[coreboot] The default value of TOM (MSRC001_001A) just after Power-On

Darmawan Salihun darmawan.salihun at gmail.com
Fri Jan 22 03:59:19 CET 2010


Hi Mark,

Thanks. I'll have a look.

-Darmawan

On 1/22/10, Marc Jones <marcj303 at gmail.com> wrote:
> On Wed, Jan 20, 2010 at 2:13 AM, Darmawan Salihun
> <darmawan.salihun at gmail.com> wrote:
>> The default value of MSRC001_001A (Top of Memory below the 4GB limit)
>> according to BKDG for AMD Fam 10h rev. 3.06 is undefined (after
>> Reset/power-on).
>> However, AMD64 Architecture Programmer's Manual Volume 2: System
>> Programming Rev. 3.14 states that the value of MSRC001_001A
>> after Reset or power on is: 0000_0000_0400_0000h
>>
>> Which one of this information is correct?
>>
>> I need to know it because I want to know what is the default MMIO range
>> after reset.
>
> Hi Darmawan,
>
> I think that the BKDG is correct.  I get 000_0001F_7780_0000 on a K8.
> You can take a look at cpu/amd/car/cache_as_ram.inc for the initial
> setup.
>
> Marc
>
> --
> http://se-eng.com
>


-- 
Regards,

Darmawan Salihun
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