How to do code coverage analysis on ARM Cortex-M0?

Hello,

we are using ARM core cortex-M0 in our chipset and we would like to enhance our FW code quality by having a view on the code coverage of our test suite.

What are the available tools, hw / SW? what could be the advantage to adopt a M0+ core instead of M0?

Is there also some solution available on HW simulation environment?

Thanks