iokit/Kernel/IOStartIOKit.cpp

   1 /*
   2  * Copyright (c) 1998-2000 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
  49 #include <kern/clock.h>
  50
  51 void IOKitResetTime( void )
  52 {
  53         mach_timespec_t         t;
  54
  55         t.tv_sec = 30;
  56         t.tv_nsec = 0;
  57         IOService::waitForService(
  58                 IOService::resourceMatching("IORTC"), &t );
  59 #ifndef i386
  60         IOService::waitForService(
  61                 IOService::resourceMatching("IONVRAM"), &t );
  62 #endif
  63
  64     clock_initialize_calendar();
  65 }
  66
  67 // From <osfmk/kern/debug.c>
  68 extern int debug_mode;
  69
  70 void StartIOKit( void * p1, void * p2, void * p3, void * p4 )
  71 {
  72     IOPlatformExpertDevice *    rootNub;
  73     int                         debugFlags;
  74     IORegistryEntry *           root;
  75     OSObject *                  obj;
  76     extern const char *         gIOKernelKmods;
  77     OSString *                  errorString = NULL; // must release
  78     OSDictionary *              fakeKmods;  // must release
  79     OSCollectionIterator *      kmodIter;   // must release
  80     OSString *                  kmodName;   // don't release
  81
  82     if( PE_parse_boot_arg( "io", &debugFlags ))
  83         gIOKitDebug = debugFlags;
  84
  85     // Check for the log synchronous bit set in io
  86     if (gIOKitDebug & kIOLogSynchronous)
  87         debug_mode = true;
  88
  89     //
  90     // Have to start IOKit environment before we attempt to start
  91     // the C++ runtime environment.  At some stage we have to clean up
  92     // the initialisation path so that OS C++ can initialise independantly
  93     // of iokit basic service initialisation, or better we have IOLib stuff
  94     // initialise as basic OS services.
  95     //
  96     IOLibInit();
  97     OSlibkernInit();
  98
  99    /*****
 100     * Declare the fake kmod_info structs for built-in components
 101     * that must be tracked as independent units for dependencies.
 102     */
 103     fakeKmods = OSDynamicCast(OSDictionary,
 104         OSUnserialize(gIOKernelKmods, &errorString));
 105
 106     if (!fakeKmods) {
 107         if (errorString) {
 108             panic("Kernel kmod list syntax error: %s\n",
 109                     errorString->getCStringNoCopy());
 110             errorString->release();
 111         } else {
 112             panic("Error loading kernel kmod list.\n");
 113         }
 114     }
 115
 116     kmodIter = OSCollectionIterator::withCollection(fakeKmods);
 117     if (!kmodIter) {
 118         panic("Can't declare in-kernel kmods.\n");
 119     }
 120     while ((kmodName = OSDynamicCast(OSString, kmodIter->getNextObject()))) {
 121
 122         OSString * kmodVersion = OSDynamicCast(OSString,
 123             fakeKmods->getObject(kmodName));
 124         if (!kmodVersion) {
 125             panic("Can't declare in-kernel kmod; \"%s\" has "
 126                 "an invalid version.\n",
 127                 kmodName->getCStringNoCopy());
 128         }
 129
 130         // empty version strings get replaced with current kernel version
 131         const char *vers = (strlen(kmodVersion->getCStringNoCopy())
 132                                  ? kmodVersion->getCStringNoCopy()
 133                                  : osrelease);
 134
 135         if (KERN_SUCCESS != kmod_create_fake(kmodName->getCStringNoCopy(), vers)) {
 136             panic("Failure declaring in-kernel kmod \"%s\".\n",
 137                 kmodName->getCStringNoCopy());
 138         }
 139     }
 140
 141     kmodIter->release();
 142     fakeKmods->release();
 143
 144
 145
 146     root = IORegistryEntry::initialize();
 147     assert( root );
 148     IOService::initialize();
 149     IOCatalogue::initialize();
 150     IOUserClient::initialize();
 151     IOMemoryDescriptor::initialize();
 152
 153     obj = OSString::withCString( version );
 154     assert( obj );
 155     if( obj ) {
 156         root->setProperty( kIOKitBuildVersionKey, obj );
 157         obj->release();
 158     }
 159     obj = IOKitDiagnostics::diagnostics();
 160     if( obj ) {
 161         root->setProperty( kIOKitDiagnosticsKey, obj );
 162         obj->release();
 163     }
 164
 165     rootNub = new IOPlatformExpertDevice;
 166
 167     if( rootNub && rootNub->initWithArgs( p1, p2, p3, p4)) {
 168         rootNub->attach( 0 );
 169
 170        /* Enter into the catalogue the drivers
 171         * provided by BootX.
 172         */
 173         gIOCatalogue->recordStartupExtensions();
 174
 175         rootNub->registerService();
 176     }
 177 }
 178
 179 }; /* extern "C" */