Re: [RFC] new bus architecture (+ byte-endianess)

Martin Mares (mj@ucw.cz)
Tue, 8 Jun 1999 00:32:13 +0200


Hello,

> > I see that it would be useful for ISA devices, but for PCI we can do this
> > easily without using ioremap_io() if we just translate the I/O addresses
> > read from the device before passing them to the driver. I'm not sure whether
> > this is worth the effort or not as I know of no PCI device where I/O
> > accesses would be time critical.
> Should not we do it symmetric with MMIO access?

Unfortunately, we have zillions of ISA card drivers which access I/O ports
in the old way and unless we can gain anything more than symmetry, is probably
isn't wise to convert all of them to ioremap_io().

Have a nice fortnight

-- 
Martin `MJ' Mares   <mj@ucw.cz>   http://atrey.karlin.mff.cuni.cz/~mj/
Faculty of Math and Physics, Charles University, Prague, Czech Rep., Earth
"Dijkstra probably hates me." -- /usr/src/linux/kernel/sched.c

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