[seL4] Initial Thread physical to Virtual Mapping

Hello,

I am attempting to integrate the Xilinx drivers, provided through their SDK, with seL4 on the Zynq7000. In the root thread, I created a virtual mapping for the SD Card peripheral, and I pass that virtual address into the driver, so that it is reading and writing to it.

The controller has a built-in DMA that gets used for data transfer. I created a buffer in the root thread's virtual space to pass to the DMA, but it needs a physical address. I calculated the virtual/physical offset from the physical and virtual addresses for the application that are given by the elfloader, but that didn't seem to be the correct mapping.

Is there a good way to get that mapping, either from within the application itself or from the kernel before hand?

Thanks, Robbie VanVossen DornerWorks