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Apparatus and method for direct memory access in a hub-based memory system

  • US 7,222,197 B2
  • Filed: 02/24/2005
  • Issued: 05/22/2007
  • Est. Priority Date: 07/22/2003
  • Status: Expired due to Fees
First Claim
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1. A method for executing memory operations in a computer system having a processor, a system controller coupled to the processor, and a system memory having at least one memory module coupled to the system controller through a memory bus, the method comprising:

  • writing direct memory access (DMA) information to a location in the system memory representing instructions for executing memory operations in the system memory without processor intervention;

    obtaining control of the memory bus from the processor and system controller; and

    using a DMA controller located on the memory module, accessing the location in the system memory to which the DMA information is written and handling execution of the memory operations represented by the instructions by the DMA controller on the memory module until completion of the memory operations.

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