Integration Help about riscv-formal

[cliffordwolf]

The causality check assumes that in the check step (step 35+1 in the default checks.cfg configuration for rocket) the core retires an instruction that writes to a nonzero register. The "Warmup failed" message means that no such trace exists, i.e. it is impossible for the core to retire such an instruction at this time.

Usually in such cases the problem isn't the nonzero destination register but that the core simply isn't capable to retire any instructions in that cycle, for example because it is still busy with its reset sequence. Impossible to tell anything beyond that without the information necessary to reproduce the issue.

[CLappin]

Thank Clifford, I'll keep working on it and get back to you. I think it has to do with the set up of my rocket core vs your example rocket core.

[CLappin]

I'll close this for now 👍