iokit/Kernel/IOStartIOKit.cpp

   1 /*
   2  * Copyright (c) 1998-2000 Apple Computer, Inc. All rights reserved.
   3  *
   4  * @APPLE_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. Please obtain a copy of the License at
  10  * http://www.opensource.apple.com/apsl/ and read it before using this
  11  * file.
  12  *
  13  * The Original Code and all software distributed under the License are
  14  * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
  15  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
  16  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
  17  * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
  18  * Please see the License for the specific language governing rights and
  19  * limitations under the License.
  20  *
  21  * @APPLE_LICENSE_HEADER_END@
  22  */
  23 /*
  24  * Copyright (c) 1998,1999 Apple Computer, Inc.  All rights reserved.
  25  *
  26  * HISTORY
  27  *
  28  */
  29
  30 #include <libkern/c++/OSUnserialize.h>
  31 #include <libkern/version.h>
  32 #include <IOKit/IORegistryEntry.h>
  33 #include <IOKit/IODeviceTreeSupport.h>
  34 #include <IOKit/IOCatalogue.h>
  35 #include <IOKit/IOUserClient.h>
  36 #include <IOKit/IOMemoryDescriptor.h>
  37 #include <IOKit/IOPlatformExpert.h>
  38 #include <IOKit/IOLib.h>
  39 #include <IOKit/IOKitKeys.h>
  40 #include <IOKit/IOKitDebug.h>
  41
  42 #include <IOKit/assert.h>
  43
  44 #include "IOKitKernelInternal.h"
  45
  46 extern "C" {
  47
  48 extern void OSlibkernInit (void);
  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 #endif
  64
  65     clock_initialize_calendar();
  66 }
  67
  68 // From <osfmk/kern/debug.c>
  69 extern int debug_mode;
  70
  71 void StartIOKit( void * p1, void * p2, void * p3, void * p4 )
  72 {
  73     IOPlatformExpertDevice *    rootNub;
  74     int                         debugFlags;
  75     IORegistryEntry *           root;
  76     OSObject *                  obj;
  77     extern const char *         gIOKernelKmods;
  78     OSString *                  errorString = NULL; // must release
  79     OSDictionary *              fakeKmods;  // must release
  80     OSCollectionIterator *      kmodIter;   // must release
  81     OSString *                  kmodName;   // don't release
  82
  83     if( PE_parse_boot_arg( "io", &debugFlags ))
  84         gIOKitDebug = debugFlags;
  85
  86     // Check for the log synchronous bit set in io
  87     if (gIOKitDebug & kIOLogSynchronous)
  88         debug_mode = true;
  89
  90     //
  91     // Have to start IOKit environment before we attempt to start
  92     // the C++ runtime environment.  At some stage we have to clean up
  93     // the initialisation path so that OS C++ can initialise independantly
  94     // of iokit basic service initialisation, or better we have IOLib stuff
  95     // initialise as basic OS services.
  96     //
  97     IOLibInit();
  98     OSlibkernInit();
  99
 100    /*****
 101     * Declare the fake kmod_info structs for built-in components
 102     * that must be tracked as independent units for dependencies.
 103     */
 104     fakeKmods = OSDynamicCast(OSDictionary,
 105         OSUnserialize(gIOKernelKmods, &errorString));
 106
 107     if (!fakeKmods) {
 108         if (errorString) {
 109             panic("Kernel kmod list syntax error: %s\n",
 110                     errorString->getCStringNoCopy());
 111             errorString->release();
 112         } else {
 113             panic("Error loading kernel kmod list.\n");
 114         }
 115     }
 116
 117     kmodIter = OSCollectionIterator::withCollection(fakeKmods);
 118     if (!kmodIter) {
 119         panic("Can't declare in-kernel kmods.\n");
 120     }
 121     while ((kmodName = OSDynamicCast(OSString, kmodIter->getNextObject()))) {
 122
 123         OSString * kmodVersion = OSDynamicCast(OSString,
 124             fakeKmods->getObject(kmodName));
 125         if (!kmodVersion) {
 126             panic("Can't declare in-kernel kmod; \"%s\" has "
 127                 "an invalid version.\n",
 128                 kmodName->getCStringNoCopy());
 129         }
 130
 131         // empty version strings get replaced with current kernel version
 132         const char *vers = (strlen(kmodVersion->getCStringNoCopy())
 133                                  ? kmodVersion->getCStringNoCopy()
 134                                  : osrelease);
 135
 136         if (KERN_SUCCESS != kmod_create_fake(kmodName->getCStringNoCopy(), vers)) {
 137             panic("Failure declaring in-kernel kmod \"%s\".\n",
 138                 kmodName->getCStringNoCopy());
 139         }
 140     }
 141
 142     kmodIter->release();
 143     fakeKmods->release();
 144
 145
 146
 147     root = IORegistryEntry::initialize();
 148     assert( root );
 149     IOService::initialize();
 150     IOCatalogue::initialize();
 151     IOUserClient::initialize();
 152     IOMemoryDescriptor::initialize();
 153
 154     obj = OSString::withCString( version );
 155     assert( obj );
 156     if( obj ) {
 157         root->setProperty( kIOKitBuildVersionKey, obj );
 158         obj->release();
 159     }
 160     obj = IOKitDiagnostics::diagnostics();
 161     if( obj ) {
 162         root->setProperty( kIOKitDiagnosticsKey, obj );
 163         obj->release();
 164     }
 165
 166     rootNub = new IOPlatformExpertDevice;
 167
 168     if( rootNub && rootNub->initWithArgs( p1, p2, p3, p4)) {
 169         rootNub->attach( 0 );
 170
 171        /* Enter into the catalogue the drivers
 172         * provided by BootX.
 173         */
 174         gIOCatalogue->recordStartupExtensions();
 175
 176         rootNub->registerService();
 177     }
 178 }
 179
 180 }; /* extern "C" */