Hi Ahmad
On Thu, 15 Feb 2024 at 14:47, Ahmad Fatoum <a.fatoum@xxxxxxxxxxxxxx> wrote:
>
> Hi Lars,
>
> On 15.02.24 14:01, Lars Pedersen wrote:
> > Hi.
> >
> > I'm trying to create a barebox environment by using af emmc a raw
> > partition offset on the beaglebone black.
> >
> > For testing I appended the following into am33x-boneblack.dts.
> >
> > / {
> > chosen {
> > environment {
> > compatible = "barebox,environment";
> > device-path = &environment_emmc;
> > };
> > };
> >
> > aliases {
> > state = &state_emmc;
> > };
> >
> > state_emmc: state {
>
> [snip]
>
> Keep in mind that state is unrelated to environment:
>
> - state: power-fail safe set of predefined variables used for mostly bootstate
> - environment: where you would keep scripts, variables and resources.
> In the field, you'd probably only use the immutable barebox built-in environment
> (+ state), but for development, the mutable environment is very handy.
>
> > state: New state registered 'state'
> > state state.of: Fresh state detected, continuing with defaults
>
> State looks ok.
>
> > environment load /mnt/mmc1.0/barebox.env: No such file or directory
> > Maybe you have to create the partition.
> > changing USB current limit to 1300 mA... done
> >
> > Hit m for menu or any to stop autoboot: 1
> > ---------------------------------------------------
> >
> > Why does it try to read the env on a partition on
> > /mnt/mmc1.0/barebox.env? Is it because barebox.bin also is read from
> > this partition?
>
> Check out omap_env_init(), which registers the environment if system boots from
> SD/MMC. This seems to take precedence over what's in the device tree. Indeed,
> upstream AM335x platforms only configure an environment in the DT if it's outside
> SD, on NAND or NOR.
>
> I think placing the environment on the FAT makes sense as the MLO is there as well.
> Why would you like to move it?
I'll check out the omap_env_init. I just trying to understand how it
was set, so I don't want to change anything :)
Thanks for the quick response.
/Lars
>
> Cheers,
> Ahmad
>
> >
> > Thanks.
> >
> > /Lars
> >
> >
>
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