osfmk/i386/i386_init.c

   1 /*
   2  * Copyright (c) 2003 Apple Computer, Inc. All rights reserved.
   3  *
   4  * @APPLE_OSREFERENCE_LICENSE_HEADER_START@
   5  *
   6  * This file contains Original Code and/or Modifications of Original Code
   7  * as defined in and that are subject to the Apple Public Source License
   8  * Version 2.0 (the 'License'). You may not use this file except in
   9  * compliance with the License. The rights granted to you under the License
  10  * may not be used to create, or enable the creation or redistribution of,
  11  * unlawful or unlicensed copies of an Apple operating system, or to
  12  * circumvent, violate, or enable the circumvention or violation of, any
  13  * terms of an Apple operating system software license agreement.
  14  *
  15  * Please obtain a copy of the License at
  16  * http://www.opensource.apple.com/apsl/ and read it before using this file.
  17  *
  18  * The Original Code and all software distributed under the License are
  19  * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
  20  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
  21  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
  22  * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
  23  * Please see the License for the specific language governing rights and
  24  * limitations under the License.
  25  *
  26  * @APPLE_OSREFERENCE_LICENSE_HEADER_END@
  27  */
  28 /*
  29  * @OSF_COPYRIGHT@
  30  */
  31 /*
  32  * Mach Operating System
  33  * Copyright (c) 1991,1990,1989, 1988 Carnegie Mellon University
  34  * All Rights Reserved.
  35  *
  36  * Permission to use, copy, modify and distribute this software and its
  37  * documentation is hereby granted, provided that both the copyright
  38  * notice and this permission notice appear in all copies of the
  39  * software, derivative works or modified versions, and any portions
  40  * thereof, and that both notices appear in supporting documentation.
  41  *
  42  * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
  43  * CONDITION.  CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND FOR
  44  * ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
  45  *
  46  * Carnegie Mellon requests users of this software to return to
  47  *
  48  *  Software Distribution Coordinator  or  Software.Distribution@CS.CMU.EDU
  49  *  School of Computer Science
  50  *  Carnegie Mellon University
  51  *  Pittsburgh PA 15213-3890
  52  *
  53  * any improvements or extensions that they make and grant Carnegie Mellon
  54  * the rights to redistribute these changes.
  55  */
  56
  57 #include <platforms.h>
  58 #include <mach_kdb.h>
  59 #include <himem.h>
  60
  61 #include <mach/i386/vm_param.h>
  62
  63 #include <string.h>
  64 #include <mach/vm_param.h>
  65 #include <mach/vm_prot.h>
  66 #include <mach/machine.h>
  67 #include <mach/time_value.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/xpr.h>
  75 #include <kern/cpu_data.h>
  76 #include <kern/processor.h>
  77 #include <vm/vm_page.h>
  78 #include <vm/pmap.h>
  79 #include <vm/vm_kern.h>
  80 #include <i386/fpu.h>
  81 #include <i386/pmap.h>
  82 #include <i386/ipl.h>
  83 #include <i386/pio.h>
  84 #include <i386/misc_protos.h>
  85 #include <i386/cpuid.h>
  86 #include <i386/mp.h>
  87 #include <i386/machine_routines.h>
  88 #include <i386/postcode.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/thread_status.h>
  95
  96 static KernelBootArgs_t *kernelBootArgs;
  97 #endif
  98
  99 vm_offset_t     boot_args_start = 0;    /* pointer to kernel arguments, set in start.s */
 100
 101 #ifdef __MACHO__
 102 #include        <mach-o/loader.h>
 103 vm_offset_t     edata, etext, end;
 104
 105 /* operations only against currently loaded 32 bit mach kernel */
 106 extern struct segment_command *getsegbyname(const char *);
 107 extern struct section *firstsect(struct segment_command *);
 108 extern struct section *nextsect(struct segment_command *, struct section *);
 109
 110 /*
 111  * Called first for a mach-o kernel before paging is set up.
 112  * Returns the first available physical address in memory.
 113  */
 114
 115 void
 116 i386_preinit(void)
 117 {
 118         struct segment_command  *sgp;
 119         struct section          *sp;
 120         struct KernelBootArgs *pp;
 121         int i;
 122
 123         sgp = getsegbyname("__DATA");
 124         if (sgp) {
 125                 sp = firstsect(sgp);
 126                 if (sp) {
 127                         do {
 128                                 if ((sp->flags & S_ZEROFILL))
 129                                         bzero((char *) sp->addr, sp->size);
 130                         } while ((sp = nextsect(sgp, sp)));
 131                 }
 132         }
 133
 134         kernelBootArgs = (KernelBootArgs_t *)
 135                 ml_static_ptovirt(boot_args_start);
 136         pp = (struct KernelBootArgs *) kernelBootArgs;
 137         pp->configEnd = (char *)
 138                 ml_static_ptovirt((vm_offset_t) pp->configEnd);
 139         for (i = 0; i < pp->numBootDrivers; i++) {
 140                 pp->driverConfig[i].address = (unsigned)
 141                         ml_static_ptovirt(pp->driverConfig[i].address);
 142         }
 143         return;
 144 }
 145 #endif
 146
 147 extern const char version[];
 148 extern const char version_variant[];
 149
 150 /*
 151  *      Cpu initialization.  Running virtual, but without MACH VM
 152  *      set up.  First C routine called, unless i386_preinit() was called first.
 153  */
 154 void
 155 i386_init(void)
 156 {
 157         unsigned int    maxmem;
 158         unsigned int    cpus;
 159
 160         postcode(I386_INIT_ENTRY);
 161
 162         master_cpu = 0;
 163         cpu_data_alloc(TRUE);
 164         cpu_init();
 165         postcode(CPU_INIT_D);
 166
 167         /*
 168          * Setup some processor related structures to satisfy funnels.
 169          * Must be done before using unparallelized device drivers.
 170          */
 171         processor_bootstrap();
 172
 173         PE_init_platform(FALSE, kernelBootArgs);
 174         postcode(PE_INIT_PLATFORM_D);
 175
 176         /*
 177          * Set up initial thread so current_thread() works early on
 178          */
 179         thread_bootstrap();
 180         postcode(THREAD_BOOTSTRAP_D);
 181
 182         printf_init();                  /* Init this in case we need debugger */
 183         panic_init();                   /* Init this in case we need debugger */
 184
 185         /* setup debugging output if one has been chosen */
 186         PE_init_kprintf(FALSE);
 187
 188         /* setup console output */
 189         PE_init_printf(FALSE);
 190
 191         kprintf("version_variant = %s\n", version_variant);
 192         kprintf("version         = %s\n", version);
 193
 194         /*
 195          * VM initialization, after this we're using page tables...
 196          * The maximum number of cpus must be set beforehand.
 197          */
 198         if (!PE_parse_boot_arg("maxmem", &maxmem))
 199                 maxmem=0;
 200         else
 201                 maxmem = maxmem * (1024 * 1024);
 202
 203         if (PE_parse_boot_arg("cpus", &cpus)) {
 204                 if ((0 < cpus) && (cpus < max_ncpus))
 205                         max_ncpus = cpus;
 206         }
 207
 208         i386_vm_init(maxmem, kernelBootArgs);
 209
 210         PE_init_platform(TRUE, kernelBootArgs);
 211
 212         /* create the console for verbose or pretty mode */
 213         PE_create_console();
 214
 215         machine_startup();
 216
 217 }