Handling Timer Interrupt

Hello expert’s, I’m writing the application programming interface for timer for creating a delay. The function is working perfectly fine but the problem is that i have to fix the interrupt handler for timer on a specific address. I want your precious opinions about how can i fixed the interrupt handling code on a particular address. I have only one timer so I’m not using CLINT. Is there any other way for jumping on that particular code of the handler.
Looking forward to hearing from you.
Thanks in anticipation