patch-2.4.10 linux/arch/mips64/sgi-ip32/ip32-irq-glue.S

• Lines: 88
• Date: Sun Sep 9 10:43:02 2001
• Orig file: v2.4.9/linux/arch/mips64/sgi-ip32/ip32-irq-glue.S
• Orig date: Wed Dec 31 16:00:00 1969

diff -u --recursive --new-file v2.4.9/linux/arch/mips64/sgi-ip32/ip32-irq-glue.S linux/arch/mips64/sgi-ip32/ip32-irq-glue.S
@@ -0,0 +1,87 @@
+/*
+ * Low level interrupt handler for the SGI O2 aka IP32 aka Moosehead
+ *
+ * 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) 2000 Harald Koerfgen
+ * Copyright (C) 2001 Keith M Wesolowski
+ */
+#include <asm/asm.h>
+#include <asm/regdef.h>
+#include <asm/mipsregs.h>
+#include <asm/stackframe.h>
+#include <asm/addrspace.h>
+#include <asm/ip32/ip32_ints.h>
+
+		.text
+		.set    noreorder
+		.set    noat
+		.align  5
+		NESTED(ip32_handle_int, PT_SIZE, ra)
+		.set    noat
+		SAVE_ALL
+		CLI			# TEST: interrupts should be off
+		.set    at
+		.set    noreorder
+
+		mfc0	s0,CP0_CAUSE
+
+		andi	t1, s0, IE_IRQ0
+		bnez	t1, handle_irq0
+		 andi	t1, s0, IE_IRQ1
+		bnez	t1, handle_irq1
+		 andi	t1, s0, IE_IRQ2
+		bnez	t1, handle_irq2
+		 andi	t1, s0, IE_IRQ3
+		bnez	t1, handle_irq3
+		 andi	t1, s0, IE_IRQ4
+		bnez	t1, handle_irq4
+		 andi	t1, s0, IE_IRQ5
+		bnez	t1, handle_irq5
+		 nop
+
+		/* Either someone has triggered the "software interrupts"
+		 * or we lost an interrupt somehow.  Ignore it.
+		 */
+		j	ret_from_irq
+		 nop
+
+handle_irq0:
+		jal	ip32_irq0
+		 move	a0, sp
+		j	ret_from_irq
+		 nop
+
+handle_irq1:
+		jal	ip32_irq1
+		 move	a0, sp
+		j	ret_from_irq
+		 nop
+
+handle_irq2:
+		jal	ip32_irq2
+		 move	a0, sp
+		j	ret_from_irq
+		 nop
+
+handle_irq3:
+		jal	ip32_irq3
+		 move	a0, sp
+		j	ret_from_irq
+		 nop
+
+handle_irq4:
+		jal	ip32_irq4
+		 move	a0, sp
+		j	ret_from_irq
+		 nop
+
+handle_irq5:
+		jal	ip32_irq5
+		move	a0, sp
+		j	ret_from_irq
+		 nop
+
+		END(ip32_handle_int)