[coreboot] EP80579 reference platform

[Myles Watson]

On Mon, Apr 26, 2010 at 7:43 AM, Stefan Reinauer <stepan at coresystems.de> wrote:
> On 4/26/10 3:34 PM, Myles Watson wrote:
>>> The problem with Truxton booting in trunk seems to have appeared in the
>>> migration to the new Makefile system.
>>>
>>> If I drop a CONFIG_SSE=y into the .config file using a trunk build I can
>>> boot!
>>>
>>> However, I don't really see how this flag gets set.  Doing a 'grep -RH
>>> CONFIG_SSE' points to the two makefile includes that add the enable_sse
>>> code, but no references to setting the flag.
>>>
>> I added it in 5505.  I think we should put an #error in the file that
>> uses these instructions if CONFIG_SSE isn't set.
>>
>
> There is no specific instruction in our code causing this, but a hard
> code of ROMCCFLAGS in mainboard/intel/truxton/Makefile.inc:
I forgot that romcc was using the SSE registers.

> ROMCCFLAGS := -mcpu=p4 -fno-simplify-phi -O2
Without the line it fails to build.

It builds with this line:
ROMCCFLAGS += -fno-simplify-phi

With this line it fails to allocate enough registers:
ROMCCFLAGS := -fno-simplify-phi -O2

Thanks,
Myles