[libre-riscv-dev] daily kan-ban update 28jun2020

[Luke Kenneth Casson Leighton]

yesterday: attempting to get test_ldst_compunit.py functional showed issue
in wishbone pi2lsui

today: replacing Pi2LSUI with one that derives from a new base class
PortInterfaceBase.

the FSM for PortInterface is quite involved, and duplicating it multiple
times seems unwise.

the interaction between PortInterface and LoadStoreUnitInterface is however
proving irkesome.

l.



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