iokit/Kernel/IOStartIOKit.cpp

   1 /*
   2  * Copyright (c) 1998-2010 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 #include <libkern/c++/OSUnserialize.h>
  30 #include <libkern/c++/OSKext.h>
  31 #include <libkern/version.h>
  32 #include <IOKit/IORegistryEntry.h>
  33 #include <IOKit/IODeviceTreeSupport.h>
  34 #include <IOKit/IOCatalogue.h>
  35 #include <IOKit/IOUserClient.h>
  36 #include <IOKit/IOMemoryDescriptor.h>
  37 #include <IOKit/IOPlatformExpert.h>
  38 #include <IOKit/IOLib.h>
  39 #include <IOKit/IOKitKeys.h>
  40 #include <IOKit/IOKitDebug.h>
  41 #include <IOKit/pwr_mgt/RootDomain.h>
  42 #include <IOKit/pwr_mgt/IOPMinformeeList.h>
  43 #include <IOKit/IOStatisticsPrivate.h>
  44 #include <IOKit/IOKitKeysPrivate.h>
  45
  46 #include <IOKit/assert.h>
  47
  48 #include "IOKitKernelInternal.h"
  49
  50 extern "C" {
  51
  52 extern void OSlibkernInit (void);
  53
  54 void iokit_post_constructor_init(void) __attribute__((section("__TEXT, initcode")));
  55
  56 #include <kern/clock.h>
  57 #include <sys/time.h>
  58
  59 void IOKitInitializeTime( void )
  60 {
  61         mach_timespec_t         t;
  62
  63         t.tv_sec = 30;
  64         t.tv_nsec = 0;
  65         IOService::waitForService(
  66                 IOService::resourceMatching("IORTC"), &t );
  67 #if defined(__i386__) || defined(__x86_64__)
  68         IOService::waitForService(
  69                 IOService::resourceMatching("IONVRAM"), &t );
  70 #endif
  71
  72     clock_initialize_calendar();
  73 }
  74
  75 void IOKitResetTime( void )
  76 {
  77     clock_sec_t         secs;
  78         clock_usec_t    microsecs;
  79
  80     clock_initialize_calendar();
  81
  82     clock_get_calendar_microtime(&secs, &microsecs);
  83     gIOLastWakeTime.tv_sec  = secs;
  84     gIOLastWakeTime.tv_usec = microsecs;
  85
  86     IOService::updateConsoleUsers(NULL, kIOMessageSystemHasPoweredOn);
  87 }
  88
  89 void iokit_post_constructor_init(void)
  90 {
  91     IORegistryEntry *           root;
  92     OSObject *                  obj;
  93
  94     root = IORegistryEntry::initialize();
  95     assert( root );
  96     IOService::initialize();
  97     IOCatalogue::initialize();
  98     IOStatistics::initialize();
  99     OSKext::initialize();
 100     IOUserClient::initialize();
 101     IOMemoryDescriptor::initialize();
 102     IORootParent::initialize();
 103
 104     // Initializes IOPMinformeeList class-wide shared lock
 105     IOPMinformeeList::getSharedRecursiveLock();
 106
 107     obj = OSString::withCString( version );
 108     assert( obj );
 109     if( obj ) {
 110         root->setProperty( kIOKitBuildVersionKey, obj );
 111         obj->release();
 112     }
 113     obj = IOKitDiagnostics::diagnostics();
 114     if( obj ) {
 115         root->setProperty( kIOKitDiagnosticsKey, obj );
 116         obj->release();
 117     }
 118 }
 119
 120 // From <osfmk/kern/debug.c>
 121 extern int debug_mode;
 122
 123 /*****
 124  * Pointer into bootstrap KLD segment for functions never used past startup.
 125  */
 126 void (*record_startup_extensions_function)(void) = 0;
 127
 128 void StartIOKit( void * p1, void * p2, void * p3, void * p4 )
 129 {
 130     IOPlatformExpertDevice *    rootNub;
 131     int                         debugFlags;
 132
 133     if( PE_parse_boot_argn( "io", &debugFlags, sizeof (debugFlags) ))
 134                 gIOKitDebug = debugFlags;
 135
 136     if( PE_parse_boot_argn( "iotrace", &debugFlags, sizeof (debugFlags) ))
 137                 gIOKitTrace = debugFlags;
 138
 139         // Compat for boot-args
 140         gIOKitTrace |= (gIOKitDebug & kIOTraceCompatBootArgs);
 141
 142     // Check for the log synchronous bit set in io
 143     if (gIOKitDebug & kIOLogSynchronous)
 144         debug_mode = true;
 145
 146     //
 147     // Have to start IOKit environment before we attempt to start
 148     // the C++ runtime environment.  At some stage we have to clean up
 149     // the initialisation path so that OS C++ can initialise independantly
 150     // of iokit basic service initialisation, or better we have IOLib stuff
 151     // initialise as basic OS services.
 152     //
 153     IOLibInit();
 154     OSlibkernInit();
 155
 156     rootNub = new IOPlatformExpertDevice;
 157
 158     if( rootNub && rootNub->initWithArgs( p1, p2, p3, p4)) {
 159         rootNub->attach( 0 );
 160
 161        /* If the bootstrap segment set up a function to record startup
 162         * extensions, call it now.
 163         */
 164         if (record_startup_extensions_function) {
 165             record_startup_extensions_function();
 166         }
 167
 168         rootNub->registerService();
 169
 170 #if !NO_KEXTD
 171        /* Add a busy count to keep the registry busy until kextd has
 172         * completely finished launching. This is decremented when kextd
 173         * messages the kernel after the in-kernel linker has been
 174         * removed and personalities have been sent.
 175         */
 176         IOService::getServiceRoot()->adjustBusy(1);
 177 #endif
 178     }
 179 }
 180
 181 void
 182 IORegistrySetOSBuildVersion(char * build_version)
 183 {
 184     IORegistryEntry * root = IORegistryEntry::getRegistryRoot();
 185
 186     if (root) {
 187         if (build_version) {
 188             root->setProperty(kOSBuildVersionKey, build_version);
 189         } else {
 190             root->removeProperty(kOSBuildVersionKey);
 191         }
 192     }
 193
 194     return;
 195 }
 196
 197 }; /* extern "C" */