u-boot -kernel- application-how it links(the very basic)
 

I have to test a system.
The system to be tested has a bootloader which executes a diagnostics and logging the results to kernel.The application is able to enquire the results to kernel


1.How can i verify if the kernel is logging the results?
2.also how to verify the ability of appplication to enquire to kernel The diaganostics is a general one in embedded systems inlcluding flash,sram ,ethernet etc?



3.shall i get any good tutorial to understand the link between u-boot -kernel- application-



Very many thanks in advance

*
add 1) Probably in the log file
..... /var/log/messages/ or /var/log/kernel/

add 3) http://www.denx.de/wiki/DULG/UBootStandalone
...... http://www.denx.de/wiki/DULG/Manual
...... http://www.denx.de/wiki/view/DULG/NoConsoleOutput

Or Google .. u-boot -kernel- application ..
....