osfmk/i386/i386_init.c

   1 /*
   2  * Copyright (c) 2003-2008 Apple 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/locks.h> /* LcksOpts */
  95 #if     MACH_KDB
  96 #include <ddb/db_aout.h>
  97 #endif /* MACH_KDB */
  98 #include <ddb/tr.h>
  99
 100 static boot_args *kernelBootArgs;
 101
 102 int debug_task;
 103
 104 extern int disableConsoleOutput;
 105 extern const char version[];
 106 extern const char version_variant[];
 107 extern int nx_enabled;
 108
 109 extern int noVMX;       /* if set, rosetta should not emulate altivec */
 110
 111 /*
 112  *      Cpu initialization.  Running virtual, but without MACH VM
 113  *      set up.  First C routine called.
 114  */
 115 void
 116 i386_init(vm_offset_t boot_args_start)
 117 {
 118         unsigned int    maxmem;
 119         uint64_t        maxmemtouse;
 120         unsigned int    cpus;
 121         boolean_t       legacy_mode;
 122         boolean_t       fidn;
 123
 124         postcode(I386_INIT_ENTRY);
 125
 126         i386_macho_zerofill();
 127
 128         /* Initialize machine-check handling */
 129         mca_cpu_init();
 130
 131         /*
 132          * Setup boot args given the physical start address.
 133          */
 134         kernelBootArgs = (boot_args *)
 135                 ml_static_ptovirt(boot_args_start);
 136         kernelBootArgs->MemoryMap = (uint32_t)
 137                 ml_static_ptovirt((vm_offset_t)kernelBootArgs->MemoryMap);
 138         kernelBootArgs->deviceTreeP = (uint32_t)
 139                 ml_static_ptovirt((vm_offset_t)kernelBootArgs->deviceTreeP);
 140
 141         master_cpu = 0;
 142         (void) cpu_data_alloc(TRUE);
 143         cpu_init();
 144         postcode(CPU_INIT_D);
 145
 146         PE_init_platform(FALSE, kernelBootArgs);
 147         postcode(PE_INIT_PLATFORM_D);
 148
 149         printf_init();                  /* Init this in case we need debugger */
 150         panic_init();                   /* Init this in case we need debugger */
 151
 152         /* setup debugging output if one has been chosen */
 153         PE_init_kprintf(FALSE);
 154
 155         if (!PE_parse_boot_argn("diag", &dgWork.dgFlags, sizeof (dgWork.dgFlags)))
 156                 dgWork.dgFlags = 0;
 157
 158         serialmode = 0;
 159         if(PE_parse_boot_argn("serial", &serialmode, sizeof (serialmode))) {
 160                 /* We want a serial keyboard and/or console */
 161                 kprintf("Serial mode specified: %08X\n", serialmode);
 162         }
 163         if(serialmode & 1) {
 164                 (void)switch_to_serial_console();
 165                 disableConsoleOutput = FALSE;   /* Allow printfs to happen */
 166         }
 167
 168         /* setup console output */
 169         PE_init_printf(FALSE);
 170
 171         kprintf("version_variant = %s\n", version_variant);
 172         kprintf("version         = %s\n", version);
 173
 174         if (!PE_parse_boot_argn("maxmem", &maxmem, sizeof (maxmem)))
 175                 maxmemtouse = 0;
 176         else
 177                 maxmemtouse = ((uint64_t)maxmem) * (uint64_t)(1024 * 1024);
 178
 179         if (PE_parse_boot_argn("cpus", &cpus, sizeof (cpus))) {
 180                 if ((0 < cpus) && (cpus < max_ncpus))
 181                         max_ncpus = cpus;
 182         }
 183
 184         /*
 185          * debug support for > 4G systems
 186          */
 187         if (!PE_parse_boot_argn("himemory_mode", &vm_himemory_mode, sizeof (vm_himemory_mode)))
 188                 vm_himemory_mode = 0;
 189
 190         if (!PE_parse_boot_argn("immediate_NMI", &fidn, sizeof (fidn)))
 191                 force_immediate_debugger_NMI = FALSE;
 192         else
 193                 force_immediate_debugger_NMI = fidn;
 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_argn("-legacy", &legacy_mode, sizeof (legacy_mode))) {
 203                         kprintf(" but legacy mode forced\n");
 204                 } else {
 205                         IA32e = TRUE;
 206                         kprintf(" and will be enabled\n");
 207                 }
 208         }
 209
 210         if (!(cpuid_extfeatures() & CPUID_EXTFEATURE_XD))
 211                 nx_enabled = 0;
 212
 213         /* Obtain "lcks" options:this currently controls lock statistics */
 214         if (!PE_parse_boot_argn("lcks", &LcksOpts, sizeof (LcksOpts)))
 215                 LcksOpts = 0;
 216
 217         /*
 218          * VM initialization, after this we're using page tables...
 219          * The maximum number of cpus must be set beforehand.
 220          */
 221         i386_vm_init(maxmemtouse, IA32e, kernelBootArgs);
 222
 223         if ( ! PE_parse_boot_argn("novmx", &noVMX, sizeof (noVMX)))
 224                 noVMX = 0;      /* OK to support Altivec in rosetta? */
 225
 226         tsc_init();
 227         power_management_init();
 228
 229         PE_init_platform(TRUE, kernelBootArgs);
 230
 231         /* create the console for verbose or pretty mode */
 232         PE_create_console();
 233
 234         processor_bootstrap();
 235         thread_bootstrap();
 236
 237         machine_startup();
 238 }