System and method for performing page table walks on speculative software prefetch operations
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United States of America Patent
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-
Aug 10, 2004
Grant Date -
Jul 3, 2003
app pub date -
Jan 3, 2002
filing date -
Jan 3, 2002
priority date (Note) -
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status (Latency Note)
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Abstract
A method and system are employed within a processor for performing page table walks on speculative software prefetch operations. The system includes a first fault register to store information associated with a faulting micro-op relating to a non-prefetch memory access operation and a second fault register to store information associated with a faulting micro-op relating to a prefetch memory access operation. Also included in the system is a first unit to determine whether a currently pending micro-op relates to a non-prefetch operation or a prefetch operation. The first unit is configured to drop the currently pending micro-op from a pipeline if (1) the currently pending micro-op relates to a prefetch memory access and (2) the currently pending micro-op has previously faulted.
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