How does CCS compiler calculate the Stack size and list in .map file

Hi All :

I am now trying to estimate  total stack size used of my project on 28035

The .map file shows information as below:

     name                    origin           length            used         unused     attr     fill

RAML0_2               000084c0   00000340  00000300  00000040  RWIX

But I don't know how does the CCS compiler calculate the result  "0x300"

Is there any document describe how it works?

Thanks!