Difference between revisions of "GM45 Thinkpad Internal flashing research"

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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.