Split protocol approaches for enabling devices with enhanced persistent memory region access

Abstract

A host command is received designating a first interface standard at a first port for exposing a storage element implemented by a non-volatile memory device and a second interface standard at a second port for exposing a persistent memory region (PMR) implemented as a power protected region of a volatile memory device. The non-volatile memory device and the volatile memory device are associated with a first switch for implementing the first interface standard and a second switch for implementing the second interface standard. The first interface standard supports one or more alternate protocols implemented by the second interface standard. The storage element is exposed by designating the first interface standard at the first port and the PMR by designating the second interface standard at the second port. A segment of the PMR is allocated as a cacheable memory marked as visible through, and shared through, the second interface standard.