On 04/03/26 20:08, Ryan Eatmon wrote:
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.
I see. So we want to move the structure to something which tries to load
any .cpio.xz present?
Other question, how do we tell other users to include the TPS6594
module(to put it in a better way include the packagegroup for intramfs)
while building their own initramfs(specifically for AM62a), is linux
release doc the right place to do so?
Regards,
Moteen
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
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