Write Avalon-ST data packets to sdram

I am wondering that how can I write the Avalon-st data packets to SDRAM (which is use Avalon mm interface) without using Nios II. Should I use Avalon FIFO Memory as input side AVALONST_SINK and output side AVALONMM_READ.

And for reading to SDRAM I need to do Avalon MM to Avalon ST conversion as well.

Thanks for any help.