lkml.org 
[lkml]   [2005]   [Aug]   [31]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
From
SubjectRe: APIC version and 8-bit APIC IDs
Hi Maciej,

> It actually depends on the APIC type, rather than the CPU. E.g. with
> Pentium systems the width of the ID is either 4 bits or 8 bits,
> depending on whether the integrated or an external 82489DX APIC is
> used. This should be able to be determined by the APIC version; for
> v <= 0xf the ID is 8-bit and for v >= 0x10 it used to be 4-bit. Now
> you only need to determine what is the value of v above 0x10 that
> makes the ID 8-bit again.

That would be v>=0x14 for Intel. But that is wrong for AMD CPUs. The
actual Dual-Core Athlon CPUs we have report an APIC version of 0x10.
Please refer to the start of this thread.

Anyway, I understand that you agree this does not belong into the
subarch code?

Regards
Martin

--
Martin Wilck Phone: +49 5251 8 15113
Fujitsu Siemens Computers Fax: +49 5251 8 20409
Heinz-Nixdorf-Ring 1 mailto:Martin.Wilck@Fujitsu-Siemens.com
D-33106 Paderborn http://www.fujitsu-siemens.com/primergy
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/

\
 
 \ /
  Last update: 2005-08-31 16:30    [from the cache]
©2003-2011 Jasper Spaans