Avalon Bus Address alignment

The problem what I'm actually facing is I have control registers, which i access through Avalon Bus and perform read and write operations.

Internally I have assigned register addresses as 0 1 2 3 4 5 etc. I'm facing problems trying to map the addresses sent by Avalon Bus to my internal register addresses.

I came across the document "Avalon Bus Specification Reference Manual" in which there is the concept of address alignment, Native address alignment in particular which solves my problem, but I'm not able to implement it.