69 lines
1.5 KiB
ArmAsm
69 lines
1.5 KiB
ArmAsm
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/*
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* Copyright 2001 MontaVista Software Inc.
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* Author: ppopov@mvista.com
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*
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* Interrupt dispatcher for Au1000 boards.
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License as published by the
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* Free Software Foundation; either version 2 of the License, or (at your
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* option) any later version.
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*/
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#include <asm/asm.h>
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#include <asm/mipsregs.h>
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#include <asm/addrspace.h>
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#include <asm/regdef.h>
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#include <asm/stackframe.h>
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.text
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.set macro
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.set noat
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.align 5
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NESTED(au1000_IRQ, PT_SIZE, sp)
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SAVE_ALL
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CLI # Important: mark KERNEL mode !
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mfc0 t0,CP0_CAUSE # get pending interrupts
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mfc0 t1,CP0_STATUS # get enabled interrupts
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and t0,t1 # isolate allowed ones
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andi t0,0xff00 # isolate pending bits
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beqz t0, 3f # spurious interrupt
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andi a0, t0, CAUSEF_IP7
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beq a0, zero, 1f
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move a0, sp
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jal mips_timer_interrupt
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j ret_from_irq
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1:
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andi a0, t0, CAUSEF_IP2 # Interrupt Controller 0, Request 0
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beq a0, zero, 2f
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move a0,sp
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jal intc0_req0_irqdispatch
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j ret_from_irq
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2:
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andi a0, t0, CAUSEF_IP3 # Interrupt Controller 0, Request 1
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beq a0, zero, 3f
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move a0,sp
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jal intc0_req1_irqdispatch
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j ret_from_irq
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3:
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andi a0, t0, CAUSEF_IP4 # Interrupt Controller 1, Request 0
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beq a0, zero, 4f
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move a0,sp
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jal intc1_req0_irqdispatch
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j ret_from_irq
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4:
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andi a0, t0, CAUSEF_IP5 # Interrupt Controller 1, Request 1
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beq a0, zero, 5f
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move a0, sp
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jal intc1_req1_irqdispatch
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j ret_from_irq
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5:
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move a0, sp
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j spurious_interrupt
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END(au1000_IRQ)
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