Auxiliary translation lookaside buffer for assisting in accessin

Details Auxiliary translation lookaside buffer for assisting in accessin Auxiliary translation lookaside buffer for assisting in accessin

1996-06-25

1999-01-12

Swann, Tod R.

Electrical computers and digital processing systems: memory

Address formation

Address mapping

395823, G06F 1210

Patent

active

058601465

ABSTRACT:
A computer system includes a data processor, a primary translation lookaside buffer for storing page table entries and translating virtual addresses into physical addresses, local memory coupled to the data processor for storing data and computer programs at specified physical addresses, and remotely located memory coupled to the data processor by a computer network for storing data at specified remote physical addresses. The computer system further includes a remote translation lookaside buffer (RTLB) that stores a plurality of remote page table entries. Each remote page table entry represents a mapping between a range of physical addresses and a corresponding range of remote physical addresses. The primary translation lookaside buffer translates a virtual address asserted by the data processor into a physical address. When the physical address does not correspond to a location in the local memory, the RTLB determines whether the physical address matches at least one of the remote page table entries stored in the RTLB, and selects one of those remote page table entries when at least one match is found. The RTLB's selection circuitry selects a single remote page table entry in accordance with predefined RPTE selection criteria when two or more of the remote page table entries match the physical address. Then, a remote physical address is generated by combining a portion of the selected remote page table entry with a portion of the physical address.

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EPO Search Report, EP97304324, Oct. 15, 1997.

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