TDA4VM: How can Linux application allocate memory from physical address?

Hello,

I'm trying to share memory between R5(sysbios) and A72(Linux) without IPC.

R5 and A72 need to be able to access the same physical address, so I'm looking for the way to get virtual address from physical address on Linux. 

I read the below link. Is says that TI recommends to use dma-buf heap instead of mmap. 

  - https://e2e.ti.com/support/processors-group/processors/f/processors-forum/923819/tda4vm-access-to-shared-mem-through-dev-mem-seems-slow

I think TI provides functions to use dma-buf heap in the below link. If not, could you let me know the functions and usage briefly?

 - https://software-dl.ti.com/jacinto7/esd/processor-sdk-rtos-jacinto7/07_01_00_11/exports/docs/vision_apps/docs/user_guide/group__group__vision__apps__utils__mem.html

Could you let me know how to get virtual address from physical address with these functions?

Thank you.

Best Regards,