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
 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         thread_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.
 169          */
 170         startup_thread = kernel_thread_create(start_kernel_threads, MAXPRI_KERNEL);
 171
 172         /*
 173          * Start the thread.
 174          */
 175         startup_thread->state = TH_RUN;
 176         pset_run_incr(startup_thread->processor_set);
 177
 178         cpu_launch_first_thread(startup_thread);
 179         /*NOTREACHED*/
 180         panic("cpu_launch_first_thread returns!");
 181 }
 182
 183 /*
 184  * Now running in a thread.  Create the rest of the kernel threads
 185  * and the bootstrap task.
 186  */
 187 void
 188 start_kernel_threads(void)
 189 {
 190         register int                            i;
 191
 192         thread_bind(current_thread(), cpu_to_processor(cpu_number()));
 193
 194         /*
 195          *      Create the idle threads and the other
 196          *      service threads.
 197          */
 198         for (i = 0; i < NCPUS; i++) {
 199                 processor_t             processor = cpu_to_processor(i);
 200                 thread_t                thread;
 201                 spl_t                   s;
 202
 203                 thread = kernel_thread_create(idle_thread, MAXPRI_KERNEL);
 204
 205                 s = splsched();
 206                 thread_lock(thread);
 207                 thread->bound_processor = processor;
 208                 processor->idle_thread = thread;
 209                 thread->ref_count++;
 210                 thread->sched_pri = thread->priority = IDLEPRI;
 211                 thread->state = (TH_RUN | TH_IDLE);
 212                 thread_unlock(thread);
 213                 splx(s);
 214         }
 215
 216         /*
 217          * Initialize the thread reaper mechanism.
 218          */
 219         thread_reaper_init();
 220
 221         /*
 222          * Initialize the stack swapin mechanism.
 223          */
 224         swapin_init();
 225
 226         /*
 227          * Initialize the periodic scheduler mechanism.
 228          */
 229         sched_tick_init();
 230
 231         /*
 232          * Initialize the thread callout mechanism.
 233          */
 234         thread_call_initialize();
 235
 236         /*
 237          * Invoke some black magic.
 238          */
 239 #if __ppc__
 240         mapping_adjust();
 241 #endif
 242
 243         /*
 244          *      Create the clock service.
 245          */
 246         clock_service_create();
 247
 248         /*
 249          *      Create the device service.
 250          */
 251         device_service_create();
 252
 253         shared_file_boot_time_init(ENV_DEFAULT_ROOT, machine_slot[cpu_number()].cpu_type);
 254
 255 #ifdef  IOKIT
 256         {
 257                 PE_init_iokit();
 258         }
 259 #endif
 260
 261         (void) spllo();         /* Allow interruptions */
 262
 263     /*
 264      *  Fill in the comm area (mapped into every task address space.)
 265      */
 266     commpage_populate();
 267
 268         /*
 269          *      Start the user bootstrap.
 270          */
 271
 272 #ifdef  MACH_BSD
 273         {
 274                 extern void bsd_init(void);
 275                 bsd_init();
 276         }
 277 #endif
 278
 279 #if __ppc__
 280         serial_keyboard_init();         /* Start serial keyboard if wanted */
 281 #endif
 282
 283         thread_bind(current_thread(), PROCESSOR_NULL);
 284
 285         /*
 286          *      Become the pageout daemon.
 287          */
 288
 289         vm_pageout();
 290         /*NOTREACHED*/
 291 }
 292
 293 void
 294 slave_main(void)
 295 {
 296         processor_t             myprocessor = current_processor();
 297         thread_t                thread;
 298
 299         thread = myprocessor->next_thread;
 300         myprocessor->next_thread = THREAD_NULL;
 301         if (thread == THREAD_NULL) {
 302                 thread = machine_wake_thread;
 303                 machine_wake_thread = THREAD_NULL;
 304         }
 305
 306         cpu_launch_first_thread(thread);
 307         /*NOTREACHED*/
 308         panic("slave_main");
 309 }
 310
 311 /*
 312  * Now running in a thread context
 313  */
 314 void
 315 start_cpu_thread(void)
 316 {
 317         slave_machine_init();
 318
 319         (void) thread_terminate(current_act());
 320 }
 321
 322 /*
 323  *      Start up the first thread on a CPU.
 324  */
 325 void
 326 cpu_launch_first_thread(
 327         thread_t                thread)
 328 {
 329         register int    mycpu = cpu_number();
 330         processor_t             processor = cpu_to_processor(mycpu);
 331
 332         clock_get_uptime(&processor->last_dispatch);
 333         start_timer(&kernel_timer[mycpu]);
 334         machine_thread_set_current(thread);
 335         cpu_up(mycpu);
 336
 337         rtclock_reset();                /* start realtime clock ticking */
 338         PMAP_ACTIVATE_KERNEL(mycpu);
 339
 340         thread_lock(thread);
 341         thread->state &= ~TH_UNINT;
 342         thread->last_processor = processor;
 343         processor->active_thread = thread;
 344         processor->current_pri = thread->sched_pri;
 345         _mk_sp_thread_begin(thread, processor);
 346         thread_unlock(thread);
 347         timer_switch(&thread->system_timer);
 348
 349         PMAP_ACTIVATE_USER(thread->top_act, mycpu);
 350
 351         /* preemption enabled by load_context */
 352         machine_load_context(thread);
 353         /*NOTREACHED*/
 354 }