osfmk/kern/startup.c

   1 /*
   2  * Copyright (c) 2000-2004 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 <vm/vm_shared_memory_server.h>
  91 #include <vm/vm_kern.h>
  92 #include <vm/vm_init.h>
  93 #include <vm/vm_map.h>
  94 #include <vm/vm_object.h>
  95 #include <vm/vm_page.h>
  96 #include <vm/vm_pageout.h>
  97 #include <machine/pmap.h>
  98 #include <machine/commpage.h>
  99 #include <libkern/version.h>
 100
 101 #ifdef __ppc__
 102 #include <ppc/Firmware.h>
 103 #include <ppc/mappings.h>
 104 #include <ppc/serial_io.h>
 105 #endif
 106
 107 static void             kernel_bootstrap_thread(void);
 108
 109 static void             load_context(
 110                                         thread_t        thread);
 111
 112 /*
 113  *      Running in virtual memory, on the interrupt stack.
 114  */
 115 void
 116 kernel_bootstrap(void)
 117 {
 118         kern_return_t   result;
 119         thread_t                thread;
 120
 121         lck_mod_init();
 122         sched_init();
 123         vm_mem_bootstrap();
 124         ipc_bootstrap();
 125         vm_mem_init();
 126         ipc_init();
 127
 128         /*
 129          * As soon as the virtual memory system is up, we record
 130          * that this CPU is using the kernel pmap.
 131          */
 132         PMAP_ACTIVATE_KERNEL(master_cpu);
 133
 134         mapping_free_prime();                                           /* Load up with temporary mapping blocks */
 135
 136         machine_init();
 137         kmod_init();
 138         clock_init();
 139
 140         machine_info.memory_size = mem_size;
 141         machine_info.max_mem = max_mem;
 142         machine_info.major_version = version_major;
 143         machine_info.minor_version = version_minor;
 144
 145         /*
 146          *      Initialize the IPC, task, and thread subsystems.
 147          */
 148         ledger_init();
 149         task_init();
 150         thread_init();
 151
 152         /*
 153          *      Create a kernel thread to execute the kernel bootstrap.
 154          */
 155         result = kernel_thread_create((thread_continue_t)kernel_bootstrap_thread, NULL, MAXPRI_KERNEL, &thread);
 156         if (result != KERN_SUCCESS)
 157                 panic("kernel_bootstrap");
 158
 159         thread->state = TH_RUN;
 160         thread_deallocate(thread);
 161
 162         load_context(thread);
 163         /*NOTREACHED*/
 164 }
 165
 166 /*
 167  * Now running in a thread.  Kick off other services,
 168  * invoke user bootstrap, enter pageout loop.
 169  */
 170 static void
 171 kernel_bootstrap_thread(void)
 172 {
 173         processor_t             processor = current_processor();
 174         thread_t                self = current_thread();
 175
 176         /*
 177          * Create the idle processor thread.
 178          */
 179         idle_thread_create(processor);
 180
 181         /*
 182          * N.B. Do not stick anything else
 183          * before this point.
 184          *
 185          * Start up the scheduler services.
 186          */
 187         sched_startup();
 188
 189         /*
 190          * Remain on current processor as
 191          * additional processors come online.
 192          */
 193         thread_bind(self, processor);
 194
 195         /*
 196          * Kick off memory mapping adjustments.
 197          */
 198         mapping_adjust();
 199
 200         /*
 201          *      Create the clock service.
 202          */
 203         clock_service_create();
 204
 205         /*
 206          *      Create the device service.
 207          */
 208         device_service_create();
 209
 210         shared_file_boot_time_init(ENV_DEFAULT_ROOT, cpu_type());
 211
 212 #ifdef  IOKIT
 213         {
 214                 PE_init_iokit();
 215         }
 216 #endif
 217
 218         (void) spllo();         /* Allow interruptions */
 219
 220     /*
 221      *  Fill in the comm area (mapped into every task address space.)
 222      */
 223     commpage_populate();
 224
 225         /*
 226          *      Start the user bootstrap.
 227          */
 228 #ifdef  MACH_BSD
 229         {
 230                 bsd_init();
 231         }
 232 #endif
 233
 234 #if __ppc__
 235         serial_keyboard_init();         /* Start serial keyboard if wanted */
 236 #endif
 237
 238         thread_bind(self, PROCESSOR_NULL);
 239
 240         /*
 241          *      Become the pageout daemon.
 242          */
 243         vm_pageout();
 244         /*NOTREACHED*/
 245 }
 246
 247 /*
 248  *      slave_main:
 249  *
 250  *      Load the first thread to start a processor.
 251  */
 252 void
 253 slave_main(void)
 254 {
 255         processor_t             processor = current_processor();
 256         thread_t                thread;
 257
 258         /*
 259          *      Use the idle processor thread if there
 260          *      is no dedicated start up thread.
 261          */
 262         if (processor->next_thread == THREAD_NULL) {
 263                 thread = processor->idle_thread;
 264                 thread->continuation = (thread_continue_t)processor_start_thread;
 265                 thread->parameter = NULL;
 266         }
 267         else {
 268                 thread = processor->next_thread;
 269                 processor->next_thread = THREAD_NULL;
 270         }
 271
 272         load_context(thread);
 273         /*NOTREACHED*/
 274 }
 275
 276 /*
 277  *      processor_start_thread:
 278  *
 279  *      First thread to execute on a started processor.
 280  *
 281  *      Called at splsched.
 282  */
 283 void
 284 processor_start_thread(void)
 285 {
 286         processor_t             processor = current_processor();
 287         thread_t                self = current_thread();
 288
 289         slave_machine_init();
 290
 291         /*
 292          *      If running the idle processor thread,
 293          *      reenter the idle loop, else terminate.
 294          */
 295         if (self == processor->idle_thread)
 296                 thread_block((thread_continue_t)idle_thread);
 297
 298         thread_terminate(self);
 299         /*NOTREACHED*/
 300 }
 301
 302 /*
 303  *      load_context:
 304  *
 305  *      Start the first thread on a processor.
 306  */
 307 static void
 308 load_context(
 309         thread_t                thread)
 310 {
 311         processor_t             processor = current_processor();
 312
 313         machine_set_current_thread(thread);
 314         processor_up(processor);
 315
 316         PMAP_ACTIVATE_KERNEL(PROCESSOR_DATA(processor, slot_num));
 317
 318         /*
 319          * Acquire a stack if none attached.  The panic
 320          * should never occur since the thread is expected
 321          * to have reserved stack.
 322          */
 323         if (!thread->kernel_stack) {
 324                 if (!stack_alloc_try(thread))
 325                         panic("load_context");
 326         }
 327
 328         /*
 329          * The idle processor threads are not counted as
 330          * running for load calculations.
 331          */
 332         if (!(thread->state & TH_IDLE))
 333                 pset_run_incr(thread->processor_set);
 334
 335         processor->active_thread = thread;
 336         processor->current_pri = thread->sched_pri;
 337         processor->deadline = UINT64_MAX;
 338         thread->last_processor = processor;
 339
 340         processor->last_dispatch = mach_absolute_time();
 341         timer_switch((uint32_t)processor->last_dispatch,
 342                                                         &PROCESSOR_DATA(processor, offline_timer));
 343
 344         PMAP_ACTIVATE_USER(thread, PROCESSOR_DATA(processor, slot_num));
 345
 346         machine_load_context(thread);
 347         /*NOTREACHED*/
 348 }