On Sat, Apr 24, 2004 at 10:23:34AM +0200, Maciej W. Rozycki wrote: > > Actually the R10000 way to do something like this is to use the uncached > > attribute like in the Origin. It allows using the same physical address > > space several times for different purposes. So on node 0 of an Origin > > indeed memory starts at physical address zero and there is no hole for > > the firmware. IP27 is afaik the only system using this R10000 feature > > which surprises me a little due to the otherwise great similarity of these > > two systems. > > That precludes the firmware from being run cached, though. Not very > nice, especially for callbacks, but perhaps a bit easier to deal with. Sane firmware copies itself to RAM at the earliest possible stage anyway - ROMs are way too slow. Ralf
