On 03/29/2012 04:11 AM, Mark Cave-Ayland wrote: >>> What about POWERPC_EXCP_40x? And are all the classic chips OK with the >>> 2.06B implementation? >> >> Hrm, yeah. I think what you ought to do is to use the new logic just >> for the "classic" exception models. Have the default branch remain >> the one that just masks ME. That's wrong, but it's the same wrong as >> we have already, and we can fix it later once we've verified what the >> right thing to do is for 40x and BookE. > > I'm actually coming at this from a fixing what was potentially an > OpenBIOS bug rather than a PPC angle, so I have to admit I have no I > idea which ones are the "classic" exception models. Would you consider > this to be just EXCP_STD, EXCP_6* and EXCP_7*?
Also POWERPC_EXCP_G2, and maybe POWERPC_EXCP_970? Even on server there's a question of whether it's a 2.06 chip or previous version of the architecture. One thing that sticks out for classic chips that is missing here is MSR[POW], which should be cleared on exceptions. -Scott
