70 lines
1.5 KiB
ArmAsm
70 lines
1.5 KiB
ArmAsm
/*
|
|
* 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
|
|
jal spurious_interrupt
|
|
j ret_from_irq
|
|
END(au1000_IRQ)
|