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/Include/Library/ArmCpuLib.h

@@ -1,6 +1,6 @@
 /** @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
@@ -15,24 +15,6 @@
 #ifndef __ARMCPU_LIB__
 #define __ARMCPU_LIB__
 
-// These are #define and not enum to be used in assembly files
-#define ARM_CPU_EVENT_DEFAULT         0
-#define ARM_CPU_EVENT_BOOT_MEM_INIT   1
-#define ARM_CPU_EVENT_SECURE_INIT     2
-
-typedef UINTN ARM_CPU_SYNCHRONIZE_EVENT;
-
-
-VOID
-ArmCpuSynchronizeWait (
-  IN ARM_CPU_SYNCHRONIZE_EVENT   Event
-  );
-
-VOID
-ArmCpuSynchronizeSignal (
-  IN ARM_CPU_SYNCHRONIZE_EVENT   Event
-  );
-
 VOID
 ArmCpuSetup (
   IN  UINTN         MpId

ArmPkg/Include/Library/ArmLib.h

@@ -438,6 +438,16 @@ ArmSetAuxCrBit (
 
 VOID
 EFIAPI
+ArmCallSEV (
+  VOID
+  );
+
+VOID
+EFIAPI
+ArmCallWFE (
+  VOID
+  );
+
 ArmCallWFI (
   VOID
   );