[U-Boot] [PATCH v1 0/7] Enable high speed and heavy load for DDR4 for LSCH3

Joakim Tjernlund joakim.tjernlund at transmode.se
Thu Nov 5 09:03:53 CET 2015


On Wed, 2015-11-04 at 10:03 -0800, York Sun wrote:
> This patch set revises the DDR driver to support higher speed for DDR4
> under heavy load (two dual-rank DIMMs) for four-chipselect interleaving.
> Single quad-rank DIMM is not supported yet.

Hi York

Seeing these patches reminds me about something I have been mening to ask,
Is it possible init the ddr controller/ddr ram (using ECC also) but
still retain (parts of) memory contents?

I am looking at keeping data at the end of memory when performing a
warm start, but still init the controll/ddr ram (without D_INIT set).
This way one could pick up any changes to DDR timing if needed.
Before reboot, ddr ram is set to Self Refresh(SR).

 Jocke  


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