MdeModulePkg/Core/Dxe: Initialized CPU Architectural Protocol immediately after initializing GCD Services.

Initialized Multi-processor support after calling 
ProcessLibraryConstructorList() because of its dependency on TimerLib.

MdeModulePkg/Core/Dxe/DxeMain/DxeMain.c

@@ -306,6 +306,24 @@ DxeMain (
   Status = CoreInitializeGcdServices (&HobStart, MemoryBaseAddress, MemoryLength);
   ASSERT_EFI_ERROR (Status);
 
+  //
+  // Initialize the Event Services
+  //
+  Status = CoreInitializeEventServices ();
+  ASSERT_EFI_ERROR (Status);
+
+  //
+  // Register for the GUIDs of the Architectural Protocols, so the rest of the
+  // EFI Boot Services and EFI Runtime Services tables can be filled in.
+  // Also register for the GUIDs of optional protocols.
+  //
+  CoreNotifyOnProtocolInstallation ();
+
+  //
+  // Initialize CPU Architectural Protocol
+  //
+  InitializeCpu ();
+
   //
   // Call constructor for all libraries
   //
@@ -313,6 +331,11 @@ DxeMain (
   PERF_CROSSMODULE_END ("PEI");
   PERF_CROSSMODULE_BEGIN ("DXE");
 
+  //
+  // Initialize Multi-processor support
+  //
+  InitializeMpSupport ();
+
   //
   // Log MemoryBaseAddress and MemoryLength again (from
   // CoreInitializeMemoryServices()), now that library constructors have
@@ -435,12 +458,6 @@ DxeMain (
 
   DEBUG_CODE_END ();
 
-  //
-  // Initialize the Event Services
-  //
-  Status = CoreInitializeEventServices ();
-  ASSERT_EFI_ERROR (Status);
-
   MemoryProfileInstallProtocol ();
 
   CoreInitializeMemoryAttributesTable ();
@@ -489,13 +506,6 @@ DxeMain (
              );
   ASSERT_EFI_ERROR (Status);
 
-  //
-  // Register for the GUIDs of the Architectural Protocols, so the rest of the
-  // EFI Boot Services and EFI Runtime Services tables can be filled in.
-  // Also register for the GUIDs of optional protocols.
-  //
-  CoreNotifyOnProtocolInstallation ();
-
   //
   // Produce Firmware Volume Protocols, one for each FV in the HOB list.
   //
@@ -516,11 +526,6 @@ DxeMain (
   //
   CoreInitializeDispatcher ();
 
-  //
-  // Initialize CPU Architectural Protocol
-  //
-  InitializeCpu ();
-
   //
   // Invoke the DXE Dispatcher
   //

UefiCpuPkg/Include/Library/CpuArchLib.h

@@ -19,4 +19,13 @@ InitializeCpu (
   VOID
   );
 
+/**
+  Initialize Multi-processor support.
+
+**/
+VOID
+InitializeMpSupport (
+  VOID
+  );
+
 #endif // _CPU_ARCH_LIB_H_

UefiCpuPkg/Library/CpuArchLib/CpuDxe.c

@@ -1280,7 +1280,5 @@ InitializeCpu (
                   );
   ASSERT_EFI_ERROR (Status);
 
-  InitializeMpSupport ();
-
   return Status;
 }

UefiCpuPkg/Library/CpuArchLib/CpuDxeNull.c

@@ -1,7 +1,9 @@
 /**
-  Dummy function for DxeMain.inf.
+  Initialize the state information for the CPU Architectural Protocol.
 
   @retval EFI_SUCCESS           Thread can be successfully created
+  @retval EFI_OUT_OF_RESOURCES  Can not allocate protocol data structure
+  @retval EFI_DEVICE_ERROR      Can not create the thread
 **/
 EFI_STATUS
 InitializeCpu (
@@ -10,3 +12,14 @@ InitializeCpu (
 {
   return EFI_SUCCESS;
 }
+
+/**
+  Initialize Multi-processor support.
+
+**/
+VOID
+InitializeMpSupport (
+  VOID
+  )
+{
+}

UefiCpuPkg/Library/CpuArchLib/CpuMp.h

@@ -9,15 +9,6 @@
 #ifndef _CPU_MP_H_
 #define _CPU_MP_H_
 
-/**
-  Initialize Multi-processor support.
-
-**/
-VOID
-InitializeMpSupport (
-  VOID
-  );
-
 /**
   This service retrieves the number of logical processor in the platform
   and the number of those logical processors that are enabled on this boot.