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Date: Sat, 06 Dec 2003 13:44:18 -0700
From: Scott Long <scottl@freebsd.org>
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To: de-boysson.charles-henri@epita.fr
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cc: freebsd-current@freebsd.org
Subject: Re: 5.2 Beta unable to boot
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de-boysson.charles-henri@epita.fr wrote:
> Hi,
> 
> I just tried the miniinst 5.2-BETA (kernel dated 11/25/03) on my
> computer but it couldn't even boot. My mother board is a A7N8X Delux with
> 1Gb of main memory. It uses a NForce2 chip. The graphic card is _not_
> embeded in the chip : I use an external GF2MX. The BIOS finds it on IRQ 11.
> I wrote down by hand the last lines of the panic:
> 
> agp0: <NVIDIA nForce2 AGP Controler> mem 0xa0000000 - 0xbfffffff at dev 0.0 on pci0
> panic: pmap_mapdev: couldn't alloc kernel virtual memory
> cpuid 0;
> 
> And then to debugger :(.
> 
> I tried a 'where' command. Here are the latest functions called :
> device_probe_and_attach
> root_bus_configure
> configure
> mi_startup
> begin
> 
> The panic also happens with the 12/03/03 ans 12/02/03 mini isos. 
> The same MB boots 4.9-Stable correctly.
> 
> I don't have a trace or boot -v log as I don't boot from serial. If it is
> needed, I'm sure I can look into dusty drowers or ask a friend and get
> a serial cable to do that.
> 
> I don't really know how to get more informations with a panic that early
> in the boot process, but I'll gladly follow instructions.
> 


The onboard nForce2 function is trying to allocate a 512MB AGP window.
Can you disable the function in the BIOS, or at least tell it to
reduce the AGP window to something much smaller?

Scott