Genode on i.MX6 (eMMC Flash)

[Kranthi Tej]

Hello Stefan,

Thank you for the quick response.

>
> I'm sure it has nothing to do with the load instruction and its usage,
> but for instance with missing physical backing store, e.g., by wrong RAM
> specifications, that is going to be loaded.
>
> I have taken our i.MX6Q SABRE SD out of the cabinet and tested it by
> building `run/log` and `run/affinity` for the Wandboard with the minor
> patch below [1].
> Both run-scripts worked without further modifications beside the lesser
> RAM specification on top of Genode's master and staging branches.
>

We have been using the `run/log` and `run/demo` images.

I do not know what code-base you are using, but please try the patch
> below on top of Genode's current master branch to build the "log" image,
> and verify whether this works for you.
>

I'm currently using the Genode 17.02 master branch as my code-base. I've
taken it from https://github.com/genodelabs/genode.


> [1] Patch:
>
> diff --git a/repos/base/include/spec/imx6/drivers/board_base.h
> b/repos/base/include/spec/imx6/drivers/board_base.h
> index 2d161f4..3600d6d 100644
> --- a/repos/base/include/spec/imx6/drivers/board_base.h
> +++ b/repos/base/include/spec/imx6/drivers/board_base.h
> @@ -30,7 +30,7 @@ struct Genode::Board_base
>         enum {
>                 /* normal RAM */
>                 RAM0_BASE = 0x10000000,
> -               RAM0_SIZE = 0x80000000,
> +               RAM0_SIZE = 0x40000000,
>
>                 /* device IO memory */
>                 MMIO_BASE = 0x00000000,
>
>
We've already made this change. We are currently using this setting itself.
Besides, making this change, we've changed the NR_OF_CPUS to 1 in [1]. If
we let the default value of 4 be set, the device hangs at "Starting kernel
..." stage itself. We also tried setting the RAM0_SIZE to 0x20000000. Our
board has a physical RAM of 1 GB.

We have been facing the same pagefault for both the images (demo and log).
The core isn't being started. Please provide any pointers to resolve this
problem.

Thanks in advance,
Kranthi

[1] repos/base-hw/lib/mk/spec/imx6/*.mk
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