[fpga] Update slice to work with 32kB ROM

The 32kB ROM configuration uses 4-bit RAM cells which were previously
not supported by the slice scripts. This commit adds the following
changes:

* Update the Vivado rom.mmi generation script to support 4bit wide
  address ranges.
* Update the gen_vivado_mem_image.py to support swapping of byte
  nibbles. This is needed in order to match the expected bit order in
  the updatemem command.

Signed-off-by: Miguel Osorio <miguelosorio@google.com>
3 files changed
tree: 3be7ebd03381e1321f64b561a3adcf1feb19809c
  1. .github/
  2. ci/
  3. doc/
  4. hw/
  5. rules/
  6. site/
  7. sw/
  8. test/
  9. util/
  10. .bazelignore
  11. .bazelrc
  12. .bazelversion
  13. .clang-format
  14. .dockerignore
  15. .flake8
  16. .gitignore
  17. .style.yapf
  18. .svlint.toml
  19. .svls.toml
  20. _index.md
  21. apt-requirements.txt
  22. azure-pipelines.yml
  23. BUILD
  24. check_tool_requirements.core
  25. CLA
  26. COMMITTERS
  27. CONTRIBUTING.md
  28. LICENSE
  29. meson.build
  30. meson_init.sh
  31. meson_options.txt
  32. python-requirements.txt
  33. README.md
  34. tool_requirements.py
  35. toolchain.txt
  36. topgen-reg-only.core
  37. topgen.core
  38. WORKSPACE
  39. yum-requirements.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.

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.

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Have a look at CONTRIBUTING and our documentation on project organization and processes for guidelines on how to contribute code to this repository.

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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).