iokit/Kernel/IOStartIOKit.cpp

   1 /*
   2  * Copyright (c) 1998-2005 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
  59 void IOKitResetTime( void )
  60 {
  61         mach_timespec_t         t;
  62
  63         t.tv_sec = 30;
  64         t.tv_nsec = 0;
  65         IOService::waitForService(
  66                 IOService::resourceMatching("IORTC"), &t );
  67 #ifndef i386
  68         IOService::waitForService(
  69                 IOService::resourceMatching("IONVRAM"), &t );
  70
  71 #endif
  72
  73     clock_initialize_calendar();
  74 }
  75
  76 // From <osfmk/kern/debug.c>
  77 extern int debug_mode;
  78
  79 void StartIOKit( void * p1, void * p2, void * p3, void * p4 )
  80 {
  81     IOPlatformExpertDevice *    rootNub;
  82     int                         debugFlags;
  83     IORegistryEntry *           root;
  84     OSObject *                  obj;
  85     extern const char *         gIOKernelKmods;
  86     OSString *                  errorString = NULL; // must release
  87     OSDictionary *              fakeKmods;  // must release
  88     OSCollectionIterator *      kmodIter;   // must release
  89     OSString *                  kmodName;   // don't release
  90
  91     if( PE_parse_boot_arg( "io", &debugFlags ))
  92         gIOKitDebug = debugFlags;
  93
  94     // Check for the log synchronous bit set in io
  95     if (gIOKitDebug & kIOLogSynchronous)
  96         debug_mode = true;
  97
  98     //
  99     // Have to start IOKit environment before we attempt to start
 100     // the C++ runtime environment.  At some stage we have to clean up
 101     // the initialisation path so that OS C++ can initialise independantly
 102     // of iokit basic service initialisation, or better we have IOLib stuff
 103     // initialise as basic OS services.
 104     //
 105     IOLibInit();
 106     OSlibkernInit();
 107
 108    /*****
 109     * Declare the fake kmod_info structs for built-in components
 110     * that must be tracked as independent units for dependencies.
 111     */
 112     fakeKmods = OSDynamicCast(OSDictionary,
 113         OSUnserialize(gIOKernelKmods, &errorString));
 114
 115     if (!fakeKmods) {
 116         if (errorString) {
 117             panic("Kernel kmod list syntax error: %s\n",
 118                     errorString->getCStringNoCopy());
 119             errorString->release();
 120         } else {
 121             panic("Error loading kernel kmod list.\n");
 122         }
 123     }
 124
 125     kmodIter = OSCollectionIterator::withCollection(fakeKmods);
 126     if (!kmodIter) {
 127         panic("Can't declare in-kernel kmods.\n");
 128     }
 129     while ((kmodName = OSDynamicCast(OSString, kmodIter->getNextObject()))) {
 130
 131         OSString * kmodVersion = OSDynamicCast(OSString,
 132             fakeKmods->getObject(kmodName));
 133         if (!kmodVersion) {
 134             panic("Can't declare in-kernel kmod; \"%s\" has "
 135                 "an invalid version.\n",
 136                 kmodName->getCStringNoCopy());
 137         }
 138
 139         // empty version strings get replaced with current kernel version
 140         const char *vers = (strlen(kmodVersion->getCStringNoCopy())
 141                                  ? kmodVersion->getCStringNoCopy()
 142                                  : osrelease);
 143
 144         if (KERN_SUCCESS != kmod_create_fake(kmodName->getCStringNoCopy(), vers)) {
 145             panic("Failure declaring in-kernel kmod \"%s\".\n",
 146                 kmodName->getCStringNoCopy());
 147         }
 148     }
 149
 150     kmodIter->release();
 151     fakeKmods->release();
 152
 153
 154
 155     root = IORegistryEntry::initialize();
 156     assert( root );
 157     IOService::initialize();
 158     IOCatalogue::initialize();
 159     IOUserClient::initialize();
 160     IOMemoryDescriptor::initialize();
 161
 162     // Initializes IOPMinformeeList class-wide shared lock
 163     IOPMinformeeList::getSharedRecursiveLock();
 164
 165     obj = OSString::withCString( version );
 166     assert( obj );
 167     if( obj ) {
 168         root->setProperty( kIOKitBuildVersionKey, obj );
 169         obj->release();
 170     }
 171     obj = IOKitDiagnostics::diagnostics();
 172     if( obj ) {
 173         root->setProperty( kIOKitDiagnosticsKey, obj );
 174         obj->release();
 175     }
 176
 177     rootNub = new IOPlatformExpertDevice;
 178
 179     if( rootNub && rootNub->initWithArgs( p1, p2, p3, p4)) {
 180         rootNub->attach( 0 );
 181
 182        /* Enter into the catalogue the drivers
 183         * provided by BootX.
 184         */
 185         gIOCatalogue->recordStartupExtensions();
 186
 187         rootNub->registerService();
 188     }
 189 }
 190
 191 }; /* extern "C" */