsize > ZONE_MAP_MAX)
 172                 zsize = ZONE_MAP_MAX;   /* Clamp to 1.5GB max for K32 */
 173 #endif /* !__LP64__ */
 174
 175         vm_mem_bootstrap_kprintf(("vm_mem_bootstrap: calling kext_alloc_init\n"));
 176         kext_alloc_init();
 177
 178         vm_mem_bootstrap_kprintf(("vm_mem_bootstrap: calling zone_init\n"));
 179         assert((vm_size_t) zsize == zsize);
 180         zone_init((vm_size_t) zsize);   /* Allocate address space for zones */
 181
 182         /* The vm_page_zone must be created prior to kalloc_init; that
 183          * routine can trigger zalloc()s (for e.g. mutex statistic structure
 184          * initialization). The vm_page_zone must exist to saisfy fictitious
 185          * page allocations (which are used for guard pages by the guard
 186          * mode zone allocator).
 187          */
 188         vm_mem_bootstrap_kprintf(("vm_mem_bootstrap: calling vm_page_module_init\n"));
 189         vm_page_module_init();
 190
 191         vm_mem_bootstrap_kprintf(("vm_mem_bootstrap: calling kalloc_init\n"));
 192         kalloc_init();
 193
 194         vm_mem_bootstrap_kprintf(("vm_mem_bootstrap: calling vm_fault_init\n"));
 195         vm_fault_init();
 196
 197         vm_mem_bootstrap_kprintf(("vm_mem_bootstrap: calling memory_manager_default_init\n"));
 198         memory_manager_default_init();
 199
 200         vm_mem_bootstrap_kprintf(("vm_mem_bootstrap: calling memory_object_control_bootstrap\n"));
 201         memory_object_control_bootstrap();
 202
 203         vm_mem_bootstrap_kprintf(("vm_mem_bootstrap: calling device_pager_bootstrap\n"));
 204         device_pager_bootstrap();
 205
 206         vm_paging_map_init();
 207
 208         vm_mem_bootstrap_kprintf(("vm_mem_bootstrap: done\n"));
 209 }
 210
 211 void
 212 vm_mem_init(void)
 213 {
 214         vm_object_init();
 215 }