XDMA上位机相关：一点笔记

参考代码：

https://github.com/SanjayRai/SRAI_HW_ACCEL_WINDOWS10_PCIe/blob/master/sw/inc/xdma_public.h

https://github.com/SanjayRai/SRAI_HW_ACCEL_WINDOWS10_PCIe/tree/master