I'm testing PCIe with SABRE lite board. there are some questions about PCIe.
a) In chapter memory map of IMX6DQRM, it assigns a range of address as follows.
Start address End address Size Description
01FF_C000 01FF_FFFF 16KB PCIe register
0100_0000 01FF_BFFF 16368KB PCIe
I want to know the usage of the 16368KB space. Is PCIe BAR must mapped to this memory space? And is the size of BAR space must less than 16368KB?
b) I have had my board work in RC mode. How can I set PCIe working in EP mode?