ArmPkg/CpuDxe: Added support to not set a memory region with the same attribute

Changing the attribute implies some cache management (clean & invalidate).
Preventing the cache management should improve the performance.

Contributed-under: TianoCore Contribution Agreement 1.0
Signed-off-by: Olivier Martin <olivier.martin@arm.com>



git-svn-id: https://svn.code.sf.net/p/edk2/code/trunk/edk2@14568 6f19259b-4bc3-4df7-8a09-765794883524

ArmPkg/Drivers/CpuDxe/CpuDxe.h

@@ -148,6 +148,19 @@ SetMemoryAttributes (
   IN EFI_PHYSICAL_ADDRESS      VirtualMask
   );
 
+// The ARM Attributes might be defined on 64-bit (case of the long format description table)
+UINT64
+EfiAttributeToArmAttribute (
+  IN UINT64                    EfiAttributes
+  );
+
+EFI_STATUS
+GetMemoryRegion (
+  IN OUT UINTN                   *BaseAddress,
+  OUT    UINTN                   *RegionLength,
+  OUT    UINTN                   *RegionAttributes
+  );
+
 VOID
 GetRootTranslationTableInfo (
   IN  UINTN    T0SZ,