| commit | 044b8e8cb9f2505d48870dbf697ba06cdfbd5e8d | [log] [tgz] |
|---|---|---|
| author | Martin Lueker-Boden <martin.lueker-boden@wdc.com> | Sat Jul 30 21:22:22 2022 -0700 |
| committer | Martin Lueker-Boden <47870387+martin-lueker@users.noreply.github.com> | Tue Aug 02 19:59:55 2022 -0700 |
| tree | 6d321c42c964e0f18344ee4081286b7e0edae0e9 | |
| parent | d2eca35d801fafaeca73ce355d5e2f50b5aef903 [diff] |
[entropy_src/rtl] Manage early SHA3 disablement
A handfull of FW_OV tests have been failing when the SHA3 conditioner
but the SHA block has for whatever reason encountered a delay
ingesting the last word of the "message". This highlights the
need to also check the FW_OV_WR_FIFO_FULL register before
disabling SHA3.
This commit:
- Updates the documentation for the FW_OV_SHA3_START register to
add a warning about this problem.
- Adds a new recoverable alert field ES_FW_OV_DISABLE_ALERT to
notify users when they violate this recommendation.
- Tidies up the ready signal for the sha3_msgfifo_ready signal so
that it is more predictable when this recommendation is violated.
This makes for better scoreboarding and easier testing of
ES_FW_OV_DISABLE_ALERT field.
- Data left in the prim_packer fifo is held there either until
the SHA3 is reenabled or until the IP is disabled.
Signed-off-by: Martin Lueker-Boden <martin.lueker-boden@wdc.com>
OpenTitan is an open source silicon Root of Trust (RoT) project. OpenTitan will make the silicon RoT design and implementation more transparent, trustworthy, and secure for enterprises, platform providers, and chip manufacturers. OpenTitan is administered by lowRISC CIC as a collaborative project to produce high quality, open IP for instantiation as a full-featured product. See the OpenTitan site and OpenTitan docs for more information about the project.
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