Re: [patches] [patch 3/5] x86: Add PCI extended config space access for AMD Barcelona

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

 



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/

[Index of Archives]     [Kernel Newbies]     [Netfilter]     [Bugtraq]     [Photo]     [Stuff]     [Gimp]     [Yosemite News]     [MIPS Linux]     [ARM Linux]     [Linux Security]     [Linux RAID]     [Video 4 Linux]     [Linux for the blind]     [Linux Resources]
  Powered by Linux