How logs will come to UART serial console?

[sandeep kumar]

Hi ,
Here is my question.
when we put 'printk's in kernel code the logs will go to the log_buffer.(i
observed that from implementation)
But when UART is enabled(in the bootloader), the same printk logs are going
to the serial console.
 As per my study printk doesnot implementing anything that writes to the
UART console.

Now here are my questions,
how this is being achieved? Where this is implemented?(which file)

Where wil be the parsing of the cmdline string sent from the bootloader is
done?


Thanking you,
sandeep kumar.
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