iokit/Kernel/IOStartIOKit.cpp

   1 /*
   2  * Copyright (c) 1998-2006 Apple Computer, 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 Computer, Inc.  All rights reserved.
  30  *
  31  * HISTORY
  32  *
  33  */
  34
  35 #include <libkern/c++/OSUnserialize.h>
  36 #include <libkern/version.h>
  37 #include <IOKit/IORegistryEntry.h>
  38 #include <IOKit/IODeviceTreeSupport.h>
  39 #include <IOKit/IOCatalogue.h>
  40 #include <IOKit/IOUserClient.h>
  41 #include <IOKit/IOMemoryDescriptor.h>
  42 #include <IOKit/IOPlatformExpert.h>
  43 #include <IOKit/IOLib.h>
  44 #include <IOKit/IOKitKeys.h>
  45 #include <IOKit/IOKitDebug.h>
  46 #include <IOKit/pwr_mgt/IOPMinformeeList.h>
  47
  48 #include <IOKit/assert.h>
  49
  50 #include "IOKitKernelInternal.h"
  51
  52 extern "C" {
  53
  54 extern void OSlibkernInit (void);
  55 extern void ml_hpet_cfg(uint32_t, uint32_t);
  56
  57 #include <kern/clock.h>
  58 #include <sys/time.h>
  59
  60 void IOKitInitializeTime( void )
  61 {
  62         mach_timespec_t         t;
  63
  64         t.tv_sec = 30;
  65         t.tv_nsec = 0;
  66         IOService::waitForService(
  67                 IOService::resourceMatching("IORTC"), &t );
  68 #ifdef ppc
  69         IOService::waitForService(
  70                 IOService::resourceMatching("IONVRAM"), &t );
  71 #endif
  72
  73     clock_initialize_calendar();
  74 }
  75
  76 void IOKitResetTime( void )
  77 {
  78     uint32_t secs, microsecs;
  79
  80     clock_initialize_calendar();
  81
  82     clock_get_calendar_microtime(&secs, &microsecs);
  83     gIOLastWakeTime.tv_sec  = secs;
  84     gIOLastWakeTime.tv_usec = microsecs;
  85 }
  86
  87
  88 // From <osfmk/kern/debug.c>
  89 extern int debug_mode;
  90
  91 void StartIOKit( void * p1, void * p2, void * p3, void * p4 )
  92 {
  93     IOPlatformExpertDevice *    rootNub;
  94     int                         debugFlags;
  95     IORegistryEntry *           root;
  96     OSObject *                  obj;
  97     extern const char *         gIOKernelKmods;
  98     OSString *                  errorString = NULL; // must release
  99     OSDictionary *              fakeKmods;  // must release
 100     OSCollectionIterator *      kmodIter;   // must release
 101     OSString *                  kmodName;   // don't release
 102
 103     if( PE_parse_boot_arg( "io", &debugFlags ))
 104         gIOKitDebug = debugFlags;
 105
 106     // Check for the log synchronous bit set in io
 107     if (gIOKitDebug & kIOLogSynchronous)
 108         debug_mode = true;
 109
 110     //
 111     // Have to start IOKit environment before we attempt to start
 112     // the C++ runtime environment.  At some stage we have to clean up
 113     // the initialisation path so that OS C++ can initialise independantly
 114     // of iokit basic service initialisation, or better we have IOLib stuff
 115     // initialise as basic OS services.
 116     //
 117     IOLibInit();
 118     OSlibkernInit();
 119
 120    /*****
 121     * Declare the fake kmod_info structs for built-in components
 122     * that must be tracked as independent units for dependencies.
 123     */
 124     fakeKmods = OSDynamicCast(OSDictionary,
 125         OSUnserialize(gIOKernelKmods, &errorString));
 126
 127     if (!fakeKmods) {
 128         if (errorString) {
 129             panic("Kernel kmod list syntax error: %s\n",
 130                     errorString->getCStringNoCopy());
 131             errorString->release();
 132         } else {
 133             panic("Error loading kernel kmod list.\n");
 134         }
 135     }
 136
 137     kmodIter = OSCollectionIterator::withCollection(fakeKmods);
 138     if (!kmodIter) {
 139         panic("Can't declare in-kernel kmods.\n");
 140     }
 141     while ((kmodName = OSDynamicCast(OSString, kmodIter->getNextObject()))) {
 142
 143         OSString * kmodVersion = OSDynamicCast(OSString,
 144             fakeKmods->getObject(kmodName));
 145         if (!kmodVersion) {
 146             panic("Can't declare in-kernel kmod; \"%s\" has "
 147                 "an invalid version.\n",
 148                 kmodName->getCStringNoCopy());
 149         }
 150
 151         // empty version strings get replaced with current kernel version
 152         const char *vers = (strlen(kmodVersion->getCStringNoCopy())
 153                                  ? kmodVersion->getCStringNoCopy()
 154                                  : osrelease);
 155
 156         if (KERN_SUCCESS != kmod_create_fake(kmodName->getCStringNoCopy(), vers)) {
 157             panic("Failure declaring in-kernel kmod \"%s\".\n",
 158                 kmodName->getCStringNoCopy());
 159         }
 160     }
 161
 162     kmodIter->release();
 163     fakeKmods->release();
 164
 165
 166
 167     root = IORegistryEntry::initialize();
 168     assert( root );
 169     IOService::initialize();
 170     IOCatalogue::initialize();
 171     IOUserClient::initialize();
 172     IOMemoryDescriptor::initialize();
 173
 174     // Initializes IOPMinformeeList class-wide shared lock
 175     IOPMinformeeList::getSharedRecursiveLock();
 176
 177     obj = OSString::withCString( version );
 178     assert( obj );
 179     if( obj ) {
 180         root->setProperty( kIOKitBuildVersionKey, obj );
 181         obj->release();
 182     }
 183     obj = IOKitDiagnostics::diagnostics();
 184     if( obj ) {
 185         root->setProperty( kIOKitDiagnosticsKey, obj );
 186         obj->release();
 187     }
 188
 189     rootNub = new IOPlatformExpertDevice;
 190
 191     if( rootNub && rootNub->initWithArgs( p1, p2, p3, p4)) {
 192         rootNub->attach( 0 );
 193
 194        /* Enter into the catalogue the drivers
 195         * provided by BootX.
 196         */
 197         gIOCatalogue->recordStartupExtensions();
 198
 199         rootNub->registerService();
 200
 201 #if !NO_KEXTD
 202        /* Add a busy count to keep the registry busy until kextd has
 203         * completely finished launching. This is decremented when kextd
 204         * messages the kernel after the in-kernel linker has been
 205         * removed and personalities have been sent.
 206         */
 207         IOService::getServiceRoot()->adjustBusy(1);
 208 #endif
 209     }
 210 }
 211
 212 void
 213 IORegistrySetOSBuildVersion(char * build_version)
 214 {
 215     IORegistryEntry * root = IORegistryEntry::getRegistryRoot();
 216
 217     if (root) {
 218         if (build_version) {
 219             root->setProperty(kOSBuildVersionKey, build_version);
 220         } else {
 221             root->removeProperty(kOSBuildVersionKey);
 222         }
 223     }
 224
 225     return;
 226 }
 227
 228 }; /* extern "C" */