Patent number 8635385 is assigned to
The following quote was obtained by the news editors from the background information supplied by the inventors: "The invention relates to page requests within computer systems and more particularly to those systems handling page requests from peripheral devices.
"As peripheral devices develop more capabilities, one such capability being incorporated into peripheral devices is a translation look aside buffer (TLB) that indicates to the peripheral whether a logical address that the peripheral device wants to access is available in system memory. Such a page request, previously provided by the memory controllers, can now be sent by peripheral devices having TLBs. There needs to be a way to handle such page requests in a flexible and fair manner."
In addition to the background information obtained for this patent, VerticalNews journalists also obtained the inventors' summary information for this patent: "In an embodiment, a method is provided that includes receiving a page request from a peripheral device requesting that a memory page be loaded into system memory. The page request information that corresponds to the received page request is written as a queue entry into a queue structure. The processor is notified that the page request is present in the queue. In an embodiment, the processor may be notified with an interrupt that is uniquely associated with existence of a new page request.
"In an embodiment, a computer system is provided that includes an integrated circuit having a first communication link interface to receive a page request from a peripheral device indicating a need for memory page services. Queue entry generation logic responds to receipt of the page request by generating a queue entry incorporating information from the page request, sends the queue entry over a second communication interface to write the queue entry into a page request queue in system memory and notifies the processor of the queue entry."
URL and more information on this patent, see: Hummel, Mark D.; Kegel, Andrew G.. Mechanism to Handle Peripheral Page Faults. U.S. Patent Number 8635385, filed
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