iokit/Kernel/IOStartIOKit.cpp

   1 /*
   2  * Copyright (c) 1998-2000 Apple Computer, Inc. All rights reserved.
   3  *
   4  * @APPLE_LICENSE_HEADER_START@
   5  *
   6  * Copyright (c) 1999-2003 Apple Computer, Inc.  All Rights Reserved.
   7  *
   8  * This file contains Original Code and/or Modifications of Original Code
   9  * as defined in and that are subject to the Apple Public Source License
  10  * Version 2.0 (the 'License'). You may not use this file except in
  11  * compliance with the License. Please obtain a copy of the License at
  12  * http://www.opensource.apple.com/apsl/ and read it before using this
  13  * file.
  14  *
  15  * The Original Code and all software distributed under the License are
  16  * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
  17  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
  18  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
  19  * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
  20  * Please see the License for the specific language governing rights and
  21  * limitations under the License.
  22  *
  23  * @APPLE_LICENSE_HEADER_END@
  24  */
  25 /*
  26  * Copyright (c) 1998,1999 Apple Computer, Inc.  All rights reserved.
  27  *
  28  * HISTORY
  29  *
  30  */
  31
  32 #include <libkern/c++/OSUnserialize.h>
  33 #include <IOKit/IORegistryEntry.h>
  34 #include <IOKit/IODeviceTreeSupport.h>
  35 #include <IOKit/IOCatalogue.h>
  36 #include <IOKit/IOUserClient.h>
  37 #include <IOKit/IOMemoryDescriptor.h>
  38 #include <IOKit/IOPlatformExpert.h>
  39 #include <IOKit/IOLib.h>
  40 #include <IOKit/IOKitKeys.h>
  41 #include <IOKit/IOKitDebug.h>
  42
  43 #include <IOKit/assert.h>
  44
  45 extern "C" {
  46
  47 extern void OSlibkernInit (void);
  48 extern void IOLibInit(void);
  49
  50 #include <kern/clock.h>
  51
  52 void IOKitResetTime( void )
  53 {
  54         mach_timespec_t         t;
  55
  56         t.tv_sec = 30;
  57         t.tv_nsec = 0;
  58         IOService::waitForService(
  59                 IOService::resourceMatching("IORTC"), &t );
  60 #ifndef i386
  61         IOService::waitForService(
  62                 IOService::resourceMatching("IONVRAM"), &t );
  63 #endif
  64
  65     clock_initialize_calendar();
  66 }
  67
  68 // From <osfmk/kern/debug.c>
  69 extern int debug_mode;
  70
  71 void StartIOKit( void * p1, void * p2, void * p3, void * p4 )
  72 {
  73     IOPlatformExpertDevice *    rootNub;
  74     int                         debugFlags;
  75     IORegistryEntry *           root;
  76     OSObject *                  obj;
  77     extern const char *         gIOKernelKmods;
  78     OSString *                  errorString = NULL; // must release
  79     OSDictionary *              fakeKmods;  // must release
  80     OSCollectionIterator *      kmodIter;   // must release
  81     OSString *                  kmodName;   // don't release
  82
  83     IOLog( iokit_version );
  84
  85     if( PE_parse_boot_arg( "io", &debugFlags ))
  86         gIOKitDebug = debugFlags;
  87
  88     // Check for the log synchronous bit set in io
  89     if (gIOKitDebug & kIOLogSynchronous)
  90         debug_mode = true;
  91
  92     //
  93     // Have to start IOKit environment before we attempt to start
  94     // the C++ runtime environment.  At some stage we have to clean up
  95     // the initialisation path so that OS C++ can initialise independantly
  96     // of iokit basic service initialisation, or better we have IOLib stuff
  97     // initialise as basic OS services.
  98     //
  99     IOLibInit();
 100     OSlibkernInit();
 101
 102    /*****
 103     * Declare the fake kmod_info structs for built-in components
 104     * that must be tracked as independent units for dependencies.
 105     */
 106     fakeKmods = OSDynamicCast(OSDictionary,
 107         OSUnserialize(gIOKernelKmods, &errorString));
 108
 109     if (!fakeKmods) {
 110         if (errorString) {
 111             panic("Kernel kmod list syntax error: %s\n",
 112                     errorString->getCStringNoCopy());
 113             errorString->release();
 114         } else {
 115             panic("Error loading kernel kmod list.\n");
 116         }
 117     }
 118
 119     kmodIter = OSCollectionIterator::withCollection(fakeKmods);
 120     if (!kmodIter) {
 121         panic("Can't declare in-kernel kmods.\n");
 122     }
 123     while ((kmodName = OSDynamicCast(OSString, kmodIter->getNextObject()))) {
 124
 125         OSString * kmodVersion = OSDynamicCast(OSString,
 126             fakeKmods->getObject(kmodName));
 127         if (!kmodVersion) {
 128             panic("Can't declare in-kernel kmod; \"%s\" has "
 129                 "an invalid version.\n",
 130                 kmodName->getCStringNoCopy());
 131         }
 132         if (KERN_SUCCESS != kmod_create_fake(kmodName->getCStringNoCopy(),
 133                 kmodVersion->getCStringNoCopy())) {
 134             panic("Failure declaring in-kernel kmod \"%s\".\n",
 135                 kmodName->getCStringNoCopy());
 136         }
 137     }
 138
 139     kmodIter->release();
 140     fakeKmods->release();
 141
 142
 143
 144     root = IORegistryEntry::initialize();
 145     assert( root );
 146     IOService::initialize();
 147     IOCatalogue::initialize();
 148     IOUserClient::initialize();
 149     IOMemoryDescriptor::initialize();
 150
 151     obj = OSString::withCString( iokit_version );
 152     assert( obj );
 153     if( obj ) {
 154         root->setProperty( kIOKitBuildVersionKey, obj );
 155         obj->release();
 156     }
 157     obj = IOKitDiagnostics::diagnostics();
 158     if( obj ) {
 159         root->setProperty( kIOKitDiagnosticsKey, obj );
 160         obj->release();
 161     }
 162
 163     rootNub = new IOPlatformExpertDevice;
 164
 165     if( rootNub && rootNub->initWithArgs( p1, p2, p3, p4)) {
 166         rootNub->attach( 0 );
 167
 168        /* Enter into the catalogue the drivers
 169         * provided by BootX.
 170         */
 171         gIOCatalogue->recordStartupExtensions();
 172
 173         rootNub->registerService();
 174     }
 175 }
 176
 177 }; /* extern "C" */