[U-Boot] [uboot PATCH v2] Add uboot "fdt_high" enviroment variable

Grant Likely grant.likely at secretlab.ca
Thu Jul 14 20:50:02 CEST 2011


On Thursday, July 14, 2011, David Long <dave.long at linaro.org> wrote:
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> On Thu, 2011-07-14 at 09:10 -0400, Jerry Van Baren wrote:
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> Hi Dave,
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> This looks reasonable, with one minor nit...
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> Need spaces around the "="
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> I will add the spaces before applying the patch unless you send an
> updated patch.
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> OK, thanks much.  Someone else recently pointed that out to me too.  I can generate another update if you wish, but I'll let you handle that unless you say otherwise.
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> FYI:  In case it wasn't clear, this all came about because: 1) the Pandaboard has 1GB of RAM;  2) the presence of an fdt causes u-boot to relocate the fdt and ramdisk to the end of ram by default;  3) and the Linux kernel does not like having to access memory beyond about 3/4G (HIGHMEM) during early boot.
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Regardless of this patch, the pandaboard uboot still needs to be
fixed. Setting an fdt_high variable is useful for debug, but it is not
a fix.

g.

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-- 
Grant Likely, B.Sc., P.Eng.
Secret Lab Technologies Ltd.


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