How to Access PCIe ATU Registers

Hi.

I am currently running Jetpack 5.1 on Jetson AGX Xavier. How do I access the PCIe ATU registers mentioned in the Xavier Technical Reference Manual? I tried reading the value at address 0x3a040000 from a linux module, but ran into kernel panic.

Is 0x3a040000 the correct offset for accessing PCIe registers? How can I access the PCIe ATU registers without kernel panic?

The steps I follow are these:

1. Use phys_to_virt(0x3a040000) to get virtual address.


2. Read the value at this virtual address using readl() API.

When I insmod my module, I get kernel panic. How may I resolve this issue?

Regards,

Sana Ur Rehman