[ixp1200] VERA on target (SA) linux

Hi, I am working on a project to adapt the VERA code (mainly the IPmm) to run on IXP1200's strongarm Linux in big-endian. This way, there will be no PCI interface to a Pentium host. I want to map the 8-port MAC controller to a logical network device in the kernel and treat them as normal ethernet devices. What is the best way to hook up (interrupt) to "packet receive" in Libixprouter or Runtime, so that the driver can be noified when a packet is avialable? Assumming that the cache table is empty and everything is a miss requiring an external forwarding... Thanks! Charles