iokit/Kernel/IOStartIOKit.cpp

   1 /*
   2  * Copyright (c) 1998-2006 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
  56 #include <kern/clock.h>
  57 #include <sys/time.h>
  58
  59 void IOKitInitializeTime( 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 #ifdef ppc
  68         IOService::waitForService(
  69                 IOService::resourceMatching("IONVRAM"), &t );
  70 #endif
  71
  72     clock_initialize_calendar();
  73 }
  74
  75 void IOKitResetTime( void )
  76 {
  77     uint32_t secs, microsecs;
  78
  79     clock_initialize_calendar();
  80
  81     clock_get_calendar_microtime(&secs, &microsecs);
  82     gIOLastWakeTime.tv_sec  = secs;
  83     gIOLastWakeTime.tv_usec = microsecs;
  84 }
  85
  86
  87 // From <osfmk/kern/debug.c>
  88 extern int debug_mode;
  89
  90 void StartIOKit( void * p1, void * p2, void * p3, void * p4 )
  91 {
  92     IOPlatformExpertDevice *    rootNub;
  93     int                         debugFlags;
  94     IORegistryEntry *           root;
  95     OSObject *                  obj;
  96     extern const char *         gIOKernelKmods;
  97     OSString *                  errorString = NULL; // must release
  98     OSDictionary *              fakeKmods;  // must release
  99     OSCollectionIterator *      kmodIter;   // must release
 100     OSString *                  kmodName;   // don't release
 101
 102     if( PE_parse_boot_argn( "io", &debugFlags, sizeof (debugFlags) ))
 103         gIOKitDebug = debugFlags;
 104
 105     // Check for the log synchronous bit set in io
 106     if (gIOKitDebug & kIOLogSynchronous)
 107         debug_mode = true;
 108
 109     //
 110     // Have to start IOKit environment before we attempt to start
 111     // the C++ runtime environment.  At some stage we have to clean up
 112     // the initialisation path so that OS C++ can initialise independantly
 113     // of iokit basic service initialisation, or better we have IOLib stuff
 114     // initialise as basic OS services.
 115     //
 116     IOLibInit();
 117     OSlibkernInit();
 118
 119    /*****
 120     * Declare the fake kmod_info structs for built-in components
 121     * that must be tracked as independent units for dependencies.
 122     */
 123     fakeKmods = OSDynamicCast(OSDictionary,
 124         OSUnserialize(gIOKernelKmods, &errorString));
 125
 126     if (!fakeKmods) {
 127         if (errorString) {
 128             panic("Kernel kmod list syntax error: %s\n",
 129                     errorString->getCStringNoCopy());
 130             errorString->release();
 131         } else {
 132             panic("Error loading kernel kmod list.\n");
 133         }
 134     }
 135
 136     kmodIter = OSCollectionIterator::withCollection(fakeKmods);
 137     if (!kmodIter) {
 138         panic("Can't declare in-kernel kmods.\n");
 139     }
 140     while ((kmodName = OSDynamicCast(OSString, kmodIter->getNextObject()))) {
 141
 142         OSString * kmodVersion = OSDynamicCast(OSString,
 143             fakeKmods->getObject(kmodName));
 144         if (!kmodVersion) {
 145             panic("Can't declare in-kernel kmod; \"%s\" has "
 146                 "an invalid version.\n",
 147                 kmodName->getCStringNoCopy());
 148         }
 149
 150         // empty version strings get replaced with current kernel version
 151         const char *vers = (strlen(kmodVersion->getCStringNoCopy())
 152                                  ? kmodVersion->getCStringNoCopy()
 153                                  : osrelease);
 154
 155         if (KERN_SUCCESS != kmod_create_fake(kmodName->getCStringNoCopy(), vers)) {
 156             panic("Failure declaring in-kernel kmod \"%s\".\n",
 157                 kmodName->getCStringNoCopy());
 158         }
 159     }
 160
 161     kmodIter->release();
 162     fakeKmods->release();
 163
 164
 165
 166     root = IORegistryEntry::initialize();
 167     assert( root );
 168     IOService::initialize();
 169     IOCatalogue::initialize();
 170     IOUserClient::initialize();
 171     IOMemoryDescriptor::initialize();
 172
 173     // Initializes IOPMinformeeList class-wide shared lock
 174     IOPMinformeeList::getSharedRecursiveLock();
 175
 176     obj = OSString::withCString( version );
 177     assert( obj );
 178     if( obj ) {
 179         root->setProperty( kIOKitBuildVersionKey, obj );
 180         obj->release();
 181     }
 182     obj = IOKitDiagnostics::diagnostics();
 183     if( obj ) {
 184         root->setProperty( kIOKitDiagnosticsKey, obj );
 185         obj->release();
 186     }
 187
 188     rootNub = new IOPlatformExpertDevice;
 189
 190     if( rootNub && rootNub->initWithArgs( p1, p2, p3, p4)) {
 191         rootNub->attach( 0 );
 192
 193        /* Enter into the catalogue the drivers
 194         * provided by BootX.
 195         */
 196         gIOCatalogue->recordStartupExtensions();
 197
 198         rootNub->registerService();
 199
 200 #if !NO_KEXTD
 201        /* Add a busy count to keep the registry busy until kextd has
 202         * completely finished launching. This is decremented when kextd
 203         * messages the kernel after the in-kernel linker has been
 204         * removed and personalities have been sent.
 205         */
 206         IOService::getServiceRoot()->adjustBusy(1);
 207 #endif
 208     }
 209 }
 210
 211 void
 212 IORegistrySetOSBuildVersion(char * build_version)
 213 {
 214     IORegistryEntry * root = IORegistryEntry::getRegistryRoot();
 215
 216     if (root) {
 217         if (build_version) {
 218             root->setProperty(kOSBuildVersionKey, build_version);
 219         } else {
 220             root->removeProperty(kOSBuildVersionKey);
 221         }
 222     }
 223
 224     return;
 225 }
 226
 227 }; /* extern "C" */