Configurable memory management unit

Electrical computers and digital processing systems: memory – Address formation – Address mapping

Reexamination Certificate

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Details

C711S207000

Reexamination Certificate

active

06854046

ABSTRACT:
An MMU provides services at a cost more directly proportional to the needs of the system. According to one aspect, the MMU provides both address translation and sophisticated protection capabilities. Translation and protection are desirable when applications running on the processor are not completely debugged or trustable, for example. According to another aspect, a system for configuring the MMU design according to user specifications and system needs is provided. The MMU configurability aspects enable the system designer to configure MMUs having run-time programmability features that span the range from completely static to completely dynamic. In addition, the MMU can be configured to support variable page sizes, multiple protection and sharing rings, demand paging, and hardware TLB refill, for example.

REFERENCES:
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patent: 6374342 (2002-04-01), Sasahara
patent: 6418520 (2002-07-01), Hayakawa et al.
patent: 6732250 (2004-05-01), Durrant
patent: 6763327 (2004-07-01), Songer et al.
patent: 20030204830 (2003-10-01), Brawn et al.

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