On Sat, 11 Nov 2000, Ivan Kokshaysky wrote:
> On Fri, Nov 10, 2000 at 07:35:41PM +0100, Gerard Roudier wrote:
> > I only have spec 1.0 on paper. I should have checked 1.1. Anyway, it may
> > still exist bridges that have been designed prior to spec. 1.1.
>
> Yes, DEC 2105x bridges, for example.
>
> The only update listed in revision history is "Update to include
> target initial latency requirements", so this (base > limit) stuff
> must be in rev. 1.0 as well. Please check chapters 3.2.5.[6,8,9].
The revision history should be a lot pessimistic about the amount of
additions. Btw, rev. 1.0 April 5, 1994 is 63 pages, and rev 1.1 is about
147 pages, as you know.
> > > I/O is slightly different because it's optional for the bridge -
> > > but if it's implemented same rules apply.
> >
> > Will also check the spec. on this point. :)
>
> Also, according the spec, we need some paranoia checks ;-)
> 1. check if the bridge has an I/O window not implemented
Read-only, returning zero on read. Already present in spec. 1.0.
> 2. if the bridge has regular BARs, allocate them properly
> on the primary bus.
Limit < Base (new in 1.1, unless I missed the point. Btw, I actually
donnot want to read again P2P spec. 1.0 :-) )
Gérard.
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