1 files changed, 86 insertions, 0 deletions

diff --git a/arch/mips/sgi-ip32/ip32-irq-glue.S b/arch/mips/sgi-ip32/ip32-irq-glue.S
new file mode 100644
index 000000000000..200924e1c4f5
--- /dev/null
+++ b/arch/mips/sgi-ip32/ip32-irq-glue.S
@@ -0,0 +1,86 @@
+/*
+ * 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>
+
+                .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)