Combined Memory Including a Logical Partition in a Storage Memory Accessed Through an IO Controller

摘要

A computer system having a combined memory. A first logical partition of the combined memory is a main memory region in a storage memory. A second logical partition of the combined memory is a direct memory region in a main memory. A memory controller comprising a storage controller is configured to receive a memory access request including a real address from a processor, determine whether the real address is for the first logical partition or for the second logical partition. If the address is for the first logical partition the storage controller communicates with an IO controller in the storage memory to service the memory access request. If the address is for the direct memory region, the memory controller services the memory access request in a conventional manner.