How to load and run kernel from sdram

The printable version is no longer supported and may have rendering errors. Please update your browser bookmarks and please use the default browser print function instead.

When testing a new kernel configuration, it can be helpful to not always save the kernel to flash; instead simply load and run from SDRAM. You can do this manually by entering the u-boot commands shown below.

Configuring the kernel

Using a RidgeRun SDK, you can configure the kernel via

make -C $DEVDIR config

which launches the SDK configuration tool. Select kernel from the main menu and adjust the kernel settings as needed.

Building the kernel image

Using a RidgeRun SDK, you can build the new kernel image via

make -C $DEVDIR kernel

This will automatically copy the new kernel image to /srv/tftp on your desktop computer. You can see the file name being used

ls -ltr /srv/tftp

The filename will be something like kernel.uImage.tfischer.overo.

Configuring uboot to auto-load / auto-boot using tftp

Adjust the follow u-boot commands to match your host computer IP address and /srv/tftp kernel filename.

setenv autoload no
dhcp
setenv autorun no
tftp