Boot method declaration

[Martin Stein]

Hi Norman,

I'm ok with that. I've already discussed this with Stefan. He'd
introduced the SPEC-way in base-hw and said that he simply copied it
from another case (in base-nova i think). Why this spec is needed wasn't
that interesting for me, i think he said that the imx53 uBoot behaves a
little strange (images must get extra-processed to work on it) and thus
requires distinction. I only wanted to know wich way should be targeted
as final solution.

Cheers,
Martin

On 12/17/2012 03:35 PM, Norman Feske wrote:
> Hi Martin,
> 
>> By now when doing a build there are two ways of defining the boot
>> method. In 'base-mb' one writes 'RUN_OPT="--target jtag" make demo' or
>> 'RUN_OPT="--target qemu" make demo' while qemu is set by default. At
>> least in base-hw with imx53 one must enrich the SPECS e.g. in
>> etc/specs.mk by the 'uboot' spec to get an appropriate Uboot image.
>>
>> Are there pros or cons for one of these methods, because i would prefer
>> to use only one them.
> 
> admittedly, I am not familiar with the rationale behind the 'uboot' spec
> value. As far as I know, it hasn't entered genodelabs/master yet. Maybe
> Stefan can clarify?
> 
> Because the selection of the boot method is outside of the scope of the
> build system but in the scope of the run tool, I regard the 'RUN_OPT'
> variable as the most natural way to steer the boot method.
> 
> I'd like to keep the purposes of both tools (build system and run tool
> respectively) well separated. By adding spec values for the boot method
> just to be picked up by the run tool but not the build system, we would
> blur the boundaries between those tools.
> 
> Cheers
> Norman
>