Radxa rock-pi-3a

[Richard Kojedzinszky]

Hi Kever,

Thanks for your reply! I greatly appreciate your work, really. 
Additionally, can you please provide me sources of documentations, on 
which you base your work? I am totally blind in this area, and I would 
be interested in reading such kind of documentation of the SoCs.

Many thanks,
Richard

2022-04-09 04:28 időpontban Kever Yang ezt írta:
> Hi Richard,
> 
>     The ATAGs to pass the parameters is not available on the mainline
> U-Boot, and only use os_regs for the ram size for now, it do have the
> limitation for max 4GB now.
> 
>     There is a fix for this  on the list, you can try it:
> 
> https://patchwork.ozlabs.org/project/uboot/patch/20220222013131.3114990-12-pgwipeout@gmail.com/
> 
> 
> 
> Thanks,
> 
> - Kever
> 
> On 2022/4/8 15:44, Richard Kojedzinszky wrote:
>> Dear community,
>> 
>> I own a rock-pi-3a board with 8G ram. Right now, radxa's u-boot is 
>> capable of detecting the whole amount during boot. Upstream u-boot 
>> shows 1G of dram installed.
>> 
>> I've started with evb-rk3568_defconfig.
>> 
>> What I would like to achieve is that u-boot load grub-efi, to finally 
>> boot the operating system. Howewer, with radxa uboot, and using 
>> grub-efi, the kernel sees 4G only. If I boot the kernel image directly 
>> from radxa u-boot, the whole 8G is visible. I assume that efi is 
>> broken somehow, as I get multiple warnings from kernel regarding EFI 
>> firmware.
>> 
>> 
>> Reading radxa's u-boot, it seems that it uses ATAGs do detect memory 
>> size. Am I in the right way?
>> 
>> Would it be beneficial to port some of that code to upstream u-boot, 
>> or are there other solutions to detect correct memory size?
>> 
>> 
>> Thanks in advance,
>> Richard