Setting up boot chain ACPI on ARM with STM32MPU

[Simon Glass]

Hi Ba,

On Mon, Dec 4, 2023 at 2:47 AM Ba Gia Bao Phan
<phanbagiabao2001 at gmail.com> wrote:
>>
>> Sort-of...the refactoring to allow ACPI tables on ARM is completed,
>> but I don't think any U-Boot board uses this.
>
> Hello, could you tell me more details about this topic? Which platform ARM are ACPI tables enabled for?

There are some patches to enable it for qemu on ARM here:

http://patchwork.ozlabs.org/project/uboot/list/?series=388154

Regards,
Simon


>
> Le mer. 29 nov. 2023 à 20:28, Simon Glass <sjg at chromium.org> a écrit :
>>
>> +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?
>>
>> 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.
>>
>> Regards,
>> Simon
>
>
>
> --
> PHAN Ba Gia Bao
> Etudiant en 5A STI - INSA Centre Val de Loire