bringup on RK3399

[Michael Grunditz]

On Sun, 8 Nov 2020 at 00:32, Michael Grunditz
<michael.grunditz at gmail.com> wrote:
>
> On Sat, 7 Nov 2020 at 15:57, Michael Grunditz
> <michael.grunditz at gmail.com> wrote:
> >
> > >> snip
> > I am facing below:
> >
> > Error: Assertion failed: id < _count && _cpus[id].constructed()
> > Error:   File: /home/micken/genode/repos/base-hw//src/core/kernel/cpu.cc:198
> > Error:   Function: Kernel::Cpu& Kernel::Cpu_pool::cpu(unsigned int)
> > The call that gets me there originates from core/kernel. I have
> > configured one cpu , so id is always 0. The construct function is
> > called prior to this, but the util method doesn't return * I THINK * .
> >
> > Any thoughts?
>
>
> After a lot of headache I found this:
>
> This functioncall does not return:
>
>  _cpus[id].construct(id, _global_work_list);
>
> A exception was generated and resulted in a call to kernel() when no
> cpu's where configured. Possible case for exception is changing in EL,
> starting cpus (psci), I hope/think that uboot handles it.. but need to
> investigate more.
> Booting from uImage fails, at first right before starting and
> decompressing, then after applied patch from imx8q , goes to "no atag
> builtin...etc". I removed that hang()... uboot bails out on
> decompression . I disabled compression and can now see exception
> directly after "starting kernel" ESR is  image entry/load.
>
> Which EL is best to start with? when testing with running genode with
> 'go' things worked quite well. With bootm it can switch to EL1.
>
> I hacked in EL1 into 'go'
> Result: same issue.. get exception calls kernel().. probably
> exception from mmu init.
> What are the  requirement for RAM , in terms of start and size? Should
> it include the Genode image?
>
> OK I think I got most in this mail.. been writing on it all day! :-)
>
> Btw if someone want to chat .. I am on irc
.
Just want to confirm that I found the place of crash:

cpus[id].construct(id, _global_work_list);  , just as I thought from
start. I changed exception return to B .
>From that I could narrow it down.

Thanks for reading!