SDK7786 zImage difficulities

SDK7786 zImage difficulities

[Andrew Murray]

Hello,

I've been unable to successfully use a zImage when using the defconfig
for the SDK7786 (head ...2fe3fe Apr 7).

When loading the zImage though a debugger to 0x60000000 and executing
from 0x60000000 (after allowing the ETS firmware to run to prompt) the
decompressor head relocates itself and jumps to 0x80800058 - however I
thought this was somewhere in the PCI space. This then results in a
general instruction exception which seems to be handled by the ETS:

**** Unhandled interrupt! - Exception registers: ****
TRAPA : 0x0
EXPEVT: 0x180
INTEVT: 0x420

Has anyone successfully used a zImage on this board - or could it be
broken in some way? I'm nearing my depth here so will be more than happy
for assistance.

Thanks,

Andrew Murray

Re: SDK7786 zImage difficulities

[Paul Mundt]

On Thu, Apr 08, 2010 at 02:40:48PM +0100, Andrew Murray wrote:
> I've been unable to successfully use a zImage when using the defconfig
> for the SDK7786 (head ...2fe3fe Apr 7).
> 
> When loading the zImage though a debugger to 0x60000000 and executing
> from 0x60000000 (after allowing the ETS firmware to run to prompt) the
> decompressor head relocates itself and jumps to 0x80800058 - however I
> thought this was somewhere in the PCI space. This then results in a
> general instruction exception which seems to be handled by the ETS:
> 
> **** Unhandled interrupt! - Exception registers: ****
> TRAPA : 0x0
> EXPEVT: 0x180
> INTEVT: 0x420
> 
> Has anyone successfully used a zImage on this board - or could it be
> broken in some way? I'm nearing my depth here so will be more than happy
> for assistance.

The ETS firmware will only work with vmlinux.bin's at the moment, not
zImages. vmlinux.bin is the default target for SDK7786, so simply not
specifying a build target will result in the proper image being
generated.