Re: RFC: Devices, buses and hotplug
H. Peter Anvin (hpa@transmeta.com)
7 Jun 1999 06:58:01 GMT
Followup to: <Pine.LNX.4.10.9906062105420.32429-100000@waste.org>
By author: Oliver Xymoron <oxymoron@waste.org>
In newsgroup: linux.dev.kernel
>
> On Sun, 6 Jun 1999, David S. Miller wrote:
>
> > I never got down to facts about whether it was an issue of the PPC
> > supporting it in HW or the PPC developers just mis-designed their
> > framework and now require big endian friendly devices just to work.
>
> I can find no sign of anything like the UltraSparc scheme you described in
> the 604 manuals[1] I have. The only support for endian issues I can find
> is two bits in the MSR, one for current endianness, and one for endianness
> of the fault handler. Funny how Intel's apparently genuine attempt to be
> inclusive by not specifying an endianness for PCI has resulted in a mess.
>
Well, PCI configuration space is most definitely littleendian; I don't
know how "official" that is, but this looks to me more like a
specification defect than anything else...
-hpa
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