Interrupts and Interrupt Handling

You will find a couple of posts which describes an interrupts and an exceptions handling in the linux kernel.

Interrupts and Interrupt Handling. Part 1. - describes an interrupts handling theory.
Start to dive into interrupts in the Linux kernel - this part starts to describe interrupts and exceptions handling related stuff from the early stage.
Early interrupt handlers - third part describes early interrupt handlers.
Interrupt handlers - fourth part describes first non-early interrupt handlers.