U-boot cmdline: Difference between revisions
From embeddedTS Manuals
(Created page with "The Linux kernel cmdline can be customized by modifying the cmdline_append variable. Keeping the default options here is recommended, but additional arguments can be appended...") |
No edit summary |
||
| Line 1: | Line 1: | ||
The Linux kernel cmdline can be customized by modifying the cmdline_append variable. Keeping the default options here is recommended, but additional arguments can be appended to this variable. | The Linux kernel cmdline can be customized by modifying the cmdline_append variable. Keeping the default options here is recommended, but additional arguments can be appended to this variable. | ||
<source lang=bash> | <source lang=bash> | ||
env set cmdline_append console=ttymxc0,115200 init=/sbin/init | env set cmdline_append console=ttymxc0,115200 init=/sbin/init quiet | ||
env save | env save | ||
</source> | </source> | ||
You can also change the kernel command line from the onboard Linux. From the board's shell prompt run: | |||
<source lang=bash> | |||
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 | |||
</source> | |||
The boot.scr includes the plaintext commands to be run in u-boot on startup, and mkimage adds a checksum and header to this file which can be loaded by u-boot. The ub file should not be manually modified. | |||
Revision as of 11:47, 15 December 2016
The Linux kernel cmdline can be customized by modifying the cmdline_append variable. Keeping the default options here is recommended, but additional arguments can be appended to this variable.
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 plaintext commands to be run in u-boot on startup, and mkimage adds a checksum and header to this file which can be loaded by u-boot. The ub file should not be manually modified.