How can I add another AXI MMIO port in rocket chip environment?

[Sai-Manish]

Background Work

• Yes, I searched the mailing list
• Yes, I searched the documentation

Feature Description

Hello,
I am currently exploring on how to add a AXI MMIO port to connect a device. Can anyone help me in this?
And is it possible to change the AXI address from 31 bits to 64bits ?

Thanks and Regards,
Sai Manish S

Motivating Example

Would like to add multiple AXI devices to rocket chip.