Approach for allocating virtual bank managers within a dynamic random access memory (DRAM) controller to physical banks within a DRAM

摘要

Banks within a dynamic random access memory (DRAM) are managed with virtual bank managers. A DRAM controller receives a new memory access request to DRAM including a plurality of banks. If the request accesses a location in DRAM where no virtual bank manager includes parameters for the corresponding DRAM page, then a virtual bank manager is allocated to the physical bank associated with the DRAM page. The bank manager is initialized to include parameters needed by the DRAM controller to access the DRAM page. The memory access request is then processed using the parameters associated with the virtual bank manager. One advantage of the disclosed technique is that the banks of a DRAM module are controlled with fewer bank managers than in previous DRAM controller designs. As a result, less surface area on the DRAM controller circuit is dedicated to bank managers.