osfmk/i386/i386_init.c

   1 /*
   2  * Copyright (c) 2003 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 #include <cpus.h>
  55 #include <platforms.h>
  56 #include <mach_kdb.h>
  57 #include <himem.h>
  58 #include <fast_idle.h>
  59
  60 #include <mach/i386/vm_param.h>
  61
  62 #include <string.h>
  63 #include <mach/vm_param.h>
  64 #include <mach/vm_prot.h>
  65 #include <mach/machine.h>
  66 #include <mach/time_value.h>
  67 #include <kern/etap_macros.h>
  68 #include <kern/spl.h>
  69 #include <kern/assert.h>
  70 #include <kern/debug.h>
  71 #include <kern/misc_protos.h>
  72 #include <kern/startup.h>
  73 #include <kern/clock.h>
  74 #include <kern/time_out.h>
  75 #include <kern/xpr.h>
  76 #include <kern/cpu_data.h>
  77 #include <kern/processor.h>
  78 #include <vm/vm_page.h>
  79 #include <vm/pmap.h>
  80 #include <vm/vm_kern.h>
  81 #include <i386/fpu.h>
  82 #include <i386/pmap.h>
  83 #include <i386/ipl.h>
  84 #include <i386/pio.h>
  85 #include <i386/misc_protos.h>
  86 #include <i386/cpuid.h>
  87 #include <i386/rtclock_entries.h>
  88 #include <i386/mp.h>
  89 #if     MACH_KDB
  90 #include <ddb/db_aout.h>
  91 #endif /* MACH_KDB */
  92 #include <ddb/tr.h>
  93 #ifdef __MACHO__
  94 #include <mach/boot_info.h>
  95 #include <mach/thread_status.h>
  96
  97 static KernelBootArgs_t *kernelBootArgs;
  98 #endif
  99
 100 vm_offset_t     boot_args_start = 0;    /* pointer to kernel arguments, set in start.s */
 101
 102 #ifdef __MACHO__
 103 #include        <mach-o/loader.h>
 104 vm_offset_t     edata, etext, end;
 105
 106 /*
 107  * Called first for a mach-o kernel before paging is set up.
 108  * Returns the first available physical address in memory.
 109  */
 110
 111 unsigned long
 112 i386_preinit()
 113 {
 114         struct segment_command  *sgp;
 115         struct section          *sp;
 116
 117         sgp = (struct segment_command *) getsegbyname("__DATA");
 118         if (sgp) {
 119                 sp = (struct section *) firstsect(sgp);
 120                 if (sp) {
 121                         do {
 122                                 if (sp->flags & S_ZEROFILL)
 123                                         bzero((char *) sp->addr, sp->size);
 124                         } while (sp = (struct section *)nextsect(sgp, sp));
 125                 }
 126         }
 127
 128         kernelBootArgs = (KernelBootArgs_t *) boot_args_start;
 129         end = round_page( kernelBootArgs->kaddr + kernelBootArgs->ksize );
 130
 131         return  end;
 132 }
 133 #endif
 134
 135 extern const char version[];
 136 extern const char version_variant[];
 137
 138 /*
 139  *      Cpu initialization.  Running virtual, but without MACH VM
 140  *      set up.  First C routine called, unless i386_preinit() was called first.
 141  */
 142 void
 143 i386_init(void)
 144 {
 145         unsigned int    maxmem;
 146
 147         cpu_init();
 148
 149         /*
 150          * Setup some processor related structures to satisfy funnels.
 151          * Must be done before using unparallelized device drivers.
 152          */
 153         processor_ptr[0] = &processor_array[0];
 154         master_cpu = 0;
 155         master_processor = cpu_to_processor(master_cpu);
 156
 157         PE_init_platform(FALSE, kernelBootArgs);
 158
 159         /*
 160          * Set up initial thread so current_thread() works early on
 161          */
 162         thread_bootstrap();
 163
 164         printf_init();                  /* Init this in case we need debugger */
 165         panic_init();                   /* Init this in case we need debugger */
 166
 167         /* setup debugging output if one has been chosen */
 168         PE_init_kprintf(FALSE);
 169         kprintf("kprintf initialized\n");
 170
 171         /* setup console output */
 172         PE_init_printf(FALSE);
 173
 174         kprintf("version_variant = %s\n", version_variant);
 175         kprintf("version         = %s\n", version);
 176
 177
 178         /*
 179          * VM initialization, after this we're using page tables...
 180          * The maximum number of cpus must be set beforehand.
 181          */
 182         if (!PE_parse_boot_arg("maxmem", &maxmem))
 183                 maxmem=0;
 184         else
 185                 maxmem = maxmem * (1024 * 1024);
 186
 187         if (PE_parse_boot_arg("cpus", &wncpu)) {
 188                 if (!((wncpu > 0) && (wncpu < NCPUS)))
 189                         wncpu = NCPUS;
 190         } else
 191                 wncpu = NCPUS;
 192
 193         i386_vm_init(maxmem, kernelBootArgs);
 194
 195         PE_init_platform(TRUE, kernelBootArgs);
 196
 197         /* create the console for verbose or pretty mode */
 198         PE_create_console();
 199
 200         machine_startup();
 201
 202 }