ArmPkg/ArmCpuLib: Replaced complex functions ArmCpuSynchronizeWait & ArmCpuSynchronizeSignal by sev & wfe

Previsouly the synchronization of MpCore was using the SGI (Software
Generated Interrupt) to synchronize MpCore during the early boot.
This commit replaced this mechanism by the more appropriate SEV/WFE
instructions (Send/Wait Event instructions).
That also eases the port to a new cpu/platform.

Signed-off-by: Olivier Martin <olivier.martin@arm.com>



git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@13249 6f19259b-4bc3-4df7-8a09-765794883524

ArmPkg/Drivers/ArmCpuLib/ArmCortexA15Lib/ArmCortexA15Lib.inf

@@ -1,5 +1,5 @@
 #/* @file
-#  Copyright (c) 2011, ARM Limited. All rights reserved.
+#  Copyright (c) 2011-2012, ARM Limited. All rights reserved.
 #  
 #  This program and the accompanying materials                          
 #  are licensed and made available under the terms and conditions of the BSD License         
@@ -25,14 +25,11 @@
 
 [LibraryClasses]
   ArmLib
-  ArmGicSecLib
   IoLib
   PcdLib
 
 [Sources.common]
   ArmCortexA15Lib.c
-  ArmCortexA15Helper.asm     | RVCT
-  ArmCortexA15Helper.S       | GCC
 
 [FeaturePcd]
 
@@ -40,7 +37,4 @@
   gArmTokenSpaceGuid.PcdArmPrimaryCoreMask
   gArmTokenSpaceGuid.PcdArmPrimaryCore
 
-  gArmTokenSpaceGuid.PcdGicDistributorBase
-  gArmTokenSpaceGuid.PcdGicInterruptInterfaceBase
-
   gArmTokenSpaceGuid.PcdArmArchTimerFreqInHz