osfmk/kern/startup.c

   1 /*
   2  * Copyright (c) 2000-2008 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/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/xpr.h>
  93 #include <kern/zalloc.h>
  94 #include <kern/locks.h>
  95 #include <console/serial_protos.h>
  96 #include <vm/vm_kern.h>
  97 #include <vm/vm_init.h>
  98 #include <vm/vm_map.h>
  99 #include <vm/vm_object.h>
 100 #include <vm/vm_page.h>
 101 #include <vm/vm_pageout.h>
 102 #include <vm/vm_shared_region.h>
 103 #include <machine/pmap.h>
 104 #include <machine/commpage.h>
 105 #include <libkern/version.h>
 106
 107 #if MACH_KDP
 108 #include <kdp/kdp.h>
 109 #endif
 110
 111 #if CONFIG_MACF
 112 #include <security/mac_mach_internal.h>
 113 #endif
 114
 115 #ifdef __ppc__
 116 #include <ppc/Firmware.h>
 117 #include <ppc/mappings.h>
 118 #endif
 119
 120 static void             kernel_bootstrap_thread(void);
 121
 122 static void             load_context(
 123                                         thread_t        thread);
 124 #ifdef i386
 125 extern void cpu_userwindow_init(int);
 126 extern void cpu_physwindow_init(int);
 127 #endif
 128
 129 #ifdef CONFIG_JETTISON_KERNEL_LINKER
 130 extern void     jettison_kernel_linker(void);
 131 #endif
 132
 133 /*
 134  *      Running in virtual memory, on the interrupt stack.
 135  */
 136
 137 void
 138 kernel_bootstrap(void)
 139 {
 140         kern_return_t   result;
 141         thread_t                thread;
 142
 143         printf("%s\n", version); /* log kernel version */
 144
 145 #define kernel_bootstrap_kprintf(x...) /* kprintf("kernel_bootstrap: " x) */
 146
 147         kernel_bootstrap_kprintf("calling lck_mod_init\n");
 148         lck_mod_init();
 149
 150         kernel_bootstrap_kprintf("calling sched_init\n");
 151         sched_init();
 152
 153         kernel_bootstrap_kprintf("calling vm_mem_bootstrap\n");
 154         vm_mem_bootstrap();
 155
 156         kernel_bootstrap_kprintf("calling ipc_bootstrap\n");
 157         ipc_bootstrap();
 158
 159         kernel_bootstrap_kprintf("calling vm_mem_init\n");
 160         vm_mem_init();
 161
 162         kernel_bootstrap_kprintf("calling kmod_init\n");
 163         kmod_init();
 164 #if CONFIG_MACF
 165         mac_policy_init();
 166 #endif
 167         kernel_bootstrap_kprintf("calling ipc_init\n");
 168         ipc_init();
 169
 170         /*
 171          * As soon as the virtual memory system is up, we record
 172          * that this CPU is using the kernel pmap.
 173          */
 174         kernel_bootstrap_kprintf("calling PMAP_ACTIVATE_KERNEL\n");
 175         PMAP_ACTIVATE_KERNEL(master_cpu);
 176
 177         kernel_bootstrap_kprintf("calling mapping_free_prime\n");
 178         mapping_free_prime();                                           /* Load up with temporary mapping blocks */
 179
 180         kernel_bootstrap_kprintf("calling machine_init\n");
 181         machine_init();
 182
 183         kernel_bootstrap_kprintf("calling clock_init\n");
 184         clock_init();
 185
 186         machine_info.memory_size = mem_size;
 187         machine_info.max_mem = max_mem;
 188         machine_info.major_version = version_major;
 189         machine_info.minor_version = version_minor;
 190
 191         /*
 192          *      Initialize the IPC, task, and thread subsystems.
 193          */
 194         kernel_bootstrap_kprintf("calling ledger_init\n");
 195         ledger_init();
 196
 197         kernel_bootstrap_kprintf("calling task_init\n");
 198         task_init();
 199
 200         kernel_bootstrap_kprintf("calling thread_init\n");
 201         thread_init();
 202
 203         /*
 204          *      Create a kernel thread to execute the kernel bootstrap.
 205          */
 206         kernel_bootstrap_kprintf("calling kernel_thread_create\n");
 207         result = kernel_thread_create((thread_continue_t)kernel_bootstrap_thread, NULL, MAXPRI_KERNEL, &thread);
 208
 209         if (result != KERN_SUCCESS) panic("kernel_bootstrap: result = %08X\n", result);
 210
 211         thread->state = TH_RUN;
 212         thread_deallocate(thread);
 213
 214         kernel_bootstrap_kprintf("calling load_context - done\n");
 215         load_context(thread);
 216         /*NOTREACHED*/
 217 }
 218
 219 int kth_started = 0;
 220
 221 /*
 222  * Now running in a thread.  Kick off other services,
 223  * invoke user bootstrap, enter pageout loop.
 224  */
 225 static void
 226 kernel_bootstrap_thread(void)
 227 {
 228         processor_t             processor = current_processor();
 229
 230 #define kernel_bootstrap_thread_kprintf(x...) /* kprintf("kernel_bootstrap_thread: " x) */
 231         kernel_bootstrap_thread_kprintf("calling idle_thread_create\n");
 232         /*
 233          * Create the idle processor thread.
 234          */
 235         idle_thread_create(processor);
 236
 237         /*
 238          * N.B. Do not stick anything else
 239          * before this point.
 240          *
 241          * Start up the scheduler services.
 242          */
 243         kernel_bootstrap_thread_kprintf("calling sched_startup\n");
 244         sched_startup();
 245
 246         /*
 247          * Remain on current processor as
 248          * additional processors come online.
 249          */
 250         kernel_bootstrap_thread_kprintf("calling thread_bind\n");
 251         thread_bind(processor);
 252
 253         /*
 254          * Kick off memory mapping adjustments.
 255          */
 256         kernel_bootstrap_thread_kprintf("calling mapping_adjust\n");
 257         mapping_adjust();
 258
 259         /*
 260          *      Create the clock service.
 261          */
 262         kernel_bootstrap_thread_kprintf("calling clock_service_create\n");
 263         clock_service_create();
 264
 265         /*
 266          *      Create the device service.
 267          */
 268         device_service_create();
 269
 270         kth_started = 1;
 271
 272 #if MACH_KDP
 273         kernel_bootstrap_kprintf("calling kdp_init\n");
 274         kdp_init();
 275 #endif
 276
 277 #ifdef i386
 278         /*
 279          * Create and initialize the physical copy window for processor 0
 280          * This is required before starting kicking off  IOKit.
 281          */
 282         cpu_physwindow_init(0);
 283 #endif
 284
 285 #ifdef  IOKIT
 286         PE_init_iokit();
 287 #endif
 288
 289         (void) spllo();         /* Allow interruptions */
 290
 291 #ifdef i386
 292         /*
 293          * Create and initialize the copy window for processor 0
 294          * This also allocates window space for all other processors.
 295          * However, this is dependent on the number of processors - so this call
 296          * must be after IOKit has been started because IOKit performs processor
 297          * discovery.
 298          */
 299         cpu_userwindow_init(0);
 300 #endif
 301
 302         /*
 303          *      Initialize the shared region module.
 304          */
 305         vm_shared_region_init();
 306         vm_commpage_init();
 307
 308 #if CONFIG_MACF
 309         mac_policy_initmach();
 310 #endif
 311
 312         /*
 313          *      Start the user bootstrap.
 314          */
 315 #ifdef  MACH_BSD
 316         bsd_init();
 317 #endif
 318
 319 #ifdef CONFIG_JETTISON_KERNEL_LINKER
 320         /* We do not run kextd, so get rid of the kernel linker now */
 321         jettison_kernel_linker();
 322 #endif
 323
 324         serial_keyboard_init();         /* Start serial keyboard if wanted */
 325
 326         thread_bind(PROCESSOR_NULL);
 327
 328         /*
 329          *      Become the pageout daemon.
 330          */
 331         vm_pageout();
 332         /*NOTREACHED*/
 333 }
 334
 335 /*
 336  *      slave_main:
 337  *
 338  *      Load the first thread to start a processor.
 339  */
 340 void
 341 slave_main(void *machine_param)
 342 {
 343         processor_t             processor = current_processor();
 344         thread_t                thread;
 345
 346         /*
 347          *      Use the idle processor thread if there
 348          *      is no dedicated start up thread.
 349          */
 350         if (processor->next_thread == THREAD_NULL) {
 351                 thread = processor->idle_thread;
 352                 thread->continuation = (thread_continue_t)processor_start_thread;
 353                 thread->parameter = machine_param;
 354         }
 355         else {
 356                 thread = processor->next_thread;
 357                 processor->next_thread = THREAD_NULL;
 358         }
 359
 360         load_context(thread);
 361         /*NOTREACHED*/
 362 }
 363
 364 /*
 365  *      processor_start_thread:
 366  *
 367  *      First thread to execute on a started processor.
 368  *
 369  *      Called at splsched.
 370  */
 371 void
 372 processor_start_thread(void *machine_param)
 373 {
 374         processor_t             processor = current_processor();
 375         thread_t                self = current_thread();
 376
 377         slave_machine_init(machine_param);
 378
 379         /*
 380          *      If running the idle processor thread,
 381          *      reenter the idle loop, else terminate.
 382          */
 383         if (self == processor->idle_thread)
 384                 thread_block((thread_continue_t)idle_thread);
 385
 386         thread_terminate(self);
 387         /*NOTREACHED*/
 388 }
 389
 390 /*
 391  *      load_context:
 392  *
 393  *      Start the first thread on a processor.
 394  */
 395 static void
 396 load_context(
 397         thread_t                thread)
 398 {
 399         processor_t             processor = current_processor();
 400
 401
 402 #define load_context_kprintf(x...) /* kprintf("load_context: " x) */
 403
 404         load_context_kprintf("calling machine_set_current_thread\n");
 405         machine_set_current_thread(thread);
 406
 407         load_context_kprintf("calling processor_up\n");
 408         processor_up(processor);
 409
 410         PMAP_ACTIVATE_KERNEL(PROCESSOR_DATA(processor, slot_num));
 411
 412         /*
 413          * Acquire a stack if none attached.  The panic
 414          * should never occur since the thread is expected
 415          * to have reserved stack.
 416          */
 417         load_context_kprintf("stack %x, stackptr %x\n",
 418                              thread->kernel_stack, thread->machine.kstackptr);
 419         if (!thread->kernel_stack) {
 420                 load_context_kprintf("calling stack_alloc_try\n");
 421                 if (!stack_alloc_try(thread))
 422                         panic("load_context");
 423         }
 424
 425         /*
 426          * The idle processor threads are not counted as
 427          * running for load calculations.
 428          */
 429         if (!(thread->state & TH_IDLE))
 430                 sched_run_incr();
 431
 432         processor->active_thread = thread;
 433         processor->current_pri = thread->sched_pri;
 434         processor->deadline = UINT64_MAX;
 435         thread->last_processor = processor;
 436
 437         processor->last_dispatch = mach_absolute_time();
 438         timer_start(&thread->system_timer, processor->last_dispatch);
 439         PROCESSOR_DATA(processor, thread_timer) = PROCESSOR_DATA(processor, kernel_timer) = &thread->system_timer;
 440
 441         timer_start(&PROCESSOR_DATA(processor, system_state), processor->last_dispatch);
 442         PROCESSOR_DATA(processor, current_state) = &PROCESSOR_DATA(processor, system_state);
 443
 444         PMAP_ACTIVATE_USER(thread, PROCESSOR_DATA(processor, slot_num));
 445
 446         load_context_kprintf("calling machine_load_context\n");
 447         machine_load_context(thread);
 448         /*NOTREACHED*/
 449 }