Subject: Re: needs MI wdc changes to support macppc's wdc
To: Wolfgang Solfrank <>
From: Ignatios Souvatzis <>
List: tech-kern
Date: 11/04/1998 20:42:14
On Wed, Nov 04, 1998 at 06:09:19PM +0100, Wolfgang Solfrank wrote:
> Hi,
> > Now, let's say you have the newer 7000 model ... On this system the
> > serial port registers are linear (no gap), but the IDE registers are
> > spaced mod 16.  On this system, it's an issue of how the individual
> > chips are wired up, i.e. the stride is per-device.
> > 
> > In the first example, it's appropriate to use stride in the bus space
> > tag.  In the second example, it's appropriate to add register map
> > support in the driver.
> Hmm, that's at least arguable.  To me it looks like the second example is
> an example of bad engineering, and that box should pay the price for it,
> not anyone using the same driver.

Uhm, no...

I'd just say, that in the 2nd example, we have (instances of) two different
busses on (attached to) the mainboard.