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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)
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