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