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| author | Tsung Yeung <tyeung@us.ibm.com> | 2019-03-19 09:21:53 -0400 |
|---|---|---|
| committer | Christian R. Geddes <crgeddes@us.ibm.com> | 2019-04-05 11:00:01 -0500 |
| commit | 40bcbd0f3a78e74a6c23c050f7cef854cc2c283a (patch) | |
| tree | 166cfea87d64fb2f4121cd6ccaa1c2ff269d86d6 /env.bash | |
| parent | b047a25de8a66b6795f026bfb1fdb6caae0ba594 (diff) | |
| download | talos-hostboot-40bcbd0f3a78e74a6c23c050f7cef854cc2c283a.tar.gz talos-hostboot-40bcbd0f3a78e74a6c23c050f7cef854cc2c283a.zip | |
Enable median rank wr_vref value on NVDIMM
- The NVDIMM restore procedure is required to restore the wr vref values.
The current method is to latch in the per-dram wr vref value with PDA.
However, this requires multiple CCS sequences due to hardware limitation
and would break refresh timing between sequences, introduce possible UEs.
To get around this, we will use the median value of all the drams per
rank-pair instead of per-dram value.
Previous attempt was to use average value but after the speaking with
Stephen G. median value is a better approach due to the possibility
that bad vref value from failing dram
- Added NVDIMM-specifc CCS execute procedure
Change-Id: Ie7d1e063c423a4374ca22422395ee5524d70a124
CQ:SW459457
Reviewed-on: http://rchgit01.rchland.ibm.com/gerrit1/74753
Tested-by: FSP CI Jenkins <fsp-CI-jenkins+hostboot@us.ibm.com>
Reviewed-by: Louis Stermole <stermole@us.ibm.com>
Reviewed-by: STEPHEN GLANCY <sglancy@us.ibm.com>
Tested-by: Jenkins Server <pfd-jenkins+hostboot@us.ibm.com>
Tested-by: Hostboot CI <hostboot-ci+hostboot@us.ibm.com>
Tested-by: HWSV CI <hwsv-ci+hostboot@us.ibm.com>
Reviewed-by: Jennifer A. Stofer <stofer@us.ibm.com>
Reviewed-on: http://rchgit01.rchland.ibm.com/gerrit1/74790
Tested-by: Jenkins OP Build CI <op-jenkins+hostboot@us.ibm.com>
Tested-by: Jenkins OP HW <op-hw-jenkins+hostboot@us.ibm.com>
Reviewed-by: Christian R. Geddes <crgeddes@us.ibm.com>
Diffstat (limited to 'env.bash')
0 files changed, 0 insertions, 0 deletions
