On Mon, Sep 23, 2013 at 02:01:53PM +0100, Maciej W. Rozycki wrote: > There is no reliable way to tell R4000/R4400 SC and MC variations apart, > however simple heuristic should give good results. Only the MC version > supports coherent caching so we can rely on such a mode having been set > for KSEG0 by the power-on firmware to reliably indicate an MC processor. > SC processors reportedly hang on coherent cached memory accesses and Linux > is linked to a cached load address so the firmware has to use the correct > caching mode to download the kernel image in a cached mode successfully. > > OTOH if the firmware chooses to use either the non-coherent cached or the > uncached mode for KSEG0 on an MC processor, then the SC variant will be > reported, just as we currently do, so no regression here. Queued for 3.13. Thanks, Ralf
