diff --git a/sdk/xtdk/bltypes.h b/sdk/xtdk/bltypes.h
index e667d28..7611706 100644
--- a/sdk/xtdk/bltypes.h
+++ b/sdk/xtdk/bltypes.h
@@ -76,6 +76,7 @@ typedef EFI_STATUS (*PBL_FRAMEBUFFER_GET_DISPLAY_INFORMATION)(OUT PXTBL_FRAMEBUF
 typedef EFI_STATUS (*PBL_FRAMEBUFFER_INITIALIZE)();
 typedef EFI_STATUS (*PBL_FREE_PAGES)(IN UINT64 Size, IN EFI_PHYSICAL_ADDRESS Memory);
 typedef EFI_STATUS (*PBL_FREE_POOL)(IN PVOID Memory);
+typedef VOID (*PBL_GET_MAPPINGS_COUNT)(IN PXTBL_PAGE_MAPPING PageMap, OUT PULONG NumberOfMappings);
 typedef EFI_STATUS (*PBL_GET_MEMORY_MAP)(OUT PEFI_MEMORY_MAP MemoryMap);
 typedef PLIST_ENTRY (*PBL_GET_MODULES_LIST)();
 typedef INT_PTR (*PBL_GET_SECURE_BOOT_STATUS)();
@@ -308,6 +309,7 @@ typedef struct _XTBL_LOADER_PROTOCOL
         PBL_COPY_MEMORY CopyMemory;
         PBL_FREE_PAGES FreePages;
         PBL_FREE_POOL FreePool;
+        PBL_GET_MAPPINGS_COUNT GetMappingsCount;
         PBL_GET_MEMORY_MAP GetMemoryMap;
         PBL_INITIALIZE_PAGE_MAP InitializePageMap;
         PBL_MAP_EFI_MEMORY MapEfiMemory;
diff --git a/xtldr/includes/xtldr.h b/xtldr/includes/xtldr.h
index 5e3315a..93c4b98 100644
--- a/xtldr/includes/xtldr.h
+++ b/xtldr/includes/xtldr.h
@@ -135,6 +135,11 @@ EFI_STATUS
 BlGetEfiPath(IN PWCHAR SystemPath,
              OUT PWCHAR *EfiPath);
 
+XTCDECL
+VOID
+BlGetMappingsCount(IN PXTBL_PAGE_MAPPING PageMap,
+                   OUT PULONG NumberOfMappings);
+
 XTCDECL
 EFI_STATUS
 BlGetMemoryMap(OUT PEFI_MEMORY_MAP MemoryMap);
diff --git a/xtldr/memory.c b/xtldr/memory.c
index dc90a9c..8d62773 100644
--- a/xtldr/memory.c
+++ b/xtldr/memory.c
@@ -91,6 +91,28 @@ BlFreeMemoryPool(IN PVOID Memory)
     return EfiSystemTable->BootServices->FreePool(Memory);
 }
 
+/**
+ * Returns the number of mappings in the page mapping structure.
+ *
+ * @param PageMap
+ *        Supplies a pointer to the page mapping structure.
+ *
+ * @param NumberOfMappings
+ *        Supplies a pointer to memory area where the number of mappings is returned.
+ *
+ * @return This routine does not return any value.
+ *
+ * @since XT 1.0
+ */
+XTCDECL
+VOID
+BlGetMappingsCount(IN PXTBL_PAGE_MAPPING PageMap,
+                   OUT PULONG NumberOfMappings)
+{
+    /* Return number of mappings */
+    *NumberOfMappings = PageMap->MapSize;
+}
+
 /**
  * Returns the memory descriptors which define a memory map of all the physical memory ranges reserved by the UEFI.
  *
diff --git a/xtldr/protocol.c b/xtldr/protocol.c
index 02610fd..425675d 100644
--- a/xtldr/protocol.c
+++ b/xtldr/protocol.c
@@ -630,6 +630,7 @@ BlpInstallXtLoaderProtocol()
     BlpLdrProtocol.Memory.CopyMemory = RtlCopyMemory;
     BlpLdrProtocol.Memory.FreePages = BlFreeMemoryPages;
     BlpLdrProtocol.Memory.FreePool = BlFreeMemoryPool;
+    BlpLdrProtocol.Memory.GetMappingsCount = BlGetMappingsCount;
     BlpLdrProtocol.Memory.GetMemoryMap = BlGetMemoryMap;
     BlpLdrProtocol.Memory.InitializePageMap = BlInitializePageMap;
     BlpLdrProtocol.Memory.MapEfiMemory = BlMapEfiMemory;