[U-Boot] [PATCH] wandboard: add pxe support, set default boot command like highbank

[Stephen Warren]

On 08/06/2013 05:37 AM, Wolfgang Denk wrote:
> Dear Rob Herring,
> 
> In message <CAL_JsqJTg4CVfk0o9hLd4ZVksj+DNEsKLjcv6T7-6F-=BR+J+Q at mail.gmail.com> you wrote:
>>
>>> Why would you ever want to compile this into U-Boot at all?  Then any
>>> changes you need to make mean compiling and installing a new U-Boot,
>>> which is something you normally don't want to do.
>>
>> You may want to have factory default and "user" settings. Building in
>> the factory settings would be one way to accomplish that.
> 
> No. Handling these independently, outside of the compiled U-Boot image
> is as easy, and much more flexible.
> 
>>> U-Boot is perfectly able to import such settings from text files (or
>>> text blobs stored somewhere, even attached to the U-Boot image, if you
>>> want), so just use the text files separately, instead of hard
>>> compiling them into the code.
>>
>> In my case, I don't want to compile the environment into u-boot. But
>> some people do as I copied my scripts from Tegra which has them
>> built-in.

We have the *default* environment built-in, which is used when no valid
environment is found in flash. If there's an environment in flash, it
gets used rather than the built-in default.