[U-Boot] [PATCH 2/2] microblaze: move ENV onto top of flash

[Stephan Linz <linz@li-pro.net>]

Am Montag, den 02.07.2012, 07:52 +0200 schrieb Michal Simek: 
> 2012/7/1 Stephan Linz <linz@li-pro.net>:
> > On Microblaze systems with BPI configuration from CFI flash
> > the first 1-10 MB will occupied by the FPGA configuration
> > data (BIN file). So we can not use this area for the U-Boot
> > environment.
> >
> > In most of all FPGA configuration cases the upper sector in
> > flash memory will be free for individuell usage.
> 
> is it based on any statistic? I don't think so.

Hi Michal,

yes, there isn't ... you are right ;)

> 
> >
> > Signed-off-by: Stephan Linz <linz@li-pro.net>
> > ---
> >  include/configs/microblaze-generic.h |    8 +++-----
> >  1 files changed, 3 insertions(+), 5 deletions(-)
> 
> nack for this.
> One configuration file can't cover all fpga cases.
> The reason why there is only one configuration file for microblaze is
> that fpga variability.
> If you want to use this option just create new board with your configuration
> and use it.

I can live with that, but the current configuration file defines a
memory hole of 256kB in the first 2 sectors in flash. For what? -- The
environment is placed in the 3rd sector. All other sectors are free for
anything.

I think it would be more plausible if the last sector on top will be
used for environment and all other sectors down to the first would be
free for anything, or not?


br,
Stephan

> Generic microblaze board should be as simple as possible.
> I am ok with adding new command/drivers and improving config but I don't want to
> support everything because it is not possible.
> 
> Thanks,
> Michal
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