U-boot cmdline: Difference between revisions
From embeddedTS Manuals
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The Linux kernel cmdline can be customized by modifying the cmdline_append variable. | The Linux kernel cmdline can be customized by modifying the cmdline_append variable. If new arguments are added the existing value should also be included. | ||
<source lang=bash> | <source lang=bash> | ||
env set cmdline_append console=ttymxc0,115200 init=/sbin/init quiet | env set cmdline_append console=ttymxc0,115200 init=/sbin/init quiet | ||
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mkimage -A arm -T script -C none -n 'tsimx6 boot script' -d /boot/boot.scr /boot/boot.ub | mkimage -A arm -T script -C none -n 'tsimx6 boot script' -d /boot/boot.scr /boot/boot.ub | ||
</source> | </source> | ||
The boot.scr includes the | The boot.scr includes the plain text commands to be run in u-boot on startup. The mkimage tool adds a checksum and header to this file which can be loaded by u-boot. The ub file should not be edited directly. | ||
Revision as of 13:20, 10 February 2017
The Linux kernel cmdline can be customized by modifying the cmdline_append variable. If new arguments are added the existing value should also be included.
env set cmdline_append console=ttymxc0,115200 init=/sbin/init quiet
env save
You can also change the kernel command line from the onboard Linux. From the board's shell prompt run:
apt-get update && apt-get install u-boot-tools -y
echo "env set cmdline_append console=ttymxc0,115200 init=/sbin/init quiet" > /boot/boot.scr
mkimage -A arm -T script -C none -n 'tsimx6 boot script' -d /boot/boot.scr /boot/boot.ub
The boot.scr includes the plain text commands to be run in u-boot on startup. The mkimage tool adds a checksum and header to this file which can be loaded by u-boot. The ub file should not be edited directly.