-extern Uint32 MM_AllocPhys();
-extern void MM_RefPhys(Uint32 Addr);
-extern void MM_DerefPhys(Uint32 Addr);
+extern tPAddr MM_AllocPhys();
+extern tPAddr MM_AllocPhysRange(int Pages, int MaxBits);
+extern void MM_RefPhys(tPAddr PAddr);
+extern void MM_DerefPhys(tPAddr PAddr);
+extern int MM_GetRefCount(tPAddr Addr);