Re: how to tell linux (on x86) to ignore 1M or memory

[Rene Herman]

On 04/19/2007 04:18 PM, Bart Trojanowski wrote:

> I need to preserve some state from the bios before entering protected 
> mode.  For now I want to copy it into some ram accessible by real-mode, 
> say the last megabyte visible in real-mode.
>
> What's the easiest way to have linux ignore the megabyte starting at 15M?

Note that real-mode can only access the first megabyte (*) and not the first 
16. 16MB is the 16-bit protected mode (286) limit.

(*) well, the first 1M + 64K - 16 bytes using segment FFFF assuming A20 is 
enabled and x > 1 in x86...

Rene.
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/