Pass Kernel argument on boot?

[copper]

hi team

How can i pass or modify the boot arguments to the CM#588 nas kit on offical images?
the current output from /proc/cmdline is

storagemedia=emmc androidboot.storagemedia=emmc androidboot.mode=normal androidboot.dtbo_idx=0 androidboot.verifiedbootstate=orange earlycon=uart8250,mmio32,0xfeb50000 console=ttyFIQ0 coherent_pool=1m irqchip.gicv3_pseudo_nmi=0 rw root=/dev/mmcblk2p8 rootfstype=ext4 rootflags=discard data=/dev/mmcblk2p9 consoleblank=0 cgroup_enable=cpuset cgroup_memory=1 cgroup_enable=memory swapaccount=1 androidboot.fwver=ddr-v1.16-9fffbe1e78,bl31-v1.45,bl32-v1.15,uboot-1b1171b7c7-04/18/2024

I want to be able to modify and add some parameters.
e.g.
cma=256M
coherent_pool=4M

How can i do that?

[aspectincome]

Hi, are you using the official Debian image with U-Boot from FriendlyELEC, or a custom build?
Also, have you checked whether these parameters are coming from bootargs in U-Boot or from the DTB?

[copper]

Hi, are you using the official Debian image with U-Boot from FriendlyELEC, or a custom build?
Also, have you checked whether these parameters are coming from bootargs in U-Boot or from the DTB?

I am using the official images that was supplied. I believe it is running bookworm.

How do I check how the arguments are supplied?