Setting up boot chain ACPI on ARM with STM32MPU

[Ba Gia Bao Phan]

Hi,
>
> Overall I think it's a worthwhile endeavour to get this sorted for at
> least one ARM platform as a starting point.

So, do you know are there any ARM platforms having ACPI enabled?


Le mer. 29 nov. 2023 à 20:45, Moritz Fischer <moritzf at google.com> a écrit :

> Hi,
>
> On Wed, Nov 29, 2023 at 11:28 AM Simon Glass <sjg at chromium.org> wrote:
> >
> > +Heinrich Schuchardt
> >
> > Hi,
> >
> > On Wed, 29 Nov 2023 at 08:29, Ba Gia Bao Phan
> > <phanbagiabao2001 at gmail.com> wrote:
> > >
> > > Hello everyone,
> > >
> > > I am a trainee at STMicroelectronics France. I am working on a project
> "Setting up a boot chain ACPI" for STM32MPU, which is based on ARM Cortex-A
> . The objective of my project is to add a way of booting (with ACPI)
> besides Device Tree available on STM32MPU.
> > >
> > > I found that ACPI was enabled on some x86 platforms but I don't know
> whether it was set up on ARM or not. I found a PATCH that discussed
> Enabling ACPI booting on ARM with Raspberry Pi 4 but I don't know if it
> functioned or not. Did anyone here succeed in setting up ACPI on ARM by
> U-boot?
> >
> > Sort-of...the refactoring to allow ACPI tables on ARM is completed,
> > but I don't think any U-Boot board uses this.
> >
> > >
> > > What are the differences between x86 and ARM platforms when enabling
> ACPI? The architecture of my board STM32PMU is ARM so can I apply the
> technique used on platform x86 for my board?
> >
> > Firstly I wonder why you want ACPI?
>
> I think STM32MPU is as good as any platform to get the pipe flushed
> with enabling ACPI on ARM platforms.
>
> Overall I think it's a worthwhile endeavour to get this sorted for at
> least one ARM platform as a starting point.
>
> > Secondly, if you have the tables somewhere it should be easy enough to
> > build them, building on the series you pointed to. Heinrich is
> > interested in this, I think. I can help with advice. I have been
> > toying with going back to that rpi series but have not done so yet.
>
> I've started to mess around with this over the holidays. Feel free to
> CC me on future work in that direction.
>
> - Moritz
>


-- 
PHAN Ba Gia Bao
Etudiant en 5A STI - INSA Centre Val de Loire