Re: [Qemu-devel] [PATCH 2/3] target-xtensa: xtfpga: attach FLASH to system IO

[Peter Crosthwaite <crosthwaitepeter@gmail.com>]

On Sun, Sep 27, 2015 at 11:01 AM, Max Filippov <jcmvbkbc@gmail.com> wrote:
> On Sun, Sep 27, 2015 at 8:42 PM, Peter Crosthwaite
> <crosthwaitepeter@gmail.com> wrote:
>> On Sun, Sep 27, 2015 at 10:16 AM, Max Filippov <jcmvbkbc@gmail.com> wrote:
>>> XTFPGA FLASH is tied to XTFPGA system IO block. It's not very important
>>> for systems with MMU where system IO block is visible at single
>>> location,
>>
>> Are your relying on a matching change in the guest for MMU setup here?
>>
>> Can you explain a little more how the MMU allows a physical address
>> remap of the underlying hardware as this looks like a non
>> backwards-compatible board design rev.
>
> No change is needed as this change doesn't affect memory map.
> It only detaches FLASH from the system memory and attaches it
> to the system IO region, at the same physical address as before.
>

Ok I get it now :). Commit message confused me a little with the MMU
stuff but reading it again it makes sense. Change looks good. I'll
wait for resolution on P1 before putting an RB.

Regards,
Peter

> --
> Thanks.
> -- Max