iokit/Kernel/IOStartIOKit.cpp

   1 /*
   2  * Copyright (c) 1998-2005 Apple Computer, Inc. All rights reserved.
   3  *
   4  * @APPLE_LICENSE_HEADER_START@
   5  *
   6  * The contents of this file constitute Original Code as defined in and
   7  * are subject to the Apple Public Source License Version 1.1 (the
   8  * "License").  You may not use this file except in compliance with the
   9  * License.  Please obtain a copy of the License at
  10  * http://www.apple.com/publicsource and read it before using this file.
  11  *
  12  * This Original Code and all software distributed under the License are
  13  * distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, EITHER
  14  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
  15  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
  16  * FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT.  Please see the
  17  * License for the specific language governing rights and limitations
  18  * under the License.
  19  *
  20  * @APPLE_LICENSE_HEADER_END@
  21  */
  22 /*
  23  * Copyright (c) 1998,1999 Apple Computer, Inc.  All rights reserved.
  24  *
  25  * HISTORY
  26  *
  27  */
  28
  29 #include <libkern/c++/OSUnserialize.h>
  30 #include <libkern/version.h>
  31 #include <IOKit/IORegistryEntry.h>
  32 #include <IOKit/IODeviceTreeSupport.h>
  33 #include <IOKit/IOCatalogue.h>
  34 #include <IOKit/IOUserClient.h>
  35 #include <IOKit/IOMemoryDescriptor.h>
  36 #include <IOKit/IOPlatformExpert.h>
  37 #include <IOKit/IOLib.h>
  38 #include <IOKit/IOKitKeys.h>
  39 #include <IOKit/IOKitDebug.h>
  40
  41 #include <IOKit/assert.h>
  42
  43 #include "IOKitKernelInternal.h"
  44
  45 extern "C" {
  46
  47 extern void OSlibkernInit (void);
  48 extern void ml_hpet_cfg(uint32_t, uint32_t);
  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
  64 #endif
  65
  66     clock_initialize_calendar();
  67 }
  68
  69 // From <osfmk/kern/debug.c>
  70 extern int debug_mode;
  71
  72 void StartIOKit( void * p1, void * p2, void * p3, void * p4 )
  73 {
  74     IOPlatformExpertDevice *    rootNub;
  75     int                         debugFlags;
  76     IORegistryEntry *           root;
  77     OSObject *                  obj;
  78     extern const char *         gIOKernelKmods;
  79     OSString *                  errorString = NULL; // must release
  80     OSDictionary *              fakeKmods;  // must release
  81     OSCollectionIterator *      kmodIter;   // must release
  82     OSString *                  kmodName;   // don't release
  83
  84     if( PE_parse_boot_arg( "io", &debugFlags ))
  85         gIOKitDebug = debugFlags;
  86
  87     // Check for the log synchronous bit set in io
  88     if (gIOKitDebug & kIOLogSynchronous)
  89         debug_mode = true;
  90
  91     //
  92     // Have to start IOKit environment before we attempt to start
  93     // the C++ runtime environment.  At some stage we have to clean up
  94     // the initialisation path so that OS C++ can initialise independantly
  95     // of iokit basic service initialisation, or better we have IOLib stuff
  96     // initialise as basic OS services.
  97     //
  98     IOLibInit();
  99     OSlibkernInit();
 100
 101    /*****
 102     * Declare the fake kmod_info structs for built-in components
 103     * that must be tracked as independent units for dependencies.
 104     */
 105     fakeKmods = OSDynamicCast(OSDictionary,
 106         OSUnserialize(gIOKernelKmods, &errorString));
 107
 108     if (!fakeKmods) {
 109         if (errorString) {
 110             panic("Kernel kmod list syntax error: %s\n",
 111                     errorString->getCStringNoCopy());
 112             errorString->release();
 113         } else {
 114             panic("Error loading kernel kmod list.\n");
 115         }
 116     }
 117
 118     kmodIter = OSCollectionIterator::withCollection(fakeKmods);
 119     if (!kmodIter) {
 120         panic("Can't declare in-kernel kmods.\n");
 121     }
 122     while ((kmodName = OSDynamicCast(OSString, kmodIter->getNextObject()))) {
 123
 124         OSString * kmodVersion = OSDynamicCast(OSString,
 125             fakeKmods->getObject(kmodName));
 126         if (!kmodVersion) {
 127             panic("Can't declare in-kernel kmod; \"%s\" has "
 128                 "an invalid version.\n",
 129                 kmodName->getCStringNoCopy());
 130         }
 131
 132         // empty version strings get replaced with current kernel version
 133         const char *vers = (strlen(kmodVersion->getCStringNoCopy())
 134                                  ? kmodVersion->getCStringNoCopy()
 135                                  : osrelease);
 136
 137         if (KERN_SUCCESS != kmod_create_fake(kmodName->getCStringNoCopy(), vers)) {
 138             panic("Failure declaring in-kernel kmod \"%s\".\n",
 139                 kmodName->getCStringNoCopy());
 140         }
 141     }
 142
 143     kmodIter->release();
 144     fakeKmods->release();
 145
 146
 147
 148     root = IORegistryEntry::initialize();
 149     assert( root );
 150     IOService::initialize();
 151     IOCatalogue::initialize();
 152     IOUserClient::initialize();
 153     IOMemoryDescriptor::initialize();
 154
 155     obj = OSString::withCString( version );
 156     assert( obj );
 157     if( obj ) {
 158         root->setProperty( kIOKitBuildVersionKey, obj );
 159         obj->release();
 160     }
 161     obj = IOKitDiagnostics::diagnostics();
 162     if( obj ) {
 163         root->setProperty( kIOKitDiagnosticsKey, obj );
 164         obj->release();
 165     }
 166
 167     rootNub = new IOPlatformExpertDevice;
 168
 169     if( rootNub && rootNub->initWithArgs( p1, p2, p3, p4)) {
 170         rootNub->attach( 0 );
 171
 172        /* Enter into the catalogue the drivers
 173         * provided by BootX.
 174         */
 175         gIOCatalogue->recordStartupExtensions();
 176
 177         rootNub->registerService();
 178     }
 179 }
 180
 181 }; /* extern "C" */