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 void StartIOKit( void * p1, void * p2, void * p3, void * p4 );
  56 void IORegistrySetOSBuildVersion(char * build_version);
  57 void IORecordProgressBackbuffer(void * buffer, size_t size, uint32_t theme);
  58
  59 extern void OSlibkernInit(void);
  60
  61 void iokit_post_constructor_init(void);
  62
  63 #include <kern/clock.h>
  64 #include <sys/time.h>
  65
  66 void
  67 IOKitInitializeTime( void )
  68 {
  69         mach_timespec_t         t;
  70
  71         t.tv_sec = 30;
  72         t.tv_nsec = 0;
  73
  74 // RTC is not present on this target
  75 #ifndef BCM2837
  76         IOService::waitForService(
  77                 IOService::resourceMatching("IORTC"), &t );
  78 #endif
  79 #if defined(__i386__) || defined(__x86_64__)
  80         IOService::waitForService(
  81                 IOService::resourceMatching("IONVRAM"), &t );
  82 #endif
  83
  84         clock_initialize_calendar();
  85 }
  86
  87 void
  88 iokit_post_constructor_init(void)
  89 {
  90         IORegistryEntry *           root;
  91         OSObject *                  obj;
  92
  93         IOCPUInitialize();
  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 /*****
 121  * Pointer into bootstrap KLD segment for functions never used past startup.
 122  */
 123 void (*record_startup_extensions_function)(void) = NULL;
 124
 125 void
 126 StartIOKit( void * p1, void * p2, void * p3, void * p4 )
 127 {
 128         IOPlatformExpertDevice *    rootNub;
 129         int                         debugFlags;
 130
 131         if (PE_parse_boot_argn( "io", &debugFlags, sizeof(debugFlags))) {
 132                 gIOKitDebug = debugFlags;
 133         }
 134 #if DEVELOPMENT || DEBUG
 135         else {
 136                 gIOKitDebug |= kIOWaitQuietPanics;
 137         }
 138 #endif /* DEVELOPMENT || DEBUG */
 139
 140         if (PE_parse_boot_argn( "iotrace", &debugFlags, sizeof(debugFlags))) {
 141                 gIOKitTrace = debugFlags;
 142         }
 143
 144         // Compat for boot-args
 145         gIOKitTrace |= (gIOKitDebug & kIOTraceCompatBootArgs);
 146
 147         if (PE_parse_boot_argn( "pmtimeout", &debugFlags, sizeof(debugFlags))) {
 148                 gCanSleepTimeout = debugFlags;
 149         }
 150
 151         if (PE_parse_boot_argn( "dk", &debugFlags, sizeof(debugFlags))) {
 152                 gIODKDebug = debugFlags;
 153         }
 154
 155
 156         //
 157         // Have to start IOKit environment before we attempt to start
 158         // the C++ runtime environment.  At some stage we have to clean up
 159         // the initialisation path so that OS C++ can initialise independantly
 160         // of iokit basic service initialisation, or better we have IOLib stuff
 161         // initialise as basic OS services.
 162         //
 163         IOLibInit();
 164         OSlibkernInit();
 165         IOMachPortInitialize();
 166         devsw_init();
 167
 168         gIOProgressBackbufferKey  = OSSymbol::withCStringNoCopy(kIOProgressBackbufferKey);
 169         gIORemoveOnReadProperties = OSSet::withObjects((const OSObject **) &gIOProgressBackbufferKey, 1);
 170
 171         interruptAccountingInit();
 172
 173         rootNub = new IOPlatformExpertDevice;
 174
 175         if (rootNub && rootNub->initWithArgs( p1, p2, p3, p4)) {
 176                 rootNub->attach( NULL );
 177
 178                 /* If the bootstrap segment set up a function to record startup
 179                  * extensions, call it now.
 180                  */
 181                 if (record_startup_extensions_function) {
 182                         record_startup_extensions_function();
 183                 }
 184
 185                 rootNub->registerService();
 186
 187 #if !NO_KEXTD
 188                 /* Add a busy count to keep the registry busy until kextd has
 189                  * completely finished launching. This is decremented when kextd
 190                  * messages the kernel after the in-kernel linker has been
 191                  * removed and personalities have been sent.
 192                  */
 193                 IOService::getServiceRoot()->adjustBusy(1);
 194 #endif
 195         }
 196 }
 197
 198 void
 199 IORegistrySetOSBuildVersion(char * build_version)
 200 {
 201         IORegistryEntry * root = IORegistryEntry::getRegistryRoot();
 202
 203         if (root) {
 204                 if (build_version) {
 205                         root->setProperty(kOSBuildVersionKey, build_version);
 206                 } else {
 207                         root->removeProperty(kOSBuildVersionKey);
 208                 }
 209         }
 210
 211         return;
 212 }
 213
 214 void
 215 IORecordProgressBackbuffer(void * buffer, size_t size, uint32_t theme)
 216 {
 217         IORegistryEntry * chosen;
 218         if ((chosen = IORegistryEntry::fromPath(kIODeviceTreePlane ":/chosen"))) {
 219                 chosen->setProperty(kIOProgressBackbufferKey, buffer, size);
 220                 chosen->setProperty(kIOProgressColorThemeKey, theme, 32);
 221
 222                 chosen->release();
 223         }
 224 }
 225 }; /* extern "C" */