[flashrom] SB700 IMC disabling

[Carl-Daniel Hailfinger]

Hi Zheng,

do you know anyone at AMD who could help us with those IMC problems or
at least tell us how to stop the IMC?

Regards,
Carl-Daniel

On 19.08.2010 12:23, Bao, Zheng wrote:
> Sorry, I don't have any idea about imc accessing.
>
> Zheng
>
>   
>> -----Original Message-----
>> From: Carl-Daniel Hailfinger
>> [mailto:c-d.hailfinger.devel.2006 at gmx.net]
>> Sent: Thursday, August 19, 2010 6:10 PM
>> To: flashrom; Bao, Zheng; Matthias Kretz
>> Subject: [flashrom] SB700 IMC disabling
>>
>> Hi Zheng,
>>
>> running flashrom on certain systems with SB700 family chipsets will
>> result in read and write corruption. I have added a corruption check
>> to latest flashrom, and it seems that the IMC will access flash even
>> if flashrom holds the BiosSemaphore (LPC bridge config space register
>> 0x40, bit 5).
>>
>> Matthias Kretz owns a Supermicro H8DGT with this problem, but other
>> boards (including a MITAC development board) exhibit the same issue.
>> If we use flashrom to write, the SPI registers (especially FIFO
>> counter and FIFO) will lock up after some time, and we have not been
>> successful in getting the stuck board working again.
>>
>> Is there a way to stop the IMC from the host or to stop all IMC flash
>> accesses (including read and instruction fetch)?
>>
>> Regards,
>> Carl-Daniel
>>     


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