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

From: Max Filippov
Subject: Re: [Qemu-devel] [PATCH 2/3] target-xtensa: xtfpga: attach FLASH to system IO
Date: Sun, 27 Sep 2015 21:01:10 +0300

On Sun, Sep 27, 2015 at 8:42 PM, Peter Crosthwaite
<address@hidden> wrote:
> On Sun, Sep 27, 2015 at 10:16 AM, Max Filippov <address@hidden> 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.

-- Max

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