Revert "tacoma: Remove CP0 reset"

This reverts commit 5ef58e42bd2c27605cd952bf590b2879759425d8.

There is a unknown issue with Tacoma hardware in which the CP0 reset
needs to happen within the power_control.exe. The theory is it is timing
related (i.e. the CP0 reset needs to occur extremely close to the power
being turned on). Given that Tacoma is a development system, time has not
been allotted to getting to the bottom of this.

It works fine on some systems, but fails catastrophically on others with
an assortment of power fault errors.

Due to this issue, we can not utilize the new kernel mechanism for
controlling CP0 on Tacomas.

Change-Id: I793ed0259426e6b42021fb92ca869fd2b6e15ace
1 file changed
tree: ee9f82606d05c5fefbd9f043009596c5814a2941
  1. conf/
  2. meta-fsp2/
  3. meta-palmetto/
  4. meta-romulus/
  5. recipes-core/
  6. recipes-kernel/
  7. recipes-phosphor/
  8. COPYING.apache-2.0
  9. COPYING.MIT
  10. LICENSE
  11. MAINTAINERS
  12. README.md
  13. recipes.txt
README.md

OpenEmbedded/Yocto/OpenBMC BSP layer for IBM systems

This layer provides support for the BMC firmware on IBM POWER systems server products.

This layer depends on:

URI: git://git.openembedded.org/openembedded-core
layers: meta
branch: master
revision: HEAD

URI: https://github.com/openbmc/meta-phosphor
branch: master
revision: HEAD

URI: https://github.com/openbmc/meta-openpower
branch: master
revision: HEAD

URI: https://github.com/openbmc/meta-aspeed
branch: master
revision: HEAD

The following systems are supported.

Witherspoon, or AC922, is an IBM POWER9 two-socket, 2U Accelerated Compute Server with up to 6 NVIDIA Tesla GPUs. More information can be found here.

In addition to witherspoon, this layer contains additional machine configurations such as swift. The default machine target is witherspoon, so in order to build a different configuration, or to build witherspoon after building a different one, set the MACHINE environment to the desired configuration name (see the conf/machine/ subdirectory for available options):

export MACHINE=machine_configuration_name

Then build:

bitbake obmc-phosphor-image

Example:

export MACHINE=swift
bitbake obmc-phosphor-image
bitbake phosphor-logging

export MACHINE=witherspoon
bitbake obmc-phosphor-image

Contributing

meta-ibm patches are reviewed using the Gerrit instance at https://gerrit.openbmc-project.xyz.

Please submit patches to Gerrit. More information on using Gerrit can be found here. https://github.com/openbmc/meta-ibm is a hosting mirror only and GitHub pull requests are not monitored and will not be accepted.

Patch checklist. Please ensure patches adhere to the following guidelines:

For questions or help please come join us on the mailing list or in IRC.