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Does Altera's PCI-Express hard IP support MSI (Message Signaled Interrupt) interrupts?
PCI Express
Yes.
In the PCI-Express hardware IP, when configured as an endpoint, it is in the state of legacy interrupts at startup. Therefore, by accessing the PCI configuration register from the root complex side and enabling MSI interrupts, MSI interrupts can be disabled. processing becomes possible.
MSI interrupts and legacy interrupts cannot be enabled at the same time.
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