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Re: [patch][commit] Base address for hw-glue-probe-bus
- From: "Frank Ch. Eigler" <fche at redhat dot com>
- To: Dave Brolley <brolley at redhat dot com>
- Cc: sid at sources dot redhat dot com
- Date: Tue, 29 Aug 2006 14:06:45 -0400
- Subject: Re: [patch][commit] Base address for hw-glue-probe-bus
- References: <44F47F8D.6040108@redhat.com>
Hi -
> The address which is driven on the "address" pin of hw-glue-probe-bus is
> the one which comes in on the "upstream" bus. This is OK if the probe
> bus is at the top of the memory heirarchy, but not so useful if it is,
> for example, between a mapper and a memory component. [...]
This sacrifices reusability of such a probe component in a
multiply-connected bus topology (having multiple incoming mappings on
the same upstream bus). To do this without would require more
"wiring", like putting the bus-probe between the transparent mapper
and a similarly configured normal one.
- FChE