Machine check handler

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Machine check handler

Machine check handler usually splits into two parts:

•

Low level handler

•

User handler

2.1

Low level handler

Low level handler is responsible for first and last part of the exception execution. It is usually

written in assembly language as it needs to execute proper instruction sequence before it

can pass the code execution to higher level routine and accesses special purpose Core

registers.

The middle of the interrupt service routine belongs to the user handler where analysis of the

root cause of the exception and fault removal is done.

Once the user handler finishes, code execution is given back to the low level driver to finish

the interrupt and return back to the interrupt process.

Figure 1. Machine check exception flow