UefiCpuPkg/CpuDxe: Put CPU to sleep during Idle events

When the MdeModulePkg gCoreEventIdleGuid event is signaled,
CpuSleep is called.  This will cause the CPU to sleep until
the next interrupt occurs.

Signed-off-by: jljusten
Reviewed-by: mdkinney
Reviewed-by: rsun3

git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@11842 6f19259b-4bc3-4df7-8a09-765794883524

UefiCpuPkg/CpuDxe/CpuDxe.inf

@@ -2,7 +2,7 @@
 #
 #    Component description file for simple CPU driver
 #
-#  Copyright (c) 2008 - 2010, Intel Corporation. All rights reserved.<BR>
+#  Copyright (c) 2008 - 2011, Intel Corporation. All rights reserved.<BR>
 #  This program and the accompanying materials
 #  are licensed and made available under the terms and conditions of the BSD License
 #  which accompanies this distribution.  The full text of the license may be found at
@@ -24,6 +24,7 @@
 
 [Packages]
   MdePkg/MdePkg.dec
+  MdeModulePkg/MdeModulePkg.dec
   UefiCpuPkg/UefiCpuPkg.dec
 
 [LibraryClasses]
@@ -59,6 +60,9 @@
 [Protocols]
   gEfiCpuArchProtocolGuid
 
+[Guids]
+  gIdleLoopEventGuid                            ## CONSUMES ## GUID
+
 [Depex]
   TRUE