A design structure embodied in a machine readable storage medium for at least one of designing, manufacturing, and testing a design is provided. The design structure includes a page table walker. The page table walker is moved from its conventional location in the memory management unit associated with the data processor to a location in main memory i.e. the main memory controller. As a result, wherein the processing of requests for data could selectively avoid or bypass cumbersome caches associated with the data processor.