iokit/Kernel/IOStartIOKit.cpp

   1 /*
   2  * Copyright (c) 1998-2008 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  * Copyright (c) 1998,1999 Apple Inc.  All rights reserved.
  30  *
  31  * HISTORY
  32  *
  33  */
  34
  35 #include <libkern/c++/OSUnserialize.h>
  36 #include <libkern/c++/OSKext.h>
  37 #include <libkern/version.h>
  38 #include <IOKit/IORegistryEntry.h>
  39 #include <IOKit/IODeviceTreeSupport.h>
  40 #include <IOKit/IOCatalogue.h>
  41 #include <IOKit/IOUserClient.h>
  42 #include <IOKit/IOMemoryDescriptor.h>
  43 #include <IOKit/IOPlatformExpert.h>
  44 #include <IOKit/IOLib.h>
  45 #include <IOKit/IOKitKeys.h>
  46 #include <IOKit/IOKitDebug.h>
  47 #include <IOKit/pwr_mgt/IOPMinformeeList.h>
  48
  49 #include <IOKit/assert.h>
  50
  51 #include "IOKitKernelInternal.h"
  52
  53 extern "C" {
  54
  55 extern void OSlibkernInit (void);
  56
  57 void iokit_post_constructor_init(void) __attribute__((section("__TEXT, initcode")));
  58
  59 #include <kern/clock.h>
  60 #include <sys/time.h>
  61
  62 void IOKitInitializeTime( void )
  63 {
  64         mach_timespec_t         t;
  65
  66         t.tv_sec = 30;
  67         t.tv_nsec = 0;
  68         IOService::waitForService(
  69                 IOService::resourceMatching("IORTC"), &t );
  70 #ifdef ppc
  71         IOService::waitForService(
  72                 IOService::resourceMatching("IONVRAM"), &t );
  73 #endif
  74
  75     clock_initialize_calendar();
  76 }
  77
  78 void IOKitResetTime( void )
  79 {
  80     clock_sec_t         secs;
  81         clock_usec_t    microsecs;
  82
  83     clock_initialize_calendar();
  84
  85     clock_get_calendar_microtime(&secs, &microsecs);
  86     gIOLastWakeTime.tv_sec  = secs;
  87     gIOLastWakeTime.tv_usec = microsecs;
  88 }
  89
  90 void iokit_post_constructor_init(void)
  91 {
  92     IORegistryEntry *           root;
  93     OSObject *                  obj;
  94
  95     root = IORegistryEntry::initialize();
  96     assert( root );
  97     IOService::initialize();
  98     IOCatalogue::initialize();
  99     IOUserClient::initialize();
 100     IOMemoryDescriptor::initialize();
 101
 102     // Initializes IOPMinformeeList class-wide shared lock
 103     IOPMinformeeList::getSharedRecursiveLock();
 104
 105     obj = OSString::withCString( version );
 106     assert( obj );
 107     if( obj ) {
 108         root->setProperty( kIOKitBuildVersionKey, obj );
 109         obj->release();
 110     }
 111     obj = IOKitDiagnostics::diagnostics();
 112     if( obj ) {
 113         root->setProperty( kIOKitDiagnosticsKey, obj );
 114         obj->release();
 115     }
 116
 117 }
 118
 119 // From <osfmk/kern/debug.c>
 120 extern int debug_mode;
 121
 122 /*****
 123  * Pointer into bootstrap KLD segment for functions never used past startup.
 124  */
 125 void (*record_startup_extensions_function)(void) = 0;
 126
 127 void StartIOKit( void * p1, void * p2, void * p3, void * p4 )
 128 {
 129     IOPlatformExpertDevice *    rootNub;
 130     int                         debugFlags;
 131
 132     if( PE_parse_boot_argn( "io", &debugFlags, sizeof (debugFlags) ))
 133         gIOKitDebug = debugFlags;
 134
 135     // Check for the log synchronous bit set in io
 136     if (gIOKitDebug & kIOLogSynchronous)
 137         debug_mode = true;
 138
 139     //
 140     // Have to start IOKit environment before we attempt to start
 141     // the C++ runtime environment.  At some stage we have to clean up
 142     // the initialisation path so that OS C++ can initialise independantly
 143     // of iokit basic service initialisation, or better we have IOLib stuff
 144     // initialise as basic OS services.
 145     //
 146     IOLibInit();
 147     OSlibkernInit();
 148
 149     rootNub = new IOPlatformExpertDevice;
 150
 151     if( rootNub && rootNub->initWithArgs( p1, p2, p3, p4)) {
 152         rootNub->attach( 0 );
 153
 154        /* If the bootstrap segment set up a function to record startup
 155         * extensions, call it now.
 156         */
 157         if (record_startup_extensions_function) {
 158             record_startup_extensions_function();
 159         }
 160
 161         rootNub->registerService();
 162
 163 #if !NO_KEXTD
 164        /* Add a busy count to keep the registry busy until kextd has
 165         * completely finished launching. This is decremented when kextd
 166         * messages the kernel after the in-kernel linker has been
 167         * removed and personalities have been sent.
 168         */
 169         IOService::getServiceRoot()->adjustBusy(1);
 170 #endif
 171     }
 172 }
 173
 174 void
 175 IORegistrySetOSBuildVersion(char * build_version)
 176 {
 177     IORegistryEntry * root = IORegistryEntry::getRegistryRoot();
 178
 179     if (root) {
 180         if (build_version) {
 181             root->setProperty(kOSBuildVersionKey, build_version);
 182         } else {
 183             root->removeProperty(kOSBuildVersionKey);
 184         }
 185     }
 186
 187     return;
 188 }
 189
 190 }; /* extern "C" */