lkml.org 
[lkml]   [2004]   [Jun]   [2]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
From
SubjectRe: Intel 875 Motherboard cant use 4GB of Memory.
Date

Wrong. Ever since the Pentium Pro, x86 processors have had 36-bit
*physical* addressing. This is why PAE-mode paging was introduced. A
sane BIOS would configure the memory controller to remap some of the
memory above 4G physical to allow for memory mapped devices. It sounds
like this board's BIOS isn't doing that, or at least not reporting it in
the e820 map.

---

Hummm.

Let me restate the fact that I dont understand how PC hardware works, but
I can understand how the area for PCI devices has to come out of the
KERNEL address space, but why does it have to be subtracted from the USER
address space too?


--
Reg.Clemens
reg@dwf.com






-
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: 2005-03-22 14:03    [W:0.053 / U:0.472 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site