公开(公告)号：US20130219112A1

公开(公告)日：2013-08-22

申请号：US13850100

申请日：2013-03-25

申请人： Virident Systems Inc.

发明人： Kenneth A. Okin ,  Vijay Karamcheti

IPC分类号： G06F12/02

CPC分类号： G06F12/02 ,  G06F11/1658 ,  G06F11/20 ,  G06F12/0246 ,  G06F12/06 ,  G06F12/08 ,  G06F12/10 ,  G06F2212/1032 ,  G06F2212/205 ,  G06F2212/7201 ,  G06F2212/7202 ,  G11C16/3418 ,  G11C16/3427

摘要： A memory controller (MC) is associated with a remapping table to enable access to content in a memory system that includes asymmetric memory. The MC receives a request for a memory read or an Input/Output (I/O) write from a central processing unit (CPU) for a physical address specified by the system's memory management unit (MMU). The CPU uses the MMU to manage memory operations for the CPU, by translating the virtual addresses associated with CPU instructions into physical addresses representing system memory or I/O locations. The MC for asymmetric memories is configured to process the MMU-specified physical addresses as an additional type of virtual addresses, creating a layer of abstraction between the physical address specified by the MMU and the physical memory address with which that address is associated by the MC. The MC shields the CPU from the computational complexities required to implement a memory system with asymmetric components.