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Re: dump USB regs - command abort - illegal memory access


On Mon, Aug 04, 2008 at 09:24:57AM +0200, Karl Hiramoto wrote:
>
>
> Hi,
> I have the IXP435 Dev platform  and am trying to read the USB registers.  
> Can someone tell me why I get an Error trying to read specific addresses?
>
> On page 380, and 215 of the Dev Manual it says the USB0 base address is  
> 0xCD000000   and USB1 is 0xCE000000
>
> http://download.intel.com/design/network/manuals/316843.pdf
>
>
>
> RedBoot> dump -b 0xCD000000
> CD000000: ** command abort - illegal memory access?
> RedBoot> dump -b 0xCE000000
> CE000000: ** command abort - illegal memory access?

The IXP435 is not part of the eCos repository, so it is hard to say.

I would first check the MMU setup. Maybe the memory page containing
the USB device is not setup.

    Andrew

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