[coreboot] [PATCH] ASUS P2B-LS support, RAM detection for 440BX, add Slot 1 CPU, Microcode for Intel Tualatin CPUs

Mark Marshall mark.marshall60 at ntlworld.com
Thu Mar 4 11:05:57 CET 2010

On 03/03/10 04:19, Keith Hui wrote:
> Hi all,
> This thing is now ready for more exposure. Scratch my previous "patch" -
> this is my first real deal.
> - Adds RAM detection for i440bx (based on i82830 code). We're no longer
> hard coded for 64MB on one row!

I've tried this with my ASUS P2B, and it's not quite there yet.

The first problem is that this motherboard only has three DIMM slots. 
This means you have to set SDRAMC to something different; 0x0103 works 
for me.

I'm guessing that we will need a motherboard config option for this - 
there doesn't seem to be one suitable?  Something like:


	default 3
	depends on BOARD_ASUS_P2B

The second problem is that it doesn't work with more that 256 MB of 
memory.  I've had one stick of 128 MB work, two sticks of 128 MB and one 
stick of 256 MB all work, but two sticks of 256 MB doesn't boot linux.

Has anyone got any idea as to what might be wrong?  If I get the time 
I'll try to boot with the real BIOS and see what that sets the register 
up to in different configs.

This is great work though!

Many thanks,


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