[OLPC-devel] Embedded Controller and Serial Flash ROM

[Mark J. Foster]

Hi, Folks!

As I scanned through 'devel' this weekend, I noticed an important 
absence in the serial ROM Flash layout.  The 512K serial Flash ROM is 
actually shared between the system BIOS and the embedded controller.  
Upon power-up, the embedded controller reads its code from the first 64K 
of the serial Flash - we therefore need to reserve the first 64K of the 
serial Flash for the EC.

Thus far, we've basically been dealing with a "dead" EC, for the system 
is only running off the power-up default states of the EC pins.  
However, Quanta's nearly ready to release the first revision of this 
code, so we'll have to start organizing the BIOS to be prepared for that 
release fairly soon.

Sorry to aggravate the code space challenge, but this is inherent to the 
hardware structure of the machine!

Cheers!
Mark