lkml.org 
[lkml]   [2005]   [Oct]   [27]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
SubjectRe: 4GB memory and Intel Dual-Core system
From
Date
    > BIOS-provided physical RAM map:
> BIOS-e820: 0000000000000000 - 000000000009fc00 (usable)
> BIOS-e820: 000000000009fc00 - 00000000000a0000 (reserved)
> BIOS-e820: 00000000000edbb0 - 0000000000100000 (reserved)
> BIOS-e820: 0000000000100000 - 00000000cec11000 (usable)
> BIOS-e820: 00000000cec11000 - 00000000cee12000 (ACPI NVS)
> BIOS-e820: 00000000cee12000 - 00000000cf68f000 (usable)
> BIOS-e820: 00000000cf68f000 - 00000000cf6e9000 (ACPI NVS)
> BIOS-e820: 00000000cf6e9000 - 00000000cf6ed000 (usable)
> BIOS-e820: 00000000cf6ed000 - 00000000cf6ff000 (ACPI data)
> BIOS-e820: 00000000cf6ff000 - 00000000cf700000 (usable)

If that's the full e820 map, then I guess the question is why did the
BIOS not tell you about any memory above 0xcf700000?

And I have no idea why it wouldn't. For comparison, here's an AMD64
system I have with 4 GB of RAM. Notice how it put a big chunk of RAM
above 4G:

BIOS-e820: 0000000000000000 - 0000000000098800 (usable)
BIOS-e820: 0000000000098800 - 00000000000a0000 (reserved)
BIOS-e820: 00000000000c2000 - 0000000000100000 (reserved)
BIOS-e820: 0000000000100000 - 00000000bff20000 (usable)
BIOS-e820: 00000000bff20000 - 00000000bff2a000 (ACPI data)
BIOS-e820: 00000000bff2a000 - 00000000bff80000 (ACPI NVS)
BIOS-e820: 00000000bff80000 - 00000000c0000000 (reserved)
BIOS-e820: 00000000d8800000 - 00000000d8800400 (reserved)
BIOS-e820: 00000000d8801000 - 00000000d8801400 (reserved)
BIOS-e820: 00000000e0000000 - 00000000f0000000 (reserved)
BIOS-e820: 00000000fec00000 - 00000000fec00400 (reserved)
BIOS-e820: 00000000fee00000 - 00000000fee01000 (reserved)
BIOS-e820: 00000000fff80000 - 0000000100000000 (reserved)
BIOS-e820: 0000000100000000 - 0000000140000000 (usable)

- R.
-
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: 2005-10-27 22:57    [W:0.042 / U:0.088 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site