Copy-back cache system having a plurality of context tags and se

Details Copy-back cache system having a plurality of context tags and se Copy-back cache system having a plurality of context tags and se

1989-05-16

1992-09-08

Lee, Thomas C.

Boots, shoes, and leggings

364243, 3642434, 36424341, 364253, 3642548, 364DIG1, 395800, G06F 1208, G06F 1300, G06F 1212

Patent

active

051466031

ABSTRACT:
A data memory system includes a main memory and a copy-back cache. Each line of the cache has a context tag, which is compared with a current context number to test whether the line contains the required data. The cache can be flushed simply by resetting all the context tags to a null value, which ensures that the data cannot be accessed. However, it remains physically in the cache, and will eventually be copied back to the main memory when it is about to be overwritten with different data or when the physical address is next used.

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Goodman, "Coherency For Multiprocessor Virtual Address Caches", ASPLOS II, Oct. 5-8, 1987, pp. 72-81.

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