osfmk/i386/i386_init.c

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