ArmPkg: Invalidate cache after allocating UC memory

It is implied that the memory returned from UncachedMemoryAllocationLib
should have cache invalidated. So we invalidate memory range after
changing memory attribute to uncached.

Contributed-under: TianoCore Contribution Agreement 1.0
Signed-off-by: Heyi Guo <heyi.guo@linaro.org>
Reviewed-by: Ard Biesheuvel <ard.biesheuvel@linaro.org>

git-svn-id: https://svn.code.sf.net/p/edk2/code/trunk/edk2@18920 6f19259b-4bc3-4df7-8a09-765794883524

ArmPkg/Library/UncachedMemoryAllocationLib/UncachedMemoryAllocationLib.c

@@ -25,6 +25,7 @@
 #include <Library/PcdLib.h>
 #include <Library/ArmLib.h>
 #include <Library/DxeServicesTableLib.h>
+#include <Library/CacheMaintenanceLib.h>
 
 VOID *
 UncachedInternalAllocatePages (
@@ -165,6 +166,8 @@ AllocatePagesFromList (
     return Status;
   }
 
+  InvalidateDataCacheRange ((VOID *)(UINTN)Memory, EFI_PAGES_TO_SIZE (Pages));
+
   NewNode = AllocatePool (sizeof (FREE_PAGE_NODE));
   if (NewNode == NULL) {
     ASSERT (FALSE);