Bay Trail 32bit UEFI

Post by Joe Holden
Hi all,
Apologies if this is the wrong list...
Is there any plan to support booting FreeBSD on 32bit UEFI systems (with
or without 64bit kernel/userland)? Obviously there is no i386 efi loader
currently so neither is possible...

--
John Baldwin

Lundberg, Johannes

2016-03-02 01:45:04 UTC

CherryTrail devices/boards with 64bit UEFI are already out. Upgrading the
hardware is one solution (I did).

I never did try FreeBSD on BayTrail but for running Linux on BayTrail I
used special built Grub that was 32bit but could load 64bit OS. Could this
kind of Grub boot a 64bit FreeBSD, I wonder?

Post by John Baldwin

I don't think anyone is actively working on it. I think it shouldn't be
that much work once the i386 loader is resurrected. The i386 kernel just
needs to use the EFI memory map and I think the rest of it should generally
just work.
--
John Baldwin
_______________________________________________
https://lists.freebsd.org/mailman/listinfo/freebsd-current

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Joe Holden

2016-03-02 10:10:11 UTC

Post by Lundberg, Johannes
CherryTrail devices/boards with 64bit UEFI are already out. Upgrading
the hardware is one solution (I did).

I'm thinking of the sticks etc, they all have 32bit UEFI and no
CSM/legacy boot, but have 64bit cpus

Post by Lundberg, Johannes
I never did try FreeBSD on BayTrail but for running Linux on BayTrail I
used special built Grub that was 32bit but could load 64bit OS. Could
this kind of Grub boot a 64bit FreeBSD, I wonder?

I looked at this but honestly it looked like a giant nightmare - I did
get grub loading on a test platform (tablet, for display etc) but didn't
manage to make it boot anything

I don't think anyone is actively working on it. I think it shouldn't be
that much work once the i386 loader is resurrected. The i386 kernel just
needs to use the EFI memory map and I think the rest of it should generally
just work.
--
John Baldwin
_______________________________________________
mailing list
https://lists.freebsd.org/mailman/listinfo/freebsd-current
To unsubscribe, send any mail to

Lundberg, Johannes

2016-03-02 19:00:35 UTC

Post by Lundberg, Johannes
CherryTrail devices/boards with 64bit UEFI are already out. Upgrading
the hardware is one solution (I did).
I'm thinking of the sticks etc, they all have 32bit UEFI and no

CSM/legacy boot, but have 64bit cpus

Yeah and it sucks. All to adapt to Microsoft who couldn't make 64bit UEFI
boot loader in time (or so I heard)...
I heard though that newer (Linux) versions of Intel Compute Stick would
have 64bit UEFI but I'm not sure.

Post by Joe Holden
I never did try FreeBSD on BayTrail but for running Linux on BayTrail I

Post by Lundberg, Johannes
used special built Grub that was 32bit but could load 64bit OS. Could
this kind of Grub boot a 64bit FreeBSD, I wonder?
I looked at this but honestly it looked like a giant nightmare - I did

get grub loading on a test platform (tablet, for display etc) but didn't
manage to make it boot anything

This page contains some instructions and a downloadable booti32.efi image
that you can put in the EFI folder. That will boot a 64bit grub that should
be able to boot a 64bit OS.

http://liliputing.com/2013/10/booting-ubuntu-asus-transformer-book-t100.html

I do have customized Arch Linux memstick image with Grub and this
booti32.efi image so it boots on these systems. This can be used to install
a Grub bootloader that maybe can boot FreeBSD.

One question is, would Grub's filesystem drivers for FreeBSD work in this
mode?

Maybe I should give it a shot today..

Post by Joe Holden
Hi all,
Apologies if this is the wrong list...
Is there any plan to support booting FreeBSD on 32bit UEFI systems

(with

Post by Joe Holden
or without 64bit kernel/userland)? Obviously there is no i386 efi

loader

Post by Joe Holden
currently so neither is possible...

I don't think anyone is actively working on it. I think it shouldn't be
that much work once the i386 loader is resurrected. The i386 kernel just
needs to use the EFI memory map and I think the rest of it should generally
just work.
--
John Baldwin
_______________________________________________
mailing list
https://lists.freebsd.org/mailman/listinfo/freebsd-current
To unsubscribe, send any mail to

Lundberg, Johannes

2016-03-02 19:45:41 UTC

CSM/legacy boot, but have 64bit cpus

Yeah and it sucks. All to adapt to Microsoft who couldn't make 64bit UEFI
boot loader in time (or so I heard)... I heard though that newer (Linux)
versions of Intel Compute Stick would have 64bit UEFI but I'm not sure.

The Intel Compute sticks can boot both 32 and 64 bit. It doesn't matter if
you have the Windows or Linux version. (The difference between the is the
amount of RAM and onboard storage, the firmware is the same)
I have the Windows one and it boots 64 bit just fine.
You can select it in the settings. (OS setting: Windows=32 bit, Linux=64
bit)

That's great. However, as for all other BayTrail devices out there that
does not support Linux officially I think you're stuck with 32bit.

Jakob

Joe Holden

2016-03-02 22:18:09 UTC

CSM/legacy boot, but have 64bit cpus

Yeah and it sucks. All to adapt to Microsoft who couldn't make 64bit UEFI
boot loader in time (or so I heard)... I heard though that newer (Linux)
versions of Intel Compute Stick would have 64bit UEFI but I'm not sure.

My point was that it is possible to boot amd64 bit kernels from 32bit
UEFI, grub (and therefore, linux) does it.
I think even openbsd at least has a 32bit loader, I'd settle for 32bit
but the problem is I can't easily boot it.

John Baldwin

2016-03-02 17:02:34 UTC