lkml.org 
[lkml]   [1998]   [Jul]   [6]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
From
SubjectRe: x86 36-bit support easier with Xeon?
Date
Followup to:  <199807062200.AAA00813@stefan.sime.com>
By author: Stefan Traby <stefan@sime.com>
In newsgroup: linux.dev.kernel
>
> Hi !
>
> > 'How do we DMA into >4G physical RAM?'
> >
> > 2) PCI cards which support 64 bit addresses might work (ie. none of most
> > current PCI cards, and i guess chipsets arent too overtested either,
> > regarding this feature).
>
> Hmm, the current "64 bit" PCI-Slots (ex. on Alphas) allow 64 Bit data but
> only 32 bit addresses. This is no real problem for current boards
> (UX && BX: 6x512M == 3GB max mem); but I'm not shure if the PCI specs
> covers 64 bit addresses at all; I don't think so.
>

They do, but it's an extension, and most cards don't support them it
seems.

-hpa
--
PGP: 2047/2A960705 BA 03 D3 2C 14 A8 A8 BD 1E DF FE 69 EE 35 BD 74
See http://www.zytor.com/~hpa/ for web page and full PGP public key
I am Bahá'í -- ask me about it or see http://www.bahai.org/
"To love another person is to see the face of God." -- Les Misérables

-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.rutgers.edu

\
 
 \ /
  Last update: 2005-03-22 13:43    [from the cache]
©2003-2011 Jasper Spaans