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 <platforms.h>
  52 #include <mach_kdb.h>
  53 #include <himem.h>
  54
  55 #include <mach/i386/vm_param.h>
  56
  57 #include <string.h>
  58 #include <mach/vm_param.h>
  59 #include <mach/vm_prot.h>
  60 #include <mach/machine.h>
  61 #include <mach/time_value.h>
  62 #include <kern/spl.h>
  63 #include <kern/assert.h>
  64 #include <kern/debug.h>
  65 #include <kern/misc_protos.h>
  66 #include <kern/startup.h>
  67 #include <kern/clock.h>
  68 #include <kern/xpr.h>
  69 #include <kern/cpu_data.h>
  70 #include <kern/processor.h>
  71 #include <vm/vm_page.h>
  72 #include <vm/pmap.h>
  73 #include <vm/vm_kern.h>
  74 #include <i386/fpu.h>
  75 #include <i386/pmap.h>
  76 #include <i386/ipl.h>
  77 #include <i386/pio.h>
  78 #include <i386/misc_protos.h>
  79 #include <i386/cpuid.h>
  80 #include <i386/mp.h>
  81 #include <i386/machine_routines.h>
  82 #include <i386/postcode.h>
  83 #if     MACH_KDB
  84 #include <ddb/db_aout.h>
  85 #endif /* MACH_KDB */
  86 #include <ddb/tr.h>
  87 #ifdef __MACHO__
  88 #include <mach/thread_status.h>
  89
  90 static KernelBootArgs_t *kernelBootArgs;
  91 #endif
  92
  93 vm_offset_t     boot_args_start = 0;    /* pointer to kernel arguments, set in start.s */
  94
  95 #ifdef __MACHO__
  96 #include        <mach-o/loader.h>
  97 vm_offset_t     edata, etext, end;
  98
  99 /* operations only against currently loaded 32 bit mach kernel */
 100 extern struct segment_command *getsegbyname(const char *);
 101 extern struct section *firstsect(struct segment_command *);
 102 extern struct section *nextsect(struct segment_command *, struct section *);
 103
 104 /*
 105  * Called first for a mach-o kernel before paging is set up.
 106  * Returns the first available physical address in memory.
 107  */
 108
 109 void
 110 i386_preinit(void)
 111 {
 112         struct segment_command  *sgp;
 113         struct section          *sp;
 114         struct KernelBootArgs *pp;
 115         int i;
 116
 117         sgp = getsegbyname("__DATA");
 118         if (sgp) {
 119                 sp = firstsect(sgp);
 120                 if (sp) {
 121                         do {
 122                                 if ((sp->flags & S_ZEROFILL))
 123                                         bzero((char *) sp->addr, sp->size);
 124                         } while ((sp = nextsect(sgp, sp)));
 125                 }
 126         }
 127
 128         kernelBootArgs = (KernelBootArgs_t *)
 129                 ml_static_ptovirt(boot_args_start);
 130         pp = (struct KernelBootArgs *) kernelBootArgs;
 131         pp->configEnd = (char *)
 132                 ml_static_ptovirt((vm_offset_t) pp->configEnd);
 133         for (i = 0; i < pp->numBootDrivers; i++) {
 134                 pp->driverConfig[i].address = (unsigned)
 135                         ml_static_ptovirt(pp->driverConfig[i].address);
 136         }
 137         return;
 138 }
 139 #endif
 140
 141 extern const char version[];
 142 extern const char version_variant[];
 143
 144 /*
 145  *      Cpu initialization.  Running virtual, but without MACH VM
 146  *      set up.  First C routine called, unless i386_preinit() was called first.
 147  */
 148 void
 149 i386_init(void)
 150 {
 151         unsigned int    maxmem;
 152         unsigned int    cpus;
 153
 154         postcode(I386_INIT_ENTRY);
 155
 156         master_cpu = 0;
 157         cpu_data_alloc(TRUE);
 158         cpu_init();
 159         postcode(CPU_INIT_D);
 160
 161         /*
 162          * Setup some processor related structures to satisfy funnels.
 163          * Must be done before using unparallelized device drivers.
 164          */
 165         processor_bootstrap();
 166
 167         PE_init_platform(FALSE, kernelBootArgs);
 168         postcode(PE_INIT_PLATFORM_D);
 169
 170         /*
 171          * Set up initial thread so current_thread() works early on
 172          */
 173         thread_bootstrap();
 174         postcode(THREAD_BOOTSTRAP_D);
 175
 176         printf_init();                  /* Init this in case we need debugger */
 177         panic_init();                   /* Init this in case we need debugger */
 178
 179         /* setup debugging output if one has been chosen */
 180         PE_init_kprintf(FALSE);
 181
 182         /* setup console output */
 183         PE_init_printf(FALSE);
 184
 185         kprintf("version_variant = %s\n", version_variant);
 186         kprintf("version         = %s\n", version);
 187
 188         /*
 189          * VM initialization, after this we're using page tables...
 190          * The maximum number of cpus must be set beforehand.
 191          */
 192         if (!PE_parse_boot_arg("maxmem", &maxmem))
 193                 maxmem=0;
 194         else
 195                 maxmem = maxmem * (1024 * 1024);
 196
 197         if (PE_parse_boot_arg("cpus", &cpus)) {
 198                 if ((0 < cpus) && (cpus < max_ncpus))
 199                         max_ncpus = cpus;
 200         }
 201
 202         i386_vm_init(maxmem, kernelBootArgs);
 203
 204         PE_init_platform(TRUE, kernelBootArgs);
 205
 206         /* create the console for verbose or pretty mode */
 207         PE_create_console();
 208
 209         machine_startup();
 210
 211 }