TMS320F2800157: What is this pre-defined name CPU1 used for?

Part Number: TMS320F2800157
Other Parts Discussed in Thread: C2000WARE

Tool/software:

Hi champs,

I am asking this for our customer.

What is this pre-defined name CPU1 used for in TI C2000ware V5.04 example codes?

It seems not used explicitly...