Re: [PATCH v3 0/4] mvebu: Add network support for Armada 370/XP

[Sebastian Hesselbarth <sebastian.hesselbarth@gmail.com>]

On 11/13/2014 10:09 AM, Uwe Kleine-König wrote:
> On Wed, Nov 12, 2014 at 12:22:22PM +0100, Sebastian Hesselbarth wrote:
>> On 11/12/2014 11:56 AM, Uwe Kleine-König wrote:
>>> Hello again,
>>>
>>> here come the recent insights.
>> [...]
>>>
>>> It seems to be not possible to easily dump the register space in both
>>> U-Boot and barebox for comparison. md 0xf1074000+0x4000 just hangs
>>> somewhere in the middle.
>>>
>>> A difference between U-Boot and barebox is the location where the
>>> internal registers are mapped. Maybe something that depends on U-Boot's
>>> memory layout leaks into barebox because I do 2nd stage booting?
>>>
>>> Out of ideas at the moment. :-(
>>
>> Uwe,
>>
>> Nice comparison, but did you double check caches are disabled? There is
>> no support for Dcache on mvebu SoCs in barebox atm.
> I would expect that U-Boot disables caches on go. But I remember there
> was a bug in that area some time ago.

Why should U-Boot do anything on go except jumping to that location?

> Now I saw a different behaviour:

Let's start from scratch and change one thing at a time:

Can you try to UART boot barebox directly and try both eth interfaces?

If that already does not work we have to look at barebox only.

Sebastian

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