| Stefan Tauner | 25ffba7 | 2011-11-13 23:03:30 +0000 | [diff] [blame] | 1 | = BBAR on ICH8 = |
| 2 | There is no sign of BBAR (BIOS Base Address Configuration Register) in the |
| 3 | public datasheet (or specification update) of the ICH8. Also, the offset of |
| 4 | that register has changed between ICH7 (SPIBAR + 50h) and ICH9 (SPIBAR + |
| 5 | A0h), so we have no clue if or where it is on ICH8. Out current policy is to |
| 6 | not touch it at all and assume/hope it is 0. |
| 7 | |
| 8 | = Accesses beyond region bounds in descriptor mode = |
| 9 | Intel's flash image tool will always expand the last region so that it covers |
| 10 | the whole flash chip, but some boards ship with a different configuration. |
| 11 | It seems that in descriptor mode all addresses outside the used regions can not |
| 12 | be accessed whatsoever. This is not specified anywhere publicly as far as we |
| 13 | could tell. flashrom does not handle this explicitly yet. It will just fail |
| 14 | when trying to touch an address outside of any region. |
| 15 | See also http://www.flashrom.org/pipermail/flashrom/2011-August/007606.html |
| 16 | |
| 17 | = Unlocking the ME region = |
| 18 | TODO |