patch-2.4.19 linux-2.4.19/arch/mips/cobalt/int-handler.S

• Lines: 104
• Date: Fri Aug 2 17:39:43 2002
• Orig file: linux-2.4.18/arch/mips/cobalt/int-handler.S
• Orig date: Wed Dec 31 16:00:00 1969

diff -urN linux-2.4.18/arch/mips/cobalt/int-handler.S linux-2.4.19/arch/mips/cobalt/int-handler.S
@@ -0,0 +1,103 @@
+/*
+ * Cobalt interrupt handler
+ *
+ * This file is subject to the terms and conditions of the GNU General Public
+ * License.  See the file "COPYING" in the main directory of this archive
+ * for more details.
+ *
+ * Copyright (C) 1995, 1996, 1997 by Ralf Baechle
+ * Copyright (C) 2001 by Liam Davies (ldavies@agile.tv)
+ *
+ */
+#include <asm/asm.h>
+#include <asm/mipsregs.h>
+#include <asm/cobalt/cobalt.h>
+#include <asm/regdef.h>
+#include <asm/stackframe.h>
+
+/*
+ * cobalt_handle_int: Interrupt handler for Cobalt boards
+ */
+		.text
+		.set	noreorder
+		.set	noat
+		.align	5
+		NESTED(cobalt_handle_int, PT_SIZE, sp)
+		SAVE_ALL
+		CLI
+		.set	at
+	
+		/* 
+		 * Get pending Interrupts
+		 */
+		mfc0	s0,CP0_CAUSE	# get irq mask
+
+		andi	a0,s0,CAUSEF_IP2	/* Check for Galileo timer */
+		beq	a0,zero,1f
+		 andi	a0,s0,CAUSEF_IP6	/* Check for Via chip */
+
+		/* Galileo interrupt */
+		jal	galileo_irq
+		 move	a0,sp
+		j	ret_from_irq
+		 nop
+
+1:
+		beq	a0,zero,1f		/* Check IP6 */
+		 andi	a0,s0,CAUSEF_IP3
+
+		/* Via interrupt */
+		jal	via_irq
+		 move	a0,sp
+		j	ret_from_irq
+		 nop
+
+1:	
+		beq	a0,zero,1f		/* Check IP3 */
+		 andi	a0,s0,CAUSEF_IP4
+
+		/* Ethernet 0 interrupt */
+		li	a0,4
+		jal     do_IRQ
+		 move	a1,sp
+
+		j	ret_from_irq
+		 nop
+
+1:	
+		beq	a0,zero,1f		/* Check IP4 */
+		 andi	a0,s0,CAUSEF_IP5
+
+		/* Ethernet 1 interrupt */
+		li	a0,13
+		jal     do_IRQ
+		 move	a1,sp
+
+		j	ret_from_irq
+		 nop
+1:	
+		beq	a0,zero,1f		/* Check IP5 */
+		 andi	a0,s0,CAUSEF_IP7
+
+		/* Serial interrupt */
+		li	a0,7
+		jal     do_IRQ
+		 move	a1,sp
+
+		j	ret_from_irq
+		 nop
+1:	
+		beq	a0,zero,1f		/* Check IP7 */
+		  nop
+
+		/* PCI interrupt */
+		li	a0,9
+		jal     do_IRQ
+		 move	a1,sp
+
+1:
+		j	ret_from_irq
+		 nop
+
+		END(cobalt_handle_int)
+