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→Target setup and first boot
Once power has been applied to the target, U-Boot bootloader will be fetched from the SPI NOR flash and executed. Boot messages will be printed out on to the serial console. Redundant U-Boot environment is stored in the NOR flash as well, as depicted in the following image.
By default, U-Boot is configured to retrieve Linux kernel image stored in the microSD card [1]. In turn, Linux kernel shall mount root file system from the <code>mmcblk0p2</code> partition of the [[#XUELK microSD Layout|microSD card itself]]. At the end of boot process, Linux shell shall be available on the serial console.
The following dump shows the typical messages printed out to the console during bootstrap process.
<pre class="mw-collapsible mw-collapsed">
U-Boot 2015.04 (Mar 31 2016 - 23:22:16)-xuelk-0.9.0