osfmk/i386/i386_init.c

   1 /*
   2  * Copyright (c) 2003-2005 Apple Computer, Inc. All rights reserved.
   3  *
   4  * @APPLE_LICENSE_HEADER_START@
   5  *
   6  * The contents of this file constitute Original Code as defined in and
   7  * are subject to the Apple Public Source License Version 1.1 (the
   8  * "License").  You may not use this file except in compliance with the
   9  * License.  Please obtain a copy of the License at
  10  * http://www.apple.com/publicsource and read it before using this file.
  11  *
  12  * This Original Code and all software distributed under the License are
  13  * distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, EITHER
  14  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
  15  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
  16  * FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT.  Please see the
  17  * License for the specific language governing rights and limitations
  18  * under the License.
  19  *
  20  * @APPLE_LICENSE_HEADER_END@
  21  */
  22 /*
  23  * @OSF_COPYRIGHT@
  24  */
  25 /*
  26  * Mach Operating System
  27  * Copyright (c) 1991,1990,1989, 1988 Carnegie Mellon University
  28  * All Rights Reserved.
  29  *
  30  * Permission to use, copy, modify and distribute this software and its
  31  * documentation is hereby granted, provided that both the copyright
  32  * notice and this permission notice appear in all copies of the
  33  * software, derivative works or modified versions, and any portions
  34  * thereof, and that both notices appear in supporting documentation.
  35  *
  36  * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
  37  * CONDITION.  CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND FOR
  38  * ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
  39  *
  40  * Carnegie Mellon requests users of this software to return to
  41  *
  42  *  Software Distribution Coordinator  or  Software.Distribution@CS.CMU.EDU
  43  *  School of Computer Science
  44  *  Carnegie Mellon University
  45  *  Pittsburgh PA 15213-3890
  46  *
  47  * any improvements or extensions that they make and grant Carnegie Mellon
  48  * the rights to redistribute these changes.
  49  */
  50
  51 #include <platforms.h>
  52 #include <mach_kdb.h>
  53
  54 #include <mach/i386/vm_param.h>
  55
  56 #include <string.h>
  57 #include <mach/vm_param.h>
  58 #include <mach/vm_prot.h>
  59 #include <mach/machine.h>
  60 #include <mach/time_value.h>
  61 #include <kern/spl.h>
  62 #include <kern/assert.h>
  63 #include <kern/debug.h>
  64 #include <kern/misc_protos.h>
  65 #include <kern/startup.h>
  66 #include <kern/clock.h>
  67 #include <kern/pms.h>
  68 #include <kern/xpr.h>
  69 #include <kern/cpu_data.h>
  70 #include <kern/processor.h>
  71 #include <console/serial_protos.h>
  72 #include <vm/vm_page.h>
  73 #include <vm/pmap.h>
  74 #include <vm/vm_kern.h>
  75 #include <i386/fpu.h>
  76 #include <i386/pmap.h>
  77 #include <i386/ipl.h>
  78 #include <i386/misc_protos.h>
  79 #include <i386/cpuid.h>
  80 #include <i386/mp.h>
  81 #include <i386/mp_desc.h>
  82 #include <i386/machine_routines.h>
  83 #include <i386/postcode.h>
  84 #include <i386/Diagnostics.h>
  85 #include <i386/pmCPU.h>
  86 #include <i386/tsc.h>
  87 #include <i386/hpet.h>
  88 #if     MACH_KDB
  89 #include <ddb/db_aout.h>
  90 #endif /* MACH_KDB */
  91 #include <ddb/tr.h>
  92
  93 static boot_args *kernelBootArgs;
  94
  95 extern int disableConsoleOutput;
  96 extern const char version[];
  97 extern const char version_variant[];
  98 extern int nx_enabled;
  99
 100 extern int noVMX;       /* if set, rosetta should not emulate altivec */
 101
 102 void cpu_stack_set(void);
 103
 104
 105 /*
 106  *      Cpu initialization.  Running virtual, but without MACH VM
 107  *      set up.  First C routine called.
 108  */
 109 void
 110 i386_init(vm_offset_t boot_args_start)
 111 {
 112         unsigned int    maxmem;
 113         uint64_t        maxmemtouse;
 114         unsigned int    cpus;
 115         boolean_t       legacy_mode;
 116
 117         postcode(I386_INIT_ENTRY);
 118
 119         i386_macho_zerofill();
 120
 121         /*
 122          * Setup boot args given the physical start address.
 123          */
 124         kernelBootArgs = (boot_args *)
 125                 ml_static_ptovirt(boot_args_start);
 126         kernelBootArgs->MemoryMap = (uint32_t)
 127                 ml_static_ptovirt((vm_offset_t)kernelBootArgs->MemoryMap);
 128         kernelBootArgs->deviceTreeP = (uint32_t)
 129                 ml_static_ptovirt((vm_offset_t)kernelBootArgs->deviceTreeP);
 130
 131         master_cpu = 0;
 132         (void) cpu_data_alloc(TRUE);
 133         cpu_init();
 134         postcode(CPU_INIT_D);
 135
 136         /* init processor performance control */
 137         pmsInit();
 138
 139         PE_init_platform(FALSE, kernelBootArgs);
 140         postcode(PE_INIT_PLATFORM_D);
 141
 142         printf_init();                  /* Init this in case we need debugger */
 143         panic_init();                   /* Init this in case we need debugger */
 144
 145         /* setup debugging output if one has been chosen */
 146         PE_init_kprintf(FALSE);
 147
 148         if (!PE_parse_boot_arg("diag", &dgWork.dgFlags))
 149                 dgWork.dgFlags = 0;
 150
 151         serialmode = 0;
 152         if(PE_parse_boot_arg("serial", &serialmode)) {
 153                 /* We want a serial keyboard and/or console */
 154                 kprintf("Serial mode specified: %08X\n", serialmode);
 155         }
 156         if(serialmode & 1) {
 157                 (void)switch_to_serial_console();
 158                 disableConsoleOutput = FALSE;   /* Allow printfs to happen */
 159         }
 160
 161         /* setup console output */
 162         PE_init_printf(FALSE);
 163
 164         kprintf("version_variant = %s\n", version_variant);
 165         kprintf("version         = %s\n", version);
 166
 167         /*
 168          * VM initialization, after this we're using page tables...
 169          * The maximum number of cpus must be set beforehand.
 170          */
 171         if (!PE_parse_boot_arg("maxmem", &maxmem))
 172                 maxmemtouse=0;
 173         else
 174                 maxmemtouse = ((uint64_t)maxmem) * (uint64_t)(1024 * 1024);
 175
 176         if (PE_parse_boot_arg("cpus", &cpus)) {
 177                 if ((0 < cpus) && (cpus < max_ncpus))
 178                         max_ncpus = cpus;
 179         }
 180
 181         /*
 182          * debug support for > 4G systems
 183          */
 184         if (!PE_parse_boot_arg("himemory_mode", &vm_himemory_mode))
 185                 vm_himemory_mode = 0;
 186
 187         /*
 188          * At this point we check whether we are a 64-bit processor
 189          * and that we're not restricted to legacy mode, 32-bit operation.
 190          */
 191         boolean_t IA32e = FALSE;
 192         if (cpuid_extfeatures() & CPUID_EXTFEATURE_EM64T) {
 193                 kprintf("EM64T supported");
 194                 if (PE_parse_boot_arg("-legacy", &legacy_mode)) {
 195                         kprintf(" but legacy mode forced\n");
 196                 } else {
 197                         IA32e = TRUE;
 198                         kprintf(" and will be enabled\n");
 199                 }
 200         }
 201         if (!(cpuid_extfeatures() & CPUID_EXTFEATURE_XD))
 202                 nx_enabled = 0;
 203
 204         i386_vm_init(maxmemtouse, IA32e, kernelBootArgs);
 205
 206         if ( ! PE_parse_boot_arg("novmx", &noVMX))
 207                 noVMX = 0;      /* OK to support Altivec in rosetta? */
 208
 209         tsc_init();
 210         hpet_init();
 211         power_management_init();
 212
 213         PE_init_platform(TRUE, kernelBootArgs);
 214
 215         /* create the console for verbose or pretty mode */
 216         PE_create_console();
 217
 218         processor_bootstrap();
 219         thread_bootstrap();
 220
 221         machine_startup();
 222
 223 }