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gerrit.openbmc.org / openbmc / openpower-libhei / 7c79605d66ec861c966df880e743801adb0f4945
commit7c79605d66ec861c966df880e743801adb0f4945[log] [tgz]
authorBen Tyner <ben.tyner@ibm.com>Mon Feb 03 19:00:37 2020 -0600
committerBen Tyner <ben.tyner@ibm.com>Wed Feb 12 10:09:34 2020 -0600
tree14865b6669b78db12c202dfe6333236dcd34c0e2
parent32c7600e4f4ab805d9bd2dfadc8a69abf474220a [diff]
Setup dependencies for subproject building

We need to define dependency information so that other projects
can build libhei as a subproject.

Signed-off-by: Ben Tyner <ben.tyner@ibm.com>
Change-Id: I9b49b7a72a87132d209c9df2a63344b7bade6f1b
5 files changed
tree: 14865b6669b78db12c202dfe6333236dcd34c0e2
  1. src/
  2. test/
  3. .clang-format
  4. .gitignore
  5. LICENSE
  6. MAINTAINERS
  7. meson.build
  8. meson_options.txt
  9. README.md
README.md

openpower-libhei: Hardware Error Isolation for POWER Systems

This library is a common, portable code base for isolating errors reported by hardware registers on POWER Systems chips.

The primary consumers (and requirements drivers) will be:

Core API

See the primary API definitions for details on how to use this library.

Integration

This library is intended to be integrated into containing user applications as a set of source files (either imported, or as a git subtree/submodule).

Details TBD.

User Application Requirements and APIs

  • The method to access hardware register data will vary per user application. Therefore, this library will declare the hardware access user APIs, but each containing user application must implement the APIs for their own environment.
  • This library will not contain data regarding hardware specific information. Instead, that information will be provided by the user application in the form of the Chip Data Files.
  • Tracing, or logging, methods will vary per user application. Specifically, FSP and Hostboot firmware utilize specialized macros as a mechanism to save code image space. Therefore, the user application will need to provide a specific header file that defines these macros. Details are in the common includes header.
  • Methods to assert programming bugs will vary per user application. Therefore, much like tracing, the user application will need to provide a specific header file that defines macros for assertion. Details are included in the common includes header.

Environment configuration

  • __HEI_READ_ONLY: When defined, it will ensure any hardware write support is disabled. Note that the Chip Data Files will contain rules for clearing and masking register bits. Both of which will require modifying hardware registers, which is not allowed by user applications like OpenBMC or FSP firmware.

Development Notes

  • The Hostboot and FSP environments only support up to C++11. Therefore, this library cannot use anything newer at this time.
  • Hostboot has a very limited environment. It does not include libc or libstdc++. However, Hostboot has implemented select functions from those libraries as needed. For details, you can reference src/include/ in the POWER Systems Hostboot firmware.