osfmk/kern/startup.c

   1 /*
   2  * Copyright (c) 2000-2007 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 CONFIG_MACF
 108 #include <security/mac_mach_internal.h>
 109 #endif
 110
 111 #ifdef __ppc__
 112 #include <ppc/Firmware.h>
 113 #include <ppc/mappings.h>
 114 #endif
 115
 116 static void             kernel_bootstrap_thread(void);
 117
 118 static void             load_context(
 119                                         thread_t        thread);
 120 #ifdef i386
 121 extern void cpu_userwindow_init(int);
 122 extern void cpu_physwindow_init(int);
 123 #endif
 124
 125 #ifdef CONFIG_JETTISON_KERNEL_LINKER
 126 extern void     jettison_kernel_linker(void);
 127 #endif
 128
 129 /*
 130  *      Running in virtual memory, on the interrupt stack.
 131  */
 132
 133 void
 134 kernel_bootstrap(void)
 135 {
 136         kern_return_t   result;
 137         thread_t                thread;
 138
 139         printf("%s\n", version); /* log kernel version */
 140
 141 #define kernel_bootstrap_kprintf(x...) /* kprintf("kernel_bootstrap: " x) */
 142
 143         kernel_bootstrap_kprintf("calling lck_mod_init\n");
 144         lck_mod_init();
 145
 146         kernel_bootstrap_kprintf("calling sched_init\n");
 147         sched_init();
 148
 149         kernel_bootstrap_kprintf("calling vm_mem_bootstrap\n");
 150         vm_mem_bootstrap();
 151
 152         kernel_bootstrap_kprintf("calling ipc_bootstrap\n");
 153         ipc_bootstrap();
 154
 155         kernel_bootstrap_kprintf("calling vm_mem_init\n");
 156         vm_mem_init();
 157
 158         kernel_bootstrap_kprintf("calling kmod_init\n");
 159         kmod_init();
 160 #if CONFIG_MACF
 161         mac_policy_init();
 162 #endif
 163         kernel_bootstrap_kprintf("calling ipc_init\n");
 164         ipc_init();
 165
 166         /*
 167          * As soon as the virtual memory system is up, we record
 168          * that this CPU is using the kernel pmap.
 169          */
 170         kernel_bootstrap_kprintf("calling PMAP_ACTIVATE_KERNEL\n");
 171         PMAP_ACTIVATE_KERNEL(master_cpu);
 172
 173         kernel_bootstrap_kprintf("calling mapping_free_prime\n");
 174         mapping_free_prime();                                           /* Load up with temporary mapping blocks */
 175
 176         kernel_bootstrap_kprintf("calling machine_init\n");
 177         machine_init();
 178
 179         kernel_bootstrap_kprintf("calling clock_init\n");
 180         clock_init();
 181
 182         machine_info.memory_size = mem_size;
 183         machine_info.max_mem = max_mem;
 184         machine_info.major_version = version_major;
 185         machine_info.minor_version = version_minor;
 186
 187         /*
 188          *      Initialize the IPC, task, and thread subsystems.
 189          */
 190         kernel_bootstrap_kprintf("calling ledger_init\n");
 191         ledger_init();
 192
 193         kernel_bootstrap_kprintf("calling task_init\n");
 194         task_init();
 195
 196         kernel_bootstrap_kprintf("calling thread_init\n");
 197         thread_init();
 198
 199         /*
 200          *      Create a kernel thread to execute the kernel bootstrap.
 201          */
 202         kernel_bootstrap_kprintf("calling kernel_thread_create\n");
 203         result = kernel_thread_create((thread_continue_t)kernel_bootstrap_thread, NULL, MAXPRI_KERNEL, &thread);
 204
 205         if (result != KERN_SUCCESS) panic("kernel_bootstrap: result = %08X\n", result);
 206
 207         thread->state = TH_RUN;
 208         thread_deallocate(thread);
 209
 210         kernel_bootstrap_kprintf("calling load_context - done\n");
 211         load_context(thread);
 212         /*NOTREACHED*/
 213 }
 214
 215 int kth_started = 0;
 216
 217 /*
 218  * Now running in a thread.  Kick off other services,
 219  * invoke user bootstrap, enter pageout loop.
 220  */
 221 static void
 222 kernel_bootstrap_thread(void)
 223 {
 224         processor_t             processor = current_processor();
 225
 226 #define kernel_bootstrap_thread_kprintf(x...) /* kprintf("kernel_bootstrap_thread: " x) */
 227         kernel_bootstrap_thread_kprintf("calling idle_thread_create\n");
 228         /*
 229          * Create the idle processor thread.
 230          */
 231         idle_thread_create(processor);
 232
 233         /*
 234          * N.B. Do not stick anything else
 235          * before this point.
 236          *
 237          * Start up the scheduler services.
 238          */
 239         kernel_bootstrap_thread_kprintf("calling sched_startup\n");
 240         sched_startup();
 241
 242         /*
 243          * Remain on current processor as
 244          * additional processors come online.
 245          */
 246         kernel_bootstrap_thread_kprintf("calling thread_bind\n");
 247         thread_bind(processor);
 248
 249         /*
 250          * Kick off memory mapping adjustments.
 251          */
 252         kernel_bootstrap_thread_kprintf("calling mapping_adjust\n");
 253         mapping_adjust();
 254
 255         /*
 256          *      Create the clock service.
 257          */
 258         kernel_bootstrap_thread_kprintf("calling clock_service_create\n");
 259         clock_service_create();
 260
 261         /*
 262          *      Create the device service.
 263          */
 264         device_service_create();
 265
 266         kth_started = 1;
 267
 268 #ifdef i386
 269         /*
 270          * Create and initialize the physical copy window for processor 0
 271          * This is required before starting kicking off  IOKit.
 272          */
 273         cpu_physwindow_init(0);
 274 #endif
 275
 276 #ifdef  IOKIT
 277         PE_init_iokit();
 278 #endif
 279
 280         (void) spllo();         /* Allow interruptions */
 281
 282 #ifdef i386
 283         /*
 284          * Create and initialize the copy window for processor 0
 285          * This also allocates window space for all other processors.
 286          * However, this is dependent on the number of processors - so this call
 287          * must be after IOKit has been started because IOKit performs processor
 288          * discovery.
 289          */
 290         cpu_userwindow_init(0);
 291 #endif
 292
 293         /*
 294          *      Initialize the shared region module.
 295          */
 296         vm_shared_region_init();
 297         vm_commpage_init();
 298
 299 #if CONFIG_MACF
 300         mac_policy_initmach();
 301 #endif
 302
 303         /*
 304          *      Start the user bootstrap.
 305          */
 306 #ifdef  MACH_BSD
 307         bsd_init();
 308 #endif
 309
 310 #ifdef CONFIG_JETTISON_KERNEL_LINKER
 311         /* We do not run kextd, so get rid of the kernel linker now */
 312         jettison_kernel_linker();
 313 #endif
 314
 315         serial_keyboard_init();         /* Start serial keyboard if wanted */
 316
 317         thread_bind(PROCESSOR_NULL);
 318
 319         /*
 320          *      Become the pageout daemon.
 321          */
 322         vm_pageout();
 323         /*NOTREACHED*/
 324 }
 325
 326 /*
 327  *      slave_main:
 328  *
 329  *      Load the first thread to start a processor.
 330  */
 331 void
 332 slave_main(void)
 333 {
 334         processor_t             processor = current_processor();
 335         thread_t                thread;
 336
 337         /*
 338          *      Use the idle processor thread if there
 339          *      is no dedicated start up thread.
 340          */
 341         if (processor->next_thread == THREAD_NULL) {
 342                 thread = processor->idle_thread;
 343                 thread->continuation = (thread_continue_t)processor_start_thread;
 344                 thread->parameter = NULL;
 345         }
 346         else {
 347                 thread = processor->next_thread;
 348                 processor->next_thread = THREAD_NULL;
 349         }
 350
 351         load_context(thread);
 352         /*NOTREACHED*/
 353 }
 354
 355 /*
 356  *      processor_start_thread:
 357  *
 358  *      First thread to execute on a started processor.
 359  *
 360  *      Called at splsched.
 361  */
 362 void
 363 processor_start_thread(void)
 364 {
 365         processor_t             processor = current_processor();
 366         thread_t                self = current_thread();
 367
 368         slave_machine_init();
 369
 370         /*
 371          *      If running the idle processor thread,
 372          *      reenter the idle loop, else terminate.
 373          */
 374         if (self == processor->idle_thread)
 375                 thread_block((thread_continue_t)idle_thread);
 376
 377         thread_terminate(self);
 378         /*NOTREACHED*/
 379 }
 380
 381 /*
 382  *      load_context:
 383  *
 384  *      Start the first thread on a processor.
 385  */
 386 static void
 387 load_context(
 388         thread_t                thread)
 389 {
 390         processor_t             processor = current_processor();
 391
 392
 393 #define load_context_kprintf(x...) /* kprintf("load_context: " x) */
 394
 395         load_context_kprintf("calling machine_set_current_thread\n");
 396         machine_set_current_thread(thread);
 397
 398         load_context_kprintf("calling processor_up\n");
 399         processor_up(processor);
 400
 401         PMAP_ACTIVATE_KERNEL(PROCESSOR_DATA(processor, slot_num));
 402
 403         /*
 404          * Acquire a stack if none attached.  The panic
 405          * should never occur since the thread is expected
 406          * to have reserved stack.
 407          */
 408         load_context_kprintf("stack %x, stackptr %x\n",
 409                               thread->kernel_stack, thread->machine.kstackptr);
 410         if (!thread->kernel_stack) {
 411                 load_context_kprintf("calling stack_alloc_try\n");
 412                 if (!stack_alloc_try(thread))
 413                         panic("load_context");
 414         }
 415
 416         /*
 417          * The idle processor threads are not counted as
 418          * running for load calculations.
 419          */
 420         if (!(thread->state & TH_IDLE))
 421                 sched_run_incr();
 422
 423         processor->active_thread = thread;
 424         processor->current_pri = thread->sched_pri;
 425         processor->deadline = UINT64_MAX;
 426         thread->last_processor = processor;
 427
 428         processor->last_dispatch = mach_absolute_time();
 429         timer_start(&thread->system_timer, processor->last_dispatch);
 430         PROCESSOR_DATA(processor, thread_timer) = PROCESSOR_DATA(processor, kernel_timer) = &thread->system_timer;
 431
 432         timer_start(&PROCESSOR_DATA(processor, system_state), processor->last_dispatch);
 433         PROCESSOR_DATA(processor, current_state) = &PROCESSOR_DATA(processor, system_state);
 434
 435         PMAP_ACTIVATE_USER(thread, PROCESSOR_DATA(processor, slot_num));
 436
 437         load_context_kprintf("calling machine_load_context\n");
 438         machine_load_context(thread);
 439         /*NOTREACHED*/
 440 }