how can i use the founction of search in ccs12

My device is TMDSEVM6678L.

When i learn the example of   "helloWorld "  in  "mcsdk_2_01_02_06\examples\ndk".

I want to know the definition of  "BIOS_module" .

I use the search button in the ccs12，but i can't find the "BIOS_module" .

It must my misuse.

How can i find the variable of "BIOS_module" ?

thanks.