[alert/dv] add semaphore to avoid alert and ping response collison

Alert_p/n can trigger in two conditions:
1). real alert issued by alert_sender_driver
2). alert issued by ping
Rare cases if 1) and 2) are called at the same time, then
`drive_alert_pings` task should be called twice with a min of 2 cycles
delay.

This PR uses a semaphore to make sure `drive_alert_pings` task was
triggered one at the time.

Signed-off-by: Cindy Chen <chencindy@google.com>
1 file changed
tree: 0347fd4d7cd4bd0c70b9e837dd5a29245fe8a644
  1. .github/
  2. ci/
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  4. hw/
  5. site/
  6. sw/
  7. test/
  8. util/
  9. .clang-format
  10. .dockerignore
  11. .flake8
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  13. .style.yapf
  14. _index.md
  15. apt-requirements.txt
  16. azure-pipelines.yml
  17. check_tool_requirements.core
  18. CLA
  19. COMMITTERS
  20. CONTRIBUTING.md
  21. LICENSE
  22. meson.build
  23. meson_init.sh
  24. meson_options.txt
  25. python-requirements.txt
  26. README.md
  27. tool_requirements.py
  28. toolchain.txt
README.md

OpenTitan

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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.

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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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