The size of the L1 Memory is the same (5Mbits) in both SHARC+ core of ADSP-SC589 and SHARC Core in ADSP-214xx.
But the address mapping of L1 Memory Block0 and Block1 is different between the SHARC+ and the SHARC Core
Note that SHARC+ Core L1 Memory has Byte word alias (In total SHARC+ Core has 5 different alias in the L1 Memory private space) and a System space alias . Refer to product specific datasheet for complete details.