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Re: Memory mapping of PCI device memory - PC platform
- To: nickg at cygnus dot co dot uk (Nick Garnett)
- Subject: Re: [ECOS] Memory mapping of PCI device memory - PC platform
- From: andrew dot lunn at ascom dot ch (Andrew Lunn)
- Date: Fri, 18 Aug 2000 12:49:08 +0200 (MET DST)
- Cc: ecos-discuss at sourceware dot cygnus dot com
> > So there is nothing special to do with eCos when we map memory from a PCI
> > device, right ?
> >
>
> Not as far as I am aware.
When we do this for the ebsa285 you have to ensure the MMU is set up
correctly so that it does not cache or use a write buffer when access
the PCI memory. There is probably some equivelent setting required in
the MMU for the i386. Something to check anyway.
Andrew