[U-Boot] Help command broken on AT91SAM9G10-EK

[Justin Waters <justin.waters@timesys.com>]

Peter,

On Fri, 2009-11-13 at 17:10 -0500, Justin Waters wrote:
> Peter,
> 
> On Fri, 2009-11-13 at 16:39 -0500, Peter Tyser wrote:
> > My guess is that somehow the end of u-boot command section is getting
> > corrupted.  Perhaps the editenv patches, etc increase the size of your
> > image such there's an overlap in sections that isn't reported as an
> > error?  Or is the stack above the U-boot image in RAM?  Or malloc pool,
> > etc?
> > If you look at other commands near help (eg exit or test) in your
> > System.map file, do they have the same issues as as 'help'?  Seems fishy
> > that the u-boot command table is near the end of the u-boot image, and
> > you're seeing issues specifically with the end of the u-boot command
> > table.
> > 
> 
> Brilliant.  I removed a couple of commands (USB, in particular), and it
> seems to be working fine.  No garbled messages, no system halt.
> 
> I'll look into this some more on Monday.  It seems to only affect the
> 9261/9G10 family.  Everything works fine on the 9G20 and 9263.
> 
> Thank you for your help!  editenv is a really nice addition, by the way.
> 
> > Best,
> > Peter
> 
> Thanks,
> Justin

Got it.  The problem was with the first stage bootloader, which was
apparently only copying the first 0x33900 bytes of U-Boot into RAM.  The
image containing the editenv changes apparently broke this barrier,
causing the image size to jump up to 0x33A00 (thanks to page alignment).
After changing the value to something larger in AT91 Bootstrap (I picked
0x33C00 since it's a multiple of the page size of the flash), everything
works fine.

I didn't encounter the problem on the 9G20 because it's a smaller image
(no LCD driver), and the 9263 was loading from NAND flash instead of
dataflash.

Thanks again!

-Justin