patch-2.4.10 linux/arch/mips/ddb5xxx/ddb5477/int-handler.S

• Lines: 77
• Date: Sun Sep 9 10:43:01 2001
• Orig file: v2.4.9/linux/arch/mips/ddb5xxx/ddb5477/int-handler.S
• Orig date: Wed Dec 31 16:00:00 1969

diff -u --recursive --new-file v2.4.9/linux/arch/mips/ddb5xxx/ddb5477/int-handler.S linux/arch/mips/ddb5xxx/ddb5477/int-handler.S
@@ -0,0 +1,76 @@
+/*
+ * Copyright 2001 MontaVista Software Inc.
+ * Author: jsun@mvista.com or jsun@junsun.net
+ *
+ * First-level interrupt dispatcher for ddb5477
+ *
+ * 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>
+
+/*
+ * first level interrupt dispatcher for ocelot board -
+ * We check for the timer first, then check PCI ints A and D.
+ * Then check for serial IRQ and fall through.
+ */
+	.align	5
+	NESTED(ddb5477_handle_int, PT_SIZE, sp)
+	SAVE_ALL
+	CLI
+	.set	at
+	.set	noreorder
+	mfc0	t0, CP0_CAUSE  
+	mfc0	t2, CP0_STATUS
+
+	and	t0, t2
+       
+	andi	t1, t0, STATUSF_IP7	/* cpu timer */
+	bnez	t1, ll_cputimer_irq
+	andi	t1, t0, (STATUSF_IP2 | STATUSF_IP3 | STATUSF_IP4 | STATUSF_IP5 | STATUSF_IP6 ) 
+	bnez	t1, ll_vrc5477_irq
+	andi	t1, t0, STATUSF_IP0	/* software int 0 */
+	bnez	t1, ll_cpu_ip0
+	andi	t1, t0, STATUSF_IP1	/* software int 1 */
+	bnez	t1, ll_cpu_ip1
+	nop
+	.set	reorder
+
+	/* wrong alarm or masked ... */
+	j	spurious_interrupt
+	nop
+	END(ddb5477_handle_int)
+
+	.align	5
+
+ll_vrc5477_irq:	
+	move	a0, sp
+	jal	vrc5477_irq_dispatch
+	j	ret_from_irq
+
+ll_cputimer_irq:
+	li	a0, 7
+	move	a1, sp
+	jal	do_IRQ
+	j	ret_from_irq
+
+
+ll_cpu_ip0:	
+	li	a0, 0
+	move	a1, sp
+	jal	do_IRQ
+	j	ret_from_irq
+
+ll_cpu_ip1:	
+	li	a0, 1
+	move	a1, sp
+	jal	do_IRQ
+	j	ret_from_irq