How to use QorIQ LS1046A PCIe legacy INTx

[pengcheng]

Hi,

I found out that LS1046A PCIe legacy INTx is different from LS1043A, four INTx are using one interrupt line.

So there must be a register to show which intx are triggered and also a register to clear the corressponding intx.

But I can not find it in manual. Where can I get this information?

Thanks

[Pavel · Accepted solution]

PCI bus supports only four interrupt signals: #INTA, #INTB, #INTC, #INTD.

If you want to use single INTx line for 4 PCI interrupt lines, sharing of PCI interrupts should be used. Your software should support sharing of PCI interrupts.

See the following pages:

http://www.tldp.org/HOWTO/Plug-and-Play-HOWTO-7.html

and

http://www.makelinux.net/ldd3/chp-10-sect-5

Use MSI interrupts for your configuration. See the following pages:

http://www.tldp.org/HOWTO/Plug-and-Play-HOWTO-7.html

and

https://www.kernel.org/doc/Documentation/PCI/MSI-HOWTO.txt

Have a great day,
Pavel Chubakov

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