On 13 April 2018 at 04:05, Guo Heyi <heyi....@linaro.org> wrote:
> Hi Ard,
> Any comments?

Apologies for the delay. I have been travelling and am behind on email.

> Anyway we can modify the code if you insist on using an intermediate CPU IO
> address space.

I have not made up my mind yet, to be honest. I agree there is a
certain elegance to merging both translations, but I am concerned that
existing EDK2 code may deal poorly with I/O addresses that require
more than 32 bits to express.

Did you try the mm command in the shell for instance? As you know, I
recently removed an artificial address range limit there, but I wonder
if it uses 64-bit variables for I/O ports.
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