[Buildroot] [PATCH 1/4] mkpimage: new host package

[Jan Viktorin <viktorin@rehivetech.com>]

On Mon, 19 Oct 2015 23:36:23 +0200
Maxime Hadjinlian <maxime.hadjinlian@gmail.com> wrote:

> > By the way, there is still the fundamental question. Is the mkpimage
> > really necessary? I can boot the Altera SoC Development Kit without
> > running it. What is the value of doing that? Does it support the secure
> > boot sequence? Does it depend on some DIP switch on the board?
> >  
> As far I can remember you can't boot the SoCFPGA without the SPL being
> "signed" (which is really a simple header with a CRC and some padding so it
> fits a precise size).
> I'm curious how you made one boot without this as per Altera's
> documentation the Boot ROM needs it. Note that in Qsys, it's already done
> in their various scripts, so if you build U-Boot that way, it's done for
> you.
> There's no real added value as far as I could tell, the SoC needs it,
> that's all. And there's no DIP switch which helps you configure that on the
> dev kit. I don't think you can configure it. You have to do it and that's
> pretty much it.

That's strange. I tried it twice today. I am using files generated
directly by Buildroot. No other customizations. It builds the SPL image
of size ~43K. The size of the image with CRC is ~64K. Probably, I am
doing something in a wrong way(?). By the way, this was the reason why
I tried to update the readme.txt. I've created the SD card contents
from scratch to avoid any previous working version there... I'll
recheck it (hopefully) tomorrow with a different SD card.

Jan

-- 
  Jan Viktorin                E-mail: Viktorin at RehiveTech.com
  System Architect            Web:    www.RehiveTech.com
  RehiveTech
  Brno, Czech Republic