linux-kernel - Re: [PATCH] [MMC] Fix base address configuration in wbsd

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Date:	Mon, 07 Aug 2006 01:19:59 +0200
From:	Pierre Ossman <drzeus-list@...eus.cx>
To:	Alan Cox <alan@...rguk.ukuu.org.uk>
CC:	Ben Dooks <ben@...ff.org>, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] [MMC] Fix base address configuration in wbsd

Alan Cox wrote:
> Ar Sul, 2006-08-06 am 23:52 +0200, ysgrifennodd Pierre Ossman:
>   
>> Sorry, my intention wasn't to assert that it was only to be used on x86
>> but that the 16-bit assumption was safe.
>>     
>
> Your ISA bus mappings on a non x86 processor are likely to be 32bit MMIO
> -> PIO windows in memory space. 
>
>   

Since we configure the device, the PIO address must not be subject to
translation. If it is, then we must know how the translation is done.

As this is a rather crappy chip which nobody in their right mind would
use, we'll cross that bridge when/if someone decides to use it in a
system that doesn't behave like x86.

Rgds
Pierre

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