Re: APUS bus access

[Geert U. <ge...@li...>]

On Wed, 9 Aug 2000 fh...@at... wrote:
> In <Pine.LNX.4.10.10008091645550.416-100000@cassiopeia.home>, on 08/09/00 
>    at 04:56 PM, Geert Uytterhoeven <ge...@li...> said:
> 
> >On Wed, 9 Aug 2000 hei...@at... wrote:
> 
> >Ideally, readl() and friends are meant for _PCI_ memory space only, and
> >PCI is per definition little endian.
> 
> Hmmm.  So those functions are meant for folks that use PowerMacs? I was
> thinking today that those functions had to be OK because APUS drivers must
> use them.  Perhaps this is not the case?

They are used for PPC boxes with PCI. Hence the CyberversionPPC could use them
as well.

> >to sym53c8xx_defs.h (or use le32 if the wiring on the board turns out to
> >be different), for clarity.
> 
> I really don't want to open my Amiga to see how the '770 chip is wired to
> the PPC.   I'm not sure if I could tell by just looking at it anyway.   It
> is  most likely possible to find out with a logic probe, since I think the
>  endianess is set by wiring some pins with the correct logic values.  At
> least I thought I read that somewhere.

I did not mean you have to open it :-) It would indeed still be hard to find
out...

Gr{oetje,eeting}s,

						Geert

--
Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- ge...@li...

In personal conversations with technical people, I call myself a hacker. But
when I'm talking to journalists I just say "programmer" or something like that.
							    -- Linus Torvalds