--- xnu/xnu-3248.50.21/iokit/Kernel/IOStartIOKit.cpp
+++ xnu/xnu-1504.7.4/iokit/Kernel/IOStartIOKit.cpp
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 1998-2010 Apple Inc. All rights reserved.
+ * Copyright (c) 1998-2008 Apple Inc. All rights reserved.
  *
  * @APPLE_OSREFERENCE_LICENSE_HEADER_START@
  * 
@@ -25,6 +25,12 @@
  * 
  * @APPLE_OSREFERENCE_LICENSE_HEADER_END@
  */
+/*
+ * Copyright (c) 1998,1999 Apple Inc.  All rights reserved. 
+ *
+ * HISTORY
+ *
+ */
 
 #include <libkern/c++/OSUnserialize.h>
 #include <libkern/c++/OSKext.h>
@@ -38,24 +44,17 @@
 #include <IOKit/IOLib.h>
 #include <IOKit/IOKitKeys.h>
 #include <IOKit/IOKitDebug.h>
-#include <IOKit/pwr_mgt/RootDomain.h>
 #include <IOKit/pwr_mgt/IOPMinformeeList.h>
-#include <IOKit/IOStatisticsPrivate.h>
-#include <IOKit/IOKitKeysPrivate.h>
-#include <IOKit/IOInterruptAccountingPrivate.h>
 
 #include <IOKit/assert.h>
 
 #include "IOKitKernelInternal.h"
 
-const OSSymbol * gIOProgressBackbufferKey;
-OSSet *          gIORemoveOnReadProperties;
-
 extern "C" {
 
 extern void OSlibkernInit (void);
 
-void iokit_post_constructor_init(void);
+void iokit_post_constructor_init(void) __attribute__((section("__TEXT, initcode")));
 
 #include <kern/clock.h>
 #include <sys/time.h>
@@ -68,7 +67,7 @@
 	t.tv_nsec = 0;
 	IOService::waitForService(
 		IOService::resourceMatching("IORTC"), &t );
-#if defined(__i386__) || defined(__x86_64__)
+#ifdef ppc
 	IOService::waitForService(
 		IOService::resourceMatching("IONVRAM"), &t );
 #endif
@@ -76,21 +75,29 @@
     clock_initialize_calendar();
 }
 
+void IOKitResetTime( void )
+{
+    clock_sec_t		secs;
+	clock_usec_t	microsecs;
+
+    clock_initialize_calendar();
+
+    clock_get_calendar_microtime(&secs, &microsecs);
+    gIOLastWakeTime.tv_sec  = secs;
+    gIOLastWakeTime.tv_usec = microsecs;
+}
+
 void iokit_post_constructor_init(void)
 {
     IORegistryEntry *		root;
     OSObject *			obj;
 
-    IOCPUInitialize();
     root = IORegistryEntry::initialize();
     assert( root );
     IOService::initialize();
     IOCatalogue::initialize();
-    IOStatistics::initialize();
-    OSKext::initialize();
     IOUserClient::initialize();
     IOMemoryDescriptor::initialize();
-    IORootParent::initialize();
 
     // Initializes IOPMinformeeList class-wide shared lock
     IOPMinformeeList::getSharedRecursiveLock();
@@ -106,6 +113,7 @@
         root->setProperty( kIOKitDiagnosticsKey, obj );
 	obj->release();
     }
+
 }
 
 // From <osfmk/kern/debug.c>
@@ -123,22 +131,11 @@
 
     if( PE_parse_boot_argn( "io", &debugFlags, sizeof (debugFlags) ))
 	gIOKitDebug = debugFlags;
-#if DEVELOPMENT || DEBUG
-    else gIOKitDebug |= kIOWaitQuietPanics;
-#endif /* DEVELOPMENT || DEBUG */
-	
-    if( PE_parse_boot_argn( "iotrace", &debugFlags, sizeof (debugFlags) ))
-	gIOKitTrace = debugFlags;
-	
-    // Compat for boot-args
-    gIOKitTrace |= (gIOKitDebug & kIOTraceCompatBootArgs);
-	
+
     // Check for the log synchronous bit set in io
     if (gIOKitDebug & kIOLogSynchronous)
         debug_mode = true;
 
-    if( PE_parse_boot_argn( "pmtimeout", &debugFlags, sizeof (debugFlags) ))
-        gCanSleepTimeout = debugFlags;
     //
     // Have to start IOKit environment before we attempt to start
     // the C++ runtime environment.  At some stage we have to clean up
@@ -148,11 +145,6 @@
     //
     IOLibInit(); 
     OSlibkernInit();
-
-    gIOProgressBackbufferKey  = OSSymbol::withCStringNoCopy(kIOProgressBackbufferKey);
-    gIORemoveOnReadProperties = OSSet::withObjects((const OSObject **) &gIOProgressBackbufferKey, 1);
-
-    interruptAccountingInit();
 
     rootNub = new IOPlatformExpertDevice;
 
@@ -195,17 +187,4 @@
     return;
 }
 
-void
-IORecordProgressBackbuffer(void * buffer, size_t size, uint32_t theme)
-{
-    IORegistryEntry * chosen;
-    if ((chosen = IORegistryEntry::fromPath(kIODeviceTreePlane ":/chosen")))
-    {
-        chosen->setProperty(kIOProgressBackbufferKey, buffer, size);
-	chosen->setProperty(kIOProgressColorThemeKey, theme, 32);
-
-        chosen->release();
-    }
-}
-
 }; /* extern "C" */