Hello Arthur,

CPUID 1067x? Penryn? https://en.wikipedia.org/wiki/Penryn_(microprocessor) ?!

It is long time off any radar screen for INTEL IOTG support, I can tell to you this... Started production in 2007! :-(( WTH you need Coreboot on this one?

"The WBINVD instruction is a privileged instruction. When the processor is running in protected mode, the CPL of a program or procedure must be 0 to execute this instruction. This instruction is also a serializing instruction (see "Serializing Instructions" in Chapter 8 of the IA-32 Intel Architecture Software Developer's Manual, Volume 3)."

Question to you: do you execute this instruction (WBINVD) in Ring 0 (kernel) mode? If you do, and it still hangs, I have for you a good suggestion: try to replace WBINVD with INVD and see if you'll hang (simple logic stands behind what I read there: http://x86.renejeschke.de/html/file_module_x86_id_325.html).

If you hang: your problem is for sure/100% NOT raminit (in other words MRC);

If you do NOT hang, and continue: raminit (MRC) might be (but not certainly???) your problem. If you hang later (while accessing DDRAM), then it is obvious! ;-)

Good luck with this one,

Zoran

On Sun, Oct 9, 2016 at 6:50 PM, Arthur Heymans <arthur@aheymans.xyz> wrote:

Hi

I'm trying to port coreboot to the gigabyte ga-945gcm-s2l, which has a
945gc northbridge, a ich7 southbridge and a ite it8718f sio. I'm trying
all this with a 1067fsb cpu, so in that last aspect there is no
precedent in coreboot.

I encountered some raminit issues where the MCHBAR(CLKCFG) was
incorrectly written, but this was fixed in
https://review.coreboot.org/#/c/16940/.

Right now I'm stuck in smm_init in southbridge/intel/i82801gx/smi.c.
The boot process completely hangs when wbinvd() is called which supposed
to "Write Back and Invalidate Cache" according to
http://x86.renejeschke.de/html/file_module_x86_id_325.html.

What does this mean? Did the raminit not work?

--
Kind regards

Arthur Heymans

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