Re: [PATCH RFC 1/2] m68k: io_mm.h: conditionalize ISA address translation on Atari

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On Fri, Jun 04, 2021 at 07:30:00PM +1200, Michael Schmitz wrote:
I'm still unsure whether changing the default branch for the sake of
fixing Atari behaviour is a sane idea - I was hoping for comments either
way.


You mean, what happens if a random m68k platform (other than amiga, atari
and q40) were to adopt CONFIG_ISA? I guess it would be nice if that would
'just work' but it's probably never going to be needed.

The NULL default was meant to catch incorrect use of config options related
to CONFIG_ISA. My repurposing the default branch for Atari's needs (no
translation for IDE) defeats that. But the chance that we run into such
incorrect use in the future are pretty slim indeed.

Well, we could in theory add a trex socket driver to get PCMCIA support
for the PowerBook 190 hardware. There was a driver for that in ppc for
the PowerBook 5300 which uses the same chipset. I believe the PCMCIA
drivers use these same macros in spite of not being considered ISA.
I don't see anything in drivers/pcmcia that is obviously an m68k
system even though I'm pretty sure I remember discussions of supporting
such hardware in the past.

Is PCMCIA support something we should also consider in all of this?

	Brad Boyer
	flar@xxxxxxxxxxxxx




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