iokit/Kernel/IOStartIOKit.cpp

   1 /*
   2  * Copyright (c) 1998-2000 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
  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 #endif
  71
  72     clock_initialize_calendar();
  73 }
  74
  75 // From <osfmk/kern/debug.c>
  76 extern int debug_mode;
  77
  78 void StartIOKit( void * p1, void * p2, void * p3, void * p4 )
  79 {
  80     IOPlatformExpertDevice *    rootNub;
  81     int                         debugFlags;
  82     IORegistryEntry *           root;
  83     OSObject *                  obj;
  84     extern const char *         gIOKernelKmods;
  85     OSString *                  errorString = NULL; // must release
  86     OSDictionary *              fakeKmods;  // must release
  87     OSCollectionIterator *      kmodIter;   // must release
  88     OSString *                  kmodName;   // don't release
  89
  90     if( PE_parse_boot_arg( "io", &debugFlags ))
  91         gIOKitDebug = debugFlags;
  92
  93     // Check for the log synchronous bit set in io
  94     if (gIOKitDebug & kIOLogSynchronous)
  95         debug_mode = true;
  96
  97     //
  98     // Have to start IOKit environment before we attempt to start
  99     // the C++ runtime environment.  At some stage we have to clean up
 100     // the initialisation path so that OS C++ can initialise independantly
 101     // of iokit basic service initialisation, or better we have IOLib stuff
 102     // initialise as basic OS services.
 103     //
 104     IOLibInit();
 105     OSlibkernInit();
 106
 107    /*****
 108     * Declare the fake kmod_info structs for built-in components
 109     * that must be tracked as independent units for dependencies.
 110     */
 111     fakeKmods = OSDynamicCast(OSDictionary,
 112         OSUnserialize(gIOKernelKmods, &errorString));
 113
 114     if (!fakeKmods) {
 115         if (errorString) {
 116             panic("Kernel kmod list syntax error: %s\n",
 117                     errorString->getCStringNoCopy());
 118             errorString->release();
 119         } else {
 120             panic("Error loading kernel kmod list.\n");
 121         }
 122     }
 123
 124     kmodIter = OSCollectionIterator::withCollection(fakeKmods);
 125     if (!kmodIter) {
 126         panic("Can't declare in-kernel kmods.\n");
 127     }
 128     while ((kmodName = OSDynamicCast(OSString, kmodIter->getNextObject()))) {
 129
 130         OSString * kmodVersion = OSDynamicCast(OSString,
 131             fakeKmods->getObject(kmodName));
 132         if (!kmodVersion) {
 133             panic("Can't declare in-kernel kmod; \"%s\" has "
 134                 "an invalid version.\n",
 135                 kmodName->getCStringNoCopy());
 136         }
 137
 138         // empty version strings get replaced with current kernel version
 139         const char *vers = (strlen(kmodVersion->getCStringNoCopy())
 140                                  ? kmodVersion->getCStringNoCopy()
 141                                  : osrelease);
 142
 143         if (KERN_SUCCESS != kmod_create_fake(kmodName->getCStringNoCopy(), vers)) {
 144             panic("Failure declaring in-kernel kmod \"%s\".\n",
 145                 kmodName->getCStringNoCopy());
 146         }
 147     }
 148
 149     kmodIter->release();
 150     fakeKmods->release();
 151
 152
 153
 154     root = IORegistryEntry::initialize();
 155     assert( root );
 156     IOService::initialize();
 157     IOCatalogue::initialize();
 158     IOUserClient::initialize();
 159     IOMemoryDescriptor::initialize();
 160
 161     obj = OSString::withCString( version );
 162     assert( obj );
 163     if( obj ) {
 164         root->setProperty( kIOKitBuildVersionKey, obj );
 165         obj->release();
 166     }
 167     obj = IOKitDiagnostics::diagnostics();
 168     if( obj ) {
 169         root->setProperty( kIOKitDiagnosticsKey, obj );
 170         obj->release();
 171     }
 172
 173     rootNub = new IOPlatformExpertDevice;
 174
 175     if( rootNub && rootNub->initWithArgs( p1, p2, p3, p4)) {
 176         rootNub->attach( 0 );
 177
 178        /* Enter into the catalogue the drivers
 179         * provided by BootX.
 180         */
 181         gIOCatalogue->recordStartupExtensions();
 182
 183         rootNub->registerService();
 184     }
 185 }
 186
 187 }; /* extern "C" */