Stefan Reinauer (stefan.reinauer@coreboot.org) just uploaded a new patch set to gerrit, which you can find at http://review.coreboot.org/4213
-gerrit
commit c515ad3983e0bea7526f93333dc603563e6edd31 Author: Shawn Nematbakhsh shawnn@google.com Date: Wed May 8 11:41:04 2013 -0700
Add DDR refresh config to pei data structure.
Allow platform customized DDR config, including forcing refresh rate to 2x.
Change-Id: I311ae7ddf25142153c94a3fc3fb0a36e03f50ab2 Reviewed-on: https://gerrit.chromium.org/gerrit/50476 Reviewed-by: Duncan Laurie dlaurie@chromium.org Tested-by: Shawn Nematbakhsh shawnn@chromium.org Commit-Queue: Shawn Nematbakhsh shawnn@chromium.org --- src/northbridge/intel/sandybridge/pei_data.h | 8 ++++++++ 1 file changed, 8 insertions(+)
diff --git a/src/northbridge/intel/sandybridge/pei_data.h b/src/northbridge/intel/sandybridge/pei_data.h index d317515..5e0ff0f 100644 --- a/src/northbridge/intel/sandybridge/pei_data.h +++ b/src/northbridge/intel/sandybridge/pei_data.h @@ -121,6 +121,14 @@ struct pei_data * 2 2N */ int nmode; + /* DDR refresh rate config. JEDEC Standard No.21-C Annex K allows + * for DIMM SPD data to specify whether double-rate is required for + * extended operating temperature range. + * 0 Enable double rate based upon temperature thresholds + * 1 Normal rate + * 2 Always enable double rate + */ + int ddr_refresh_rate_config; } __attribute__((packed));
#endif