Getting aborted when writing to bar0 of pci

HI all,
                 I am using ecos Network grg image for the intel ixp425 processor, i am able to flash the default image and work with it finly by commenting cyg_hal_plf_pci_init() in the default image.

                                       Now i am working with net image, where it uses the intel 82559 ethernet controller for this purpose, but here pci_init_find_82559s() will call
cyg_pci_int() which is calling the same routine  cyg_hal_plf_pci_init() , here the axd debugger is blocking at when it is configuring the pci as host

                        if (is_host) {

        HAL_PCI_CFG_WRITE_UINT32(0, 0, CYG_PCI_CFG_BAR_0, 0x00000000);

           
it has even detected the  82559 ethernet controller but when it calls cyg_pci_int()
it crashes at above situation.the axd shows message as unexpected debug handler behaviour.
any pointers will be helpful, what is going to toss when he is trying to write to pci configuration space .
Thanks in advance.

Thanks & regards,
Sumanth.