[LinuxBIOS] Intel Southbridge ROM Protection mechanism
stepan at coresystems.de
Fri Apr 20 01:37:54 CEST 2007
* Darmawan Salihun <darmawan.salihun at gmail.com> [070419 19:22]:
> the matter, does Intel ICH5 southbridge (or other newer Inte southbridge)
> still protects (probably mirrors) the last 8KB block (bootblock) in the BIOS
> chip even when the protection bits in Block Locking Registers (BLRs) has been
> I experienced weird results between several flashing attempts using
> flashrom in Linux. SOme succeeded, some retain the original values. Anyone has
> an explanation on the issue?
Some flash chips support "write protecting" their boot block (and/or other
blocks). I think the data sheets have more details on this.
What flash chip are you using?
Usually if the south bridge or a GPIO does the protection, you'd be able
to write all or nothing. AFAIK
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