[PATCH 1/1] Added arm64 assembly for examples/api crt0

[Ilias Apalodimas]

Hi Jiaxun

On Sat, 25 May 2024 at 19:21, Jiaxun Yang <jiaxun.yang at flygoat.com> wrote:
>
>
>
> 在2024年5月21日五月 下午7:15，Tom Rini写道：
> [...]
> >
> > We have long not done a great job with the U-Boot standalone API stuff,
> > and for a number of years at this point a lot of the use cases it was
> > used for could instead be filled by making an EFI application. There's a
> > well defined API there, there's lots of examples, and frankly for the
> > license related questions, makes a much nicer answer.
>
> Hi Tom + U-Boot EFI folks,
>
> Sorry for chime in here.
>
> AFAIK there are quite a lot of users of U-Boot API in MIPS world, mostly for
> Bare mental applications to perform chip diagnostic or programming stuff.
>
> But I'd agree that there is no benefit to maintain ABI stuff in upstream
> for long run.
>
> However, I think people still need an API-like interface for those simple
> applications, while many architectures are not supported by U-Boot EFI for
> now.
>
> Sadly, most architectures are not covered by UEFI spec, some of them are
> violating fundamental assumptions of UEFI spec, like no 1:1 PA VA mapping
> or simply being Big Endian.
>
> Do you think it's a good idea to port EFI support to as many architectures
> as possible, and produce U-Boot supplements to UEFI spec to cover those
> details? I'm happy to look into it.

I personally think U-Boot is a nice alternative to EDK2 for smaller
devices (and doesn't have to rely on the PI spec as well).
The EFI spec does have some architecture specific wording for the
supported platforms, so I would guess adding more would be possible.
But I haven't checked the extent of changes that are going to be
needed.

In any case, I am happy to help

Cheers
/Ilias
>
> Thanks
>
> >
> > That there's some power users out there making use of standalone to do
> > useful things is news to me. Some of them speaking up and offering to
> > be visible in maintaining it would be good (there's Coverity issues and
> > lack of CI testing, which should be addressed).
> >
> > --
> > Tom
> >
> > 附件:
> > * signature.asc
>
> --
> - Jiaxun