diff --git a/MdeModulePkg/Core/Dxe/DxeMain.h b/MdeModulePkg/Core/Dxe/DxeMain.h
index 5668c1f2d648..1a0babba713a 100644
--- a/MdeModulePkg/Core/Dxe/DxeMain.h
+++ b/MdeModulePkg/Core/Dxe/DxeMain.h
@@ -123,31 +123,6 @@ WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
 ///
 #define DEPEX_STACK_SIZE_INCREMENT  0x1000
 
-#if defined (MDE_CPU_IPF)
-///
-/// For Itanium machines make the default allocations 8K aligned
-///
-#define EFI_ACPI_RUNTIME_PAGE_ALLOCATION_ALIGNMENT  (EFI_PAGE_SIZE * 2)
-#define DEFAULT_PAGE_ALLOCATION                     (EFI_PAGE_SIZE * 2)
-
-#elif defined (MDE_CPU_AARCH64)
-///
-/// 64-bit ARM systems allow the OS to execute with 64 KB page size,
-/// so for improved interoperability with the firmware, align the
-/// runtime regions to 64 KB as well
-///
-#define EFI_ACPI_RUNTIME_PAGE_ALLOCATION_ALIGNMENT  (SIZE_64KB)
-#define DEFAULT_PAGE_ALLOCATION                     (EFI_PAGE_SIZE)
-
-#else
-///
-/// For generic EFI machines make the default allocations 4K aligned
-///
-#define EFI_ACPI_RUNTIME_PAGE_ALLOCATION_ALIGNMENT  (EFI_PAGE_SIZE)
-#define DEFAULT_PAGE_ALLOCATION                     (EFI_PAGE_SIZE)
-
-#endif
-
 typedef struct {
   EFI_GUID                    *ProtocolGuid;
   VOID                        **Protocol;
diff --git a/MdeModulePkg/Core/Dxe/Mem/Page.c b/MdeModulePkg/Core/Dxe/Mem/Page.c
index 7e8fa94d7d4f..260a30a214c7 100644
--- a/MdeModulePkg/Core/Dxe/Mem/Page.c
+++ b/MdeModulePkg/Core/Dxe/Mem/Page.c
@@ -15,8 +15,6 @@ WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
 #include "DxeMain.h"
 #include "Imem.h"
 
-#define EFI_DEFAULT_PAGE_ALLOCATION_ALIGNMENT  (EFI_PAGE_SIZE)
-
 //
 // Entry for tracking the memory regions for each memory type to coalesce similar memory types
 //
@@ -287,12 +285,14 @@ AllocateMemoryMapEntry (
     //
     // The list is empty, to allocate one page to refuel the list
     //
-    FreeDescriptorEntries = CoreAllocatePoolPages (EfiBootServicesData, EFI_SIZE_TO_PAGES(DEFAULT_PAGE_ALLOCATION), DEFAULT_PAGE_ALLOCATION);
-    if(FreeDescriptorEntries != NULL) {
+    FreeDescriptorEntries = CoreAllocatePoolPages (EfiBootServicesData,
+                              EFI_SIZE_TO_PAGES (DEFAULT_PAGE_ALLOCATION_GRANULARITY),
+                              DEFAULT_PAGE_ALLOCATION_GRANULARITY);
+    if (FreeDescriptorEntries != NULL) {
       //
       // Enque the free memmory map entries into the list
       //
-      for (Index = 0; Index< DEFAULT_PAGE_ALLOCATION / sizeof(MEMORY_MAP); Index++) {
+      for (Index = 0; Index < DEFAULT_PAGE_ALLOCATION_GRANULARITY / sizeof(MEMORY_MAP); Index++) {
         FreeDescriptorEntries[Index].Signature = MEMORY_MAP_SIGNATURE;
         InsertTailList (&mFreeMemoryMapEntryList, &FreeDescriptorEntries[Index].Link);
       }
@@ -1222,14 +1222,14 @@ CoreInternalAllocatePages (
     return EFI_INVALID_PARAMETER;
   }
 
-  Alignment = EFI_DEFAULT_PAGE_ALLOCATION_ALIGNMENT;
+  Alignment = DEFAULT_PAGE_ALLOCATION_GRANULARITY;
 
   if  (MemoryType == EfiACPIReclaimMemory   ||
        MemoryType == EfiACPIMemoryNVS       ||
        MemoryType == EfiRuntimeServicesCode ||
        MemoryType == EfiRuntimeServicesData) {
 
-    Alignment = EFI_ACPI_RUNTIME_PAGE_ALLOCATION_ALIGNMENT;
+    Alignment = RUNTIME_PAGE_ALLOCATION_GRANULARITY;
   }
 
   if (Type == AllocateAddress) {
@@ -1398,7 +1398,7 @@ CoreInternalFreePages (
     goto Done;
   }
 
-  Alignment = EFI_DEFAULT_PAGE_ALLOCATION_ALIGNMENT;
+  Alignment = DEFAULT_PAGE_ALLOCATION_GRANULARITY;
 
   ASSERT (Entry != NULL);
   if  (Entry->Type == EfiACPIReclaimMemory   ||
@@ -1406,7 +1406,7 @@ CoreInternalFreePages (
        Entry->Type == EfiRuntimeServicesCode ||
        Entry->Type == EfiRuntimeServicesData) {
 
-    Alignment = EFI_ACPI_RUNTIME_PAGE_ALLOCATION_ALIGNMENT;
+    Alignment = RUNTIME_PAGE_ALLOCATION_GRANULARITY;
 
   }
 
@@ -1925,12 +1925,12 @@ CoreTerminateMemoryMap (
         if (mMemoryTypeStatistics[Entry->Type].Runtime) {
           ASSERT (Entry->Type != EfiACPIReclaimMemory);
           ASSERT (Entry->Type != EfiACPIMemoryNVS);
-          if ((Entry->Start & (EFI_ACPI_RUNTIME_PAGE_ALLOCATION_ALIGNMENT - 1)) != 0) {
+          if ((Entry->Start & (RUNTIME_PAGE_ALLOCATION_GRANULARITY - 1)) != 0) {
             DEBUG((DEBUG_ERROR | DEBUG_PAGE, "ExitBootServices: A RUNTIME memory entry is not on a proper alignment.\n"));
             Status =  EFI_INVALID_PARAMETER;
             goto Done;
           }
-          if (((Entry->End + 1) & (EFI_ACPI_RUNTIME_PAGE_ALLOCATION_ALIGNMENT - 1)) != 0) {
+          if (((Entry->End + 1) & (RUNTIME_PAGE_ALLOCATION_GRANULARITY - 1)) != 0) {
             DEBUG((DEBUG_ERROR | DEBUG_PAGE, "ExitBootServices: A RUNTIME memory entry is not on a proper alignment.\n"));
             Status =  EFI_INVALID_PARAMETER;
             goto Done;
diff --git a/MdeModulePkg/Core/Dxe/Mem/Pool.c b/MdeModulePkg/Core/Dxe/Mem/Pool.c
index ced64443c77d..5248ee2e6c02 100644
--- a/MdeModulePkg/Core/Dxe/Mem/Pool.c
+++ b/MdeModulePkg/Core/Dxe/Mem/Pool.c
@@ -352,9 +352,9 @@ CoreAllocatePoolI (
        PoolType == EfiRuntimeServicesCode ||
        PoolType == EfiRuntimeServicesData) {
 
-    Granularity = EFI_ACPI_RUNTIME_PAGE_ALLOCATION_ALIGNMENT;
+    Granularity = RUNTIME_PAGE_ALLOCATION_GRANULARITY;
   } else {
-    Granularity = DEFAULT_PAGE_ALLOCATION;
+    Granularity = DEFAULT_PAGE_ALLOCATION_GRANULARITY;
   }
 
   //
@@ -643,9 +643,9 @@ CoreFreePoolI (
        Head->Type == EfiRuntimeServicesCode ||
        Head->Type == EfiRuntimeServicesData) {
 
-    Granularity = EFI_ACPI_RUNTIME_PAGE_ALLOCATION_ALIGNMENT;
+    Granularity = RUNTIME_PAGE_ALLOCATION_GRANULARITY;
   } else {
-    Granularity = DEFAULT_PAGE_ALLOCATION;
+    Granularity = DEFAULT_PAGE_ALLOCATION_GRANULARITY;
   }
 
   if (PoolType != NULL) {
diff --git a/MdeModulePkg/Core/Dxe/Misc/MemoryAttributesTable.c b/MdeModulePkg/Core/Dxe/Misc/MemoryAttributesTable.c
index 408bcd3527ee..35156aea14dd 100644
--- a/MdeModulePkg/Core/Dxe/Misc/MemoryAttributesTable.c
+++ b/MdeModulePkg/Core/Dxe/Misc/MemoryAttributesTable.c
@@ -104,7 +104,7 @@ InstallMemoryAttributesTable (
 
   if ((mPropertiesTable.MemoryProtectionAttribute & EFI_PROPERTIES_RUNTIME_MEMORY_PROTECTION_NON_EXECUTABLE_PE_DATA) == 0) {
     DEBUG ((EFI_D_VERBOSE, "MemoryProtectionAttribute NON_EXECUTABLE_PE_DATA is not set, "));
-    DEBUG ((EFI_D_VERBOSE, "because Runtime Driver Section Alignment is not %dK.\n", EFI_ACPI_RUNTIME_PAGE_ALLOCATION_ALIGNMENT >> 10));
+    DEBUG ((EFI_D_VERBOSE, "because Runtime Driver Section Alignment is not %dK.\n", RUNTIME_PAGE_ALLOCATION_GRANULARITY >> 10));
     return ;
   }
 
diff --git a/MdeModulePkg/Core/Dxe/Misc/MemoryProtection.c b/MdeModulePkg/Core/Dxe/Misc/MemoryProtection.c
index 45f360cccf75..070228bc7265 100644
--- a/MdeModulePkg/Core/Dxe/Misc/MemoryProtection.c
+++ b/MdeModulePkg/Core/Dxe/Misc/MemoryProtection.c
@@ -344,12 +344,12 @@ IsMemoryProtectionSectionAligned (
   switch (MemoryType) {
   case EfiRuntimeServicesCode:
   case EfiACPIMemoryNVS:
-    PageAlignment = EFI_ACPI_RUNTIME_PAGE_ALLOCATION_ALIGNMENT;
+    PageAlignment = RUNTIME_PAGE_ALLOCATION_GRANULARITY;
     break;
   case EfiRuntimeServicesData:
   case EfiACPIReclaimMemory:
     ASSERT (FALSE);
-    PageAlignment = EFI_ACPI_RUNTIME_PAGE_ALLOCATION_ALIGNMENT;
+    PageAlignment = RUNTIME_PAGE_ALLOCATION_GRANULARITY;
     break;
   case EfiBootServicesCode:
   case EfiLoaderCode:
diff --git a/MdeModulePkg/Core/Dxe/Misc/PropertiesTable.c b/MdeModulePkg/Core/Dxe/Misc/PropertiesTable.c
index 5ea20dbf8972..e7c4a9571250 100644
--- a/MdeModulePkg/Core/Dxe/Misc/PropertiesTable.c
+++ b/MdeModulePkg/Core/Dxe/Misc/PropertiesTable.c
@@ -804,7 +804,7 @@ SetPropertiesTableSectionAlignment (
   IN UINT32  SectionAlignment
   )
 {
-  if (((SectionAlignment & (EFI_ACPI_RUNTIME_PAGE_ALLOCATION_ALIGNMENT - 1)) != 0) &&
+  if (((SectionAlignment & (RUNTIME_PAGE_ALLOCATION_GRANULARITY - 1)) != 0) &&
       ((mPropertiesTable.MemoryProtectionAttribute & EFI_PROPERTIES_RUNTIME_MEMORY_PROTECTION_NON_EXECUTABLE_PE_DATA) != 0)) {
     DEBUG ((EFI_D_VERBOSE, "SetPropertiesTableSectionAlignment - Clear\n"));
     mPropertiesTable.MemoryProtectionAttribute &= ~((UINT64)EFI_PROPERTIES_RUNTIME_MEMORY_PROTECTION_NON_EXECUTABLE_PE_DATA);
@@ -1136,9 +1136,9 @@ InsertImageRecord (
   }
 
   SetPropertiesTableSectionAlignment (SectionAlignment);
-  if ((SectionAlignment & (EFI_ACPI_RUNTIME_PAGE_ALLOCATION_ALIGNMENT - 1)) != 0) {
+  if ((SectionAlignment & (RUNTIME_PAGE_ALLOCATION_GRANULARITY - 1)) != 0) {
     DEBUG ((EFI_D_WARN, "!!!!!!!!  InsertImageRecord - Section Alignment(0x%x) is not %dK  !!!!!!!!\n",
-      SectionAlignment, EFI_ACPI_RUNTIME_PAGE_ALLOCATION_ALIGNMENT >> 10));
+      SectionAlignment, RUNTIME_PAGE_ALLOCATION_GRANULARITY >> 10));
     PdbPointer = PeCoffLoaderGetPdbPointer ((VOID*) (UINTN) ImageAddress);
     if (PdbPointer != NULL) {
       DEBUG ((EFI_D_WARN, "!!!!!!!!  Image - %a  !!!!!!!!\n", PdbPointer));
@@ -1338,7 +1338,7 @@ InstallPropertiesTable (
     DEBUG ((EFI_D_INFO, "MemoryProtectionAttribute - 0x%016lx\n", mPropertiesTable.MemoryProtectionAttribute));
     if ((mPropertiesTable.MemoryProtectionAttribute & EFI_PROPERTIES_RUNTIME_MEMORY_PROTECTION_NON_EXECUTABLE_PE_DATA) == 0) {
       DEBUG ((EFI_D_ERROR, "MemoryProtectionAttribute NON_EXECUTABLE_PE_DATA is not set, "));
-      DEBUG ((EFI_D_ERROR, "because Runtime Driver Section Alignment is not %dK.\n", EFI_ACPI_RUNTIME_PAGE_ALLOCATION_ALIGNMENT >> 10));
+      DEBUG ((EFI_D_ERROR, "because Runtime Driver Section Alignment is not %dK.\n", RUNTIME_PAGE_ALLOCATION_GRANULARITY >> 10));
       return ;
     }
 
