[U-Boot] u-boot master on a pandaboard won't boot

[U-Boot] u-boot master on a pandaboard won't boot

[Lalancette, Christopher]

Hello,
     I've recently been playing around with u-boot on a pandaboard Rev A1.  The rest of my environment is an MLO built from x-loader git hash c4289f1bee035dea41536c5ba5e1bc36c7d493c4, and booting an ubuntu 11.04 kernel 2.6.38-1208-omap4.  Up until tag v2011.06, u-boot works flawlessly (as far as I've tested) on this combination.  However, if I take any u-boot release after that, including v2011.09 and u-boot git head, u-boot hangs very early on:

Texas Instruments X-Loader 1.5.1 (Nov  2 2011 - 08:55:25)                       
Reading boot sector                                                             
Loading u-boot.bin from mmc                                                     

And the status LEDs blink rapidly.

I bisected the problem down to commit bcae72116257201d7288cb8c525a29aea4875b95; prior to that commit, I can successfully[1] boot u-boot on the pandaboard, but after that I cannot.

I'm going to poke at it a bit more, but does anyone have any ideas of what is going on here?

---
Chris Lalancette

[1] Well, I can at least get beyond "Loading u-boot.bin from mmc" and boot the kernel and userland.  For some reason with this setup I can't get ethernet to work, but one problem at a time.

[U-Boot] u-boot master on a pandaboard won't boot

[Tom Rini]

On Wed, Nov 2, 2011 at 6:03 AM, Lalancette, Christopher
<clalancette@irobot.com> wrote:
> Hello,
> ? ? I've recently been playing around with u-boot on a pandaboard Rev A1. ?The rest of my environment is an MLO built from x-loader git hash c4289f1bee035dea41536c5ba5e1bc36c7d493c4, and booting an ubuntu 11.04 kernel 2.6.38-1208-omap4. ?Up until tag v2011.06, u-boot works flawlessly (as far as I've tested) on this combination. ?However, if I take any u-boot release after that, including v2011.09 and u-boot git head, u-boot hangs very early on:
>
> Texas Instruments X-Loader 1.5.1 (Nov ?2 2011 - 08:55:25)
> Reading boot sector
> Loading u-boot.bin from mmc

If you use SPL instead (so the 'MLO' that U-Boot also builds) does
everything work again?

-- 
Tom

[U-Boot] u-boot master on a pandaboard won't boot

[Lalancette, Christopher]

> If you use SPL instead (so the 'MLO' that U-Boot also builds) does
> everything work again?

Oh, I didn't even notice that u-boot now builds an MLO.  Thanks for the heads up.

Unfortunately, that doesn't help; when I copy both the new MLO and the new u-boot.bin into place (again from git
head), I don't get any output from my serial console at all.  I presume that means it is hanging up somewhere in
the MLO.

---
Chris Lalancette

[U-Boot] u-boot master on a pandaboard won't boot

[John Rigby]

On Wed, Nov 2, 2011 at 3:12 PM, Lalancette, Christopher
<clalancette@irobot.com> wrote:
>> If you use SPL instead (so the 'MLO' that U-Boot also builds) does
>> everything work again?
>
> Oh, I didn't even notice that u-boot now builds an MLO. ?Thanks for the heads up.
>
> Unfortunately, that doesn't help; when I copy both the new MLO and the new u-boot.bin into place (again from git
> head), I don't get any output from my serial console at all. ?I presume that means it is hanging up somewhere in
> the MLO.
MLO loads u-boot.img by default not u-boot.bin.  That may be your problem.

--john

[U-Boot] u-boot master on a pandaboard won't boot

[Aneesh V]

Hi Christopher,

On Wednesday 02 November 2011 06:33 PM, Lalancette, Christopher wrote:
> Hello,
>       I've recently been playing around with u-boot on a pandaboard Rev A1.  The rest of my environment is an MLO built from x-loader git hash c4289f1bee035dea41536c5ba5e1bc36c7d493c4, and booting an ubuntu 11.04 kernel 2.6.38-1208-omap4.  Up until tag v2011.06, u-boot works flawlessly (as far as I've tested) on this combination.  However, if I take any u-boot release after that, including v2011.09 and u-boot git head, u-boot hangs very early on:
>
> Texas Instruments X-Loader 1.5.1 (Nov  2 2011 - 08:55:25)
> Reading boot sector
> Loading u-boot.bin from mmc
>
> And the status LEDs blink rapidly.
>
> I bisected the problem down to commit bcae72116257201d7288cb8c525a29aea4875b95; prior to that commit, I can successfully[1] boot u-boot on the pandaboard, but after that I cannot.

This commit changes the load address of u-boot and according to the new
relocation scheme u-boot should be loaded at where it is built for.
x-loader is assuming the load address of TI Internal u-boot. You have
two options:

1. Use SPL - when you build mainline u-boot you get an MLO as
by-product. Use it instead of x-loader.
2. Change the u-boot load address in x-loader to 0x80100000
(CFG_LOADADDR in include/configs/omap4430panda.h)

BTW, I am considering unifying the two load addresses.

br,
Aneesh

>
> I'm going to poke at it a bit more, but does anyone have any ideas of what is going on here?
>
> ---
> Chris Lalancette
>
> [1] Well, I can at least get beyond "Loading u-boot.bin from mmc" and boot the kernel and userland.  For some reason with this setup I can't get ethernet to work, but one problem at a time.