Read data DDR3 SDRAM/ FPGA from HPS?

Hi everyone!

I have a project, I use camera OV7670 capture image, data from camera will be sent to Frame buffer that buffers in DDR3-SDRAM. I create Qsys component to connect HPS with DDR3-SDRAM/FPGA. Now, I want to read data in DDR3-SDRAM/FPGA from arm/HPS. has anyone give me a direction?

Thanks you so much!