Re: [coreboot] Coreboot with an UEFI payload to boot (Clover) an Thinkpad X230 Hackintosh

[Zoran Stojsavljevic]

> Then I’ve tried Coreboot/TianoCore (on flash) + Grub2(EFI)/Ubuntu (on
> disk), and it didn’t worked. I have a black screen with a blinking cursor
> (top left screen).

Hello Fred,

Let me clear for you the theory, since I see that you need a bit more
knowledge here (I apologize for not using text mode, since I import picture
in this email).

Let me import the picture how your stock UEFI (BIOS) looks like:

[image: Inline image 1]

You see, your INTEL FSP and Coreboot are nothing more, then SEC + PEI
(intermingled), where in PEI phase CPU + Chipset Init (most of it) belong
to FSP, less of Chipset Init + almost entire Board Init belong to Coreboot,
+ minimal of DXE (the minimum set of drivers to make OS boot loader to
work).

Tiano Core is the following: entire/full set of DXE (device drivers) with
UEFI calls, to make it UEFI compatible, + probably Boot Dispatcher.

(Final) OS Boot loader is actually GRUB2.

Here, (again), *somebody from GOOGLE Coreboot folks should help* you with
this transition (from DXE/Tiano Core to OS Boot Loader/GRUB2). OK?

Or, you can also post some complete debug traces (from FSP till GRUB2 or
whatever), so me and/or somebody else should look into them, to see what is
going on here???

Zoran
_______

On Mon, Jan 1, 2018 at 7:57 PM, my First name is Test And my last Name is
iPation  wrote:
> > While doing Coreboot + Tiano Core (or UEFI) in flash & GRUB2 + Ubuntu
> > on drive, you should check and see if you see the same as me?! At
> > least using stock BIOS???
> > _______
>
> Hi Zoran,
> I think you missed some lines in my previous replies:
>
> I’ve tried the stock UEFI Bios (on flash) + Grub2(EFI)/Ubuntu (on 1st
> disk, 1st to boot) + Clover(EFI)/macOS (on 2nd disk), well, it worked,
> Grub(EFI) can chainload to boot Clover (which boot macOS).
> So yes, I agree with you with the efi hierarchy, and grubx64.efi. It
> works with stock EFI Bios.
>
> Then I’ve tried Coreboot/TianoCore (on flash) + Grub2(EFI)/Ubuntu (on
> disk), and it didn’t worked. I have a black screen with a blinking
> cursor (top left screen).
> > > So I’ve tried to build a Grub2 EFI as payload for Coreboot, but without
>
> success.
> > Nope. You have GRUB2 on drive, already. You should build Coreboot +
> > Tiano Core in flash (then have drive GRUB2 + Ubuntu), but here
> > somebody from Coreboot-GOOGLE folks should give you a hand.
> >
> > Should work, as my best understanding is.
> >
> > Zoran
> > _______