FreeBSD/Linux Kernel Cross Reference
sys/osfmk/i386/i386_init.c

     /*
      * Copyright (c) 2003 Apple Computer, Inc. All rights reserved.
      *
      * @APPLE_LICENSE_HEADER_START@
      * 
      * Copyright (c) 1999-2003 Apple Computer, Inc.  All Rights Reserved.
      * 
      * This file contains Original Code and/or Modifications of Original Code
      * as defined in and that are subject to the Apple Public Source License
     * Version 2.0 (the 'License'). You may not use this file except in
     * compliance with the License. Please obtain a copy of the License at
     * http://www.opensource.apple.com/apsl/ and read it before using this
     * file.
     * 
     * The Original Code and all software distributed under the License are
     * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
     * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
     * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
     * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
     * Please see the License for the specific language governing rights and
     * limitations under the License.
     * 
     * @APPLE_LICENSE_HEADER_END@
     */
    /*
     * @OSF_COPYRIGHT@
     */
    /* 
     * Mach Operating System
     * Copyright (c) 1991,1990,1989, 1988 Carnegie Mellon University
     * All Rights Reserved.
     * 
     * Permission to use, copy, modify and distribute this software and its
     * documentation is hereby granted, provided that both the copyright
     * notice and this permission notice appear in all copies of the
     * software, derivative works or modified versions, and any portions
     * thereof, and that both notices appear in supporting documentation.
     * 
     * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
     * CONDITION.  CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND FOR
     * ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
     * 
     * Carnegie Mellon requests users of this software to return to
     * 
     *  Software Distribution Coordinator  or  Software.Distribution@CS.CMU.EDU
     *  School of Computer Science
     *  Carnegie Mellon University
     *  Pittsburgh PA 15213-3890
     * 
     * any improvements or extensions that they make and grant Carnegie Mellon
     * the rights to redistribute these changes.
     */
    
    #include <cpus.h>
    #include <platforms.h>
    #include <mach_kdb.h>
    #include <himem.h>
    #include <fast_idle.h>
    
    #include <mach/i386/vm_param.h>
    
    #include <string.h>
    #include <mach/vm_param.h>
    #include <mach/vm_prot.h>
    #include <mach/machine.h>
    #include <mach/time_value.h>
    #include <kern/etap_macros.h>
    #include <kern/spl.h>
    #include <kern/assert.h>
    #include <kern/debug.h>
    #include <kern/misc_protos.h>
    #include <kern/startup.h>
    #include <kern/clock.h>
    #include <kern/time_out.h>
    #include <kern/xpr.h>
    #include <kern/cpu_data.h>
    #include <kern/processor.h>
    #include <vm/vm_page.h>
    #include <vm/pmap.h>
    #include <vm/vm_kern.h>
    #include <i386/fpu.h>
    #include <i386/pmap.h>
    #include <i386/ipl.h>
    #include <i386/pio.h>
    #include <i386/misc_protos.h>
    #include <i386/cpuid.h>
    #include <i386/rtclock_entries.h>
    #include <i386/mp.h>
    #if     MACH_KDB
    #include <ddb/db_aout.h>
    #endif /* MACH_KDB */
    #include <ddb/tr.h>
    #ifdef __MACHO__
    #include <mach/boot_info.h>
    #include <mach/thread_status.h>
    
    static KernelBootArgs_t *kernelBootArgs;
    #endif
    
   vm_offset_t     boot_args_start = 0;    /* pointer to kernel arguments, set in start.s */
   
   #ifdef __MACHO__
   #include        <mach-o/loader.h>
   vm_offset_t     edata, etext, end;
   
   /*
    * Called first for a mach-o kernel before paging is set up.
    * Returns the first available physical address in memory.
    */
   
   unsigned long
   i386_preinit()
   {
           struct segment_command  *sgp;
           struct section          *sp;
   
           sgp = (struct segment_command *) getsegbyname("__DATA");
           if (sgp) {
                   sp = (struct section *) firstsect(sgp);
                   if (sp) {
                           do {
                                   if (sp->flags & S_ZEROFILL)
                                           bzero((char *) sp->addr, sp->size);
                           } while (sp = (struct section *)nextsect(sgp, sp));
                   }
           }
   
           kernelBootArgs = (KernelBootArgs_t *) boot_args_start;
           end = round_page( kernelBootArgs->kaddr + kernelBootArgs->ksize );
   
           return  end;
   }
   #endif
   
   extern const char version[];
   extern const char version_variant[];
   
   /*
    *      Cpu initialization.  Running virtual, but without MACH VM
    *      set up.  First C routine called, unless i386_preinit() was called first.
    */
   void
   i386_init(void)
   {
           unsigned int    maxmem;
   
           cpu_init();
   
           /*
            * Setup some processor related structures to satisfy funnels.
            * Must be done before using unparallelized device drivers.
            */
           processor_ptr[0] = &processor_array[0];
           master_cpu = 0;
           master_processor = cpu_to_processor(master_cpu);
   
           PE_init_platform(FALSE, kernelBootArgs);
   
           /*
            * Set up initial thread so current_thread() works early on
            */
           thread_bootstrap();
   
           printf_init();                  /* Init this in case we need debugger */
           panic_init();                   /* Init this in case we need debugger */
   
           /* setup debugging output if one has been chosen */
           PE_init_kprintf(FALSE);
           kprintf("kprintf initialized\n");
   
           /* setup console output */
           PE_init_printf(FALSE);
   
           kprintf("version_variant = %s\n", version_variant);
           kprintf("version         = %s\n", version);
   
   
           /*   
            * VM initialization, after this we're using page tables...
            * The maximum number of cpus must be set beforehand.
            */
           if (!PE_parse_boot_arg("maxmem", &maxmem))
                   maxmem=0;
           else
                   maxmem = maxmem * (1024 * 1024);
   
           if (PE_parse_boot_arg("cpus", &wncpu)) {
                   if (!((wncpu > 0) && (wncpu < NCPUS)))
                           wncpu = NCPUS;
           } else 
                   wncpu = NCPUS;
   
           i386_vm_init(maxmem, kernelBootArgs);
   
           PE_init_platform(TRUE, kernelBootArgs);
   
           /* create the console for verbose or pretty mode */
           PE_create_console();
           
           machine_startup();
   
   }

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