osfmk/kern/startup.c

   1 /*
   2  * Copyright (c) 2000 Apple Computer, Inc. All rights reserved.
   3  *
   4  * @APPLE_LICENSE_HEADER_START@
   5  *
   6  * The contents of this file constitute Original Code as defined in and
   7  * are subject to the Apple Public Source License Version 1.1 (the
   8  * "License").  You may not use this file except in compliance with the
   9  * License.  Please obtain a copy of the License at
  10  * http://www.apple.com/publicsource and read it before using this file.
  11  *
  12  * This Original Code and all software distributed under the License are
  13  * distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, EITHER
  14  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
  15  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
  16  * FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT.  Please see the
  17  * License for the specific language governing rights and limitations
  18  * under the License.
  19  *
  20  * @APPLE_LICENSE_HEADER_END@
  21  */
  22 /*
  23  * @OSF_COPYRIGHT@
  24  */
  25 /*
  26  * Mach Operating System
  27  * Copyright (c) 1991,1990,1989,1988 Carnegie Mellon University
  28  * All Rights Reserved.
  29  *
  30  * Permission to use, copy, modify and distribute this software and its
  31  * documentation is hereby granted, provided that both the copyright
  32  * notice and this permission notice appear in all copies of the
  33  * software, derivative works or modified versions, and any portions
  34  * thereof, and that both notices appear in supporting documentation.
  35  *
  36  * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
  37  * CONDITION.  CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND FOR
  38  * ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
  39  *
  40  * Carnegie Mellon requests users of this software to return to
  41  *
  42  *  Software Distribution Coordinator  or  Software.Distribution@CS.CMU.EDU
  43  *  School of Computer Science
  44  *  Carnegie Mellon University
  45  *  Pittsburgh PA 15213-3890
  46  *
  47  * any improvements or extensions that they make and grant Carnegie Mellon
  48  * the rights to redistribute these changes.
  49  */
  50 /*
  51  */
  52
  53 /*
  54  *      Mach kernel startup.
  55  */
  56
  57 #include <debug.h>
  58 #include <xpr_debug.h>
  59 #include <mach_kdp.h>
  60 #include <cpus.h>
  61 #include <mach_host.h>
  62 #include <norma_vm.h>
  63 #include <etap.h>
  64
  65 #include <mach/boolean.h>
  66 #include <mach/machine.h>
  67 #include <mach/task_special_ports.h>
  68 #include <mach/vm_param.h>
  69 #include <ipc/ipc_init.h>
  70 #include <kern/assert.h>
  71 #include <kern/misc_protos.h>
  72 #include <kern/clock.h>
  73 #include <kern/cpu_number.h>
  74 #include <kern/etap_macros.h>
  75 #include <kern/machine.h>
  76 #include <kern/processor.h>
  77 #include <kern/sched_prim.h>
  78 #include <kern/mk_sp.h>
  79 #include <kern/startup.h>
  80 #include <kern/task.h>
  81 #include <kern/thread.h>
  82 #include <kern/timer.h>
  83 #include <kern/timer_call.h>
  84 #include <kern/xpr.h>
  85 #include <kern/zalloc.h>
  86 #include <vm/vm_kern.h>
  87 #include <vm/vm_init.h>
  88 #include <vm/vm_map.h>
  89 #include <vm/vm_object.h>
  90 #include <vm/vm_page.h>
  91 #include <vm/vm_pageout.h>
  92 #include <machine/pmap.h>
  93 #include <sys/version.h>
  94
  95 #ifdef __ppc__
  96 #include <ppc/Firmware.h>
  97 #include <ppc/mappings.h>
  98 #endif
  99
 100 /* Externs XXX */
 101 extern void     rtclock_reset(void);
 102
 103 /* Forwards */
 104 void            cpu_launch_first_thread(
 105                         thread_t                        thread);
 106 void            start_kernel_threads(void);
 107 void        swapin_thread();
 108
 109 /*
 110  *      Running in virtual memory, on the interrupt stack.
 111  *      Does not return.  Dispatches initial thread.
 112  *
 113  *      Assumes that master_cpu is set.
 114  */
 115 void
 116 setup_main(void)
 117 {
 118         thread_t        startup_thread;
 119
 120         sched_init();
 121         vm_mem_bootstrap();
 122         ipc_bootstrap();
 123         vm_mem_init();
 124         ipc_init();
 125
 126         /*
 127          * As soon as the virtual memory system is up, we record
 128          * that this CPU is using the kernel pmap.
 129          */
 130         PMAP_ACTIVATE_KERNEL(master_cpu);
 131
 132 #ifdef __ppc__
 133         mapping_free_prime();                                           /* Load up with temporary mapping blocks */
 134 #endif
 135
 136         machine_init();
 137         kmod_init();
 138         clock_init();
 139
 140         init_timers();
 141         timer_call_initialize();
 142
 143         machine_info.max_cpus = NCPUS;
 144         machine_info.memory_size = mem_size;
 145         machine_info.avail_cpus = 0;
 146         machine_info.major_version = KERNEL_MAJOR_VERSION;
 147         machine_info.minor_version = KERNEL_MINOR_VERSION;
 148
 149         /*
 150          *      Initialize the IPC, task, and thread subsystems.
 151          */
 152         ledger_init();
 153         task_init();
 154         act_init();
 155         thread_init();
 156         subsystem_init();
 157
 158         /*
 159          *      Initialize the Event Trace Analysis Package.
 160          *      Dynamic Phase: 2 of 2
 161          */
 162         etap_init_phase2();
 163
 164         /*
 165          *      Create a kernel thread to start the other kernel
 166          *      threads.  Thread_resume (from kernel_thread) calls
 167          *      thread_setrun, which may look at current thread;
 168          *      we must avoid this, since there is no current thread.
 169          */
 170         startup_thread = kernel_thread_with_priority(
 171                                                                                 kernel_task, MAXPRI_KERNEL,
 172                                                                                         start_kernel_threads, TRUE, FALSE);
 173
 174         /*
 175          * Pretend it is already running, and resume it.
 176          * Since it looks as if it is running, thread_resume
 177          * will not try to put it on the run queues.
 178          *
 179          * We can do all of this without locking, because nothing
 180          * else is running yet.
 181          */
 182         startup_thread->state = TH_RUN;
 183         (void) thread_resume(startup_thread->top_act);
 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 stack swapin mechanism.
 228          */
 229         swapin_init();
 230
 231         /*
 232          * Initialize the periodic scheduler mechanism.
 233          */
 234         sched_tick_init();
 235
 236         /*
 237          * Initialize the thread callout mechanism.
 238          */
 239         thread_call_initialize();
 240
 241         /*
 242          * Invoke some black magic.
 243          */
 244 #if __ppc__
 245         mapping_adjust();
 246 #endif
 247
 248         /*
 249          * Initialize the thread reaper mechanism.
 250          */
 251         thread_reaper();
 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();
 264
 265 #ifdef  IOKIT
 266         {
 267                 PE_init_iokit();
 268         }
 269 #endif
 270
 271         /*
 272          *      Start the user bootstrap.
 273          */
 274
 275         (void) spllo();         /* Allow interruptions */
 276
 277 #ifdef  MACH_BSD
 278         {
 279                 extern void bsd_init(void);
 280                 bsd_init();
 281         }
 282 #endif
 283
 284         thread_bind(current_thread(), PROCESSOR_NULL);
 285
 286         /*
 287          *      Become the pageout daemon.
 288          */
 289
 290         vm_pageout();
 291         /*NOTREACHED*/
 292 }
 293
 294 void
 295 slave_main(void)
 296 {
 297         processor_t             myprocessor = current_processor();
 298         thread_t                thread;
 299
 300         thread = myprocessor->next_thread;
 301         myprocessor->next_thread = THREAD_NULL;
 302         if (thread == THREAD_NULL) {
 303                 thread = machine_wake_thread;
 304                 machine_wake_thread = THREAD_NULL;
 305                 thread_bind(thread, myprocessor);
 306         }
 307         cpu_launch_first_thread(thread);
 308         /*NOTREACHED*/
 309         panic("slave_main");
 310 }
 311
 312 /*
 313  * Now running in a thread context
 314  */
 315 void
 316 start_cpu_thread(void)
 317 {
 318         processor_t     processor;
 319
 320         processor = cpu_to_processor(cpu_number());
 321
 322         slave_machine_init();
 323
 324         if (processor->processor_self == IP_NULL) {
 325                 ipc_processor_init(processor);
 326                 ipc_processor_enable(processor);
 327         }
 328
 329         (void) thread_terminate(current_act());
 330 }
 331
 332 /*
 333  *      Start up the first thread on a CPU.
 334  */
 335 void
 336 cpu_launch_first_thread(
 337         thread_t                thread)
 338 {
 339         register int    mycpu = cpu_number();
 340
 341         /* initialize preemption disabled */
 342         cpu_data[mycpu].preemption_level = 1;
 343
 344         cpu_up(mycpu);
 345         start_timer(&kernel_timer[mycpu]);
 346         clock_get_uptime(&cpu_to_processor(mycpu)->last_dispatch);
 347
 348         if (thread == THREAD_NULL) {
 349             thread = cpu_to_processor(mycpu)->idle_thread;
 350                 if (thread == THREAD_NULL)
 351                     panic("cpu_launch_first_thread");
 352         }
 353
 354         rtclock_reset();                /* start realtime clock ticking */
 355         PMAP_ACTIVATE_KERNEL(mycpu);
 356
 357         thread_machine_set_current(thread);
 358         thread_lock(thread);
 359         thread->state &= ~TH_UNINT;
 360         _mk_sp_thread_begin(thread);
 361         thread_unlock(thread);
 362         timer_switch(&thread->system_timer);
 363
 364         PMAP_ACTIVATE_USER(thread->top_act, mycpu);
 365
 366         /* preemption enabled by load_context */
 367         load_context(thread);
 368         /*NOTREACHED*/
 369 }