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_kern.h>
  90 #include <vm/vm_init.h>
  91 #include <vm/vm_map.h>
  92 #include <vm/vm_object.h>
  93 #include <vm/vm_page.h>
  94 #include <vm/vm_pageout.h>
  95 #include <machine/pmap.h>
  96 #include <machine/commpage.h>
  97 #include <sys/version.h>
  98
  99 #ifdef __ppc__
 100 #include <ppc/Firmware.h>
 101 #include <ppc/mappings.h>
 102 #endif
 103
 104 /* Externs XXX */
 105 extern void     rtclock_reset(void);
 106
 107 /* Forwards */
 108 void            cpu_launch_first_thread(
 109                         thread_t                        thread);
 110 void            start_kernel_threads(void);
 111 void        swapin_thread();
 112
 113 /*
 114  *      Running in virtual memory, on the interrupt stack.
 115  *      Does not return.  Dispatches initial thread.
 116  *
 117  *      Assumes that master_cpu is set.
 118  */
 119 void
 120 setup_main(void)
 121 {
 122         thread_t        startup_thread;
 123
 124         sched_init();
 125         vm_mem_bootstrap();
 126         ipc_bootstrap();
 127         vm_mem_init();
 128         ipc_init();
 129
 130         /*
 131          * As soon as the virtual memory system is up, we record
 132          * that this CPU is using the kernel pmap.
 133          */
 134         PMAP_ACTIVATE_KERNEL(master_cpu);
 135
 136 #ifdef __ppc__
 137         mapping_free_prime();                                           /* Load up with temporary mapping blocks */
 138 #endif
 139
 140         machine_init();
 141         kmod_init();
 142         clock_init();
 143
 144         init_timers();
 145         timer_call_initialize();
 146
 147         machine_info.max_cpus = NCPUS;
 148         machine_info.memory_size = mem_size;
 149         machine_info.avail_cpus = 0;
 150         machine_info.major_version = KERNEL_MAJOR_VERSION;
 151         machine_info.minor_version = KERNEL_MINOR_VERSION;
 152
 153         /*
 154          *      Initialize the IPC, task, and thread subsystems.
 155          */
 156         ledger_init();
 157         task_init();
 158         act_init();
 159         thread_init();
 160
 161         /*
 162          *      Initialize the Event Trace Analysis Package.
 163          *      Dynamic Phase: 2 of 2
 164          */
 165         etap_init_phase2();
 166
 167         /*
 168          *      Create a kernel thread to start the other kernel
 169          *      threads.
 170          */
 171         startup_thread = kernel_thread_with_priority(
 172                                                                                 kernel_task, MAXPRI_KERNEL,
 173                                                                                         start_kernel_threads, TRUE, FALSE);
 174         /*
 175          * Pretend it is already running.
 176          *
 177          * We can do this without locking, because nothing
 178          * else is running yet.
 179          */
 180         startup_thread->state = TH_RUN;
 181         hw_atomic_add(&startup_thread->processor_set->run_count, 1);
 182
 183         /*
 184          * Start the thread.
 185          */
 186         cpu_launch_first_thread(startup_thread);
 187         /*NOTREACHED*/
 188         panic("cpu_launch_first_thread returns!");
 189 }
 190
 191 /*
 192  * Now running in a thread.  Create the rest of the kernel threads
 193  * and the bootstrap task.
 194  */
 195 void
 196 start_kernel_threads(void)
 197 {
 198         register int                            i;
 199
 200         thread_bind(current_thread(), cpu_to_processor(cpu_number()));
 201
 202         /*
 203          *      Create the idle threads and the other
 204          *      service threads.
 205          */
 206         for (i = 0; i < NCPUS; i++) {
 207                 processor_t             processor = cpu_to_processor(i);
 208                 thread_t                thread;
 209                 spl_t                   s;
 210
 211                 thread = kernel_thread_with_priority(
 212                                                                         kernel_task, MAXPRI_KERNEL,
 213                                                                                         idle_thread, TRUE, FALSE);
 214                 s = splsched();
 215                 thread_lock(thread);
 216                 thread_bind_locked(thread, processor);
 217                 processor->idle_thread = thread;
 218                 thread->ref_count++;
 219                 thread->state |= TH_IDLE;
 220                 thread_go_locked(thread, THREAD_AWAKENED);
 221                 thread_unlock(thread);
 222                 splx(s);
 223         }
 224
 225         /*
 226          * Initialize the thread reaper mechanism.
 227          */
 228         thread_reaper_init();
 229
 230         /*
 231          * Initialize the stack swapin mechanism.
 232          */
 233         swapin_init();
 234
 235         /*
 236          * Initialize the periodic scheduler mechanism.
 237          */
 238         sched_tick_init();
 239
 240         /*
 241          * Initialize the thread callout mechanism.
 242          */
 243         thread_call_initialize();
 244
 245         /*
 246          * Invoke some black magic.
 247          */
 248 #if __ppc__
 249         mapping_adjust();
 250 #endif
 251
 252         /*
 253          *      Create the clock service.
 254          */
 255         clock_service_create();
 256
 257         /*
 258          *      Create the device service.
 259          */
 260         device_service_create();
 261
 262         shared_file_boot_time_init();
 263
 264 #ifdef  IOKIT
 265         {
 266                 PE_init_iokit();
 267         }
 268 #endif
 269
 270         (void) spllo();         /* Allow interruptions */
 271
 272     /*
 273      *  Fill in the comm area (mapped into every task address space.)
 274      */
 275     commpage_populate();
 276
 277         /*
 278          *      Start the user bootstrap.
 279          */
 280
 281 #ifdef  MACH_BSD
 282         {
 283                 extern void bsd_init(void);
 284                 bsd_init();
 285         }
 286 #endif
 287
 288         thread_bind(current_thread(), PROCESSOR_NULL);
 289
 290         /*
 291          *      Become the pageout daemon.
 292          */
 293
 294         vm_pageout();
 295         /*NOTREACHED*/
 296 }
 297
 298 void
 299 slave_main(void)
 300 {
 301         processor_t             myprocessor = current_processor();
 302         thread_t                thread;
 303
 304         myprocessor->cpu_data = get_cpu_data();
 305         thread = myprocessor->next_thread;
 306         myprocessor->next_thread = THREAD_NULL;
 307         if (thread == THREAD_NULL) {
 308                 thread = machine_wake_thread;
 309                 machine_wake_thread = THREAD_NULL;
 310         }
 311         thread_machine_set_current(thread);
 312         if (thread == machine_wake_thread)
 313                 thread_bind(thread, myprocessor);
 314
 315         cpu_launch_first_thread(thread);
 316         /*NOTREACHED*/
 317         panic("slave_main");
 318 }
 319
 320 /*
 321  * Now running in a thread context
 322  */
 323 void
 324 start_cpu_thread(void)
 325 {
 326         processor_t     processor;
 327
 328         processor = cpu_to_processor(cpu_number());
 329
 330         slave_machine_init();
 331
 332         if (processor->processor_self == IP_NULL) {
 333                 ipc_processor_init(processor);
 334                 ipc_processor_enable(processor);
 335         }
 336
 337         (void) thread_terminate(current_act());
 338 }
 339
 340 /*
 341  *      Start up the first thread on a CPU.
 342  */
 343 void
 344 cpu_launch_first_thread(
 345         thread_t                thread)
 346 {
 347         register int    mycpu = cpu_number();
 348         processor_t             processor = cpu_to_processor(mycpu);
 349
 350         processor->cpu_data->preemption_level = 0;
 351
 352         cpu_up(mycpu);
 353         start_timer(&kernel_timer[mycpu]);
 354         clock_get_uptime(&processor->last_dispatch);
 355
 356         if (thread == THREAD_NULL || thread == processor->idle_thread)
 357                 panic("cpu_launch_first_thread");
 358
 359         rtclock_reset();                /* start realtime clock ticking */
 360         PMAP_ACTIVATE_KERNEL(mycpu);
 361
 362         thread_machine_set_current(thread);
 363         thread_lock(thread);
 364         thread->state &= ~TH_UNINT;
 365         thread->last_processor = processor;
 366         processor->current_pri = thread->sched_pri;
 367         _mk_sp_thread_begin(thread, processor);
 368         thread_unlock(thread);
 369         timer_switch(&thread->system_timer);
 370
 371         PMAP_ACTIVATE_USER(thread->top_act, mycpu);
 372
 373         /* preemption enabled by load_context */
 374         load_context(thread);
 375         /*NOTREACHED*/
 376 }