the meaning of the defined memory in omapl138evm

Hello.

In the omapl38 DVSDK ,the ../dsplink/config/all/CFG_OMAPL138GEM_SHEM.c -file has defined the memory used by DSP.

now ,i wanta know the meaning or usage of each memory.  IN the LINKCFG_memTabl_00 [ ] :          eg.DDR and DSPLINKMEM and POOLMEM.

in my view ,the DDR is the DSP's memory used for storing an excuting  [ DSP.out ] . AM i right?

if i'm right ,what the remain is used for ?

thanks.

ck