PowerPC64LE bringup notes

[Alfredo Dal'Ava Júnior]

This is an awesome job, Brandon! Thank you for letting us know.
I hope to be able to help stabilize it.

[]'s
Alfredo

On Sun, Aug 23, 2020 at 2:12 AM Brandon Bergren <bdragon at freebsd.org> wrote:

> For anyone who hasn't been watching my progress in IRC:
>
> Over the last couple weekends, I have been working on experimentally
> bringing up a PowerPC64 Little Endian kernel and userland for the first
> time.
>
> Last weekend, I succeeded in booting into multiuser in qemu pseries (via a
> somewhat convoluted boot procedure, as pseries makes bad assumptions about
> kernel entry points.)
>
> This evening, I accomplished the same on a Blackbird, after having spent
> some time during the week making progress on qemu powernv.
>
> My work tree is at https://github.com/bdragon28/freebsd/tree/little-endian
> -- I will be tidying things up and getting pieces of it committed to SVN
> relatively soon.
>
> For the forseeable future, BE will still be the preferred platform for
> FreeBSD PowerPC64, as it's a heck of a lot more comfortable to debug in.
>
> I don't have install media yet for people to experiment with. (I have
> stand/ disabled at the moment and make release depends on it, so all I have
> are sets, kernels, and a cobbled-together LE rootdisk.)
>
> Additionally, I still need to get the tests for
> https://reviews.llvm.org/D73425 written so I can get the target addition
> accepted into LLVM.
>
> While I can boot multiuser and the compiler works, there appear to be some
> lingering issues with floating point math that I have not gotten around to
> debugging yet, which has some odd effects like making top hang.
>
> dmesg @ https://dmesgd.nycbug.org/index.cgi?do=view&id=5636
>
> --
>   Brandon Bergren
>   bdragon at FreeBSD.org
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