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
  40  * thereof, and that both notices appear in supporting documentation.
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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 <sys/kdebug.h>
  72 #include <vm/vm_object.h>
  73 #include <vm/vm_map.h>
  74 #include <vm/vm_page.h>
  75 #include <vm/vm_kern.h>
  76 #include <vm/memory_object.h>
  77 #include <vm/vm_fault.h>
  78 #include <vm/vm_init.h>
  79
  80 #include <pexpert/pexpert.h>
  81
  82 #include <vm/vm_protos.h>
  83
  84 #define ZONE_MAP_MIN CONFIG_ZONE_MAP_MIN
  85
  86 /* Maximum zone size is 1.5G */
  87 #define ZONE_MAP_MAX (1024 * 1024 * 1536)
  88
  89 const vm_offset_t vm_min_kernel_address = VM_MIN_KERNEL_AND_KEXT_ADDRESS;
  90 const vm_offset_t vm_max_kernel_address = VM_MAX_KERNEL_ADDRESS;
  91
  92 boolean_t vm_kernel_ready = FALSE;
  93 boolean_t kmem_ready = FALSE;
  94 boolean_t kmem_alloc_ready = FALSE;
  95 boolean_t zlog_ready = FALSE;
  96
  97 vm_offset_t kmapoff_kaddr;
  98 unsigned int kmapoff_pgcnt;
  99
 100
 101 static inline void
 102 vm_mem_bootstrap_log(const char *message)
 103 {
 104 //      kprintf("vm_mem_bootstrap: %s\n", message);
 105         kernel_debug_string_early(message);
 106 }
 107
 108 /*
 109  *      vm_mem_bootstrap initializes the virtual memory system.
 110  *      This is done only by the first cpu up.
 111  */
 112
 113 void
 114 vm_mem_bootstrap(void)
 115 {
 116         vm_offset_t     start, end;
 117         vm_size_t zsizearg;
 118         mach_vm_size_t zsize;
 119
 120         /*
 121          *      Initializes resident memory structures.
 122          *      From here on, all physical memory is accounted for,
 123          *      and we use only virtual addresses.
 124          */
 125         vm_mem_bootstrap_log("vm_page_bootstrap");
 126         vm_page_bootstrap(&start, &end);
 127
 128         /*
 129          *      Initialize other VM packages
 130          */
 131
 132         vm_mem_bootstrap_log("zone_bootstrap");
 133         zone_bootstrap();
 134
 135         vm_mem_bootstrap_log("vm_object_bootstrap");
 136         vm_object_bootstrap();
 137
 138         vm_kernel_ready = TRUE;
 139
 140         vm_mem_bootstrap_log("vm_map_init");
 141         vm_map_init();
 142
 143         vm_mem_bootstrap_log("kmem_init");
 144         kmem_init(start, end);
 145         kmem_ready = TRUE;
 146         /*
 147          * Eat a random amount of kernel_map to fuzz subsequent heap, zone and
 148          * stack addresses. (With a 4K page and 9 bits of randomness, this
 149          * eats at most 2M of VA from the map.)
 150          */
 151         if (!PE_parse_boot_argn("kmapoff", &kmapoff_pgcnt,
 152             sizeof (kmapoff_pgcnt)))
 153                 kmapoff_pgcnt = early_random() & 0x1ff; /* 9 bits */
 154
 155         if (kmapoff_pgcnt > 0 &&
 156             vm_allocate(kernel_map, &kmapoff_kaddr,
 157             kmapoff_pgcnt * PAGE_SIZE_64, VM_FLAGS_ANYWHERE | VM_MAKE_TAG(VM_KERN_MEMORY_OSFMK)) != KERN_SUCCESS)
 158                 panic("cannot vm_allocate %u kernel_map pages", kmapoff_pgcnt);
 159
 160
 161         vm_mem_bootstrap_log("pmap_init");
 162         pmap_init();
 163
 164         kmem_alloc_ready = TRUE;
 165
 166         if (PE_parse_boot_argn("zsize", &zsizearg, sizeof (zsizearg)))
 167                 zsize = zsizearg * 1024ULL * 1024ULL;
 168         else {
 169                 zsize = sane_size >> 2;                         /* Get target zone size as 1/4 of physical memory */
 170         }
 171
 172         if (zsize < ZONE_MAP_MIN)
 173                 zsize = ZONE_MAP_MIN;   /* Clamp to min */
 174 #if defined(__LP64__)
 175         zsize += zsize >> 1;
 176 #endif  /* __LP64__ */
 177         if (zsize > sane_size >> 1)
 178                 zsize = sane_size >> 1; /* Clamp to half of RAM max */
 179 #if !__LP64__
 180         if (zsize > ZONE_MAP_MAX)
 181                 zsize = ZONE_MAP_MAX;   /* Clamp to 1.5GB max for K32 */
 182 #endif /* !__LP64__ */
 183
 184         vm_mem_bootstrap_log("kext_alloc_init");
 185         kext_alloc_init();
 186
 187         vm_mem_bootstrap_log("zone_init");
 188         assert((vm_size_t) zsize == zsize);
 189         zone_init((vm_size_t) zsize);   /* Allocate address space for zones */
 190
 191         /* The vm_page_zone must be created prior to kalloc_init; that
 192          * routine can trigger zalloc()s (for e.g. mutex statistic structure
 193          * initialization). The vm_page_zone must exist to saisfy fictitious
 194          * page allocations (which are used for guard pages by the guard
 195          * mode zone allocator).
 196          */
 197         vm_mem_bootstrap_log("vm_page_module_init");
 198         vm_page_module_init();
 199
 200         vm_mem_bootstrap_log("kalloc_init");
 201         kalloc_init();
 202
 203         vm_mem_bootstrap_log("vm_fault_init");
 204         vm_fault_init();
 205
 206         vm_mem_bootstrap_log("memory_manager_default_init");
 207         memory_manager_default_init();
 208
 209         vm_mem_bootstrap_log("memory_object_control_bootstrap");
 210         memory_object_control_bootstrap();
 211
 212         vm_mem_bootstrap_log("device_pager_bootstrap");
 213         device_pager_bootstrap();
 214
 215         vm_paging_map_init();
 216
 217         vm_mem_bootstrap_log("vm_mem_bootstrap done");
 218 }
 219
 220 void
 221 vm_mem_init(void)
 222 {
 223         vm_object_init();
 224 }