Question about IO-fpages

[Christian Stueble]

Am Fri, 15 Oct 1999 schrieben Sie:
> Christian Stueble <stueble at amaunet.cs.uni-dortmund.de> writes:
> 
> > > It is said that always the complete IO space should be specified as
> > > receive fpage, why?
> > ?
> 
> With flexpages you can map a page to an arbitrary address by
> specifying an according receive flex page.
> 
> You are not allowed to do this with an IO-area. If someone grants you
> the right to access port X you can't change this to port Y by
> specifying a receive window in you IO address space. Therefore you
> have to specify your whole IO address space so that IO ports are always
> mapped one to one.
I think Fiasco/L4 uses memory mapped I/O, not separated I/O?

Chris

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 Christian Stueble............stueble at ls6.cs.uni-dortmund.de
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