Flatflash system for byte granularity accessibility of memory in a unified memory-storage hierarchy

A system for providing byte granularity accessibility of memory in a unified memory-storage hierarchy in a computing environment, comprising:

• one or more computers with executable instructions that when executed cause the system to:
• map a location of one or more secondary memory medium pages in a secondary memory medium into an address space of a primary memory medium to extend a memory-storage hierarchy of the secondary memory medium;
• selectively promote one or more secondary memory medium pages from the secondary memory medium to the primary memory medium, wherein the primary memory medium functions as a cache to provide byte level accessibility to the one or more secondary memory medium pages;
• and
• redirect one or more memory requests for the one or more secondary memory medium pages using a promotion look-aside buffer (“PLB”) in a host bridge associated with the primary memory medium and the secondary memory medium.

A computer program product for providing byte granularity accessibility of memory in a unified memory-storage hierarchy in a computing environment by a processor, the computer program product comprising a non-transitory computer-readable storage medium having computer-readable program code portions stored therein, the computer-readable program code portions comprising:

• an executable portion that maps a location of one or more secondary memory medium pages in a secondary memory medium into an address space of a primary memory medium to extend a memory-storage hierarchy of the secondary memory medium;
• an executable portion that selectively promotes one or more secondary memory medium pages from the secondary memory medium to the primary memory medium, wherein the primary memory medium functions as a cache to provide byte level accessibility to the one or more secondary memory medium pages;
• and
• an executable portion that redirects one or more memory requests for the one or more secondary memory medium pages using a promotion look-aside buffer (“PLB”) in a host bridge associated with the primary memory medium and the secondary memory medium.