Memory type range register with write-back cache strategy for NVDIMM memory locations

摘要

A computer system includes a dual in-line memory module (DIMM), such as a registered DIMM (RDIMM), and a non-volatile DIMM (NVDIMM). A central processing unit (CPU) of the computer system has internal cache memory locations for caching data for the DIMM and NVDIMM. A memory type range register (MTTR) of the CPU is set for write-back cache strategy for a range of memory locations in the DIMM and NVDIMM. The computer system includes a power supply that, in the event of a power failure, triggers a hardware non-maskable interrupt (NMI) and sustains power to the CPU to allow cached data to be saved to non-volatile memory locations in the NVDIMM before the computer system completely powers down.