I had  a hanging Uboot problem with a Sam440ep board.Never figured the problem out but
It workedd for another two years after the problems began. Died for good last September with the hanging becoming  a daily issue.
Dont think that it was overheating. I thought that it could have been a problem with  the on board  ethernet.

anyway I am still not giving up hopes of DRI and future kernals working, only into my second year of trying so too soon to give up .
Doing a git bisect on the 4.00-rc1 now.

On 02/24/2015, you wrote:

On Fri, 2015-02-20 at 15:25 -0400, Julian Margetson wrote:

quoted

On 2/18/2015 11:25 PM, Julian Margetson wrote:

quoted

 re PPC4XX PCI(E) MSI support.
https://lists.ozlabs.org/pipermail/linuxppc-dev/2010-November/087273.html

Hmm, I think all those comments were addressed before it was merged.

I tried to get a 4xx board going here last week, but it doesn't seem happy. I
can get a bit of uboot but then it hangs, might be overheating.

cheers