Re: [meta-arago] [PATCH] tisdk-uenv: Add instructions to load initramfs while booting linux

On 3/3/26 4:49 AM, Moteen Shah via lists.yoctoproject.org wrote:
> Add instructions to load initramfs image and update the boot command
> to use the image to boot the linux kernel.
> 
> Signed-off-by: Moteen Shah <[email protected]>
> ---
>   .../recipes-tisdk/tisdk-uenv/tisdk-uenv/uEnv.txt  | 15 +++++++++++++++
>   1 file changed, 15 insertions(+)
> 
> diff --git a/meta-arago-distro/recipes-tisdk/tisdk-uenv/tisdk-uenv/uEnv.txt b/meta-arago-distro/recipes-tisdk/tisdk-uenv/tisdk-uenv/uEnv.txt
> index 0af0eef3..5ac61b34 100644
> --- a/meta-arago-distro/recipes-tisdk/tisdk-uenv/tisdk-uenv/uEnv.txt
> +++ b/meta-arago-distro/recipes-tisdk/tisdk-uenv/tisdk-uenv/uEnv.txt
> @@ -7,3 +7,18 @@
>   #       default on all newer U-Boot images.  This also means that some
>   #       variables such as bootdelay cannot be changed by this file since
>   #       it is not evaluated until the bootcmd is run.
> +
> +# Initramfs configuration
> +# Name of the initramfs file in the boot partition
> +name_initramfs=ti-core-initramfs.cpio.xz
> +
> +# Command to load initramfs from boot partition (mmc device:partition)
> +# Adjust the device number (0 or 1) based on your setup
> +# mmcdev is set to 1 by default, partition 1 is the boot partition
> +get_initramfs_mmc=fatload mmc ${mmcdev}:1 ${rdaddr} ${name_initramfs}
> +

This belongs in u-boot default env, it is basically the same as `get_fdt_mmc`
and other helpers already there.

> +# Load initramfs and set up variables
> +load_initramfs=if run get_initramfs_mmc; then setenv _initramfs ${rdaddr}:${filesize}; setenv rd_spec ${_initramfs}; echo Initramfs loaded at ${rdaddr}, size ${filesize}; else echo WARNING: Initramfs not found, continuing without initramfs; setenv rd_spec -; fi
> +

This should be part of `mmcloados` in u-boot also.

> +# Custom boot command that loads initramfs before kernel
> +init_mmc=run args_all args_mmc load_initramfs

With the above added, you don't need to override `init_mmc` so
this line goes away too.

That leaves one line left, `name_initramfs`. How about just
setting a sane default name in u-boot. We got away with something
like this for K2 plats:

https://github.com/u-boot/u-boot/blob/master/board/ti/ks2_evm/k2e_evm.env#L12

although I'd recommend a more generic filename.

Andrew

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