Efficient and flexible memory copy operation
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United States of America Patent
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-
Mar 20, 2012
Grant Date -
Dec 11, 2008
app pub date -
Aug 14, 2008
filing date -
Dec 22, 2005
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A system, method, and computer program product for semi-synchronously copying data from a first portion of memory to a second portion of memory are disclosed. The method comprises receiving, in a processor, a call for a semi-synchronous memory copy operation. The semi-synchronous memory copy operation preserves temporal persistence of validity for a virtual source address corresponding to a source location in a memory and a virtual target address corresponding to a target location in the memory by setting a flag bit. The call includes at least the virtual source address, the virtual target address, and an indicator identifying a number of bytes to be copied. The memory copy operation is placed in a queue for execution by a memory controller. The queue is coupled to the memory controller. At least one subsequent instruction is continued to be executed as the subsequent instruction becomes available from an instruction pipeline.
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