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 #include <norma_vm.h>
  73
  74 #include <mach/boolean.h>
  75 #include <mach/machine.h>
  76 #include <mach/thread_act.h>
  77 #include <mach/task_special_ports.h>
  78 #include <mach/vm_param.h>
  79 #include <ipc/ipc_init.h>
  80 #include <kern/assert.h>
  81 #include <kern/mach_param.h>
  82 #include <kern/misc_protos.h>
  83 #include <kern/clock.h>
  84 #include <kern/cpu_number.h>
  85 #include <kern/ledger.h>
  86 #include <kern/machine.h>
  87 #include <kern/processor.h>
  88 #include <kern/sched_prim.h>
  89 #include <kern/startup.h>
  90 #include <kern/task.h>
  91 #include <kern/thread.h>
  92 #include <kern/timer.h>
  93 #include <kern/wait_queue.h>
  94 #include <kern/xpr.h>
  95 #include <kern/zalloc.h>
  96 #include <kern/locks.h>
  97 #include <console/serial_protos.h>
  98 #include <vm/vm_kern.h>
  99 #include <vm/vm_init.h>
 100 #include <vm/vm_map.h>
 101 #include <vm/vm_object.h>
 102 #include <vm/vm_page.h>
 103 #include <vm/vm_pageout.h>
 104 #include <vm/vm_shared_region.h>
 105 #include <machine/pmap.h>
 106 #include <machine/commpage.h>
 107 #include <libkern/version.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 #ifdef __ppc__
 122 #include <ppc/Firmware.h>
 123 #include <ppc/mappings.h>
 124 #endif
 125
 126 static void             kernel_bootstrap_thread(void);
 127
 128 static void             load_context(
 129                                         thread_t        thread);
 130 #if (defined(__i386__) || defined(__x86_64__)) && NCOPY_WINDOWS > 0
 131 extern void cpu_userwindow_init(int);
 132 extern void cpu_physwindow_init(int);
 133 #endif
 134
 135 // libkern/OSKextLib.cpp
 136 extern void     OSKextRemoveKextBootstrap(void);
 137
 138 void srv_setup(void);
 139 extern void bsd_srv_setup(int);
 140 extern unsigned int semaphore_max;
 141
 142
 143 /*
 144  *      Running in virtual memory, on the interrupt stack.
 145  */
 146
 147 extern int srv;
 148
 149 void
 150 kernel_bootstrap(void)
 151 {
 152         kern_return_t   result;
 153         thread_t                thread;
 154
 155         printf("%s\n", version); /* log kernel version */
 156
 157 #define kernel_bootstrap_kprintf(x...) /* kprintf("kernel_bootstrap: " x) */
 158
 159         /* i386_vm_init already checks for this ; do it aagin anyway */
 160         if (PE_parse_boot_argn("srv", &srv, sizeof (srv))) {
 161                 srv = 1;
 162         }
 163
 164         srv_setup();
 165
 166         kernel_bootstrap_kprintf("calling lck_mod_init\n");
 167         lck_mod_init();
 168
 169         kernel_bootstrap_kprintf("calling vm_mem_bootstrap\n");
 170         vm_mem_bootstrap();
 171
 172         kernel_bootstrap_kprintf("calling vm_mem_init\n");
 173         vm_mem_init();
 174
 175         machine_info.memory_size = (uint32_t)mem_size;
 176         machine_info.max_mem = max_mem;
 177         machine_info.major_version = version_major;
 178         machine_info.minor_version = version_minor;
 179
 180         kernel_bootstrap_kprintf("calling sched_init\n");
 181         sched_init();
 182
 183         kernel_bootstrap_kprintf("calling wait_queue_bootstrap\n");
 184         wait_queue_bootstrap();
 185
 186         kernel_bootstrap_kprintf("calling ipc_bootstrap\n");
 187         ipc_bootstrap();
 188
 189 #if CONFIG_MACF
 190         mac_policy_init();
 191 #endif
 192         kernel_bootstrap_kprintf("calling ipc_init\n");
 193         ipc_init();
 194
 195         /*
 196          * As soon as the virtual memory system is up, we record
 197          * that this CPU is using the kernel pmap.
 198          */
 199         kernel_bootstrap_kprintf("calling PMAP_ACTIVATE_KERNEL\n");
 200         PMAP_ACTIVATE_KERNEL(master_cpu);
 201
 202         kernel_bootstrap_kprintf("calling mapping_free_prime\n");
 203         mapping_free_prime();                                           /* Load up with temporary mapping blocks */
 204
 205         kernel_bootstrap_kprintf("calling machine_init\n");
 206         machine_init();
 207
 208         kernel_bootstrap_kprintf("calling clock_init\n");
 209         clock_init();
 210
 211
 212         /*
 213          *      Initialize the IPC, task, and thread subsystems.
 214          */
 215         kernel_bootstrap_kprintf("calling ledger_init\n");
 216         ledger_init();
 217
 218         kernel_bootstrap_kprintf("calling task_init\n");
 219         task_init();
 220
 221         kernel_bootstrap_kprintf("calling thread_init\n");
 222         thread_init();
 223
 224         /*
 225          *      Create a kernel thread to execute the kernel bootstrap.
 226          */
 227         kernel_bootstrap_kprintf("calling kernel_thread_create\n");
 228         result = kernel_thread_create((thread_continue_t)kernel_bootstrap_thread, NULL, MAXPRI_KERNEL, &thread);
 229
 230         if (result != KERN_SUCCESS) panic("kernel_bootstrap: result = %08X\n", result);
 231
 232         thread->state = TH_RUN;
 233         thread_deallocate(thread);
 234
 235         kernel_bootstrap_kprintf("calling load_context - done\n");
 236         load_context(thread);
 237         /*NOTREACHED*/
 238 }
 239
 240 int kth_started = 0;
 241
 242 /*
 243  * Now running in a thread.  Kick off other services,
 244  * invoke user bootstrap, enter pageout loop.
 245  */
 246 static void
 247 kernel_bootstrap_thread(void)
 248 {
 249         processor_t             processor = current_processor();
 250
 251 #define kernel_bootstrap_thread_kprintf(x...) /* kprintf("kernel_bootstrap_thread: " x) */
 252         kernel_bootstrap_thread_kprintf("calling idle_thread_create\n");
 253         /*
 254          * Create the idle processor thread.
 255          */
 256         idle_thread_create(processor);
 257
 258         /*
 259          * N.B. Do not stick anything else
 260          * before this point.
 261          *
 262          * Start up the scheduler services.
 263          */
 264         kernel_bootstrap_thread_kprintf("calling sched_startup\n");
 265         sched_startup();
 266
 267         /*
 268          * Remain on current processor as
 269          * additional processors come online.
 270          */
 271         kernel_bootstrap_thread_kprintf("calling thread_bind\n");
 272         thread_bind(processor);
 273
 274         /*
 275          * Kick off memory mapping adjustments.
 276          */
 277         kernel_bootstrap_thread_kprintf("calling mapping_adjust\n");
 278         mapping_adjust();
 279
 280         /*
 281          *      Create the clock service.
 282          */
 283         kernel_bootstrap_thread_kprintf("calling clock_service_create\n");
 284         clock_service_create();
 285
 286         /*
 287          *      Create the device service.
 288          */
 289         device_service_create();
 290
 291         kth_started = 1;
 292
 293 #if MACH_KDP
 294         kernel_bootstrap_kprintf("calling kdp_init\n");
 295         kdp_init();
 296 #endif
 297
 298 #if (defined(__i386__) || defined(__x86_64__)) && NCOPY_WINDOWS > 0
 299         /*
 300          * Create and initialize the physical copy window for processor 0
 301          * This is required before starting kicking off  IOKit.
 302          */
 303         cpu_physwindow_init(0);
 304 #endif
 305
 306 #if CONFIG_COUNTERS
 307         pmc_bootstrap();
 308 #endif
 309
 310 #ifdef  IOKIT
 311         PE_init_iokit();
 312 #endif
 313
 314         (void) spllo();         /* Allow interruptions */
 315
 316 #if (defined(__i386__) || defined(__x86_64__)) && NCOPY_WINDOWS > 0
 317         /*
 318          * Create and initialize the copy window for processor 0
 319          * This also allocates window space for all other processors.
 320          * However, this is dependent on the number of processors - so this call
 321          * must be after IOKit has been started because IOKit performs processor
 322          * discovery.
 323          */
 324         cpu_userwindow_init(0);
 325 #endif
 326
 327         /*
 328          *      Initialize the shared region module.
 329          */
 330         vm_shared_region_init();
 331         vm_commpage_init();
 332
 333 #if CONFIG_MACF
 334         mac_policy_initmach();
 335 #endif
 336
 337         /*
 338          *      Start the user bootstrap.
 339          */
 340 #ifdef  MACH_BSD
 341         bsd_init();
 342 #endif
 343
 344     /*
 345      * Get rid of segments used to bootstrap kext loading. This removes
 346      * the KLD, PRELINK symtab, LINKEDIT, and symtab segments/load commands.
 347      */
 348         OSKextRemoveKextBootstrap();
 349
 350         serial_keyboard_init();         /* Start serial keyboard if wanted */
 351
 352         vm_page_init_local_q();
 353
 354         thread_bind(PROCESSOR_NULL);
 355
 356         /*
 357          *      Become the pageout daemon.
 358          */
 359         vm_pageout();
 360         /*NOTREACHED*/
 361 }
 362
 363 /*
 364  *      slave_main:
 365  *
 366  *      Load the first thread to start a processor.
 367  */
 368 void
 369 slave_main(void *machine_param)
 370 {
 371         processor_t             processor = current_processor();
 372         thread_t                thread;
 373
 374         /*
 375          *      Use the idle processor thread if there
 376          *      is no dedicated start up thread.
 377          */
 378         if (processor->next_thread == THREAD_NULL) {
 379                 thread = processor->idle_thread;
 380                 thread->continuation = (thread_continue_t)processor_start_thread;
 381                 thread->parameter = machine_param;
 382         }
 383         else {
 384                 thread = processor->next_thread;
 385                 processor->next_thread = THREAD_NULL;
 386         }
 387
 388         load_context(thread);
 389         /*NOTREACHED*/
 390 }
 391
 392 /*
 393  *      processor_start_thread:
 394  *
 395  *      First thread to execute on a started processor.
 396  *
 397  *      Called at splsched.
 398  */
 399 void
 400 processor_start_thread(void *machine_param)
 401 {
 402         processor_t             processor = current_processor();
 403         thread_t                self = current_thread();
 404
 405         slave_machine_init(machine_param);
 406
 407         /*
 408          *      If running the idle processor thread,
 409          *      reenter the idle loop, else terminate.
 410          */
 411         if (self == processor->idle_thread)
 412                 thread_block((thread_continue_t)idle_thread);
 413
 414         thread_terminate(self);
 415         /*NOTREACHED*/
 416 }
 417
 418 /*
 419  *      load_context:
 420  *
 421  *      Start the first thread on a processor.
 422  */
 423 static void
 424 load_context(
 425         thread_t                thread)
 426 {
 427         processor_t             processor = current_processor();
 428
 429
 430 #define load_context_kprintf(x...) /* kprintf("load_context: " x) */
 431
 432         load_context_kprintf("calling machine_set_current_thread\n");
 433         machine_set_current_thread(thread);
 434
 435         load_context_kprintf("calling processor_up\n");
 436         processor_up(processor);
 437
 438         PMAP_ACTIVATE_KERNEL(processor->cpu_id);
 439
 440         /*
 441          * Acquire a stack if none attached.  The panic
 442          * should never occur since the thread is expected
 443          * to have reserved stack.
 444          */
 445         load_context_kprintf("stack %x, stackptr %x\n",
 446                              thread->kernel_stack, thread->machine.kstackptr);
 447         if (!thread->kernel_stack) {
 448                 load_context_kprintf("calling stack_alloc_try\n");
 449                 if (!stack_alloc_try(thread))
 450                         panic("load_context");
 451         }
 452
 453         /*
 454          * The idle processor threads are not counted as
 455          * running for load calculations.
 456          */
 457         if (!(thread->state & TH_IDLE))
 458                 sched_run_incr();
 459
 460         processor->active_thread = thread;
 461         processor->current_pri = thread->sched_pri;
 462         processor->deadline = UINT64_MAX;
 463         thread->last_processor = processor;
 464
 465         processor->last_dispatch = mach_absolute_time();
 466         timer_start(&thread->system_timer, processor->last_dispatch);
 467         PROCESSOR_DATA(processor, thread_timer) = PROCESSOR_DATA(processor, kernel_timer) = &thread->system_timer;
 468
 469         timer_start(&PROCESSOR_DATA(processor, system_state), processor->last_dispatch);
 470         PROCESSOR_DATA(processor, current_state) = &PROCESSOR_DATA(processor, system_state);
 471
 472         PMAP_ACTIVATE_USER(thread, processor->cpu_id);
 473
 474         load_context_kprintf("calling machine_load_context\n");
 475         machine_load_context(thread);
 476         /*NOTREACHED*/
 477 }
 478
 479 void
 480 srv_setup()
 481 {
 482         int scale = 0;
 483 #if defined(__LP64__)
 484         /* if memory is more than 16G, then apply rules for processes */
 485         if ((srv != 0) && ((uint64_t)sane_size >= (uint64_t)(16 * 1024 * 1024 *1024ULL))) {
 486                 scale = (int)((uint64_t)sane_size / (uint64_t)(8 * 1024 * 1024 *1024ULL));
 487                 /* limit to 128 G */
 488                 if (scale > 16)
 489                         scale = 16;
 490                 task_max = 2500 * scale;
 491                 task_threadmax = task_max;
 492                 thread_max = task_max * 5;
 493         } else
 494                 scale = 0;
 495 #endif
 496         bsd_srv_setup(scale);
 497
 498         ipc_space_max = SPACE_MAX;
 499         ipc_tree_entry_max = ITE_MAX;
 500         ipc_port_max = PORT_MAX;
 501         ipc_pset_max = SET_MAX;
 502         semaphore_max = SEMAPHORE_MAX;
 503 }
 504