Irq_table not loaded when boot from etherboot

[Lawrence LL. Dai]

Hi All:

I have tried to boot from network with linuxbios and failed. The output showed:

"PCI: No IRQ known for interrupt pin A of device 04:01.0. Probably buggy MP table"

Will the irq_table only be loaded in hardwaremain() which is not called in etherboot? 
Who can give me some help? Thanks.

Ps: the attached is the output.

Best wishes,
Lawrence