[LinuxBIOS] K8 CAR issue

Lu, Yinghai yinghai.lu at amd.com
Wed Oct 19 03:55:57 CEST 2005

Any reason for you to use HDT? 


Can you disable the XIP and have a try?





From: linuxbios-bounces at openbios.org
[mailto:linuxbios-bounces at openbios.org] On Behalf Of San Mehat
Sent: Tuesday, October 18, 2005 4:59 PM
To: LinuxBIOS
Subject: [LinuxBIOS] K8 CAR issue



  I've been experimenting with getting the Cache as Ram stuff working
with my experiments, and have run into a puzzling issue relating to XIP.

In amd/cache_as_ram.inc, as soon as the writes to MSR 203 completes, my
system crashes. Using my HDT, it looks like the entire memory image gets
all buggered up as well.

The offending segment of code appears to be:
0008:FFFF7312 B902020000       MOV         ECX,00000202
0008:FFFF7317 31D2                  XOR         EDX,EDX
0008:FFFF7319 B80600FEFF       MOV         EAX,fffe0006
0008:FFFF731E 0F30                 WRMSR       
0008:FFFF7320 B903020000       MOV         ECX,00000203
0008:FFFF7325 BA0F000000       MOV         EDX,0000000f
0008:FFFF732A B80008FEFF       MOV         EAX,fffe0800
0008:FFFF732F 0F30                  WRMSR        <--------------- POW...

In my Config.lb, XIP options are:

default XIP_ROM_SIZE=65536

Any ideas YH? ;)



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