[U-Boot] [PATCH 1/3] Revert "i.MX28: Enable additional DRAM address bits"

[Detlev Zundel <dzu@denx.de>]

Hi Marek,

[...]

>> - Why was the change made in the first place and for what OOT port?
>
> Change of a DRAM configuration register that enabled additional
> address bit, at address 512MB of DRAM. Though this caused memory hole
> on our M28 module with 256MB of DRAM, which _is_ mainline. X board is
> OOT and never will be mainlined I guess.

I still do not understand this fully.  What exactly is this "memory
hole" and why is it fatal?  As far as I can remember, there are always
some holes in the adress map, so why is this special?

Apart from that, I think most of these answers should go into the commit
message to understand what is happening.

Thanks in advance
  Detlev

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