patch-2.4.10 linux/arch/mips/au1000/common/int-handler.S

• Lines: 72
• Date: Sun Sep 9 10:43:01 2001
• Orig file: v2.4.9/linux/arch/mips/au1000/common/int-handler.S
• Orig date: Wed Dec 31 16:00:00 1969

diff -u --recursive --new-file v2.4.9/linux/arch/mips/au1000/common/int-handler.S linux/arch/mips/au1000/common/int-handler.S
@@ -0,0 +1,71 @@
+/*
+ * 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 <linux/config.h>
+#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	mips_spurious_interrupt
+done:
+	j	ret_from_irq
+END(au1000_IRQ)