tree c9a56f1b7ca9e4426a9130d6c60c644193377ebc
parent 3650691b1365d22050b95afcf52ce634526b714e
author Pirmin Vogel <vogelpi@lowrisc.org> 1638804613 +0100
committer Pirmin Vogel <vogelpi@lowrisc.org> 1639052709 +0100

[aes] Switch to multi-rail main controller FSM

This commit switches the main controller FSM to a multi-rail
implementation to protect the design against control-path FI. Some
relevant control signals use multi-bit encodings and every rail
evaluates and drives one bit of these signals only. To prevent
synthesis optimizations and resource sharing between individual rails,
prim_buf cells are used as optimization barriers.

Signed-off-by: Pirmin Vogel <vogelpi@lowrisc.org>