osfmk/i386/i386_init.c

   1 /*
   2  * Copyright (c) 2003-2005 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
  62 #include <mach/i386/vm_param.h>
  63
  64 #include <string.h>
  65 #include <mach/vm_param.h>
  66 #include <mach/vm_prot.h>
  67 #include <mach/machine.h>
  68 #include <mach/time_value.h>
  69 #include <kern/spl.h>
  70 #include <kern/assert.h>
  71 #include <kern/debug.h>
  72 #include <kern/misc_protos.h>
  73 #include <kern/startup.h>
  74 #include <kern/clock.h>
  75 #include <kern/pms.h>
  76 #include <kern/xpr.h>
  77 #include <kern/cpu_data.h>
  78 #include <kern/processor.h>
  79 #include <console/serial_protos.h>
  80 #include <vm/vm_page.h>
  81 #include <vm/pmap.h>
  82 #include <vm/vm_kern.h>
  83 #include <i386/fpu.h>
  84 #include <i386/pmap.h>
  85 #include <i386/ipl.h>
  86 #include <i386/misc_protos.h>
  87 #include <i386/cpuid.h>
  88 #include <i386/mp.h>
  89 #include <i386/mp_desc.h>
  90 #include <i386/machine_routines.h>
  91 #include <i386/postcode.h>
  92 #include <i386/Diagnostics.h>
  93 #include <i386/pmCPU.h>
  94 #include <i386/tsc.h>
  95 #include <i386/hpet.h>
  96 #if     MACH_KDB
  97 #include <ddb/db_aout.h>
  98 #endif /* MACH_KDB */
  99 #include <ddb/tr.h>
 100
 101 static boot_args *kernelBootArgs;
 102
 103 extern int disableConsoleOutput;
 104 extern const char version[];
 105 extern const char version_variant[];
 106 extern int nx_enabled;
 107
 108 extern int noVMX;       /* if set, rosetta should not emulate altivec */
 109
 110 void cpu_stack_set(void);
 111
 112
 113 /*
 114  *      Cpu initialization.  Running virtual, but without MACH VM
 115  *      set up.  First C routine called.
 116  */
 117 void
 118 i386_init(vm_offset_t boot_args_start)
 119 {
 120         unsigned int    maxmem;
 121         uint64_t        maxmemtouse;
 122         unsigned int    cpus;
 123         boolean_t       legacy_mode;
 124
 125         postcode(I386_INIT_ENTRY);
 126
 127         i386_macho_zerofill();
 128
 129         /*
 130          * Setup boot args given the physical start address.
 131          */
 132         kernelBootArgs = (boot_args *)
 133                 ml_static_ptovirt(boot_args_start);
 134         kernelBootArgs->MemoryMap = (uint32_t)
 135                 ml_static_ptovirt((vm_offset_t)kernelBootArgs->MemoryMap);
 136         kernelBootArgs->deviceTreeP = (uint32_t)
 137                 ml_static_ptovirt((vm_offset_t)kernelBootArgs->deviceTreeP);
 138
 139         master_cpu = 0;
 140         (void) cpu_data_alloc(TRUE);
 141         cpu_init();
 142         postcode(CPU_INIT_D);
 143
 144         /* init processor performance control */
 145         pmsInit();
 146
 147         PE_init_platform(FALSE, kernelBootArgs);
 148         postcode(PE_INIT_PLATFORM_D);
 149
 150         printf_init();                  /* Init this in case we need debugger */
 151         panic_init();                   /* Init this in case we need debugger */
 152
 153         /* setup debugging output if one has been chosen */
 154         PE_init_kprintf(FALSE);
 155
 156         if (!PE_parse_boot_arg("diag", &dgWork.dgFlags))
 157                 dgWork.dgFlags = 0;
 158
 159         serialmode = 0;
 160         if(PE_parse_boot_arg("serial", &serialmode)) {
 161                 /* We want a serial keyboard and/or console */
 162                 kprintf("Serial mode specified: %08X\n", serialmode);
 163         }
 164         if(serialmode & 1) {
 165                 (void)switch_to_serial_console();
 166                 disableConsoleOutput = FALSE;   /* Allow printfs to happen */
 167         }
 168
 169         /* setup console output */
 170         PE_init_printf(FALSE);
 171
 172         kprintf("version_variant = %s\n", version_variant);
 173         kprintf("version         = %s\n", version);
 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                 maxmemtouse=0;
 181         else
 182                 maxmemtouse = ((uint64_t)maxmem) * (uint64_t)(1024 * 1024);
 183
 184         if (PE_parse_boot_arg("cpus", &cpus)) {
 185                 if ((0 < cpus) && (cpus < max_ncpus))
 186                         max_ncpus = cpus;
 187         }
 188
 189         /*
 190          * debug support for > 4G systems
 191          */
 192         if (!PE_parse_boot_arg("himemory_mode", &vm_himemory_mode))
 193                 vm_himemory_mode = 0;
 194
 195         /*
 196          * At this point we check whether we are a 64-bit processor
 197          * and that we're not restricted to legacy mode, 32-bit operation.
 198          */
 199         boolean_t IA32e = FALSE;
 200         if (cpuid_extfeatures() & CPUID_EXTFEATURE_EM64T) {
 201                 kprintf("EM64T supported");
 202                 if (PE_parse_boot_arg("-legacy", &legacy_mode)) {
 203                         kprintf(" but legacy mode forced\n");
 204                 } else {
 205                         IA32e = TRUE;
 206                         kprintf(" and will be enabled\n");
 207                 }
 208         }
 209         if (!(cpuid_extfeatures() & CPUID_EXTFEATURE_XD))
 210                 nx_enabled = 0;
 211
 212         i386_vm_init(maxmemtouse, IA32e, kernelBootArgs);
 213
 214         if ( ! PE_parse_boot_arg("novmx", &noVMX))
 215                 noVMX = 0;      /* OK to support Altivec in rosetta? */
 216
 217         tsc_init();
 218         hpet_init();
 219         power_management_init();
 220
 221         PE_init_platform(TRUE, kernelBootArgs);
 222
 223         /* create the console for verbose or pretty mode */
 224         PE_create_console();
 225
 226         processor_bootstrap();
 227         thread_bootstrap();
 228
 229         machine_startup();
 230
 231 }