[U-Boot-Users] u-boot source codes for utx8245 don't install intel82559 pci interrupt handler

I am studying u-boot codes for utx8245. now I am confused with intel82559 pci interrupt handler. . I find that u-boot source codes for mpc824x don't implement call handler codes after getting vector, and just assign pci_interrupt_line, but don't install handler. How to find intel82559 pci interrupt handler in the source codes?

Thanks in advance!