On Thu, 2008-12-18 at 22:01 +0300, Anton Vorontsov wrote: > On Thu, Dec 18, 2008 at 12:51:29PM -0600, Kumar Gala wrote:
> >> I saw somewhat similar behaviour on 83xx target, the cause was > >> that my .config file contained bogus UDBG_RTAS_CONSOLE=y symbol > >> (or was it PPC_EARLY_DEBUG_RTAS_PANEL=y? Or HVC_UDBG=y? I don't > >> quite remember). > >> > >> Obviously, on 83xx we don't have RTAS or HVC stuff, but kernel > >> didn't oops or hang completely, it was busy with executing various > >> delays in those drivers and then just continued to load. > > > > Why are these drivers even doing anything on 83xx? Seems like they need > > something to bind against or some detection of "HW". > > Early console/UDBG is known to cause problems if enabled on > inappropriate hardware. They start working very early, so it's hard > for them to do the hw detection (no device tree yet, I presume). Yes that's the whole point, it's _EARLY_ debug, there's even a big fat warning in the Kconfig. cheers -- Michael Ellerman OzLabs, IBM Australia Development Lab wwweb: http://michael.ellerman.id.au phone: +61 2 6212 1183 (tie line 70 21183) We do not inherit the earth from our ancestors, we borrow it from our children. - S.M.A.R.T Person
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