Control mechanism for zero-origin data spaces

Details Control mechanism for zero-origin data spaces Control mechanism for zero-origin data spaces

1988-02-10

1991-04-16

Shaw, Gareth D.

Boots, shoes, and leggings

3642543, 3642557, 3642563, 3642564, 3642466, G06F 1200

Patent

active

050088114

ABSTRACT:
Within a data processing system, a control mechanism for supporting a data space without common segments in addition to traditional address spaces containing common segments. Logic for eliminating duplication of lookaside table entries for virtual addresses within shared segments, but not for identical virtual addresses within data address spaces is provided, as well as for overriding low address protection for store operations into data spaces. Thus, the entire virtual addressing range is available to programs wishing to use such data spaces for data isolation and data sharing.

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