Concerto F28M35X DSP side external memory

Hi Expert,

We are doing some FFTs with the F28M35X using single precision floating point. The problem is, the F28M35X only has limited internal RAM (100KB) to calculate up to a 8192 point FFT.. 100KB equals 25K float data, which is not good for several FFT calculations.

I know that from M3 side, F28M35X can add external memory. But DSP side can't direct access that part of memory. With the M3 DMA transferring blocks of data between EPI and Shared RAM will deeply effect the FFT performance.

Does TI has any solution /roadmap for external memory for DSP side?