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Re: [Xen-devel] [PATCH] xen: Make serial console work

To: Christoph Egger <Christoph.Egger@xxxxxxx>, "xen-devel@xxxxxxxxxxxxxxxxxxx" <xen-devel@xxxxxxxxxxxxxxxxxxx>
Subject: Re: [Xen-devel] [PATCH] xen: Make serial console work
From: Keir Fraser <keir.fraser@xxxxxxxxxxxxx>
Date: Fri, 4 Jun 2010 14:46:54 +0100
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On 04/06/2010 14:40, "Keir Fraser" <keir.fraser@xxxxxxxxxxxxx> wrote:

> On 04/06/2010 14:23, "Christoph Egger" <Christoph.Egger@xxxxxxx> wrote:
> 
>> 
>> Hi!
>> 
>> Attached patch makes serial console work in simulators which
>> don't emulate an ns16550a but an ns16450.
> 
> I didn't think MCR and MSR registers had different behaviour between 16450
> and 16550? Is the emulator simply dodgy?

Yeah, I see that Linux's 8250 code has the same test. I think the emulator
is what needs fixing.

 -- Keir

>  -- Keir
> 
>> Signed-off-by: Christoph Egger <Christoph.Egger@xxxxxxx>
> 
> 
> 
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