School of Computer Science & Engineering
University of New South Wales
Advanced Operating Systems
COMP9242 2002/S2

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Fully Virtual Caches

Fastest (don't rely on TLB for retrieving data)
- however, needs TLB for protection
- or other mechanism to provide protection
Suffer from synonyms and homonyms
- requires flushing on context switch
  - makes context switches expensive
  - may even be required on kernel $\rightarrow$ user switch
- ... or guarantee of no synonyms and homonyms
Require TLB lookup for write-back!
Used on MC68040, i860

Gernot Heiser 2002-08-15