About adsp-21584 sport dma data memory

Hi , 

I am testing the audio port SPORT of ADSP21584 on my board. I use sport0A as receiver, enable DMA0, TDM16 channel.
When I finish configuring DMA, enable DMA. The DMA0_ADDRSTART register address will automatically change.


I submitted the same question about SPI DMA before,

https://ez.analog.com/dsp/sharc-processors/f/q-a/548304/i-need-help-about-adsp-21584-spi2

saying that an offset of 0x28000000 should be added. But I have added it now, and the address will still change!
How is this going?

Before enable DMA!

After enable .