Re: [coreboot] Atom platform porting problem.

[Scott.Hsiao]

Hi! Mansoor,
It works after adding your patch.
Now coreboot can go on to load the payload (and die XD) and this is just a
second time trial build.
Seems like I have more work to do now.

Thank you to  everyone.

Scott Hsiao

-----Original Message-----
From: Mansoor [mailto:[e-mail]] 
Sent: Tuesday, December 01, 2009 1:37 PM
To: 'Myles Watson'; 'Scott.Hsiao'; 'coreboot'
Subject: RE: [coreboot] Atom platform porting problem.

Hi Scott,

I am also working on Intel atom based platform.
I got the same problem
Please try to change the following line 
    /* Setup MTRRs */
    x86_setup_mtrrs(36);

to

/* Setup MTRRs */
    x86_setup_mtrrs(32);

Atom support only 32 bit address lines
> -----Original Message-----
> From: [e-mail] 
> [mailto:[e-mail]]
> On Behalf Of Myles Watson
> Sent: Tuesday, December 01, 2009 9:04 AM
> To: 'Scott.Hsiao'; 'coreboot'
> Subject: Re: [coreboot] Atom platform porting problem.
> > > > DONE fixed MTRRs
> > > > call enable_fixed_mtrr()
> > > > Setting variable MTRR 0, base: 0MB, range: 512MB, type WB 
> > > > ADDRESS_MASK_HIGH=0xf Unexpected Exception: 13 @ 10:001025e9 -
>
> Halting
> > > > Code: 0 eflags: 00010002
> > > > eax: e0000800 ebx: 0000000f ecx: 00000201 edx: 0000000f
> > > > edi: e0000000 esi: 00000000 ebp: 0000000f esp: 00139df4
>
> The register contents look like they are from setting the MTRR, so I'd 
> think the problem was there.
>
> It seems like some processors don't like having too many bits of the 
> MTRRs set.  I would suggest hacking it so that it doesn't set the 
> upper bits to see if that makes a difference.
>
> Thanks,
> Myles
>
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