OK. I really didn't expect the PAS to use all these aliases.
> > In any case, I would only register one address and not all the aliases.
>
> Why? It seems to me that the only way to avoid conflict of devices is to
> register *all* the harmonics. Perhaps the holder of /proc/ioports
> information (whatever it is...) should define a 0x400+ harmonic method of
> allocation, so that you don't have to individually register each harmonic,
> and so that the output of /proc/ioports is less than 50 pages.
Well, you are right. If the aliasese/harmonics are used, they should be
registered. I originally thought they were only registered to prevent
conflicts with 10bits ISA cards. This would have been useless.
> Does anyone know if the PCI-ISA bridge blocks addresses with something other
> than zero in the high word from reaching the ISA devices? (I assume PCI I/O
> ports are 32-bits)
PCI I/O is 32 bits (or even 64 on some architectures) and I think all
addresses are forwarded to PCI bus, but the ones with the high word == 0
also to ISA. Maybe there are optimizations to prevent the low addresses to
be seen (and block?) the PCI bus ... I don't know.
Regards,
-- Kurt Garloff <K.Garloff@ping.de> (Dortmund, FRG) PGP key on http://student.physik.uni-dortmund.de/homepages/garloffThere is something frustrating about the quality and speed of Linux development. I.e. the quality is too high and the speed is too high, in other words, I can implement this XXXX feature, but I bet someone else has already done it and is just about to release his patch to Linus soon... [From a posting of Tigran Aivazian to linux-kernel, XXXX = disk stat]
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