osfmk/i386/i386_init.c

   1 /*
   2  * Copyright (c) 2003-2006 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
  60 #include <mach/i386/vm_param.h>
  61
  62 #include <string.h>
  63 #include <mach/vm_param.h>
  64 #include <mach/vm_prot.h>
  65 #include <mach/machine.h>
  66 #include <mach/time_value.h>
  67 #include <kern/spl.h>
  68 #include <kern/assert.h>
  69 #include <kern/debug.h>
  70 #include <kern/misc_protos.h>
  71 #include <kern/startup.h>
  72 #include <kern/clock.h>
  73 #include <kern/pms.h>
  74 #include <kern/xpr.h>
  75 #include <kern/cpu_data.h>
  76 #include <kern/processor.h>
  77 #include <console/serial_protos.h>
  78 #include <vm/vm_page.h>
  79 #include <vm/pmap.h>
  80 #include <vm/vm_kern.h>
  81 #include <i386/fpu.h>
  82 #include <i386/pmap.h>
  83 #include <i386/ipl.h>
  84 #include <i386/misc_protos.h>
  85 #include <i386/cpuid.h>
  86 #include <i386/mp.h>
  87 #include <i386/mp_desc.h>
  88 #include <i386/machine_routines.h>
  89 #include <i386/machine_check.h>
  90 #include <i386/postcode.h>
  91 #include <i386/Diagnostics.h>
  92 #include <i386/pmCPU.h>
  93 #include <i386/tsc.h>
  94 #include <i386/hpet.h>
  95 #include <i386/locks.h> /* LcksOpts */
  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 int debug_task;
 104
 105 extern int disableConsoleOutput;
 106 extern const char version[];
 107 extern const char version_variant[];
 108 extern int nx_enabled;
 109
 110 extern int noVMX;       /* if set, rosetta should not emulate altivec */
 111
 112 /*
 113  *      Cpu initialization.  Running virtual, but without MACH VM
 114  *      set up.  First C routine called.
 115  */
 116 void
 117 i386_init(vm_offset_t boot_args_start)
 118 {
 119         unsigned int    maxmem;
 120         uint64_t        maxmemtouse;
 121         unsigned int    cpus;
 122         boolean_t       legacy_mode;
 123         boolean_t       fidn;
 124
 125         postcode(I386_INIT_ENTRY);
 126
 127         i386_macho_zerofill();
 128
 129         /* Initialize machine-check handling */
 130         mca_cpu_init();
 131
 132         /*
 133          * Setup boot args given the physical start address.
 134          */
 135         kernelBootArgs = (boot_args *)
 136                 ml_static_ptovirt(boot_args_start);
 137         kernelBootArgs->MemoryMap = (uint32_t)
 138                 ml_static_ptovirt((vm_offset_t)kernelBootArgs->MemoryMap);
 139         kernelBootArgs->deviceTreeP = (uint32_t)
 140                 ml_static_ptovirt((vm_offset_t)kernelBootArgs->deviceTreeP);
 141
 142         master_cpu = 0;
 143         (void) cpu_data_alloc(TRUE);
 144         cpu_init();
 145         postcode(CPU_INIT_D);
 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         if (!PE_parse_boot_arg("maxmem", &maxmem))
 176                 maxmemtouse=0;
 177         else
 178                 maxmemtouse = ((uint64_t)maxmem) * (uint64_t)(1024 * 1024);
 179
 180         if (PE_parse_boot_arg("cpus", &cpus)) {
 181                 if ((0 < cpus) && (cpus < max_ncpus))
 182                         max_ncpus = cpus;
 183         }
 184
 185         /*
 186          * debug support for > 4G systems
 187          */
 188         if (!PE_parse_boot_arg("himemory_mode", &vm_himemory_mode))
 189                 vm_himemory_mode = 0;
 190
 191         if (!PE_parse_boot_argn("immediate_NMI", &fidn, sizeof (fidn)))
 192                 force_immediate_debugger_NMI = FALSE;
 193         else
 194                 force_immediate_debugger_NMI = fidn;
 195
 196         /*
 197          * At this point we check whether we are a 64-bit processor
 198          * and that we're not restricted to legacy mode, 32-bit operation.
 199          */
 200         boolean_t IA32e = FALSE;
 201         if (cpuid_extfeatures() & CPUID_EXTFEATURE_EM64T) {
 202                 kprintf("EM64T supported");
 203                 if (PE_parse_boot_arg("-legacy", &legacy_mode)) {
 204                         kprintf(" but legacy mode forced\n");
 205                 } else {
 206                         IA32e = TRUE;
 207                         kprintf(" and will be enabled\n");
 208                 }
 209         }
 210
 211         if (!(cpuid_extfeatures() & CPUID_EXTFEATURE_XD))
 212                 nx_enabled = 0;
 213
 214         /* Obtain "lcks" options:this currently controls lock statistics */
 215         if (!PE_parse_boot_arg("lcks", &LcksOpts))
 216                 LcksOpts = 0;
 217
 218         /*
 219          * VM initialization, after this we're using page tables...
 220          * The maximum number of cpus must be set beforehand.
 221          */
 222         i386_vm_init(maxmemtouse, IA32e, kernelBootArgs);
 223
 224         if ( ! PE_parse_boot_arg("novmx", &noVMX))
 225                 noVMX = 0;      /* OK to support Altivec in rosetta? */
 226
 227         tsc_init();
 228         hpet_init();
 229         power_management_init();
 230
 231         PE_init_platform(TRUE, kernelBootArgs);
 232
 233         /* create the console for verbose or pretty mode */
 234         PE_create_console();
 235
 236         processor_bootstrap();
 237         thread_bootstrap();
 238
 239         machine_startup();
 240 }