Hi Saisurya,
If you see the imx pcie driver "drivers/pci/pcie_imx.c", the definition of imx_pcie_fix_dabt_handler(bool set) says :
/*
* Replace the original ARM DABT handler with a simple jump-back one.
*
* The problem here is that if we have a PCIe bridge attached to this PCIe
* controller, but no PCIe device is connected to the bridges' downstream
* port, the attempt to read/write from/to the config space will produce
* a DABT. This is a behavior of the controller and can not be disabled
* unfortuatelly.
*
* To work around the problem, we backup the current DABT handler address
* and replace it with our own DABT handler, which only bounces right back
* into the code.
*/
Here, *_data_abort, is the backup handler and should be defined somewhere else as declared extern here.
I've also got the same issue and narrowed down by defining it global in u-boot/arch/arm/cpu/armv7/start.S file.
Just adding below line in the mentioned file(line no. 44) helped me. Hope, it'll work for you too.
.globl _data_abort
