[prim] update clock_mux prim to avoid using BUFG

- if all prim clocking modules use BUFGs, it quickly overwhelms the
  FPGA's placement resources and causes a build error.
- this parameter allows to selectively bypass BUFG in FPGAs where
  needed.

Signed-off-by: Timothy Chen <timothytim@google.com>

[clkmgr] add option to remove clock gates for fpga

Signed-off-by: Timothy Chen <timothytim@google.com>

[clkmgr] fix typo

Signed-off-by: Timothy Chen <timothytim@google.com>

[prim] various updates to the bufg issue

- change parameter name to include 'Fpga' for clarity.
- add buffers back into clock dividers to ensure anchor points are not changed.
- remove unnecessary usage of bufg in rstmgr
- add buffers where needed in clkmgr

Signed-off-by: Timothy Chen <timothytim@google.com>

[clkmgr] fix buffer naming

Signed-off-by: Timothy Chen <timothytim@google.com>

[clkmgr] fix typo

Signed-off-by: Timothy Chen <timothytim@google.com>
7 files changed
tree: 6dd7ac93ee36a9e6c9bd7a154d96064c0122750e
  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
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).