Hi Henrik,
On Thu, 23 May 2013 10:53:39 +0200, Henrik Nordström henrik@henriknordstrom.net wrote:
ons 2013-05-22 klockan 11:26 -0400 skrev Tom Rini:
If we can implement it cleanly, this isn't (at the 1000 meter view) all that much different than what we do on some PowerPC platforms today where everything must fit within a few kilobytes.
Yes it is quite doable. The pieces I have done should be possible to fit without too much effort.
The question is more if these kinds of board initialization only programs is seen as suitable for having in the u-boot tree. It's not really an SPL as it does not load anything, but it's 99.9% the same code as used in u-boot SPL.
My opinion is that such code fits in U-Boot quite well. After all, SPL too was "that much shorter bit of code that was run before U-Boot because U-Boot is too large to load and run directly on this platform". Granted, SPL now tends to outgrow itself -- to the point that it becomes more of a 'lightweight U-Boot', as Falcon mode shows -- but obviously, there is a need for a very short code piece that can fit in e.g. a NAND access device's read buffer.
Regards Henrik
Amicalement,