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/sf.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         pager_mux_hash_init();
 126
 127         /*
 128          * As soon as the virtual memory system is up, we record
 129          * that this CPU is using the kernel pmap.
 130          */
 131         PMAP_ACTIVATE_KERNEL(master_cpu);
 132
 133 #ifdef __ppc__
 134         mapping_free_prime();                                           /* Load up with temporary mapping blocks */
 135 #endif
 136
 137         machine_init();
 138         kmod_init();
 139         clock_init();
 140
 141         init_timers();
 142         timer_call_initialize();
 143
 144         machine_info.max_cpus = NCPUS;
 145         machine_info.memory_size = mem_size;
 146         machine_info.avail_cpus = 0;
 147         machine_info.major_version = KERNEL_MAJOR_VERSION;
 148         machine_info.minor_version = KERNEL_MINOR_VERSION;
 149
 150         /*
 151          *      Initialize the IPC, task, and thread subsystems.
 152          */
 153         ledger_init();
 154         swapper_init();
 155         task_init();
 156         act_init();
 157         thread_init();
 158         subsystem_init();
 159
 160         /*
 161          *      Initialize the Event Trace Analysis Package.
 162          *      Dynamic Phase: 2 of 2
 163          */
 164         etap_init_phase2();
 165
 166         /*
 167          *      Create a kernel thread to start the other kernel
 168          *      threads.  Thread_resume (from kernel_thread) calls
 169          *      thread_setrun, which may look at current thread;
 170          *      we must avoid this, since there is no current thread.
 171          */
 172         startup_thread = kernel_thread_with_priority(kernel_task, MAXPRI_KERNBAND,
 173                                                                                         start_kernel_threads, FALSE);
 174
 175         /*
 176          * Pretend it is already running, and resume it.
 177          * Since it looks as if it is running, thread_resume
 178          * will not try to put it on the run queues.
 179          *
 180          * We can do all of this without locking, because nothing
 181          * else is running yet.
 182          */
 183         startup_thread->state = TH_RUN;
 184         (void) thread_resume(startup_thread->top_act);
 185         /*
 186          * Start the thread.
 187          */
 188         cpu_launch_first_thread(startup_thread);
 189         /*NOTREACHED*/
 190         panic("cpu_launch_first_thread returns!");
 191 }
 192
 193 /*
 194  * Now running in a thread.  Create the rest of the kernel threads
 195  * and the bootstrap task.
 196  */
 197 void
 198 start_kernel_threads(void)
 199 {
 200         register int                            i;
 201
 202         thread_bind(current_thread(), cpu_to_processor(cpu_number()));
 203
 204         /*
 205          *      Create the idle threads and the other
 206          *      service threads.
 207          */
 208         for (i = 0; i < NCPUS; i++) {
 209           if (1 /*machine_slot[i].is_cpu*/) {
 210                         processor_t             processor = cpu_to_processor(i);
 211                         thread_t                thread;
 212                         spl_t                   s;
 213
 214                         thread = kernel_thread_with_priority(kernel_task,
 215                                                                                 MAXPRI_KERNBAND, idle_thread, FALSE);
 216                         s = splsched();
 217                         thread_lock(thread);
 218                         thread_bind_locked(thread, processor);
 219                         processor->idle_thread = thread;
 220                         thread->state |= TH_IDLE;
 221                         thread_go_locked(thread, THREAD_AWAKENED);
 222                         thread_unlock(thread);
 223                         splx(s);
 224             }
 225         }
 226
 227         /*
 228          * Initialize the thread callout mechanism.
 229          */
 230         thread_call_initialize();
 231
 232         /*
 233          * Invoke some black magic.
 234          */
 235 #if __ppc__
 236         mapping_adjust();
 237 #endif
 238
 239         /*
 240          *      Invoke the thread reaper mechanism.
 241          */
 242         thread_reaper();
 243
 244         /*
 245          *      Start the stack swapin thread
 246          */
 247         kernel_thread(kernel_task, swapin_thread);
 248
 249         /*
 250          *      Invoke the periodic scheduler mechanism.
 251          */
 252         kernel_thread(kernel_task, sched_tick_thread);
 253
 254         /*
 255          *      Create the clock service.
 256          */
 257         clock_service_create();
 258
 259         /*
 260          *      Create the device service.
 261          */
 262         device_service_create();
 263
 264         shared_file_boot_time_init();
 265
 266 #ifdef  IOKIT
 267         {
 268                 PE_init_iokit();
 269         }
 270 #endif
 271
 272         /*
 273          *      Start the user bootstrap.
 274          */
 275
 276         (void) spllo();         /* Allow interruptions */
 277
 278 #ifdef  MACH_BSD
 279         {
 280                 extern void bsd_init(void);
 281                 bsd_init();
 282         }
 283 #endif
 284
 285         thread_bind(current_thread(), PROCESSOR_NULL);
 286
 287         /*
 288          *      Become the pageout daemon.
 289          */
 290
 291         vm_pageout();
 292         /*NOTREACHED*/
 293 }
 294
 295 void
 296 slave_main(void)
 297 {
 298         processor_t             myprocessor = current_processor();
 299         thread_t                thread;
 300
 301         thread = myprocessor->next_thread;
 302         myprocessor->next_thread = THREAD_NULL;
 303         if (thread == THREAD_NULL) {
 304                 thread = machine_wake_thread;
 305                 machine_wake_thread = THREAD_NULL;
 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 #if 0
 330         printf("start_cpu_thread done on cpu %x\n", cpu_number());
 331 #endif
 332         /* TODO: Mark this processor ready to dispatch threads */
 333
 334         (void) thread_terminate(current_act());
 335 }
 336
 337 /*
 338  *      Start up the first thread on a CPU.
 339  */
 340 void
 341 cpu_launch_first_thread(
 342         thread_t                thread)
 343 {
 344         register int    mycpu = cpu_number();
 345
 346         /* initialize preemption disabled */
 347         cpu_data[mycpu].preemption_level = 1;
 348
 349         cpu_up(mycpu);
 350         start_timer(&kernel_timer[mycpu]);
 351
 352         if (thread == THREAD_NULL) {
 353             thread = cpu_to_processor(mycpu)->idle_thread;
 354                 if (thread == THREAD_NULL)
 355                     panic("cpu_launch_first_thread");
 356         }
 357
 358         rtclock_reset();                /* start realtime clock ticking */
 359         PMAP_ACTIVATE_KERNEL(mycpu);
 360
 361         thread_machine_set_current(thread);
 362         thread_lock(thread);
 363         thread->state &= ~TH_UNINT;
 364         thread_unlock(thread);
 365         timer_switch(&thread->system_timer);
 366
 367         PMAP_ACTIVATE_USER(thread->top_act, mycpu);
 368
 369         /* preemption enabled by load_context */
 370         load_context(thread);
 371         /*NOTREACHED*/
 372 }