On Wed, Sep 05, 2007 at 01:05:25PM +0200, Arne Georg Gleditsch wrote: > "H. Peter Anvin" <[EMAIL PROTECTED]> writes: > > You're missing the point. How will the PCI bus transactions be > > different when using MMCONFIG versus your extended CF8 version? > > Conceivably this is useful if the IO hub does not support MMCONFIG > accesses. The AMD 8111 does not, as far as I can see. At least I > have an Opteron system where MMCONFIG is not supported, and I assume > it's because the 8111 doesn't provide it. I don't know if this is > going to be a realistic scenario for Barcelona systems. > > -- > Arne.
Not sure how many AMD 8111 based systems are out there which are upgradeable to Barcelona. I guess the BIOS won't setup MCFG for systems with 8111/8131 because both lack ECS MMIO Base Address Register. (Because 8111 and 8131 are not Mode2-PCI-X and PCI-express capable.) So if such a board is upgradeable, the way to access extended config space of the northbridge functions is to use CF8/CFC ECS access. Regards, Andreas -- Operating | AMD Saxony Limited Liability Company & Co. KG, System | Wilschdorfer Landstr. 101, 01109 Dresden, Germany Research | Register Court Dresden: HRA 4896, General Partner authorized Center | to represent: AMD Saxony LLC (Wilmington, Delaware, US) (OSRC) | General Manager of AMD Saxony LLC: Dr. Hans-R. Deppe, Thomas McCoy - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
