Implement BlGetVirtualAddress() and BlPhysicalListToVirtual() routines

xtldr/includes/xtldr.h

@@ -152,6 +152,11 @@ XTCDECL
 INT_PTR
 BlGetSecureBootStatus();
 
+XTCDECL
+PVOID
+BlGetVirtualAddress(IN PXTBL_PAGE_MAPPING PageMap,
+                    IN PVOID PhysicalAddress);
+
 XTCDECL
 EFI_STATUS
 BlGetVolumeDevicePath(IN PWCHAR SystemPath,
@@ -253,6 +258,13 @@ BlPhysicalAddressToVirtual(IN PVOID PhysicalAddress,
                            IN PVOID PhysicalBase,
                            IN PVOID VirtualBase);
 
+XTCDECL
+EFI_STATUS
+BlPhysicalListToVirtual(IN PXTBL_PAGE_MAPPING PageMap,
+                        IN OUT PLIST_ENTRY ListHead,
+                        IN PVOID PhysicalBase,
+                        IN PVOID VirtualBase);
+
 XTCDECL
 VOID
 BlQueryConsoleMode(OUT PUINT_PTR ResX,