[LinuxBIOS] flashrom support for AMD Geode CS5536

Stefan Reinauer stepan at coresystems.de
Tue Oct 2 19:01:26 CEST 2007

* ron minnich <rminnich at gmail.com> [071002 18:38]:
> > My questions are:
> > - I do not think this is portable beyond linux.  Is that an issue?
> it's not, but it is not really an issue at present.

Maybe the code should be #ifdef'ed __linux__ with an #else case just
printing a warning a la "Not supported by this OS yet."

> I thought that was in the structure of flashrom. Now that I look, it
> seems like we lost it!

Flashrom never did any such cleanup. I was about to implement it when we
renamed the tool but then I stumbled upon this:

printf("OK, only ENABLING flash write, but NOT FLASHING.\n");

So obviously at some point there was a sense in leaving the system in
such a state. But I want to propose that we drop this behavior and
instead try to always leave the machine in the state we entered it.
Especially when not flashing.

While one might want to mess with an unprotected flash on purpose, for
99% of the cases this is just opening another security issue.
That one % that theoretically might use this as a feature is welcome to
improve the flashrom utility instead of running it for flash
unprotection before running another utility.

> I propose this at the end of flashrom:
> board_flash_disable(lb_vendor, lb_part);
> chipset_flash_disable(chipset);

yepp. Agreed.

> but we'll need to change some things to make this all work. We need a
> penable struct * to use for the disable; no point in searching each
> time we touch a chip. or not?

To achieve this

struct board_pciid_enable *board in board_enable.c:board_flash_enable() 


enables[i] in chipset_enable.c:chipset_flash_enable() 

should be globally available.

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