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Altera_Forum's avatar
Altera_Forum
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13 years ago

PCIe msi

Can anybody tell me how should configure "MSI enable" bit in "MSI control register" of PCI express IP is it through RTL or SYSTEM SOFTWARE

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  • Altera_Forum's avatar
    Altera_Forum
    Icon for Honored Contributor rankHonored Contributor
    13 years ago

    This is done by your system software, a.k.a. the driver. If you enable this, the device will (have to) send interrupts not as legacy interrupts but as MSI. If you disable this, the device is only allowed to use legacy interrupts.