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opensecura / 3p / lowrisc / opentitan / 9387752fbcc083a9a1778058689d8e4b04464268
commit9387752fbcc083a9a1778058689d8e4b04464268[log] [tgz]
authorPhilipp Wagner <phw@lowrisc.org>Fri Jul 16 10:49:25 2021 +0100
committerPhilipp Wagner <mail@philipp-wagner.com>Sun Jul 18 09:59:01 2021 +0100
treec88b410143785a6fb36eec763f393cf48060f12b
parent29b7c571d4e2ee1631c001dceff5bd0e18657ad1 [diff]
[otbn] Change URND and RND_PREFETCH CSR indices

The CSR indexes in OTBN are meant to be following the address map
specified in the RISC-V Privileged Specification, which gives ranges for
custom read-only, and read-writable CSRs (in M mode). The recent
addition of RND_PREFIX didn't follow these rules. This commit assigns
new addresses to URND (a read-only CSR) and RND_PREFETCH (a read-write
CSR):

Read/write CSRs:
  RND_PREFETCH is now at 0x7D8 (before: 0xFC1)

Read-only CSRs:
  RND          is now at 0xFC0 (unchanged)
  URND         is now at 0xFC1 (before: 0xFC2)

RTL, DV and ISS have been updated. No software has been using these CSRs
yet.

Signed-off-by: Philipp Wagner <phw@lowrisc.org>
5 files changed
tree: c88b410143785a6fb36eec763f393cf48060f12b
  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 and our documentation on project organization and processes 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).