[U-Boot-Users] Cannot boot from a uImage on the lite5200

[Grant Likely]

On 4/20/05, Wolfgang Denk <wd at denx.de> wrote:
> In message <528646bc0504201254fade191 at mail.gmail.com> you wrote:
> >
> > What specifically needs to be done to configure a kernel for use with
> > u-boot?  From the documentation I could only find references to using
> > mkimage to prepare an image (which I've done).
> 
> You must use the raw  kernel  image,  without  the  kernel  bootstrap
> stuff.  And  you  must  make  sure  to  pass the parameters correctly
> (struct bd_info). See also the FAQ at
> http://www.denx.de/twiki/bin/view/DULG/LinuxHangsAfterUncompressingKernel

Do you mean the bootstrap stuff that's wrapped around a vmlinux.gz to
create a zImage, or do you mean arch/ppc/kernel/setup.c and others? 
I'm building the uImage directly from the vmlinux.gz, so I don't have
any of the zImage stuff.

> 
> > but it made no difference.  I could not find anything in the kernel
> > config file related to u-boot for this port.  The file
> 
> This is probably the problem.
> 
> > Documentation/powerpc/mpc52xx.txt in the kernel tree states that a
> > 'make uImage' should build an image bootable by u-boot.  (The Makefile
> > simply calls mkimage for the uImage target)
> 
> This is probably not enough. At least  you  must  make  sure  not  to
> include any bootstrap stuff.

I've got weird stuff happening here now.  With the same uImage I've
now seen three different behavious:
1. (most frequently) get initial setup banners ("id arch", et all). 
Crashes w/ board reset before kernel version banner
2. locks up before printing anything
3. kernel boots fine.

It's looking more like I've got a problem with the hardware
configuration on the Linux side now.  Time to step through init
code....

g.