osfmk/i386/i386_init.c

   1 /*
   2  * Copyright (c) 2003 Apple Computer, Inc. All rights reserved.
   3  *
   4  * @APPLE_LICENSE_OSREFERENCE_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
  10  * License may not be used to create, or enable the creation or
  11  * redistribution of, unlawful or unlicensed copies of an Apple operating
  12  * system, or to circumvent, violate, or enable the circumvention or
  13  * violation of, any terms of an Apple operating system software license
  14  * agreement.
  15  *
  16  * Please obtain a copy of the License at
  17  * http://www.opensource.apple.com/apsl/ and read it before using this
  18  * file.
  19  *
  20  * The Original Code and all software distributed under the License are
  21  * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
  22  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
  23  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
  24  * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
  25  * Please see the License for the specific language governing rights and
  26  * limitations under the License.
  27  *
  28  * @APPLE_LICENSE_OSREFERENCE_HEADER_END@
  29  */
  30 /*
  31  * @OSF_COPYRIGHT@
  32  */
  33 /*
  34  * Mach Operating System
  35  * Copyright (c) 1991,1990,1989, 1988 Carnegie Mellon University
  36  * All Rights Reserved.
  37  *
  38  * Permission to use, copy, modify and distribute this software and its
  39  * documentation is hereby granted, provided that both the copyright
  40  * notice and this permission notice appear in all copies of the
  41  * software, derivative works or modified versions, and any portions
  42  * thereof, and that both notices appear in supporting documentation.
  43  *
  44  * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
  45  * CONDITION.  CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND FOR
  46  * ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
  47  *
  48  * Carnegie Mellon requests users of this software to return to
  49  *
  50  *  Software Distribution Coordinator  or  Software.Distribution@CS.CMU.EDU
  51  *  School of Computer Science
  52  *  Carnegie Mellon University
  53  *  Pittsburgh PA 15213-3890
  54  *
  55  * any improvements or extensions that they make and grant Carnegie Mellon
  56  * the rights to redistribute these changes.
  57  */
  58
  59 #include <platforms.h>
  60 #include <mach_kdb.h>
  61 #include <himem.h>
  62
  63 #include <mach/i386/vm_param.h>
  64
  65 #include <string.h>
  66 #include <mach/vm_param.h>
  67 #include <mach/vm_prot.h>
  68 #include <mach/machine.h>
  69 #include <mach/time_value.h>
  70 #include <kern/spl.h>
  71 #include <kern/assert.h>
  72 #include <kern/debug.h>
  73 #include <kern/misc_protos.h>
  74 #include <kern/startup.h>
  75 #include <kern/clock.h>
  76 #include <kern/xpr.h>
  77 #include <kern/cpu_data.h>
  78 #include <kern/processor.h>
  79 #include <vm/vm_page.h>
  80 #include <vm/pmap.h>
  81 #include <vm/vm_kern.h>
  82 #include <i386/fpu.h>
  83 #include <i386/pmap.h>
  84 #include <i386/ipl.h>
  85 #include <i386/pio.h>
  86 #include <i386/misc_protos.h>
  87 #include <i386/cpuid.h>
  88 #include <i386/mp.h>
  89 #include <i386/machine_routines.h>
  90 #include <i386/postcode.h>
  91 #if     MACH_KDB
  92 #include <ddb/db_aout.h>
  93 #endif /* MACH_KDB */
  94 #include <ddb/tr.h>
  95 #ifdef __MACHO__
  96 #include <mach/thread_status.h>
  97
  98 static KernelBootArgs_t *kernelBootArgs;
  99 #endif
 100
 101 vm_offset_t     boot_args_start = 0;    /* pointer to kernel arguments, set in start.s */
 102
 103 #ifdef __MACHO__
 104 #include        <mach-o/loader.h>
 105 vm_offset_t     edata, etext, end;
 106
 107 /* operations only against currently loaded 32 bit mach kernel */
 108 extern struct segment_command *getsegbyname(const char *);
 109 extern struct section *firstsect(struct segment_command *);
 110 extern struct section *nextsect(struct segment_command *, struct section *);
 111
 112 /*
 113  * Called first for a mach-o kernel before paging is set up.
 114  * Returns the first available physical address in memory.
 115  */
 116
 117 void
 118 i386_preinit(void)
 119 {
 120         struct segment_command  *sgp;
 121         struct section          *sp;
 122         struct KernelBootArgs *pp;
 123         int i;
 124
 125         sgp = getsegbyname("__DATA");
 126         if (sgp) {
 127                 sp = firstsect(sgp);
 128                 if (sp) {
 129                         do {
 130                                 if ((sp->flags & S_ZEROFILL))
 131                                         bzero((char *) sp->addr, sp->size);
 132                         } while ((sp = nextsect(sgp, sp)));
 133                 }
 134         }
 135
 136         kernelBootArgs = (KernelBootArgs_t *)
 137                 ml_static_ptovirt(boot_args_start);
 138         pp = (struct KernelBootArgs *) kernelBootArgs;
 139         pp->configEnd = (char *)
 140                 ml_static_ptovirt((vm_offset_t) pp->configEnd);
 141         for (i = 0; i < pp->numBootDrivers; i++) {
 142                 pp->driverConfig[i].address = (unsigned)
 143                         ml_static_ptovirt(pp->driverConfig[i].address);
 144         }
 145         return;
 146 }
 147 #endif
 148
 149 extern const char version[];
 150 extern const char version_variant[];
 151
 152 /*
 153  *      Cpu initialization.  Running virtual, but without MACH VM
 154  *      set up.  First C routine called, unless i386_preinit() was called first.
 155  */
 156 void
 157 i386_init(void)
 158 {
 159         unsigned int    maxmem;
 160         unsigned int    cpus;
 161
 162         postcode(I386_INIT_ENTRY);
 163
 164         master_cpu = 0;
 165         cpu_data_alloc(TRUE);
 166         cpu_init();
 167         postcode(CPU_INIT_D);
 168
 169         /*
 170          * Setup some processor related structures to satisfy funnels.
 171          * Must be done before using unparallelized device drivers.
 172          */
 173         processor_bootstrap();
 174
 175         PE_init_platform(FALSE, kernelBootArgs);
 176         postcode(PE_INIT_PLATFORM_D);
 177
 178         /*
 179          * Set up initial thread so current_thread() works early on
 180          */
 181         thread_bootstrap();
 182         postcode(THREAD_BOOTSTRAP_D);
 183
 184         printf_init();                  /* Init this in case we need debugger */
 185         panic_init();                   /* Init this in case we need debugger */
 186
 187         /* setup debugging output if one has been chosen */
 188         PE_init_kprintf(FALSE);
 189
 190         /* setup console output */
 191         PE_init_printf(FALSE);
 192
 193         kprintf("version_variant = %s\n", version_variant);
 194         kprintf("version         = %s\n", version);
 195
 196         /*
 197          * VM initialization, after this we're using page tables...
 198          * The maximum number of cpus must be set beforehand.
 199          */
 200         if (!PE_parse_boot_arg("maxmem", &maxmem))
 201                 maxmem=0;
 202         else
 203                 maxmem = maxmem * (1024 * 1024);
 204
 205         if (PE_parse_boot_arg("cpus", &cpus)) {
 206                 if ((0 < cpus) && (cpus < max_ncpus))
 207                         max_ncpus = cpus;
 208         }
 209
 210         i386_vm_init(maxmem, kernelBootArgs);
 211
 212         PE_init_platform(TRUE, kernelBootArgs);
 213
 214         /* create the console for verbose or pretty mode */
 215         PE_create_console();
 216
 217         machine_startup();
 218
 219 }