Data storage unit employing translation lookaside buffer pointer

Details Data storage unit employing translation lookaside buffer pointer Data storage unit employing translation lookaside buffer pointer

1983-08-30

1987-07-21

Williams, Jr., Archie E.

Boots, shoes, and leggings

G06F 1208, G06F 1210

Patent

active

046822810

ABSTRACT:
A data processing system includes virtual-addressed and real-addressed stores. Whenever an addressed location is not resident in the memory in which it is attempted to be accessed, the address is translated to the other address space. If a virtual address cannot access the desired location in the virtual memory the virtual address through a virtual-to-real translator is translated to a real address and the location is addressed in the real memory. Whenever a real address needs to access a virtual address in the virtual-addressed memory, the real address is converted through a real-to-virtual translator in order to locate corresponding locations in the virtual-addressed memory. Virtual-to-real translation is carried out by storing the real addresses corresponding to a virtual address in a translation lookaside buffer. Entry to the translation lookaside buffer is gained by using a TLB pointer in a tag array which points to the TLB address which contains the desired real address. By storing a TLB pointer in the tag array rather than storing the full address, many bits are saved in the tag array.

REFERENCES:
patent: 4197580 (1980-04-01), Chang et al.
patent: 4218743 (1980-08-01), Hoffman et al.
patent: 4264953 (1981-04-01), Douglas et al.
patent: 4386402 (1983-05-01), Toy
patent: 4395754 (1983-07-01), Feissel
patent: 4481573 (1984-11-01), Fukunaga et al.
patent: 4482952 (1984-11-01), Akagi
patent: 4495575 (1985-01-01), Eguchi et al.

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