osfmk/kern/startup.c

   1 /*
   2  * Copyright (c) 2000 Apple Computer, Inc. All rights reserved.
   3  *
   4  * @APPLE_LICENSE_HEADER_START@
   5  *
   6  * Copyright (c) 1999-2003 Apple Computer, Inc.  All Rights Reserved.
   7  *
   8  * This file contains Original Code and/or Modifications of Original Code
   9  * as defined in and that are subject to the Apple Public Source License
  10  * Version 2.0 (the 'License'). You may not use this file except in
  11  * compliance with the License. Please obtain a copy of the License at
  12  * http://www.opensource.apple.com/apsl/ and read it before using this
  13  * file.
  14  *
  15  * The Original Code and all software distributed under the License are
  16  * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
  17  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
  18  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
  19  * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
  20  * Please see the License for the specific language governing rights and
  21  * limitations under the License.
  22  *
  23  * @APPLE_LICENSE_HEADER_END@
  24  */
  25 /*
  26  * @OSF_COPYRIGHT@
  27  */
  28 /*
  29  * Mach Operating System
  30  * Copyright (c) 1991,1990,1989,1988 Carnegie Mellon University
  31  * All Rights Reserved.
  32  *
  33  * Permission to use, copy, modify and distribute this software and its
  34  * documentation is hereby granted, provided that both the copyright
  35  * notice and this permission notice appear in all copies of the
  36  * software, derivative works or modified versions, and any portions
  37  * thereof, and that both notices appear in supporting documentation.
  38  *
  39  * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
  40  * CONDITION.  CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND FOR
  41  * ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
  42  *
  43  * Carnegie Mellon requests users of this software to return to
  44  *
  45  *  Software Distribution Coordinator  or  Software.Distribution@CS.CMU.EDU
  46  *  School of Computer Science
  47  *  Carnegie Mellon University
  48  *  Pittsburgh PA 15213-3890
  49  *
  50  * any improvements or extensions that they make and grant Carnegie Mellon
  51  * the rights to redistribute these changes.
  52  */
  53 /*
  54  */
  55
  56 /*
  57  *      Mach kernel startup.
  58  */
  59
  60 #include <debug.h>
  61 #include <xpr_debug.h>
  62 #include <mach_kdp.h>
  63 #include <cpus.h>
  64 #include <mach_host.h>
  65 #include <norma_vm.h>
  66 #include <etap.h>
  67
  68 #include <mach/boolean.h>
  69 #include <mach/machine.h>
  70 #include <mach/task_special_ports.h>
  71 #include <mach/vm_param.h>
  72 #include <ipc/ipc_init.h>
  73 #include <kern/assert.h>
  74 #include <kern/misc_protos.h>
  75 #include <kern/clock.h>
  76 #include <kern/cpu_number.h>
  77 #include <kern/etap_macros.h>
  78 #include <kern/machine.h>
  79 #include <kern/processor.h>
  80 #include <kern/sched_prim.h>
  81 #include <kern/mk_sp.h>
  82 #include <kern/startup.h>
  83 #include <kern/task.h>
  84 #include <kern/thread.h>
  85 #include <kern/timer.h>
  86 #include <kern/timer_call.h>
  87 #include <kern/xpr.h>
  88 #include <kern/zalloc.h>
  89 #include <vm/vm_shared_memory_server.h>
  90 #include <vm/vm_kern.h>
  91 #include <vm/vm_init.h>
  92 #include <vm/vm_map.h>
  93 #include <vm/vm_object.h>
  94 #include <vm/vm_page.h>
  95 #include <vm/vm_pageout.h>
  96 #include <machine/pmap.h>
  97 #include <machine/commpage.h>
  98 #include <sys/version.h>
  99
 100 #ifdef __ppc__
 101 #include <ppc/Firmware.h>
 102 #include <ppc/mappings.h>
 103 #endif
 104
 105 /* Externs XXX */
 106 extern void     rtclock_reset(void);
 107
 108 /* Forwards */
 109 void            cpu_launch_first_thread(
 110                         thread_t                        thread);
 111 void            start_kernel_threads(void);
 112 void        swapin_thread();
 113
 114 /*
 115  *      Running in virtual memory, on the interrupt stack.
 116  *      Does not return.  Dispatches initial thread.
 117  *
 118  *      Assumes that master_cpu is set.
 119  */
 120 void
 121 setup_main(void)
 122 {
 123         thread_t        startup_thread;
 124
 125         sched_init();
 126         vm_mem_bootstrap();
 127         ipc_bootstrap();
 128         vm_mem_init();
 129         ipc_init();
 130
 131         /*
 132          * As soon as the virtual memory system is up, we record
 133          * that this CPU is using the kernel pmap.
 134          */
 135         PMAP_ACTIVATE_KERNEL(master_cpu);
 136
 137 #ifdef __ppc__
 138         mapping_free_prime();                                           /* Load up with temporary mapping blocks */
 139 #endif
 140
 141         machine_init();
 142         kmod_init();
 143         clock_init();
 144
 145         init_timers();
 146         timer_call_initialize();
 147
 148         machine_info.max_cpus = NCPUS;
 149         machine_info.memory_size = mem_size;
 150         machine_info.avail_cpus = 0;
 151         machine_info.major_version = KERNEL_MAJOR_VERSION;
 152         machine_info.minor_version = KERNEL_MINOR_VERSION;
 153
 154         /*
 155          *      Initialize the IPC, task, and thread subsystems.
 156          */
 157         ledger_init();
 158         task_init();
 159         act_init();
 160         thread_init();
 161
 162         /*
 163          *      Initialize the Event Trace Analysis Package.
 164          *      Dynamic Phase: 2 of 2
 165          */
 166         etap_init_phase2();
 167
 168         /*
 169          *      Create a kernel thread to start the other kernel
 170          *      threads.
 171          */
 172         startup_thread = kernel_thread_with_priority(
 173                                                                                 kernel_task, MAXPRI_KERNEL,
 174                                                                                         start_kernel_threads, TRUE, FALSE);
 175         /*
 176          * Pretend it is already running.
 177          *
 178          * We can do this without locking, because nothing
 179          * else is running yet.
 180          */
 181         startup_thread->state = TH_RUN;
 182         hw_atomic_add(&startup_thread->processor_set->run_count, 1);
 183
 184         /*
 185          * Start the thread.
 186          */
 187         cpu_launch_first_thread(startup_thread);
 188         /*NOTREACHED*/
 189         panic("cpu_launch_first_thread returns!");
 190 }
 191
 192 /*
 193  * Now running in a thread.  Create the rest of the kernel threads
 194  * and the bootstrap task.
 195  */
 196 void
 197 start_kernel_threads(void)
 198 {
 199         register int                            i;
 200
 201         thread_bind(current_thread(), cpu_to_processor(cpu_number()));
 202
 203         /*
 204          *      Create the idle threads and the other
 205          *      service threads.
 206          */
 207         for (i = 0; i < NCPUS; i++) {
 208                 processor_t             processor = cpu_to_processor(i);
 209                 thread_t                thread;
 210                 spl_t                   s;
 211
 212                 thread = kernel_thread_with_priority(
 213                                                                         kernel_task, MAXPRI_KERNEL,
 214                                                                                         idle_thread, TRUE, FALSE);
 215                 s = splsched();
 216                 thread_lock(thread);
 217                 thread_bind_locked(thread, processor);
 218                 processor->idle_thread = thread;
 219                 thread->ref_count++;
 220                 thread->state |= TH_IDLE;
 221                 thread_go_locked(thread, THREAD_AWAKENED);
 222                 thread_unlock(thread);
 223                 splx(s);
 224         }
 225
 226         /*
 227          * Initialize the thread reaper mechanism.
 228          */
 229         thread_reaper_init();
 230
 231         /*
 232          * Initialize the stack swapin mechanism.
 233          */
 234         swapin_init();
 235
 236         /*
 237          * Initialize the periodic scheduler mechanism.
 238          */
 239         sched_tick_init();
 240
 241         /*
 242          * Initialize the thread callout mechanism.
 243          */
 244         thread_call_initialize();
 245
 246         /*
 247          * Invoke some black magic.
 248          */
 249 #if __ppc__
 250         mapping_adjust();
 251 #endif
 252
 253         /*
 254          *      Create the clock service.
 255          */
 256         clock_service_create();
 257
 258         /*
 259          *      Create the device service.
 260          */
 261         device_service_create();
 262
 263         shared_file_boot_time_init(ENV_DEFAULT_SYSTEM, ENV_DEFAULT_ROOT);
 264
 265 #ifdef  IOKIT
 266         {
 267                 PE_init_iokit();
 268         }
 269 #endif
 270
 271         (void) spllo();         /* Allow interruptions */
 272
 273     /*
 274      *  Fill in the comm area (mapped into every task address space.)
 275      */
 276     commpage_populate();
 277
 278         /*
 279          *      Start the user bootstrap.
 280          */
 281
 282 #ifdef  MACH_BSD
 283         {
 284                 extern void bsd_init(void);
 285                 bsd_init();
 286         }
 287 #endif
 288
 289 #if __ppc__
 290         serial_keyboard_init();         /* Start serial keyboard if wanted */
 291 #endif
 292
 293         thread_bind(current_thread(), PROCESSOR_NULL);
 294
 295         /*
 296          *      Become the pageout daemon.
 297          */
 298
 299         vm_pageout();
 300         /*NOTREACHED*/
 301 }
 302
 303 void
 304 slave_main(void)
 305 {
 306         processor_t             myprocessor = current_processor();
 307         thread_t                thread;
 308
 309         myprocessor->cpu_data = get_cpu_data();
 310         thread = myprocessor->next_thread;
 311         myprocessor->next_thread = THREAD_NULL;
 312         if (thread == THREAD_NULL) {
 313                 thread = machine_wake_thread;
 314                 machine_wake_thread = THREAD_NULL;
 315         }
 316         thread_machine_set_current(thread);
 317         if (thread == machine_wake_thread)
 318                 thread_bind(thread, myprocessor);
 319
 320         cpu_launch_first_thread(thread);
 321         /*NOTREACHED*/
 322         panic("slave_main");
 323 }
 324
 325 /*
 326  * Now running in a thread context
 327  */
 328 void
 329 start_cpu_thread(void)
 330 {
 331         processor_t     processor;
 332
 333         processor = cpu_to_processor(cpu_number());
 334
 335         slave_machine_init();
 336
 337         if (processor->processor_self == IP_NULL) {
 338                 ipc_processor_init(processor);
 339                 ipc_processor_enable(processor);
 340         }
 341
 342         (void) thread_terminate(current_act());
 343 }
 344
 345 /*
 346  *      Start up the first thread on a CPU.
 347  */
 348 void
 349 cpu_launch_first_thread(
 350         thread_t                thread)
 351 {
 352         register int    mycpu = cpu_number();
 353         processor_t             processor = cpu_to_processor(mycpu);
 354
 355         processor->cpu_data->preemption_level = 0;
 356
 357         cpu_up(mycpu);
 358         start_timer(&kernel_timer[mycpu]);
 359         clock_get_uptime(&processor->last_dispatch);
 360
 361         if (thread == THREAD_NULL || thread == processor->idle_thread)
 362                 panic("cpu_launch_first_thread");
 363
 364         rtclock_reset();                /* start realtime clock ticking */
 365         PMAP_ACTIVATE_KERNEL(mycpu);
 366
 367         thread_machine_set_current(thread);
 368         thread_lock(thread);
 369         thread->state &= ~TH_UNINT;
 370         thread->last_processor = processor;
 371         processor->current_pri = thread->sched_pri;
 372         _mk_sp_thread_begin(thread, processor);
 373         thread_unlock(thread);
 374         timer_switch(&thread->system_timer);
 375
 376         PMAP_ACTIVATE_USER(thread->top_act, mycpu);
 377
 378         /* preemption enabled by load_context */
 379         load_context(thread);
 380         /*NOTREACHED*/
 381 }