Google Git
Sign in
opensecura / 3p / lowrisc / opentitan / 46339bb01f4dea5dcc3ec0b0be5384c61cc3ade3
commit46339bb01f4dea5dcc3ec0b0be5384c61cc3ade3[log] [tgz]
authorPirmin Vogel <vogelpi@lowrisc.org>Wed Mar 17 09:36:02 2021 +0100
committerPirmin Vogel <vogelpi@lowrisc.org>Thu Mar 18 10:14:55 2021 +0100
treedfcdffeeaf2ba81d1b2c2fed6eee51364824d181
parent76e35160386278edee3b4bcc5b5a20656a1f6722 [diff]
[aes] Doc clearing sequence upon reset and align STATUS reg reset value

Upon reset, the AES module first performs a PRNG reseed and then clears
key, IV and data registers with pseudo-random data. Only after that, the
module becomes ready for software initialization.

This commit explicitly documents this behavior and changes the reset value
of the IDLE and INPUT_READY fields in the STATUS register. Both should be
low (not idle, not ready to receive inputs) when coming out of reset.
At the end of the clearing sequence, both bits will be high.

This is related to lowRISC/OpenTitan#5646.

Signed-off-by: Pirmin Vogel <vogelpi@lowrisc.org>
3 files changed
tree: dfcdffeeaf2ba81d1b2c2fed6eee51364824d181
  1. .github/
  2. ci/
  3. doc/
  4. hw/
  5. site/
  6. sw/
  7. test/
  8. util/
  9. .clang-format
  10. .dockerignore
  11. .flake8
  12. .gitignore
  13. .style.yapf
  14. .svlint.toml
  15. .svls.toml
  16. _index.md
  17. apt-requirements.txt
  18. azure-pipelines.yml
  19. check_tool_requirements.core
  20. CLA
  21. COMMITTERS
  22. CONTRIBUTING.md
  23. LICENSE
  24. meson.build
  25. meson_init.sh
  26. meson_options.txt
  27. python-requirements.txt
  28. README.md
  29. tool_requirements.py
  30. toolchain.txt
  31. topgen-generator.core
  32. topgen-reg-only.core
  33. topgen.core
  34. yum-requirements.txt
README.md

OpenTitan

OpenTitan logo

About the project

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.

About this repository

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.

Documentation

The project contains comprehensive documentation of all IPs and tools. You can access it online at docs.opentitan.org.

How to contribute

Have a look at CONTRIBUTING for guidelines on how to contribute code to this repository.

Licensing

Unless otherwise noted, everything in this repository is covered by the Apache License, Version 2.0 (see LICENSE for full text).