Subject: Re: Problem with fxp network card on an Intel IXDP425 board
To: Steve Woodford <>
From: Christophe Gouault <>
List: port-arm
Date: 03/05/2004 15:09:19

Thank you very much,

you were right, the problem is actually 2) :
if I restrict bootconfig.dram[0].pages to 64 MB, boot process goes on 
and I receive the login prompt.

Steve Woodford wrote:

>On Friday 05 March 2004 10:59 am, Christophe Gouault wrote:
>>I'm trying to boot NetBSD on an Intel IXDP425 board.
>>I use the Intel PRO/100+ NIC shipped with the board (connected on PCI
>>slot 0).
>>Boot processes correctly but I never gain access to the login prompt:
>>the fxp NIC keeps displaying the following error message:
>>fxp0: WARNING: SCB timed out!
>>Any idea of what is happening and what to do ?
>There are two problems with NetBSD-current's PCI support on IXP425:
>1) It always maps PCI memory regions into the IXP425's prefetchable 
>window, even if the PCI BAR says it needs a non-prefetch mapping.
>2) The bus_dma(9) back-end cannot handle more than 64MB of SDRAM. 
>Specifically, it does not use bounce-buffers for DMA requests which 
>fall outside the 64MB PCI->SDRAM window.
>You could try hard-coding 'bootconfig.dram[0].pages' to 64MB in 
>ixdp425_machdep.c to see if you're falling foul of 2). If it still 
>fails to boot, then 1) is more likely.
>Cheers, Steve