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 #include <IOKit/IOInterruptAccountingPrivate.h>
  46
  47 #include <IOKit/assert.h>
  48
  49 #include "IOKitKernelInternal.h"
  50
  51 const OSSymbol * gIOProgressBackbufferKey;
  52 OSSet *          gIORemoveOnReadProperties;
  53
  54 extern "C" {
  55
  56 extern void OSlibkernInit (void);
  57
  58 void iokit_post_constructor_init(void);
  59
  60 #include <kern/clock.h>
  61 #include <sys/time.h>
  62
  63 void IOKitInitializeTime( void )
  64 {
  65         mach_timespec_t         t;
  66
  67         t.tv_sec = 30;
  68         t.tv_nsec = 0;
  69         IOService::waitForService(
  70                 IOService::resourceMatching("IORTC"), &t );
  71 #if defined(__i386__) || defined(__x86_64__)
  72         IOService::waitForService(
  73                 IOService::resourceMatching("IONVRAM"), &t );
  74 #endif
  75
  76     clock_initialize_calendar();
  77 }
  78
  79 void IOKitResetTime( void )
  80 {
  81     clock_sec_t         secs;
  82         clock_usec_t    microsecs;
  83
  84     clock_initialize_calendar();
  85
  86     clock_get_calendar_microtime(&secs, &microsecs);
  87     gIOLastWakeTime.tv_sec  = secs;
  88     gIOLastWakeTime.tv_usec = microsecs;
  89
  90     IOService::updateConsoleUsers(NULL, kIOMessageSystemHasPoweredOn);
  91 }
  92
  93 void iokit_post_constructor_init(void)
  94 {
  95     IORegistryEntry *           root;
  96     OSObject *                  obj;
  97
  98     root = IORegistryEntry::initialize();
  99     assert( root );
 100     IOService::initialize();
 101     IOCatalogue::initialize();
 102     IOStatistics::initialize();
 103     OSKext::initialize();
 104     IOUserClient::initialize();
 105     IOMemoryDescriptor::initialize();
 106     IORootParent::initialize();
 107
 108     // Initializes IOPMinformeeList class-wide shared lock
 109     IOPMinformeeList::getSharedRecursiveLock();
 110
 111     obj = OSString::withCString( version );
 112     assert( obj );
 113     if( obj ) {
 114         root->setProperty( kIOKitBuildVersionKey, obj );
 115         obj->release();
 116     }
 117     obj = IOKitDiagnostics::diagnostics();
 118     if( obj ) {
 119         root->setProperty( kIOKitDiagnosticsKey, obj );
 120         obj->release();
 121     }
 122 }
 123
 124 // From <osfmk/kern/debug.c>
 125 extern int debug_mode;
 126
 127 /*****
 128  * Pointer into bootstrap KLD segment for functions never used past startup.
 129  */
 130 void (*record_startup_extensions_function)(void) = 0;
 131
 132 void StartIOKit( void * p1, void * p2, void * p3, void * p4 )
 133 {
 134     IOPlatformExpertDevice *    rootNub;
 135     int                         debugFlags;
 136
 137     if( PE_parse_boot_argn( "io", &debugFlags, sizeof (debugFlags) ))
 138                 gIOKitDebug = debugFlags;
 139
 140     if( PE_parse_boot_argn( "iotrace", &debugFlags, sizeof (debugFlags) ))
 141                 gIOKitTrace = debugFlags;
 142
 143         // Compat for boot-args
 144         gIOKitTrace |= (gIOKitDebug & kIOTraceCompatBootArgs);
 145
 146     // Check for the log synchronous bit set in io
 147     if (gIOKitDebug & kIOLogSynchronous)
 148         debug_mode = true;
 149
 150     //
 151     // Have to start IOKit environment before we attempt to start
 152     // the C++ runtime environment.  At some stage we have to clean up
 153     // the initialisation path so that OS C++ can initialise independantly
 154     // of iokit basic service initialisation, or better we have IOLib stuff
 155     // initialise as basic OS services.
 156     //
 157     IOLibInit();
 158     OSlibkernInit();
 159
 160     gIOProgressBackbufferKey  = OSSymbol::withCStringNoCopy(kIOProgressBackbufferKey);
 161     gIORemoveOnReadProperties = OSSet::withObjects((const OSObject **) &gIOProgressBackbufferKey, 1);
 162
 163     interruptAccountingInit();
 164
 165     rootNub = new IOPlatformExpertDevice;
 166
 167     if( rootNub && rootNub->initWithArgs( p1, p2, p3, p4)) {
 168         rootNub->attach( 0 );
 169
 170        /* If the bootstrap segment set up a function to record startup
 171         * extensions, call it now.
 172         */
 173         if (record_startup_extensions_function) {
 174             record_startup_extensions_function();
 175         }
 176
 177         rootNub->registerService();
 178
 179 #if !NO_KEXTD
 180        /* Add a busy count to keep the registry busy until kextd has
 181         * completely finished launching. This is decremented when kextd
 182         * messages the kernel after the in-kernel linker has been
 183         * removed and personalities have been sent.
 184         */
 185         IOService::getServiceRoot()->adjustBusy(1);
 186 #endif
 187     }
 188 }
 189
 190 void
 191 IORegistrySetOSBuildVersion(char * build_version)
 192 {
 193     IORegistryEntry * root = IORegistryEntry::getRegistryRoot();
 194
 195     if (root) {
 196         if (build_version) {
 197             root->setProperty(kOSBuildVersionKey, build_version);
 198         } else {
 199             root->removeProperty(kOSBuildVersionKey);
 200         }
 201     }
 202
 203     return;
 204 }
 205
 206 void
 207 IORecordProgressBackbuffer(void * buffer, size_t size, uint32_t theme)
 208 {
 209     IORegistryEntry * chosen;
 210     if ((chosen = IORegistryEntry::fromPath(kIODeviceTreePlane ":/chosen")))
 211     {
 212         chosen->setProperty(kIOProgressBackbufferKey, buffer, size);
 213         chosen->setProperty(kIOProgressColorThemeKey, theme, 32);
 214
 215         chosen->release();
 216     }
 217 }
 218
 219 }; /* extern "C" */