Hi, The home-made interrupt controller PIC supports interrupt priorities and critical/non-critical interrupts. I found that the current kernel doesn't support interrupt priorities. Is this observation true? Is there any existing patch to support that? Can RTAI or RTLinux prioritize interrupts?
I noticed that the implementation of ppc4xx_pic.c disables all critical interrupts during initialization. To support critical interrupts, is it so simple that we change the handler of critical exception from CriticalInput to do_IRQ in head_44x.S? Would you please share some of your inputs with me while I'm googling this issue? Thanks, -Shawn.
