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Feature/flush ctrl in csrwrite #99

Merged
merged 2 commits into from
Mar 3, 2023
Merged

Feature/flush ctrl in csrwrite #99

merged 2 commits into from
Mar 3, 2023

Commits on Mar 2, 2023

  1. [rtl] Flush controller in PMP CSR write ops 

    As Greg pointed out:

When we have an instruction in ID/EX that writes a PMP register that
update gets written to the CSR the same cycle the next instruction
moves from IF to ID/EX with it's PMP check done with the old value.

The solution is to flush the pipeline when we get a PMP CSR write.

Signed-off-by: Canberk Topal <ctopal@lowrisc.org>
    @ctopal @szbieg
    ctopal authored and szbieg committed Mar 2, 2023
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  2. [rtl] Flush pipe on MSECCFG CSR write 

    Without this an instruction executed immediately after the MSECCFG write
doesn't have the new MSECCFG setup applied to its execute permission.
    @GregAC @szbieg
    GregAC authored and szbieg committed Mar 2, 2023
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