Re: porting coreboot to Enter ATX Motherboard E-G41D2

Hi Ashok,

Am 26.06.26 um 07:16 schrieb Ashok Arora:
> Hi all,
> I am planning to port coreboot to the *Enter ATX E-G41D2*(Intel G41 + 
> ICH7), a low-cost, popular alternative to the supported *Gigabyte GA- 
> G41M-ES2L*in the Indian market.
> 
> Using the |gigabyte/ga-g41m-es2l| port as a baseline, I have a few quick 
> questions before I begin:
> 
>  1.
> 
>     *GPIO Mapping:* Is dumping registers via |inteltool| the most
>     reliable method to identify ICH7 GPIO differences from the vendor BIOS?

yes, absolutely. You may want to use the intelp2m tool afterwards to 
turn the output of inteltool into C code for the gpio.h file.

I'm not sure from which comparison you want to draw those differences; 
I'd start with just dumping the vendor bios' GPIO configuration and then 
using that as a starting point in coreboot.

> 
>  2.
> 
>     *Super I/O Delta:* If the physical Super I/O chip differs from
>     Gigabyte's ITE IT8718F, which primary configuration files (aside
>     from |Kconfig| and |devicetree.cb|) require updates?

If you're in luck, you'd just adjust devicetree.cb with the correct 
superio chip (if already supported) and tune some settings. If coreboot 
does not support your chip already, you may need to write some code 
inside src/superio/.

> 
>  3.
> 
>     *Native Raminit:* Are there any known routing or DIMM slot layout
>     edge cases that cause native |x4x| raminit to fail on non-reference
>     boards?

Not that I know of. It will likely "just work" if the RAM SPDs are on 
the default addresses, and if not, you'll figure it out ;). (Worst-case 
is that raminit fails, but there should be no hardware damage, so you 
can just try it out.)

Happy hacking!
Florian


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Florian Jung
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