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_shared_memory_server.h>
  87 #include <vm/vm_kern.h>
  88 #include <vm/vm_init.h>
  89 #include <vm/vm_map.h>
  90 #include <vm/vm_object.h>
  91 #include <vm/vm_page.h>
  92 #include <vm/vm_pageout.h>
  93 #include <machine/pmap.h>
  94 #include <machine/commpage.h>
  95 #include <sys/version.h>
  96
  97 #ifdef __ppc__
  98 #include <ppc/Firmware.h>
  99 #include <ppc/mappings.h>
 100 #endif
 101
 102 /* Externs XXX */
 103 extern void     rtclock_reset(void);
 104
 105 /* Forwards */
 106 void            cpu_launch_first_thread(
 107                                 thread_t                thread);
 108 void            start_kernel_threads(void);
 109
 110 /*
 111  *      Running in virtual memory, on the interrupt stack.
 112  *      Does not return.  Dispatches initial thread.
 113  *
 114  *      Assumes that master_cpu is set.
 115  */
 116 void
 117 setup_main(void)
 118 {
 119         thread_t        startup_thread;
 120
 121         sched_init();
 122         vm_mem_bootstrap();
 123         ipc_bootstrap();
 124         vm_mem_init();
 125         ipc_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         task_init();
 155         thread_init();
 156
 157         /*
 158          *      Initialize the Event Trace Analysis Package.
 159          *      Dynamic Phase: 2 of 2
 160          */
 161         etap_init_phase2();
 162
 163         /*
 164          *      Create a kernel thread to start the other kernel
 165          *      threads.
 166          */
 167         startup_thread = kernel_thread_create(start_kernel_threads, MAXPRI_KERNEL);
 168
 169         /*
 170          * Start the thread.
 171          */
 172         startup_thread->state = TH_RUN;
 173         pset_run_incr(startup_thread->processor_set);
 174
 175         cpu_launch_first_thread(startup_thread);
 176         /*NOTREACHED*/
 177         panic("cpu_launch_first_thread returns!");
 178 }
 179
 180 /*
 181  * Now running in a thread.  Create the rest of the kernel threads
 182  * and the bootstrap task.
 183  */
 184 void
 185 start_kernel_threads(void)
 186 {
 187         register int                            i;
 188
 189         thread_bind(current_thread(), cpu_to_processor(cpu_number()));
 190
 191         /*
 192          *      Create the idle threads and the other
 193          *      service threads.
 194          */
 195         for (i = 0; i < NCPUS; i++) {
 196                 processor_t             processor = cpu_to_processor(i);
 197                 thread_t                thread;
 198                 spl_t                   s;
 199
 200                 thread = kernel_thread_create(idle_thread, MAXPRI_KERNEL);
 201
 202                 s = splsched();
 203                 thread_lock(thread);
 204                 thread->bound_processor = processor;
 205                 processor->idle_thread = thread;
 206                 thread->ref_count++;
 207                 thread->sched_pri = thread->priority = IDLEPRI;
 208                 thread->state = (TH_RUN | TH_IDLE);
 209                 thread_unlock(thread);
 210                 splx(s);
 211         }
 212
 213         /*
 214          * Initialize the thread reaper mechanism.
 215          */
 216         thread_reaper_init();
 217
 218         /*
 219          * Initialize the stack swapin mechanism.
 220          */
 221         swapin_init();
 222
 223         /*
 224          * Initialize the periodic scheduler mechanism.
 225          */
 226         sched_tick_init();
 227
 228         /*
 229          * Initialize the thread callout mechanism.
 230          */
 231         thread_call_initialize();
 232
 233         /*
 234          * Invoke some black magic.
 235          */
 236 #if __ppc__
 237         mapping_adjust();
 238 #endif
 239
 240         /*
 241          *      Create the clock service.
 242          */
 243         clock_service_create();
 244
 245         /*
 246          *      Create the device service.
 247          */
 248         device_service_create();
 249
 250         shared_file_boot_time_init(ENV_DEFAULT_ROOT, machine_slot[cpu_number()].cpu_type);
 251
 252 #ifdef  IOKIT
 253         {
 254                 PE_init_iokit();
 255         }
 256 #endif
 257
 258         (void) spllo();         /* Allow interruptions */
 259
 260     /*
 261      *  Fill in the comm area (mapped into every task address space.)
 262      */
 263     commpage_populate();
 264
 265         /*
 266          *      Start the user bootstrap.
 267          */
 268
 269 #ifdef  MACH_BSD
 270         {
 271                 extern void bsd_init(void);
 272                 bsd_init();
 273         }
 274 #endif
 275
 276 #if __ppc__
 277         serial_keyboard_init();         /* Start serial keyboard if wanted */
 278 #endif
 279
 280         thread_bind(current_thread(), PROCESSOR_NULL);
 281
 282         /*
 283          *      Become the pageout daemon.
 284          */
 285
 286         vm_pageout();
 287         /*NOTREACHED*/
 288 }
 289
 290 void
 291 slave_main(void)
 292 {
 293         processor_t             myprocessor = current_processor();
 294         thread_t                thread;
 295
 296         thread = myprocessor->next_thread;
 297         myprocessor->next_thread = THREAD_NULL;
 298         if (thread == THREAD_NULL) {
 299                 thread = machine_wake_thread;
 300                 machine_wake_thread = THREAD_NULL;
 301         }
 302
 303         cpu_launch_first_thread(thread);
 304         /*NOTREACHED*/
 305         panic("slave_main");
 306 }
 307
 308 /*
 309  * Now running in a thread context
 310  */
 311 void
 312 start_cpu_thread(void)
 313 {
 314         slave_machine_init();
 315
 316         (void) thread_terminate(current_act());
 317 }
 318
 319 /*
 320  *      Start up the first thread on a CPU.
 321  */
 322 void
 323 cpu_launch_first_thread(
 324         thread_t                thread)
 325 {
 326         register int    mycpu = cpu_number();
 327         processor_t             processor = cpu_to_processor(mycpu);
 328
 329         clock_get_uptime(&processor->last_dispatch);
 330         start_timer(&kernel_timer[mycpu]);
 331         machine_thread_set_current(thread);
 332         cpu_up(mycpu);
 333
 334         rtclock_reset();                /* start realtime clock ticking */
 335         PMAP_ACTIVATE_KERNEL(mycpu);
 336
 337         thread_lock(thread);
 338         thread->state &= ~TH_UNINT;
 339         thread->last_processor = processor;
 340         processor->active_thread = thread;
 341         processor->current_pri = thread->sched_pri;
 342         _mk_sp_thread_begin(thread, processor);
 343         thread_unlock(thread);
 344         timer_switch(&thread->system_timer);
 345
 346         PMAP_ACTIVATE_USER(thread->top_act, mycpu);
 347
 348         /* preemption enabled by load_context */
 349         machine_load_context(thread);
 350         /*NOTREACHED*/
 351 }