A list of parameters can be passed to a kernel to change it's behavior at run time. To find out what your current command line is/was:
root:/> cat /proc/cmdline root=/dev/mtdblock0 rw clkin_hz=25000000 earlyprintk=serial,uart0,57600 console=ttyBF0,57600
This is an ascii string, which is normally managed from the bootloader's bootargs. It is the bootloader's responsibility to copy it to a specified place, right before the kernel boots (see the Blackfin ABI page for more information).
This is copied in the linux kernel:
Everything that can be set from the command line is specified in the kernel-parameters.txt
file, which can be found as part of the kernel's Documentation.
file: Documentation/kernel-parameters.txt
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The default bootargs are set by the Bootloader's board config file.
file: include/configs/bfin_adi_common.h
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