| commit | dd46cf9fe24eac8076040a038b7fa77ab8545ea5 | [log] [tgz] |
|---|---|---|
| author | Eunchan Kim <eunchan@opentitan.org> | Mon Jul 12 12:42:31 2021 -0700 |
| committer | Eunchan Kim <eunchan@opentitan.org> | Wed Jul 14 10:53:24 2021 -0700 |
| tree | 62cafa5887a07ee732c3a51bf8bd2a3f1798eab7 | |
| parent | c36f247fc9e1a72eb9210b7d3b492c6d9ad9063e [diff] |
[kmac] Latch Entropy Mode when ready This commit allows the kmac_entropy module to latch the entropy mode when it is out from `StReset` state. This is related to the issue #6831 In previous design, the SW may change the entropy mode at any time if the module is not operating. But internal FSM did not expect the sudden change of the entropy_mode. It is decided to latch the entropy mode and not affected by the SW change after the SW setting entropy_ready. To change the mode, SW need to reset the IP. It is intentional to not allow FSM to move back to `StReset` as in `StReset` the entropy module generates garbage entropy to SHA3 core for ROM_CTRL to verify its image. Signed-off-by: Eunchan Kim <eunchan@opentitan.org>
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