[coreboot] EP80579 reference platform

Dustin Harrison dustin.harrison at sutus.com
Sat Apr 24 04:52:05 CEST 2010

Thanks for the idea Stefan.

I have yet to get SerialICE up, but I did manage to get the Truxton BIOS 
into QEMU.  Interesting that QEMU exceptions at the same (at least 
relative to C code) spot as my board hangs.  As a comparison (since so 
much of the i3100 code is shared) I was able to get the MtTarvon board 
up in QEMU with no crash.

Here is the output of QEMU with Truxton:
coreboot-4.0-r5422:5430M Fri Apr 23 19:46:42 PDT 2010 starting...
SMBus controller enabled

dimm qemu: fatal: triple fault
EAX=00000060 EBX=0000003c ECX=000002ff EDX=000003fd
ESI=00000020 EDI=00000035 EBP=00000050 ESP=00000050
EIP=ffff0769 EFL=00000002 [-------] CPL=0 II=0 A20=1 SMM=0 HLT=0
ES =0010 00000000 ffffffff 00cf9300
CS =0008 00000000 ffffffff 00cf9b00
SS =0010 00000000 ffffffff 00cf9300
DS =0010 00000000 ffffffff 00cf9300
FS =0010 00000000 ffffffff 00cf9300
GS =0010 00000000 ffffffff 00cf9300
LDT=0000 00000000 0000ffff 00008000
TR =0000 00000000 0000ffff 00008000
GDT=     ffff0044 00000017
IDT=     00000000 0000ffff
CR0=00000011 CR2=00000000 CR3=00000000 CR4=00000000
CCS=00000000 CCD=00000035 CCO=LOGICL
FCW=037f FSW=0000 [ST=0] FTW=00 MXCSR=00001f80
FPR0=0000000000000000 0000 FPR1=0000000000000000 0000
FPR2=0000000000000000 0000 FPR3=0000000000000000 0000
FPR4=0000000000000000 0000 FPR5=0000000000000000 0000
FPR6=0000000000000000 0000 FPR7=0000000000000000 0000

On 22/04/2010 1:05 PM, Stefan Reinauer wrote:
> Try tracing the original BIOS and coreboot with SerialICE and compare 
> the differences ... It's a bunch of work but not as ugly as debugging 
> ROMCC assembler output... :-) http://www.serialice.com/
> Stefan
> On 22.04.2010, at 20:16, Dustin Harrison <dustin.harrison at sutus.com> 
> wrote:
>> I did a diff of romstage.inc, using the same codebase (rev 5351) the 
>> only difference between romcc 4051 and 5351 was the timestamp.  This 
>> is consistent with my finding that compiling trunk with an older 
>> romcc didn't help the situation.
>> When I get done with my RAM timing I'll try an svn bisect to narrow 
>> it down.
>> Unfortunately I was not as lucky as Arnaud for timing.  I switched to 
>> 2T and that didn't help.   Unfortunately I am using unbuffered 
>> non-ECC SODIMMs and only have one slot unlike the truxton with ECC 
>> DIMMs and two slots.  The proprietary Truxton BIOS boots this board 
>> so I know there is hope, just need to nail the settings.
>> Cheers
>> Dustin
>> On 21/04/2010 10:17 PM, Peter Stuge wrote:
>>> Dustin Harrison wrote:
>>>> if anyone has some ideas I'll give them a shot in between hacking
>>>> the RAM.
>>> It would be interesting to also look at output from a recent version
>>> of romcc compiling the old code, and an old romcc compiling the new
>>> code. That could hint to either a romcc bug or something gone bad in
>>> the coreboot code.
>>> //Peter
>> -- 
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