| commit | 5a3c15e71088c8d33ffffa16241037c5fb3e49da | [log] [tgz] |
|---|---|---|
| author | Michael Schaffner <msf@opentitan.org> | Fri Jan 08 20:10:34 2021 -0800 |
| committer | Michael Schaffner <msf@google.com> | Wed Jan 20 19:12:27 2021 -0800 |
| tree | 949f213de0db84765891f01df9afdd4db1df54d6 | |
| parent | 26b242fc52cb54480a4b7c358ad8efd8c1046077 [diff] |
[lc_ctrl/otp_ctrl] Update mmap and state generation scripts This moves the OTP scrambling constant generation (for keys and digests) into the memory map generation script instead of using the topgen RndCnt mechanism. Likewise, the generation of the RAW unlock token is moved into the life cycle state generation script. These changes have a couple of advantages later on: - The scrambling keys are conveniently available in the OTP memory map configuration, which eases generation of the OTP preload image later on. - The RAW unlock token does not have to be "statically" hashed in RTL, but can be hashed in Python as a preprocessing step before dumping it into the template. - It will be easier to replace the token hashing algo with KMAC later on. Note that we do not expect to have multiple instances of the OTP or life cycle controllers in our top-level, hence moving away from the RndCnst mechanism (which uses instantiation paramters) is safe. Signed-off-by: Michael Schaffner <msf@opentitan.org>
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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