Linux-kernel mailing list archive 1999-23,: Re: [RFC] new bus architecture (+ byte-endianess)

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

David S. Miller (davem@redhat.com)
Mon, 7 Jun 1999 09:43:25 -0700

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Date: Mon, 7 Jun 1999 18:03:06 +0200
From: Jakub Jelinek <jj@sunsite.ms.mff.cuni.cz>

I don't know if SBUS<->SBUS DMA actually works, there are some bits
for it but have never tried, but PCI<->other PCI should definitely
work.

SBUS<-->SBUS on the same segment works, I've tried it.

One thing which probably does not work is PCI<-->PCI on the same PCI
controller yet different PBM segments, at least sun PCI docs describe
it this way. It seems the PCI controller cannot handle if it sends
out a transaction to the system bus which is addressed back to itself.

Later,
David S. Miller
davem@redhat.com

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