1. A method comprising: determining a category for a memory operation, wherein the category includes at least one of an architectural category memory operation and a speculative category memory operation; and performing a TLB cache process, including handling speculative memory operation invalid page walk responses with unreal entry indicators, wherein the TLB cache process includes: performing a page fault process if the category is determined to be an architectural category memory operation; and performing an unreal TLB entry process if the category is determined to be a speculative category memory operation.