[LinuxBIOS] flashrom erase failed
Marc Jones
marc.jones at amd.com
Mon Oct 1 22:22:18 CEST 2007
Lane Brooks wrote:
> I am trying to flash an SST49LF008A on a board with a Geode CS5536AD
> southbridge using flashrom. It reads fine, but when I try to write, it
> failed with an ERASE FAILED message. Any ideas on why?
>
> Thanks,
> Lane Brooks
>
Lane,
Geode systems write protect the BIOS via RCONFs (cache settings similar
to MTRRs). Change MSR 0x1808 top byte to 0x22. Then run flashrom.
> rdmsr 0x1808
MSR register 0x1808 => 25:ff:fc:02:13:f7:df:00
> wrmsr 0x1808 22:ff:fc:02:13:f7:df:00
MSR register 0x1808 => 22:ff:fc:02:13:f7:df:00
Marc
--
Marc Jones
Senior Firmware Engineer
(970) 226-9684 Office
mailto:Marc.Jones at amd.com
http://www.amd.com/embeddedprocessors
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