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Implement turning on and off PC hardening. #395

Merged
merged 2 commits into from Jan 23, 2023
Merged

Implement turning on and off PC hardening. #395

merged 2 commits into from Jan 23, 2023

Commits on Jan 23, 2023

  1. Implemented turning pc_hardening on and off by using cpuctrl.pc_harde… 

    …ning.

Includes the following bugfixes:
- For a pipeline flush due to CSR writes, the controller could kill the pipeline for debug or interrupts before the flush was completed.
- The id_ex_pipe.pc_next was wrong for dummy branches (should have been +0 instead of +4)

Signed-off-by: Oystein Knauserud <Oystein.Knauserud@silabs.com>
    @silabs-oysteink
    silabs-oysteink committed Jan 23, 2023
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  2. Resetting default values for all flops within pc_check when pc harden… 

    …ing is not enabled.

Refactored interrupt_allowed slightly for clarity.

Signed-off-by: Oystein Knauserud <Oystein.Knauserud@silabs.com>
    @silabs-oysteink
    silabs-oysteink committed Jan 23, 2023
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