[U-Boot] Irq handler code is not working in u-boot

[VISWANADHULA BALAJI]

Hi,
      In start.S file irq_handler code is used for handling the irq
interrupts though iam able to handle the interrupt, iam not able to restore
the previous state. irq_restore_user_regs label is given generally in all
u-boots for restoring the state but not happens. Please do needful how i
come out from this.

Thanks
balaji