[CSE]  Advanced Operating Systems 
 COMP9242 2002/S2 
UNSW

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History
- 2000
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- Gernot Heiser (LiC)

 
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Next: Revoke Mappings: fpage_unmap System Up: 01-l4 Previous: Formal Fpage Mapping Rules

Fpage Notes

  • Page fault IPC (manufactured by kernel) specifies
    whole address space for receiver (\(b'=0, s'=64\))
  • Present MIPS implementation only uses smallest hardware page size (\(s=12\)), but that is transparent to user
    • Changed in next release.
  • Present MIPS implementation does not support granting
    • Changed in next release.
  • An attempt to map over an existing mapping is silently ignored
    (except if the mappings only differ in the write permission).
    This is a bug in all present L4 implementations!
    • Changed in next release.



Gernot Heiser 2002-08-07