How to deal with the IAR keyword “ __data20” in CCS?

Hi,

 I'm building a IAR project in CCS. There are many keyword “ __data20” in the C source code does not recognize by  the compiler.

For example：

_{unsigned char __data20 *addr = baseTempAddr + (RowA * BYTES_PER_LINE);}

 I noticed that in IAR compiler Options,the keyword can be set to “DATA” in item “Override segment base name”.I would like to ask, what is the correct processing method in CCS?  How to migration the “ __data20” to CCS C?

Thanks,

Tang Meng