[SerialICE] The strangest post codes

[Joseph Smith]

On 03/31/2011 06:03 PM, Stefan Reinauer wrote:
> * Joseph Smith<joe at settoplinux.org>  [110331 23:38]:
>> i855
>> -------
>> IO: outl 0cf8<= 8000f8a4
>> IO:  inb 0cfc =>  01
>> PCI 0:1f.0 R.a4
>> IO: outl 0cf8<= 8000f8a4
>> IO: outb 0cfc<= 00
>> PCI 0:1f.0 R.a4
>
> Looks undocumented in the public data sheets (ICH4?)
>
Yes ICH4. I believe this is GEN_PMCON_3 resume after power failure.

>> IO:  inb 04b9 =>  02
>> IO: outb 04b9<= 03
>
> If PMBASE is at 0x480, this would be a write to Alternate GPI SMI Enable
>
yup

>> IO: outw 0080<= fea0
>
>> IO: outl 0cf8<= 800000fc
>> IO: outw 0cfc<= 0109
>> PCI 0:00.0 R.fc
>
> Undocumented in Memory Controller
>
Yes but it is listed in lspci -xxx of a good boot so I am assuming not 
to worry about it.

>> IO: outw 0080<= eee3
>
> Probably the same error as above.
>
>> --craps out after this----
>>
>> Anyone ever seen these 16bit post codes before? Help?
>
> They're quite common these days. Presumably eexx describes some error
> code. At some point the BIOS thought something is wrong with the system.
>
> You will have to figure out where the BIOS is taking a jump to the wrong
> code path and make sure you satisfy its requirements.
>
> Does this BIOS use Cache As RAM? Did you initialize the CAR region
> correctly?
>
> Try enabling some of the debug flags in the lua script.
>
Ok attached is a more verbose output of i855. Not sure if this bios uses 
CAR? How do I tell? So do I need to use gdb to backtrace what jumps to 
[eb00:1202]?


-- 
Thanks,
Joseph Smith
Set-Top-Linux
www.settoplinux.org
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