Re: Adding board support

[Thierry Reding <thierry.reding-RM9K5IK7kjKj5M59NBduVrNAH6kLmebB@public.gmane.org>]

[-- Attachment #1: Type: text/plain, Size: 2223 bytes --]

* Stephen Warren wrote:
> Thierry Reding wrote at Thursday, October 20, 2011 1:08 PM:
> > * Stephen Warren wrote:
> > > Thierry Reding wrote at Thursday, October 20, 2011 2:08 AM:
> > > ...
> > > > I've been working some on getting our boards to boot from a device tree.
> > > > Unfortunately, the U-Boot issue seems to be more of a problem than I
> > > > anticipated. Since the mainline U-Boot doesn't run properly,
> > >
> > > What issues are you having? I assume you're referring to something more
> > > than just getting stuff flashed with nvflash.
> > 
> > Flashing U-Boot is not the problem, but when booting the device, there's no
> > output whatsoever on the debug port. That's what I meant in one of the
> > previous mails. nvflash says it's loading fastboot.bin at address 0x00108000,
> > and quickboot seems to use the same load address. However, U-Boot is built
> > with CONFIG_SYS_TEXT_BASE set to 0x00E08000. If it is loaded to the same
> > address as fastboot/quickboot it obviously cannot run. So I went ahead and
> > built U-Boot (both mainline and the one from the Chromium repo) with a load
> > address of 0x00108000 - to no avail.
> 
> OK, I built U-Boot with load address 0x00108000 and also see nothing at boot.
> So, I've reproduced at least one of your problems.
> 
> (This is with an Android-style nvflash that configures the BCT to tell the CPU
> to load/boot the bootloader at address 0x00108000, so this should work.)
> 
> So, I've added this observation into the bug I filed. I'll let you know once
> we've had a chance to investigate and/or solve this.
> 
> Sorry this isn't working yet; it's pretty early days for U-Boot on Tegra
> outside of ChromeOS, which uses the modified nvflash and hence doesn't hit
> these issues.

I've been able to make limited progress on this. I've been able to
successfully run a mainline U-Boot (c30a15e) with the patches you mentioned
previously applied on top. However, this currently only works as quickboot
payload. Standalone is not working yet. However this allows booting a
mainline kernel with device tree support. So while the nvflash issues are
sorted out, I have something I can get work done with.

Thierry

[-- Attachment #2: Type: application/pgp-signature, Size: 198 bytes --]