osfmk/kern/startup.c

   1 /*
   2  * Copyright (c) 2000-2005 Apple Computer, 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  */
  58
  59 /*
  60  *      Mach kernel startup.
  61  */
  62
  63 #include <debug.h>
  64 #include <xpr_debug.h>
  65 #include <mach_kdp.h>
  66 #include <mach_host.h>
  67 #include <norma_vm.h>
  68
  69 #include <mach/boolean.h>
  70 #include <mach/machine.h>
  71 #include <mach/thread_act.h>
  72 #include <mach/task_special_ports.h>
  73 #include <mach/vm_param.h>
  74 #include <ipc/ipc_init.h>
  75 #include <kern/assert.h>
  76 #include <kern/misc_protos.h>
  77 #include <kern/clock.h>
  78 #include <kern/cpu_number.h>
  79 #include <kern/ledger.h>
  80 #include <kern/machine.h>
  81 #include <kern/processor.h>
  82 #include <kern/sched_prim.h>
  83 #include <kern/startup.h>
  84 #include <kern/task.h>
  85 #include <kern/thread.h>
  86 #include <kern/timer.h>
  87 #include <kern/xpr.h>
  88 #include <kern/zalloc.h>
  89 #include <kern/locks.h>
  90 #include <console/serial_protos.h>
  91 #include <vm/vm_shared_memory_server.h>
  92 #include <vm/vm_kern.h>
  93 #include <vm/vm_init.h>
  94 #include <vm/vm_map.h>
  95 #include <vm/vm_object.h>
  96 #include <vm/vm_page.h>
  97 #include <vm/vm_pageout.h>
  98 #include <machine/pmap.h>
  99 #include <machine/commpage.h>
 100 #include <libkern/version.h>
 101
 102 #ifdef __ppc__
 103 #include <ppc/Firmware.h>
 104 #include <ppc/mappings.h>
 105 #endif
 106
 107 static void             kernel_bootstrap_thread(void);
 108
 109 static void             load_context(
 110                                         thread_t        thread);
 111
 112 #ifdef i386
 113 extern void     cpu_window_init(int);
 114 #endif
 115
 116
 117 /*
 118  *      Running in virtual memory, on the interrupt stack.
 119  */
 120
 121 void
 122 kernel_bootstrap(void)
 123 {
 124         kern_return_t   result;
 125         thread_t                thread;
 126
 127         lck_mod_init();
 128         sched_init();
 129         vm_mem_bootstrap();
 130         ipc_bootstrap();
 131         vm_mem_init();
 132         ipc_init();
 133
 134         /*
 135          * As soon as the virtual memory system is up, we record
 136          * that this CPU is using the kernel pmap.
 137          */
 138         PMAP_ACTIVATE_KERNEL(master_cpu);
 139
 140         mapping_free_prime();                                           /* Load up with temporary mapping blocks */
 141
 142         machine_init();
 143         kmod_init();
 144         clock_init();
 145
 146         machine_info.memory_size = mem_size;
 147         machine_info.max_mem = max_mem;
 148         machine_info.major_version = version_major;
 149         machine_info.minor_version = version_minor;
 150
 151         /*
 152          *      Initialize the IPC, task, and thread subsystems.
 153          */
 154         ledger_init();
 155         task_init();
 156         thread_init();
 157
 158         /*
 159          *      Create a kernel thread to execute the kernel bootstrap.
 160          */
 161         result = kernel_thread_create((thread_continue_t)kernel_bootstrap_thread, NULL, MAXPRI_KERNEL, &thread);
 162
 163         if (result != KERN_SUCCESS) panic("kernel_bootstrap: result = %08X\n", result);
 164
 165         thread->state = TH_RUN;
 166         thread_deallocate(thread);
 167
 168         load_context(thread);
 169         /*NOTREACHED*/
 170 }
 171
 172 /*
 173  * Now running in a thread.  Kick off other services,
 174  * invoke user bootstrap, enter pageout loop.
 175  */
 176 static void
 177 kernel_bootstrap_thread(void)
 178 {
 179         processor_t             processor = current_processor();
 180         thread_t                self = current_thread();
 181
 182         /*
 183          * Create the idle processor thread.
 184          */
 185         idle_thread_create(processor);
 186
 187         /*
 188          * N.B. Do not stick anything else
 189          * before this point.
 190          *
 191          * Start up the scheduler services.
 192          */
 193         sched_startup();
 194
 195         /*
 196          * Remain on current processor as
 197          * additional processors come online.
 198          */
 199         thread_bind(self, processor);
 200
 201         /*
 202          * Kick off memory mapping adjustments.
 203          */
 204         mapping_adjust();
 205
 206         /*
 207          *      Create the clock service.
 208          */
 209         clock_service_create();
 210
 211         /*
 212          *      Create the device service.
 213          */
 214         device_service_create();
 215
 216         shared_file_boot_time_init(ENV_DEFAULT_ROOT, cpu_type());
 217
 218 #ifdef  IOKIT
 219         {
 220                 PE_init_iokit();
 221         }
 222 #endif
 223
 224         (void) spllo();         /* Allow interruptions */
 225
 226         /*
 227          *      Fill in the comm area (mapped into every task address space.)
 228          */
 229         commpage_populate();
 230
 231 #ifdef i386
 232         /*
 233          *      create and initialize a copy window
 234          *      for processor 0
 235          */
 236         cpu_window_init(0);
 237 #endif
 238
 239         /*
 240          *      Start the user bootstrap.
 241          */
 242 #ifdef  MACH_BSD
 243         {
 244                 bsd_init();
 245         }
 246 #endif
 247
 248         serial_keyboard_init();         /* Start serial keyboard if wanted */
 249
 250         thread_bind(self, PROCESSOR_NULL);
 251
 252         /*
 253          *      Become the pageout daemon.
 254          */
 255         vm_pageout();
 256         /*NOTREACHED*/
 257 }
 258
 259 /*
 260  *      slave_main:
 261  *
 262  *      Load the first thread to start a processor.
 263  */
 264 void
 265 slave_main(void)
 266 {
 267         processor_t             processor = current_processor();
 268         thread_t                thread;
 269
 270         /*
 271          *      Use the idle processor thread if there
 272          *      is no dedicated start up thread.
 273          */
 274         if (processor->next_thread == THREAD_NULL) {
 275                 thread = processor->idle_thread;
 276                 thread->continuation = (thread_continue_t)processor_start_thread;
 277                 thread->parameter = NULL;
 278         }
 279         else {
 280                 thread = processor->next_thread;
 281                 processor->next_thread = THREAD_NULL;
 282         }
 283
 284         load_context(thread);
 285         /*NOTREACHED*/
 286 }
 287
 288 /*
 289  *      processor_start_thread:
 290  *
 291  *      First thread to execute on a started processor.
 292  *
 293  *      Called at splsched.
 294  */
 295 void
 296 processor_start_thread(void)
 297 {
 298         processor_t             processor = current_processor();
 299         thread_t                self = current_thread();
 300
 301         slave_machine_init();
 302
 303         /*
 304          *      If running the idle processor thread,
 305          *      reenter the idle loop, else terminate.
 306          */
 307         if (self == processor->idle_thread)
 308                 thread_block((thread_continue_t)idle_thread);
 309
 310         thread_terminate(self);
 311         /*NOTREACHED*/
 312 }
 313
 314 /*
 315  *      load_context:
 316  *
 317  *      Start the first thread on a processor.
 318  */
 319 static void
 320 load_context(
 321         thread_t                thread)
 322 {
 323         processor_t             processor = current_processor();
 324
 325         machine_set_current_thread(thread);
 326         processor_up(processor);
 327
 328         PMAP_ACTIVATE_KERNEL(PROCESSOR_DATA(processor, slot_num));
 329
 330         /*
 331          * Acquire a stack if none attached.  The panic
 332          * should never occur since the thread is expected
 333          * to have reserved stack.
 334          */
 335         if (!thread->kernel_stack) {
 336                 if (!stack_alloc_try(thread))
 337                         panic("load_context");
 338         }
 339
 340         /*
 341          * The idle processor threads are not counted as
 342          * running for load calculations.
 343          */
 344         if (!(thread->state & TH_IDLE))
 345                 pset_run_incr(thread->processor_set);
 346
 347         processor->active_thread = thread;
 348         processor->current_pri = thread->sched_pri;
 349         processor->deadline = UINT64_MAX;
 350         thread->last_processor = processor;
 351
 352         processor->last_dispatch = mach_absolute_time();
 353         timer_switch((uint32_t)processor->last_dispatch,
 354                                                         &PROCESSOR_DATA(processor, offline_timer));
 355
 356         PMAP_ACTIVATE_USER(thread, PROCESSOR_DATA(processor, slot_num));
 357
 358         machine_load_context(thread);
 359         /*NOTREACHED*/
 360 }