On 3/4/2026 12:32 AM, Moteen Shah wrote:
On 03/03/26 22:49, Andrew Davis wrote:
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.
mmcloados is only used by 'mmcboot' which is a differnt boot command
other than bootcmd_ti_mmc?
We can consider adding the load_initramfs to 'get_kern_mmc' and we wont
need to override the init_mmc with the change.
+# 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:
We don't expect the name of the cpio to be variable, as the name of the
cpio stays the same for all K3 platforms which is
"ti-core-initramfs.cpio.xz", I can remove the variable altogether maybe
and directly use the image name to load. Thoughts?
That is a very Yocto centric take. But we also support armbian and
other distros. They may not want to name the file the same way we chose
in meta-ti. The question is, should we paint ourselves into a corner
from the beginning or allow for some flexibility?
Plus, even in Yocto, a user could choose to not use ti-core-initramfs
and instead make their own with their own name. Making this more
flexible feels more friendly in the long run.
Just my two cents.
Regards,
Moteen
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
\ No newline at end of file
--
Ryan Eatmon [email protected]
-----------------------------------------
Texas Instruments, Inc. - LCPD - MGTS
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