[coreboot] [newbie] support for GA-M57SLI-S4 and AMD Phenom (K10) possible?

[Carl-Daniel Hailfinger]

On 29.07.2008 00:28, Marc Jones wrote:
> Marc Jones wrote:
>> Carl-Daniel Hailfinger wrote:
>>> On 28.07.2008 22:34, Marc Jones wrote:
>>>> Peter Stuge wrote:
>>>>> On Mon, Jul 28, 2008 at 01:13:43PM -0600, Marc Jones wrote:
>>>>>> There is FAM10 (K10) support in coreboot. The platform would need
>>>>>> to be ported to the Fam10 code. I would be happy to assist anyone
>>>>>> who would like to do the port.
>>>>> Does the Fam10 code also handle K8 or would there be one coreboot
>>>>> target for m57sli+k8 and one for m57sli+fam10 ?
>>>>>
>>>> There needs to be one for each. The fam10 code has some significant
>>>> differences.
>>>
>>> Would it be possible to support both K8 and K10 in one image? I gather
>>> that the code is not entirely different, so sharing some stuff may be
>>> possible.
>>> The big issue I see is CAR setup. I can code up a version of the CAR
>>> code which has no ifdefs and handles both family 0Fh and family 10h.
>>> That depends on whether there's a short code sequence not using too
>>> many
>>> registers which can detect family 10h presence. AFAICS CPUID always
>>> clobbers EAX,EBX,ECX,EDX, so we need to have that sequence quite early
>>> and store the result somewhere.
>>
>> The CPUs are socket compatible but they are a generation apart. The
>> MC, HT and much of the CPU init are different. You would need
>> complete versions of all the init for both families and the runtime
>> checking on what path to take. Basically, you have two BIOS in one. I
>> don't know if that is the right thing to work on but I guess if you
>> are motivated.... patch away.
>>
>> Marc
>
> Hmmm.. We already do two BIOS in one. You could do cpuid detection in
> a failover image and then choose between a fam10 and a K8 image. It
> would require some work around the image building and you would still
> need to do a mainboard port for fam10.

If I ever tackle that project, I will be doing it for v3 only. Dealing
with the v2 build system is not my idea of fun.

I only mentioned the dual family support because it seems vendor BIOSes
can do it.

Regards,
Carl-Daniel

-- 
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