| commit | bc40da4e70dbb0209f65f0fd4c6a239d9eeac9a3 | [log] [tgz] |
|---|---|---|
| author | Pirmin Vogel <vogelpi@lowrisc.org> | Thu Jan 14 15:42:07 2021 +0100 |
| committer | rasmus-madsen <53917183+rasmus-madsen@users.noreply.github.com> | Tue Jan 19 13:27:42 2021 +0100 |
| tree | 32558562c3bc030ef094b4175b277a9428ba26d8 | |
| parent | 11ff44965ade4e68cb393166be5396514c527418 [diff] |
[aes] Simplify clearing functionality This commit simplifies the clearing functionality by reducing the number of trigger bits from 4 to 2: - One bit for clearing key, IV, and input data registers, and - one bit for clearing output data registers. This way, software can already trigger the clearing of the key, IV, and input data registers while the last block operation is still running. After the operation is finished, the output registers can be read in parallel to the clearing operation. Having more, separate clearing triggers is not useful but makes design verification a lot harder as it adds many difficult corner cases. This resolves lowRISC/OpenTitan#4653. Signed-off-by: Pirmin Vogel <vogelpi@lowrisc.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.
This repository contains hardware, software and utilities written as part of the OpenTitan project. It is structured as monolithic repository, or “monorepo”, where all components live in one repository. It exists to enable collaboration across partners participating in the OpenTitan project.
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Unless otherwise noted, everything in this repository is covered by the Apache License, Version 2.0 (see LICENSE for full text).