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opensecura / 3p / lowrisc / opentitan / 9e14e830adf072f8c766278c855308e6a830f6fb
commit9e14e830adf072f8c766278c855308e6a830f6fb[log] [tgz]
authorMichael Munday <mike.munday@lowrisc.org>Fri Feb 18 15:01:37 2022 +0000
committerMichael Munday <mike.munday@lowrisc.org>Mon Feb 21 13:09:30 2022 +0000
tree38852a443189de3c5f4d9da0fda512e29f1af676
parentea2fd1b1585ba66cdac05374295a0ca31dbce837 [diff]
[ibex] Set ePMP reset values (ROM: LRX, MMIO: LRW, MMWP=1, RLB=1)

After reset ePMP will be configured as follows:

 | Entry | Address Space | Encoding | Permissions |
 |-------|---------------|----------|-------------|
 | 2     | ROM           | NAPOT    | LRX         |
 | 11    | MMIO          | TOR      | LRW         |

Machine mode whitelist policy (MMWP) and rule locking bypass (RLB)
will also be enabled.

This change also modifies the test ROM so that it sets up the ePMP
configuration such that read, write and execute accesses are
permitted anywhere in the address space to match the pre-existing
behavior.

Finally some ePMP configuration done by the mask ROM is redundant
and so has been removed. The mask ROM checks the ePMP configuration
is as expected and this code is not changed.

Fixes #7834.

Signed-off-by: Michael Munday <mike.munday@lowrisc.org>
4 files changed
tree: 38852a443189de3c5f4d9da0fda512e29f1af676
  1. .github/
  2. ci/
  3. doc/
  4. hw/
  5. rules/
  6. site/
  7. sw/
  8. test/
  9. third_party/
  10. util/
  11. .bazelignore
  12. .bazelrc
  13. .bazelversion
  14. .clang-format
  15. .dockerignore
  16. .flake8
  17. .gitignore
  18. .style.yapf
  19. .svlint.toml
  20. .svls.toml
  21. _index.md
  22. apt-requirements.txt
  23. azure-pipelines.yml
  24. BUILD
  25. check_tool_requirements.core
  26. CLA
  27. COMMITTERS
  28. CONTRIBUTING.md
  29. LICENSE
  30. meson-config.txt
  31. meson.build
  32. meson_init.sh
  33. meson_options.txt
  34. python-requirements.txt
  35. README.md
  36. tool_requirements.py
  37. toolchain.txt
  38. topgen-reg-only.core
  39. topgen.core
  40. WORKSPACE
  41. 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).