osfmk/kern/startup.c

   1 /*
   2  * Copyright (c) 2000-2009 Apple Inc. All rights reserved.
   3  *
   4  * @APPLE_OSREFERENCE_LICENSE_HEADER_START@
   5  *
   6  * This file contains Original Code and/or Modifications of Original Code
   7  * as defined in and that are subject to the Apple Public Source License
   8  * Version 2.0 (the 'License'). You may not use this file except in
   9  * compliance with the License. The rights granted to you under the License
  10  * may not be used to create, or enable the creation or redistribution of,
  11  * unlawful or unlicensed copies of an Apple operating system, or to
  12  * circumvent, violate, or enable the circumvention or violation of, any
  13  * terms of an Apple operating system software license agreement.
  14  *
  15  * Please obtain a copy of the License at
  16  * http://www.opensource.apple.com/apsl/ and read it before using this file.
  17  *
  18  * The Original Code and all software distributed under the License are
  19  * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
  20  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
  21  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
  22  * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
  23  * Please see the License for the specific language governing rights and
  24  * limitations under the License.
  25  *
  26  * @APPLE_OSREFERENCE_LICENSE_HEADER_END@
  27  */
  28 /*
  29  * @OSF_COPYRIGHT@
  30  */
  31 /*
  32  * Mach Operating System
  33  * Copyright (c) 1991,1990,1989,1988 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  * NOTICE: This file was modified by McAfee Research in 2004 to introduce
  58  * support for mandatory and extensible security protections.  This notice
  59  * is included in support of clause 2.2 (b) of the Apple Public License,
  60  * Version 2.0.
  61  */
  62 /*
  63  */
  64
  65 /*
  66  *      Mach kernel startup.
  67  */
  68
  69 #include <debug.h>
  70 #include <xpr_debug.h>
  71 #include <mach_kdp.h>
  72
  73 #include <mach/boolean.h>
  74 #include <mach/machine.h>
  75 #include <mach/thread_act.h>
  76 #include <mach/task_special_ports.h>
  77 #include <mach/vm_param.h>
  78 #include <ipc/ipc_init.h>
  79 #include <kern/assert.h>
  80 #include <kern/mach_param.h>
  81 #include <kern/misc_protos.h>
  82 #include <kern/clock.h>
  83 #include <kern/cpu_number.h>
  84 #include <kern/ledger.h>
  85 #include <kern/machine.h>
  86 #include <kern/processor.h>
  87 #include <kern/sched_prim.h>
  88 #include <kern/startup.h>
  89 #include <kern/task.h>
  90 #include <kern/thread.h>
  91 #include <kern/timer.h>
  92 #include <kern/wait_queue.h>
  93 #include <kern/xpr.h>
  94 #include <kern/zalloc.h>
  95 #include <kern/locks.h>
  96 #include <console/serial_protos.h>
  97 #include <vm/vm_kern.h>
  98 #include <vm/vm_init.h>
  99 #include <vm/vm_map.h>
 100 #include <vm/vm_object.h>
 101 #include <vm/vm_page.h>
 102 #include <vm/vm_pageout.h>
 103 #include <vm/vm_shared_region.h>
 104 #include <machine/pmap.h>
 105 #include <machine/commpage.h>
 106 #include <libkern/version.h>
 107 #include <sys/kdebug.h>
 108
 109 #if MACH_KDP
 110 #include <kdp/kdp.h>
 111 #endif
 112
 113 #if CONFIG_MACF
 114 #include <security/mac_mach_internal.h>
 115 #endif
 116
 117 #if CONFIG_COUNTERS
 118 #include <pmc/pmc.h>
 119 #endif
 120
 121 static void             kernel_bootstrap_thread(void);
 122
 123 static void             load_context(
 124                                         thread_t        thread);
 125 #if (defined(__i386__) || defined(__x86_64__)) && NCOPY_WINDOWS > 0
 126 extern void cpu_userwindow_init(int);
 127 extern void cpu_physwindow_init(int);
 128 #endif
 129
 130 // libkern/OSKextLib.cpp
 131 extern void     OSKextRemoveKextBootstrap(void);
 132
 133 void scale_setup(void);
 134 extern void bsd_scale_setup(int);
 135 extern unsigned int semaphore_max;
 136
 137 /*
 138  *      Running in virtual memory, on the interrupt stack.
 139  */
 140
 141 extern int serverperfmode;
 142
 143 /* size of kernel trace buffer, disabled by default */
 144 unsigned int new_nkdbufs = 0;
 145
 146 /* mach leak logging */
 147 int log_leaks = 0;
 148 int turn_on_log_leaks = 0;
 149
 150
 151 void
 152 kernel_early_bootstrap(void)
 153 {
 154
 155         lck_mod_init();
 156
 157         /*
 158          * Initialize the timer callout world
 159          */
 160         timer_call_initialize();
 161 }
 162
 163
 164 void
 165 kernel_bootstrap(void)
 166 {
 167         kern_return_t   result;
 168         thread_t        thread;
 169         char            namep[16];
 170
 171         printf("%s\n", version); /* log kernel version */
 172
 173 #define kernel_bootstrap_kprintf(x...) /* kprintf("kernel_bootstrap: " x) */
 174
 175         if (PE_parse_boot_argn("-l", namep, sizeof (namep))) /* leaks logging */
 176                 turn_on_log_leaks = 1;
 177
 178         PE_parse_boot_argn("trace", &new_nkdbufs, sizeof (new_nkdbufs));
 179
 180         /* i386_vm_init already checks for this ; do it aagin anyway */
 181         if (PE_parse_boot_argn("serverperfmode", &serverperfmode, sizeof (serverperfmode))) {
 182                 serverperfmode = 1;
 183         }
 184         scale_setup();
 185
 186         kernel_bootstrap_kprintf("calling vm_mem_bootstrap\n");
 187         vm_mem_bootstrap();
 188
 189         kernel_bootstrap_kprintf("calling vm_mem_init\n");
 190         vm_mem_init();
 191
 192         machine_info.memory_size = (uint32_t)mem_size;
 193         machine_info.max_mem = max_mem;
 194         machine_info.major_version = version_major;
 195         machine_info.minor_version = version_minor;
 196
 197         kernel_bootstrap_kprintf("calling sched_init\n");
 198         sched_init();
 199
 200         kernel_bootstrap_kprintf("calling wait_queue_bootstrap\n");
 201         wait_queue_bootstrap();
 202
 203         kernel_bootstrap_kprintf("calling ipc_bootstrap\n");
 204         ipc_bootstrap();
 205
 206 #if CONFIG_MACF
 207         mac_policy_init();
 208 #endif
 209         kernel_bootstrap_kprintf("calling ipc_init\n");
 210         ipc_init();
 211
 212         /*
 213          * As soon as the virtual memory system is up, we record
 214          * that this CPU is using the kernel pmap.
 215          */
 216         kernel_bootstrap_kprintf("calling PMAP_ACTIVATE_KERNEL\n");
 217         PMAP_ACTIVATE_KERNEL(master_cpu);
 218
 219         kernel_bootstrap_kprintf("calling mapping_free_prime\n");
 220         mapping_free_prime();                                           /* Load up with temporary mapping blocks */
 221
 222         kernel_bootstrap_kprintf("calling machine_init\n");
 223         machine_init();
 224
 225         kernel_bootstrap_kprintf("calling clock_init\n");
 226         clock_init();
 227
 228
 229         /*
 230          *      Initialize the IPC, task, and thread subsystems.
 231          */
 232         kernel_bootstrap_kprintf("calling ledger_init\n");
 233         ledger_init();
 234
 235         kernel_bootstrap_kprintf("calling task_init\n");
 236         task_init();
 237
 238         kernel_bootstrap_kprintf("calling thread_init\n");
 239         thread_init();
 240
 241         /*
 242          *      Create a kernel thread to execute the kernel bootstrap.
 243          */
 244         kernel_bootstrap_kprintf("calling kernel_thread_create\n");
 245         result = kernel_thread_create((thread_continue_t)kernel_bootstrap_thread, NULL, MAXPRI_KERNEL, &thread);
 246
 247         if (result != KERN_SUCCESS) panic("kernel_bootstrap: result = %08X\n", result);
 248
 249         thread->state = TH_RUN;
 250         thread_deallocate(thread);
 251
 252         /* transfer statistics from init thread to kernel */
 253         thread_t init_thread = current_thread();
 254         kernel_task->tkm_private.alloc = init_thread->tkm_private.alloc;
 255         kernel_task->tkm_private.free = init_thread->tkm_private.free;
 256         kernel_task->tkm_shared.alloc = init_thread->tkm_shared.alloc;
 257         kernel_task->tkm_shared.free = init_thread->tkm_shared.free;
 258
 259         kernel_bootstrap_kprintf("calling load_context - done\n");
 260         load_context(thread);
 261         /*NOTREACHED*/
 262 }
 263
 264 int kth_started = 0;
 265
 266 /*
 267  * Now running in a thread.  Kick off other services,
 268  * invoke user bootstrap, enter pageout loop.
 269  */
 270 static void
 271 kernel_bootstrap_thread(void)
 272 {
 273         processor_t             processor = current_processor();
 274
 275 #define kernel_bootstrap_thread_kprintf(x...) /* kprintf("kernel_bootstrap_thread: " x) */
 276         kernel_bootstrap_thread_kprintf("calling idle_thread_create\n");
 277         /*
 278          * Create the idle processor thread.
 279          */
 280         idle_thread_create(processor);
 281
 282         /*
 283          * N.B. Do not stick anything else
 284          * before this point.
 285          *
 286          * Start up the scheduler services.
 287          */
 288         kernel_bootstrap_thread_kprintf("calling sched_startup\n");
 289         sched_startup();
 290
 291         /*
 292          * Thread lifecycle maintenance (teardown, stack allocation)
 293          */
 294         kernel_bootstrap_thread_kprintf("calling thread_daemon_init\n");
 295         thread_daemon_init();
 296
 297         /*
 298          * Thread callout service.
 299          */
 300         kernel_bootstrap_thread_kprintf("calling thread_call_initialize\n");
 301         thread_call_initialize();
 302
 303         /*
 304          * Remain on current processor as
 305          * additional processors come online.
 306          */
 307         kernel_bootstrap_thread_kprintf("calling thread_bind\n");
 308         thread_bind(processor);
 309
 310         /*
 311          * Kick off memory mapping adjustments.
 312          */
 313         kernel_bootstrap_thread_kprintf("calling mapping_adjust\n");
 314         mapping_adjust();
 315
 316         /*
 317          *      Create the clock service.
 318          */
 319         kernel_bootstrap_thread_kprintf("calling clock_service_create\n");
 320         clock_service_create();
 321
 322         /*
 323          *      Create the device service.
 324          */
 325         device_service_create();
 326
 327         kth_started = 1;
 328
 329 #if (defined(__i386__) || defined(__x86_64__)) && NCOPY_WINDOWS > 0
 330         /*
 331          * Create and initialize the physical copy window for processor 0
 332          * This is required before starting kicking off  IOKit.
 333          */
 334         cpu_physwindow_init(0);
 335 #endif
 336
 337         vm_kernel_reserved_entry_init();
 338
 339 #if MACH_KDP
 340         kernel_bootstrap_kprintf("calling kdp_init\n");
 341         kdp_init();
 342 #endif
 343
 344 #if CONFIG_COUNTERS
 345         pmc_bootstrap();
 346 #endif
 347
 348 #if (defined(__i386__) || defined(__x86_64__))
 349         if (turn_on_log_leaks && !new_nkdbufs)
 350                 new_nkdbufs = 200000;
 351         start_kern_tracing(new_nkdbufs);
 352         if (turn_on_log_leaks)
 353                 log_leaks = 1;
 354 #endif
 355
 356 #ifdef  IOKIT
 357         PE_init_iokit();
 358 #endif
 359
 360         (void) spllo();         /* Allow interruptions */
 361
 362 #if (defined(__i386__) || defined(__x86_64__)) && NCOPY_WINDOWS > 0
 363         /*
 364          * Create and initialize the copy window for processor 0
 365          * This also allocates window space for all other processors.
 366          * However, this is dependent on the number of processors - so this call
 367          * must be after IOKit has been started because IOKit performs processor
 368          * discovery.
 369          */
 370         cpu_userwindow_init(0);
 371 #endif
 372
 373 #if (!defined(__i386__) && !defined(__x86_64__))
 374         if (turn_on_log_leaks && !new_nkdbufs)
 375                 new_nkdbufs = 200000;
 376         start_kern_tracing(new_nkdbufs);
 377         if (turn_on_log_leaks)
 378                 log_leaks = 1;
 379 #endif
 380
 381         /*
 382          *      Initialize the shared region module.
 383          */
 384         vm_shared_region_init();
 385         vm_commpage_init();
 386
 387 #if CONFIG_MACF
 388         mac_policy_initmach();
 389 #endif
 390
 391         /*
 392          *      Start the user bootstrap.
 393          */
 394 #ifdef  MACH_BSD
 395         bsd_init();
 396 #endif
 397
 398     /*
 399      * Get rid of segments used to bootstrap kext loading. This removes
 400      * the KLD, PRELINK symtab, LINKEDIT, and symtab segments/load commands.
 401      */
 402         OSKextRemoveKextBootstrap();
 403
 404         serial_keyboard_init();         /* Start serial keyboard if wanted */
 405
 406         vm_page_init_local_q();
 407
 408         thread_bind(PROCESSOR_NULL);
 409
 410         /*
 411          *      Become the pageout daemon.
 412          */
 413         vm_pageout();
 414         /*NOTREACHED*/
 415 }
 416
 417 /*
 418  *      slave_main:
 419  *
 420  *      Load the first thread to start a processor.
 421  */
 422 void
 423 slave_main(void *machine_param)
 424 {
 425         processor_t             processor = current_processor();
 426         thread_t                thread;
 427
 428         /*
 429          *      Use the idle processor thread if there
 430          *      is no dedicated start up thread.
 431          */
 432         if (processor->next_thread == THREAD_NULL) {
 433                 thread = processor->idle_thread;
 434                 thread->continuation = (thread_continue_t)processor_start_thread;
 435                 thread->parameter = machine_param;
 436         }
 437         else {
 438                 thread = processor->next_thread;
 439                 processor->next_thread = THREAD_NULL;
 440         }
 441
 442         load_context(thread);
 443         /*NOTREACHED*/
 444 }
 445
 446 /*
 447  *      processor_start_thread:
 448  *
 449  *      First thread to execute on a started processor.
 450  *
 451  *      Called at splsched.
 452  */
 453 void
 454 processor_start_thread(void *machine_param)
 455 {
 456         processor_t             processor = current_processor();
 457         thread_t                self = current_thread();
 458
 459         slave_machine_init(machine_param);
 460
 461         /*
 462          *      If running the idle processor thread,
 463          *      reenter the idle loop, else terminate.
 464          */
 465         if (self == processor->idle_thread)
 466                 thread_block((thread_continue_t)idle_thread);
 467
 468         thread_terminate(self);
 469         /*NOTREACHED*/
 470 }
 471
 472 /*
 473  *      load_context:
 474  *
 475  *      Start the first thread on a processor.
 476  */
 477 static void
 478 load_context(
 479         thread_t                thread)
 480 {
 481         processor_t             processor = current_processor();
 482
 483
 484 #define load_context_kprintf(x...) /* kprintf("load_context: " x) */
 485
 486         load_context_kprintf("calling machine_set_current_thread\n");
 487         machine_set_current_thread(thread);
 488
 489         load_context_kprintf("calling processor_up\n");
 490         processor_up(processor);
 491
 492         PMAP_ACTIVATE_KERNEL(processor->cpu_id);
 493
 494         /*
 495          * Acquire a stack if none attached.  The panic
 496          * should never occur since the thread is expected
 497          * to have reserved stack.
 498          */
 499         load_context_kprintf("stack %x, stackptr %x\n",
 500                              thread->kernel_stack, thread->machine.kstackptr);
 501         if (!thread->kernel_stack) {
 502                 load_context_kprintf("calling stack_alloc_try\n");
 503                 if (!stack_alloc_try(thread))
 504                         panic("load_context");
 505         }
 506
 507         /*
 508          * The idle processor threads are not counted as
 509          * running for load calculations.
 510          */
 511         if (!(thread->state & TH_IDLE))
 512                 sched_run_incr();
 513
 514         processor->active_thread = thread;
 515         processor->current_pri = thread->sched_pri;
 516         processor->current_thmode = thread->sched_mode;
 517         processor->deadline = UINT64_MAX;
 518         thread->last_processor = processor;
 519
 520         processor->last_dispatch = mach_absolute_time();
 521         timer_start(&thread->system_timer, processor->last_dispatch);
 522         PROCESSOR_DATA(processor, thread_timer) = PROCESSOR_DATA(processor, kernel_timer) = &thread->system_timer;
 523
 524         timer_start(&PROCESSOR_DATA(processor, system_state), processor->last_dispatch);
 525         PROCESSOR_DATA(processor, current_state) = &PROCESSOR_DATA(processor, system_state);
 526
 527         PMAP_ACTIVATE_USER(thread, processor->cpu_id);
 528
 529         load_context_kprintf("calling machine_load_context\n");
 530         machine_load_context(thread);
 531         /*NOTREACHED*/
 532 }
 533
 534 void
 535 scale_setup()
 536 {
 537         int scale = 0;
 538 #if defined(__LP64__)
 539         typeof(task_max) task_max_base = task_max;
 540
 541         /* Raise limits for servers with >= 16G */
 542         if ((serverperfmode != 0) && ((uint64_t)sane_size >= (uint64_t)(16 * 1024 * 1024 *1024ULL))) {
 543                 scale = (int)((uint64_t)sane_size / (uint64_t)(8 * 1024 * 1024 *1024ULL));
 544                 /* limit to 128 G */
 545                 if (scale > 16)
 546                         scale = 16;
 547                 task_max_base = 2500;
 548         } else if ((uint64_t)sane_size >= (uint64_t)(3 * 1024 * 1024 *1024ULL))
 549                 scale = 2;
 550
 551         task_max = MAX(task_max, task_max_base * scale);
 552
 553         if (scale != 0) {
 554                 task_threadmax = task_max;
 555                 thread_max = task_max * 5;
 556         }
 557
 558 #endif
 559
 560         bsd_scale_setup(scale);
 561
 562         ipc_space_max = SPACE_MAX;
 563         ipc_tree_entry_max = ITE_MAX;
 564         ipc_port_max = PORT_MAX;
 565         ipc_pset_max = SET_MAX;
 566         semaphore_max = SEMAPHORE_MAX;
 567 }
 568