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PCI express and non maskable interrupts.

Altera_Forum
Honored Contributor II
‎02-24-2015 08:31 PM
2,103 Views

Hi 

 

I have a Cyclone IV GX as a PCI express endpoint and I am wondering if it is possible to generate a non maskable interrupt to a root port for debugging purpose?  

 

Thank you
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Altera_Forum
Honored Contributor II
‎02-25-2015 09:44 AM
1,363 Views

It depends on the root port, and then whether the OS (on the root port) allows you to (easily) access to generating NMI from an MSI-X interrupt. 

If you read section 10.11 of 'Intel® 64 and IA-32 Architectures Software Developer’s Manual Volume 3A: System Programming Guide, Part 1' (253668-053US) you'll see that MSI-X can generate NMI on Intel cpus.
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