Data processing system with cache memory addressable by virtual

Details Data processing system with cache memory addressable by virtual Data processing system with cache memory addressable by virtual

1989-08-29

1993-01-12

Gossage, Glenn

Boots, shoes, and leggings

395425, 364DIG1, G06F 1210, G06F 1214

Patent

active

051796759

ABSTRACT:
A data processing unit accesses data in a cache using a virtual address. If the data is not in the cache, the virtual address is translated by a memory management unit (MMU) into a physical address for accessing a main memory. The MMU can also access the cache, using the physical address, to retrieve page table entries held in the cache. This avoids the need for a main memory access to retrieve the page table entries, and hence speeds up the address translation operation. The physically addressed entries in the cache are tagged with a reserved context number to distinguish them from the virtually addressed data.

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