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= BBAR on ICH8 =
There is no sign of BBAR (BIOS Base Address Configuration Register) in the
public datasheet (or specification update) of the ICH8. Also, the offset of
that register has changed between ICH7 (SPIBAR + 50h) and ICH9 (SPIBAR +
A0h), so we have no clue if or where it is on ICH8. Out current policy is to
not touch it at all and assume/hope it is 0.
= Accesses beyond region bounds in descriptor mode =
Intel's flash image tool will always expand the last region so that it covers
the whole flash chip, but some boards ship with a different configuration.
It seems that in descriptor mode all addresses outside the used regions can not
be accessed whatsoever. This is not specified anywhere publicly as far as we
could tell. flashrom does not handle this explicitly yet. It will just fail
when trying to touch an address outside of any region.
See also http://www.flashrom.org/pipermail/flashrom/2011-August/007606.html
= Unlocking the ME region =