iokit/Kernel/IOStartIOKit.cpp

   1 /*
   2  * Copyright (c) 1998-2005 Apple Computer, Inc. All rights reserved.
   3  *
   4  * @APPLE_LICENSE_OSREFERENCE_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
  10  * License may not be used to create, or enable the creation or
  11  * redistribution of, unlawful or unlicensed copies of an Apple operating
  12  * system, or to circumvent, violate, or enable the circumvention or
  13  * violation of, any terms of an Apple operating system software license
  14  * agreement.
  15  *
  16  * Please obtain a copy of the License at
  17  * http://www.opensource.apple.com/apsl/ and read it before using this
  18  * file.
  19  *
  20  * The Original Code and all software distributed under the License are
  21  * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
  22  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
  23  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
  24  * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
  25  * Please see the License for the specific language governing rights and
  26  * limitations under the License.
  27  *
  28  * @APPLE_LICENSE_OSREFERENCE_HEADER_END@
  29  */
  30 /*
  31  * Copyright (c) 1998,1999 Apple Computer, Inc.  All rights reserved.
  32  *
  33  * HISTORY
  34  *
  35  */
  36
  37 #include <libkern/c++/OSUnserialize.h>
  38 #include <libkern/version.h>
  39 #include <IOKit/IORegistryEntry.h>
  40 #include <IOKit/IODeviceTreeSupport.h>
  41 #include <IOKit/IOCatalogue.h>
  42 #include <IOKit/IOUserClient.h>
  43 #include <IOKit/IOMemoryDescriptor.h>
  44 #include <IOKit/IOPlatformExpert.h>
  45 #include <IOKit/IOLib.h>
  46 #include <IOKit/IOKitKeys.h>
  47 #include <IOKit/IOKitDebug.h>
  48
  49 #include <IOKit/assert.h>
  50
  51 #include "IOKitKernelInternal.h"
  52
  53 extern "C" {
  54
  55 extern void OSlibkernInit (void);
  56 extern void ml_hpet_cfg(uint32_t, uint32_t);
  57
  58 #include <kern/clock.h>
  59
  60 void IOKitResetTime( 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 #ifndef i386
  69         IOService::waitForService(
  70                 IOService::resourceMatching("IONVRAM"), &t );
  71
  72 #endif
  73
  74     clock_initialize_calendar();
  75 }
  76
  77 // From <osfmk/kern/debug.c>
  78 extern int debug_mode;
  79
  80 void StartIOKit( void * p1, void * p2, void * p3, void * p4 )
  81 {
  82     IOPlatformExpertDevice *    rootNub;
  83     int                         debugFlags;
  84     IORegistryEntry *           root;
  85     OSObject *                  obj;
  86     extern const char *         gIOKernelKmods;
  87     OSString *                  errorString = NULL; // must release
  88     OSDictionary *              fakeKmods;  // must release
  89     OSCollectionIterator *      kmodIter;   // must release
  90     OSString *                  kmodName;   // don't release
  91
  92     if( PE_parse_boot_arg( "io", &debugFlags ))
  93         gIOKitDebug = debugFlags;
  94
  95     // Check for the log synchronous bit set in io
  96     if (gIOKitDebug & kIOLogSynchronous)
  97         debug_mode = true;
  98
  99     //
 100     // Have to start IOKit environment before we attempt to start
 101     // the C++ runtime environment.  At some stage we have to clean up
 102     // the initialisation path so that OS C++ can initialise independantly
 103     // of iokit basic service initialisation, or better we have IOLib stuff
 104     // initialise as basic OS services.
 105     //
 106     IOLibInit();
 107     OSlibkernInit();
 108
 109    /*****
 110     * Declare the fake kmod_info structs for built-in components
 111     * that must be tracked as independent units for dependencies.
 112     */
 113     fakeKmods = OSDynamicCast(OSDictionary,
 114         OSUnserialize(gIOKernelKmods, &errorString));
 115
 116     if (!fakeKmods) {
 117         if (errorString) {
 118             panic("Kernel kmod list syntax error: %s\n",
 119                     errorString->getCStringNoCopy());
 120             errorString->release();
 121         } else {
 122             panic("Error loading kernel kmod list.\n");
 123         }
 124     }
 125
 126     kmodIter = OSCollectionIterator::withCollection(fakeKmods);
 127     if (!kmodIter) {
 128         panic("Can't declare in-kernel kmods.\n");
 129     }
 130     while ((kmodName = OSDynamicCast(OSString, kmodIter->getNextObject()))) {
 131
 132         OSString * kmodVersion = OSDynamicCast(OSString,
 133             fakeKmods->getObject(kmodName));
 134         if (!kmodVersion) {
 135             panic("Can't declare in-kernel kmod; \"%s\" has "
 136                 "an invalid version.\n",
 137                 kmodName->getCStringNoCopy());
 138         }
 139
 140         // empty version strings get replaced with current kernel version
 141         const char *vers = (strlen(kmodVersion->getCStringNoCopy())
 142                                  ? kmodVersion->getCStringNoCopy()
 143                                  : osrelease);
 144
 145         if (KERN_SUCCESS != kmod_create_fake(kmodName->getCStringNoCopy(), vers)) {
 146             panic("Failure declaring in-kernel kmod \"%s\".\n",
 147                 kmodName->getCStringNoCopy());
 148         }
 149     }
 150
 151     kmodIter->release();
 152     fakeKmods->release();
 153
 154
 155
 156     root = IORegistryEntry::initialize();
 157     assert( root );
 158     IOService::initialize();
 159     IOCatalogue::initialize();
 160     IOUserClient::initialize();
 161     IOMemoryDescriptor::initialize();
 162
 163     obj = OSString::withCString( version );
 164     assert( obj );
 165     if( obj ) {
 166         root->setProperty( kIOKitBuildVersionKey, obj );
 167         obj->release();
 168     }
 169     obj = IOKitDiagnostics::diagnostics();
 170     if( obj ) {
 171         root->setProperty( kIOKitDiagnosticsKey, obj );
 172         obj->release();
 173     }
 174
 175     rootNub = new IOPlatformExpertDevice;
 176
 177     if( rootNub && rootNub->initWithArgs( p1, p2, p3, p4)) {
 178         rootNub->attach( 0 );
 179
 180        /* Enter into the catalogue the drivers
 181         * provided by BootX.
 182         */
 183         gIOCatalogue->recordStartupExtensions();
 184
 185         rootNub->registerService();
 186     }
 187 }
 188
 189 }; /* extern "C" */