[Libre-soc-bugs] [Bug 607] unnecessary code added related to MMU in PowerDecoder2

[bugzilla-daemon at libre-soc.org]

https://bugs.libre-soc.org/show_bug.cgi?id=607

--- Comment #8 from Luke Kenneth Casson Leighton <lkcl at lkcl.net> ---
ok there are a few things going on here.  the CSV File always directs to the
SPR FU.   i've added a filter which allows the CSV entry to get through to the
MMU FU.

then stopped non-MMU SPR requests from getting to the SPR FU and only allowed
them to get to the MMU FU.

then also i had to fix the MMU FSM to get it to store in the SPR regfile.

also, the unit test was wrong.  you can't give a FU things that it is incapable
of processing.  the MMU FSM cannot cope with SPRs numbered 720 for example.

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