[coreboot] EP80579 reference platform

[Stefan Reinauer]

Eric,

do you have a hint what could cause romcc to produce incorrect code
without -fno-simplify-phi ?

Stefan

On 4/26/10 4:23 PM, Myles Watson wrote:
> 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
>
>   


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