loadstore: Convert to 3-stage pipeline

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This makes loadstore use a 3-stage pipeline.  For now, only one
instruction goes through the pipe at a time.  Completion and writeback
are still combinatorial off the valid signal back from the dcache, so
performance should be the same as before.  In future it should be able
to sustain one load or store per cycle provided they hit in the
dcache.

Signed-off-by: Paul Mackerras <paulus@ozlabs.org>

pull/269/head

Paul Mackerras 5 years ago

parent f636bb7c39

commit f583d088b7

1 changed files with 588 additions and 434 deletions

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