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/*
 * Copyright 2001 MontaVista Software Inc.
 * Author: ppopov@mvista.com
 *
 * Interrupt dispatcher for Au1000 boards.
 *
 * This program is free software; you can redistribute  it and/or modify it
 * under  the terms of  the GNU General  Public License as published by the
 * Free Software Foundation;  either version 2 of the  License, or (at your
 * option) any later version.
 */
#include <asm/asm.h>
#include <asm/mipsregs.h>
#include <asm/addrspace.h>
#include <asm/regdef.h>
#include <asm/stackframe.h>

        .text
        .set    macro
        .set    noat
        .align  5

NESTED(au1000_IRQ, PT_SIZE, sp)
        SAVE_ALL
        CLI                             # Important: mark KERNEL mode !

        mfc0    t0,CP0_CAUSE            # get pending interrupts
        mfc0    t1,CP0_STATUS           # get enabled interrupts
        and     t0,t1                   # isolate allowed ones

        andi    t0,0xff00               # isolate pending bits
        beqz    t0, 3f                  # spurious interrupt

        andi    a0, t0, CAUSEF_IP7
        beq     a0, zero, 1f
        move    a0, sp
        jal     mips_timer_interrupt
        j       ret_from_irq

1:
        andi    a0, t0, CAUSEF_IP2      # Interrupt Controller 0, Request 0
        beq     a0, zero, 2f
        move    a0,sp
        jal     intc0_req0_irqdispatch
        j       ret_from_irq
2:
        andi    a0, t0, CAUSEF_IP3      # Interrupt Controller 0, Request 1
        beq     a0, zero, 3f
        move    a0,sp
        jal     intc0_req1_irqdispatch
        j       ret_from_irq
3:
        andi    a0, t0, CAUSEF_IP4      # Interrupt Controller 1, Request 0
        beq     a0, zero, 4f
        move    a0,sp
        jal     intc1_req0_irqdispatch
        j       ret_from_irq
4:
        andi    a0, t0, CAUSEF_IP5      # Interrupt Controller 1, Request 1
        beq     a0, zero, 5f
        move    a0, sp
        jal     intc1_req1_irqdispatch
        j       ret_from_irq

5:
        move    a0, sp
        j       spurious_interrupt
END(au1000_IRQ)