osfmk/vm/vm_init.c

   1 /*
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  28 /*
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  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 <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 #if CONFIG_EMBEDDED
 101 extern int log_executable_mem_entry;
 102 #endif /* CONFIG_EMBEDDED */
 103
 104 static inline void
 105 vm_mem_bootstrap_log(const char *message)
 106 {
 107 //      kprintf("vm_mem_bootstrap: %s\n", message);
 108         kernel_debug_string_early(message);
 109 }
 110
 111 /*
 112  *      vm_mem_bootstrap initializes the virtual memory system.
 113  *      This is done only by the first cpu up.
 114  */
 115
 116 void
 117 vm_mem_bootstrap(void)
 118 {
 119         vm_offset_t     start, end;
 120         vm_size_t zsizearg;
 121         mach_vm_size_t zsize;
 122
 123         /*
 124          *      Initializes resident memory structures.
 125          *      From here on, all physical memory is accounted for,
 126          *      and we use only virtual addresses.
 127          */
 128         vm_mem_bootstrap_log("vm_page_bootstrap");
 129         vm_page_bootstrap(&start, &end);
 130
 131         /*
 132          *      Initialize other VM packages
 133          */
 134
 135         vm_mem_bootstrap_log("zone_bootstrap");
 136         zone_bootstrap();
 137
 138         vm_mem_bootstrap_log("vm_object_bootstrap");
 139         vm_object_bootstrap();
 140
 141         vm_kernel_ready = TRUE;
 142
 143         vm_mem_bootstrap_log("vm_map_init");
 144         vm_map_init();
 145
 146         vm_mem_bootstrap_log("kmem_init");
 147         kmem_init(start, end);
 148         kmem_ready = TRUE;
 149         /*
 150          * Eat a random amount of kernel_map to fuzz subsequent heap, zone and
 151          * stack addresses. (With a 4K page and 9 bits of randomness, this
 152          * eats at most 2M of VA from the map.)
 153          */
 154         if (!PE_parse_boot_argn("kmapoff", &kmapoff_pgcnt,
 155             sizeof(kmapoff_pgcnt))) {
 156                 kmapoff_pgcnt = early_random() & 0x1ff; /* 9 bits */
 157         }
 158         if (kmapoff_pgcnt > 0 &&
 159             vm_allocate_kernel(kernel_map, &kmapoff_kaddr,
 160             kmapoff_pgcnt * PAGE_SIZE_64, VM_FLAGS_ANYWHERE, VM_KERN_MEMORY_OSFMK) != KERN_SUCCESS) {
 161                 panic("cannot vm_allocate %u kernel_map pages", kmapoff_pgcnt);
 162         }
 163
 164 #if CONFIG_EMBEDDED
 165         PE_parse_boot_argn("log_executable_mem_entry",
 166             &log_executable_mem_entry,
 167             sizeof(log_executable_mem_entry));
 168 #endif /* CONFIG_EMBEDDED */
 169
 170         vm_mem_bootstrap_log("pmap_init");
 171         pmap_init();
 172
 173         kmem_alloc_ready = TRUE;
 174
 175         if (PE_parse_boot_argn("zsize", &zsizearg, sizeof(zsizearg))) {
 176                 zsize = zsizearg * (1024ULL * 1024);
 177         } else {
 178                 zsize = sane_size >> 2;         /* Set target zone size as 1/4 of physical memory */
 179 #if defined(__LP64__)
 180                 zsize += zsize >> 1;
 181 #endif /* __LP64__ */
 182
 183 #if defined(__x86_64__)
 184                 /*
 185                  * The max_zonemap_size was based on physical memory and might make the
 186                  * end of the zone go beyond what vm_page_[un]pack_ptr() can handle.
 187                  * To fix that we'll limit the size of the zone map to be what a 256Gig
 188                  * machine would have, but we'll retain the boot-args-specified size if
 189                  * it was provided.
 190                  */
 191                 vm_size_t       orig_zsize = zsize;
 192
 193                 if (zsize > 256 * (1024ULL * 1024 * 1024) / 4) {
 194                         zsize = 256 * (1024ULL * 1024 * 1024) / 4;
 195                         printf("NOTE: zonemap size reduced from 0x%lx to 0x%lx\n",
 196                             (uintptr_t)orig_zsize, (uintptr_t)zsize);
 197                 }
 198 #endif
 199         }
 200
 201         if (zsize < ZONE_MAP_MIN) {
 202                 zsize = ZONE_MAP_MIN;   /* Clamp to min */
 203         }
 204         if (zsize > sane_size >> 1) {
 205                 zsize = sane_size >> 1; /* Clamp to half of RAM max */
 206         }
 207 #if !__LP64__
 208         if (zsize > ZONE_MAP_MAX) {
 209                 zsize = ZONE_MAP_MAX;   /* Clamp to 1.5GB max for K32 */
 210         }
 211 #endif /* !__LP64__ */
 212
 213         vm_mem_bootstrap_log("kext_alloc_init");
 214         kext_alloc_init();
 215
 216         vm_mem_bootstrap_log("zone_init");
 217         assert((vm_size_t) zsize == zsize);
 218         zone_init((vm_size_t) zsize);   /* Allocate address space for zones */
 219
 220         /* The vm_page_zone must be created prior to kalloc_init; that
 221          * routine can trigger zalloc()s (for e.g. mutex statistic structure
 222          * initialization). The vm_page_zone must exist to saisfy fictitious
 223          * page allocations (which are used for guard pages by the guard
 224          * mode zone allocator).
 225          */
 226         vm_mem_bootstrap_log("vm_page_module_init");
 227         vm_page_module_init();
 228
 229         vm_mem_bootstrap_log("kalloc_init");
 230         kalloc_init();
 231
 232         vm_mem_bootstrap_log("vm_fault_init");
 233         vm_fault_init();
 234
 235         vm_mem_bootstrap_log("memory_manager_default_init");
 236         memory_manager_default_init();
 237
 238         vm_mem_bootstrap_log("memory_object_control_bootstrap");
 239         memory_object_control_bootstrap();
 240
 241         vm_mem_bootstrap_log("device_pager_bootstrap");
 242         device_pager_bootstrap();
 243
 244         vm_paging_map_init();
 245
 246         vm_mem_bootstrap_log("vm_mem_bootstrap done");
 247
 248 #ifdef  CONFIG_ZCACHE
 249         zcache_bootstrap();
 250 #endif
 251         vm_rtfault_record_init();
 252 }
 253
 254 void
 255 vm_mem_init(void)
 256 {
 257         vm_object_init();
 258 }