Trying a Promise Ultra/66 on powerpc

Geert Uytterhoeven Geert.Uytterhoeven at
Tue Aug 10 22:56:12 EST 1999

On Tue, 10 Aug 1999, Paul Mackerras wrote:
> Michel Lanners <mlan at> wrote:
> > I'd vote for making I/O ports a memory addresss like any other, and
> > making sure drivers get this address right. See my other post for
> > details..
> The problem is, there are PCI device drivers which assume you can get
> an address in I/O space from a PCI device (either directly from the
> config-space base address registers or from the pci_dev struct) and
> then just do inb and outb on that port address.  That's why inb/outb
> add _IO_BASE to the port number.
> One way might be to adjust the base addresses in all the pci_dev
> structs and then make sure all drivers use the address from the
> pci_dev struct rather than reading config space themselves.

Which will make our /proc/ioports look funny.



Geert Uytterhoeven                     Geert.Uytterhoeven at
Wavelets, Linux/{m68k~Amiga,PPC~CHRP}
Department of Computer Science -- Katholieke Universiteit Leuven -- Belgium

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