iokit/Kernel/IOStartIOKit.cpp

   1 /*
   2  * Copyright (c) 1998-2011 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/IOPMinformeeList.h>
  42
  43 #include <IOKit/assert.h>
  44
  45 #include "IOKitKernelInternal.h"
  46
  47 extern "C" {
  48
  49 extern void OSlibkernInit (void);
  50
  51 void iokit_post_constructor_init(void) __attribute__((section("__TEXT, initcode")));
  52
  53 #include <kern/clock.h>
  54 #include <sys/time.h>
  55
  56 void IOKitInitializeTime( void )
  57 {
  58         mach_timespec_t         t;
  59
  60         t.tv_sec = 30;
  61         t.tv_nsec = 0;
  62         IOService::waitForService(
  63                 IOService::resourceMatching("IORTC"), &t );
  64 #ifdef ppc
  65         IOService::waitForService(
  66                 IOService::resourceMatching("IONVRAM"), &t );
  67 #endif
  68
  69     clock_initialize_calendar();
  70 }
  71
  72 void IOKitResetTime( void )
  73 {
  74     clock_sec_t         secs;
  75         clock_usec_t    microsecs;
  76
  77     clock_initialize_calendar();
  78
  79     clock_get_calendar_microtime(&secs, &microsecs);
  80     gIOLastWakeTime.tv_sec  = secs;
  81     gIOLastWakeTime.tv_usec = microsecs;
  82 }
  83
  84 void iokit_post_constructor_init(void)
  85 {
  86     IORegistryEntry *           root;
  87     OSObject *                  obj;
  88
  89     root = IORegistryEntry::initialize();
  90     assert( root );
  91     IOService::initialize();
  92     IOCatalogue::initialize();
  93     IOUserClient::initialize();
  94     IOMemoryDescriptor::initialize();
  95
  96     // Initializes IOPMinformeeList class-wide shared lock
  97     IOPMinformeeList::getSharedRecursiveLock();
  98
  99     obj = OSString::withCString( version );
 100     assert( obj );
 101     if( obj ) {
 102         root->setProperty( kIOKitBuildVersionKey, obj );
 103         obj->release();
 104     }
 105     obj = IOKitDiagnostics::diagnostics();
 106     if( obj ) {
 107         root->setProperty( kIOKitDiagnosticsKey, obj );
 108         obj->release();
 109     }
 110
 111 }
 112
 113 // From <osfmk/kern/debug.c>
 114 extern int debug_mode;
 115
 116 /*****
 117  * Pointer into bootstrap KLD segment for functions never used past startup.
 118  */
 119 void (*record_startup_extensions_function)(void) = 0;
 120
 121 void StartIOKit( void * p1, void * p2, void * p3, void * p4 )
 122 {
 123     IOPlatformExpertDevice *    rootNub;
 124     int                         debugFlags;
 125         uint32_t                intThreshold;
 126
 127     if( PE_parse_boot_argn( "io", &debugFlags, sizeof (debugFlags) ))
 128         gIOKitDebug = debugFlags;
 129
 130     if( PE_parse_boot_argn( "iotrace", &debugFlags, sizeof (debugFlags) ))
 131                 gIOKitTrace = debugFlags;
 132
 133         // Compat for boot-args
 134         gIOKitTrace |= (gIOKitDebug & kIOTraceCompatBootArgs);
 135
 136     if( PE_parse_boot_argn( "iointthreshold", &intThreshold, sizeof (intThreshold) ))
 137                 gIOInterruptThresholdNS = intThreshold * 1000;
 138
 139     // Check for the log synchronous bit set in io
 140     if (gIOKitDebug & kIOLogSynchronous)
 141         debug_mode = true;
 142
 143     //
 144     // Have to start IOKit environment before we attempt to start
 145     // the C++ runtime environment.  At some stage we have to clean up
 146     // the initialisation path so that OS C++ can initialise independantly
 147     // of iokit basic service initialisation, or better we have IOLib stuff
 148     // initialise as basic OS services.
 149     //
 150     IOLibInit();
 151     OSlibkernInit();
 152
 153     rootNub = new IOPlatformExpertDevice;
 154
 155     if( rootNub && rootNub->initWithArgs( p1, p2, p3, p4)) {
 156         rootNub->attach( 0 );
 157
 158        /* If the bootstrap segment set up a function to record startup
 159         * extensions, call it now.
 160         */
 161         if (record_startup_extensions_function) {
 162             record_startup_extensions_function();
 163         }
 164
 165         rootNub->registerService();
 166
 167 #if !NO_KEXTD
 168        /* Add a busy count to keep the registry busy until kextd has
 169         * completely finished launching. This is decremented when kextd
 170         * messages the kernel after the in-kernel linker has been
 171         * removed and personalities have been sent.
 172         */
 173         IOService::getServiceRoot()->adjustBusy(1);
 174 #endif
 175     }
 176 }
 177
 178 void
 179 IORegistrySetOSBuildVersion(char * build_version)
 180 {
 181     IORegistryEntry * root = IORegistryEntry::getRegistryRoot();
 182
 183     if (root) {
 184         if (build_version) {
 185             root->setProperty(kOSBuildVersionKey, build_version);
 186         } else {
 187             root->removeProperty(kOSBuildVersionKey);
 188         }
 189     }
 190
 191     return;
 192 }
 193
 194 }; /* extern "C" */