Re: [LinuxBIOS] Intel Southbridge ROM Protection mechanism

[Stefan Reinauer]

* Darmawan Salihun  [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
> disabled?
>     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