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