diff --git a/ArmPkg/Library/ArmLib/ArmV7/ArmV7Mmu.c b/ArmPkg/Library/ArmLib/ArmV7/ArmV7Mmu.c
index b2cfdba900..2e39ce00fe 100644
--- a/ArmPkg/Library/ArmLib/ArmV7/ArmV7Mmu.c
+++ b/ArmPkg/Library/ArmLib/ArmV7/ArmV7Mmu.c
@@ -147,11 +147,18 @@ FillTranslationTable (
 {
   UINT32  *SectionEntry;
   UINT32  Attributes;
-  UINT32  PhysicalBase = MemoryRegion->PhysicalBase;
-  UINT32  RemainLength = MemoryRegion->Length;
+  UINT32  PhysicalBase;
+  UINT32  RemainLength;
 
   ASSERT(MemoryRegion->Length > 0);
 
+  if (MemoryRegion->PhysicalBase >= SIZE_4GB) {
+    return;
+  }
+
+  PhysicalBase = MemoryRegion->PhysicalBase;
+  RemainLength = MIN(MemoryRegion->Length, SIZE_4GB - PhysicalBase);
+
   switch (MemoryRegion->Attributes) {
     case ARM_MEMORY_REGION_ATTRIBUTE_WRITE_BACK:
       Attributes = TT_DESCRIPTOR_SECTION_WRITE_BACK(0);