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Gabriel Paubert writes:
Gabriel> BATS are a good idea, but variable page size are another, superior IMHO,
Gabriel> possibility. It seems to be what Power4 has from what David said a few
Gabriel> days ago. I don't know how they mix variable page size with hash tables
Gabriel> and failed to find any detailed documentation...
The variable page sizes are determined on a segment by segment
basis. The segment type determines how to interpret the page table --
whether it maps 4KB or 16MB.
David
** Sent via the linuxppc-dev mail list. See http://lists.linuxppc.org/
David Edelsohn wrote:
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Gabriel Paubert writes:
Gabriel> BATS are a good idea, but variable page size are another, superior IMHO,
Gabriel> possibility. It seems to be what Power4 has from what David said a few
Gabriel> days ago. I don't know how they mix variable page size with hash tables
Gabriel> and failed to find any detailed documentation...
The variable page sizes are determined on a segment by segment
basis. The segment type determines how to interpret the page table --
whether it maps 4KB or 16MB.
The 405 processors have page sizes of
1k
4k
16k
64k
256k
1m
4m
16m
The 440 processors are the same except
4m removed
256m added
The page size is determined by a field in the TLB entry.
-Frank
--
Frank Rowand [off-list ref]
MontaVista Software, Inc
** Sent via the linuxppc-dev mail list. See http://lists.linuxppc.org/