[linux-sh:03401] shift from irq_imask to irq_ipr

Hi Everyone!

I am porting linux kernel 2.4.26 on MS7751RCP01 board.
The kernel works fine with support of devices like
pcmcia, usb, uart, lcd etc, with the irq_imask (refer
arch/sh/kernel/irq_imask.c).  

I am trying to change the handler model to irq_ipr. 
The FPGA seems to be non-co-operative.  As many many
encoding is hard inside, and cant be programmed as
other boards from hitachi/renesas.

Is there any way to eliminate irq_imask model for
external hardware (at least for USB), and to run
new(?) model which doesn't change the CPU registers
but go for other way-around.

Thanks in advance.

Best Regards,
Vijay


		
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