GM45 Thinkpad Internal flashing research: Difference between revisions
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(Created page with "Here is [http://paste.flashrom.org/view.php?id=2717 a log] of flashrom on the flash chip of an X200T") |
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Here is [http://paste.flashrom.org/view.php?id=2717 a log] of flashrom on the flash chip of an X200T | Here is [http://paste.flashrom.org/view.php?id=2717 a log] of flashrom on the flash chip of an X200T | ||
In the log, we can see that the BIOS region is set read-write in the flash descriptor: | |||
Descr. BIOS ME GbE Platf. | |||
BIOS r rw rw rw | |||
ME r rw rw | |||
GbE rw | |||
The issue is that the BIOS reagion is still partially locked: | |||
0x74: 0x9fff07e0 PR0: Warning: 0x007e0000-0x01ffffff is read-only. | |||
The flash descriptor probably cannot be reflashed easily from the x86 CPU, however messing with the ME partition is probably doable if we get luck with the BIOS: | |||
If we remove the RAM from slot0, the BIOS outputs an error message on the screen and refuses to boot. I guess it's related to what mysteries_intel.txt (inside flashrom source ) was mentionning. | |||
Revision as of 23:00, 17 January 2015
Here is a log of flashrom on the flash chip of an X200T In the log, we can see that the BIOS region is set read-write in the flash descriptor:
Descr. BIOS ME GbE Platf. BIOS r rw rw rw ME r rw rw GbE rw
The issue is that the BIOS reagion is still partially locked:
0x74: 0x9fff07e0 PR0: Warning: 0x007e0000-0x01ffffff is read-only.
The flash descriptor probably cannot be reflashed easily from the x86 CPU, however messing with the ME partition is probably doable if we get luck with the BIOS: If we remove the RAM from slot0, the BIOS outputs an error message on the screen and refuses to boot. I guess it's related to what mysteries_intel.txt (inside flashrom source ) was mentionning.