[U-Boot] [PATCH v4 00/19] sunxi: sync H3, H5, A64 DTs from mainline Linux

[André Przywara]

On 02/04/18 13:47, Mark Kettenis wrote:

Hi,

>> From: =?UTF-8?Q?Andr=c3=a9_Przywara?= <andre.przywara at arm.com>
>> Date: Mon, 2 Apr 2018 12:51:50 +0100
>>
>> On 02/04/18 12:20, Mark Kettenis wrote:
>>
>> ....
>>
>>>> This feature make U-Boot to have full Linux dts inside, Can't we
>>>> implement automatic-boot-of-os distro to grab Linux dtb during
>>>> commands stage like other distro does? Because this make few
>>>> development struggles for U-Boot project like (few of the comments are
>>>> repeated from previous mail, but I'm trying to group them all)
>>>> - Unnecessary to maintain nodes which are not required for bootloader
>>>> and which doesn't have proper dt drivers.
>>>> - It becomes more patches for each-and-every sync.
>>>> - We can compare the sync with Linux dt and simply apply on U-Boot
>>>> which look not good to project growing.
>>>> - Increase size(though it 10KB increase) it becomes unnecessary size
>>>> from U-Boot point-of-view
>>>
>>> This is not just about booting Linux.  And even if it was, it means
>>> that you can only boot on hardware for which a full device tree is
>>> included in your distro.  So a new board that comes with a usable
>>> U-Boot in SPI flash still won't work since the right device tree isn't
>>> there.
>>
>> Ah right, I didn't even mention SPI flash in that thread. Thanks!
>>
>> Out of curiosity: what OS are you thinking about? Collecting trophies
>> here ;-) I tried the FreeBSD-current installer the other day, and it
>> worked pretty well.
> 
> OpenBSD.  ARMv8-wise, our support for Allwinner A64/H5 and Rockchip
> RK3399 is pretty decent these days and Rockchip RK3328 is coming along
> as well.

Ah, great! I didn't know that OpenBSD was that far.
Do you know of anything missing in the DT or UEFI support from mainline
U-Boot? I put firmware images on my Pine64 github repo[1] for A64 and H5
boards, which are based on 2018.03 plus this series, if you want to give
it a try.
Trying to wrap my around INSTALL.arm64, but you might be faster ;-)
Does 6.2 provide enough to work? Or shall I wait till the 15th?

>  And I'm working on Marvell 8040 support.  There is support
> for ARMv7 as well which includes many of the older Allwinner SoCs.
> We don't have the resources to build images for all the different
> boards that are out there though, which probably is the biggest
> stumbling block for getting OpenBSD to run.  Our bootloader is UEFI,

That sounds good!

> so with a recent enough U-Boot in flash the default install.fs image

Is that the FFS filesystem in the OpenBSD partition of miniroot.fs?
Which just contains the bsd.rd kernel + RAM fs?
The 6.2 directory didn't have an explicit install.fs image.

Cheers,
Andre

[1] https://github.com/apritzel/pine64/tree/master/images

> should just work.  It does on Rock64!  Otherwise you have to know the
> magic to write the U-Boot image at the right location into that image
> to make it boot.
> 
> Cheers,
> 
> Mark
>