Maintaining validity of cached address mappings

Details Maintaining validity of cached address mappings Maintaining validity of cached address mappings

2011-05-17

2011-05-17

Thomas, Shane M (Department: 2186)

Electrical computers and digital processing systems: memory

Address formation

Address mapping

C711S006000, C711SE12068

Reexamination Certificate

active

07945761

ABSTRACT:
A method is provided for creating and maintaining the validity of a cache group including one or more cache elements. Each of the cache elements corresponds to a different address space in a virtual memory of a computer system. Each of the cache elements include one or more caches that store mappings from virtual addresses to data or values that are functions of or dependent upon physical addresses that correspond to the virtual addresses. When there is an address space switch from a first address space to a second address space, the cache group is searched to find the cache element corresponding to the second address space, and that found cache element is made the current cache element for virtual memory access through the cache element. Changes in the page tables are also detected and reflected in the caches of the cache group to maintain the caches up-to-date.

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