Setting kernel options at compile time.

Setting kernel options at compile time.

[chip]

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I'm trying to get a 2.2.19 kernel loaded on an i810 system using RPLD on 
a diskless system.  I can get the kernel loaded and running.  The 
problem is the i810 needs the kernel parameter "mem=xxxM" set to tell 
the kernel how much memory the system has since the on the i810 the 
kernel doesn't know how much was taken for video.

The catch I'm running into is RPLD cannot pass parameters to the kernel 
and without this setting the system has video problem, most likely from 
the memory sharing issues.  When the mem parameter is set when using a 
disk it doesn't demonstrate any problems.

What I'm trying to figure out is how to compile in this setting.

Thanks,
Chip Schweiss
 

Re: Setting kernel options at compile time.

[Alan Cox]

> a diskless system.  I can get the kernel loaded and running.  The 
> problem is the i810 needs the kernel parameter "mem=xxxM" set to tell 
> the kernel how much memory the system has since the on the i810 the 
> kernel doesn't know how much was taken for video.

The BIOS itself marks off the block of memory used in VGA emulation
modes. The agpgart driver then gets used by X11 to allocate for the other
modes it uses.  At least for every i810 device I have ever seen.

Alan

Re: Setting kernel options at compile time.

[Brian Gerst]

Chip Schweiss wrote:
> 
> I'm trying to get a 2.2.19 kernel loaded on an i810 system using RPLD on
> a diskless system.  I can get the kernel loaded and running.  The
> problem is the i810 needs the kernel parameter "mem=xxxM" set to tell
> the kernel how much memory the system has since the on the i810 the
> kernel doesn't know how much was taken for video.
> 
> The catch I'm running into is RPLD cannot pass parameters to the kernel
> and without this setting the system has video problem, most likely from
> the memory sharing issues.  When the mem parameter is set when using a
> disk it doesn't demonstrate any problems.
> 
> What I'm trying to figure out is how to compile in this setting.
> 
> Thanks,
> Chip Schweiss

Try a 2.4 kernel.  If the BIOS is reserving memory for the video card it
should show up in the e820 memory map.  2.2.x last I checked doesn't use
e820 for memory detection.

-- 

						Brian Gerst

Re: Setting kernel options at compile time.

[H. Peter Anvin]

Followup to:  <H00000650007236c.0989014582.dublin.innovates.com@MHS>
By author:    (Chip Schweiss) chip@innovates.com
In newsgroup: linux.dev.kernel
> 
> The catch I'm running into is RPLD cannot pass parameters to the kernel 
> and without this setting the system has video problem, most likely from 
> the memory sharing issues.  When the mem parameter is set when using a 
> disk it doesn't demonstrate any problems.
> 

What is RPLD?

	-hpa
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