1 files changed, 48 insertions, 0 deletions

diff --git a/arch/mips/txx9/generic/irq_tx4938.c b/arch/mips/txx9/generic/irq_tx4938.c
new file mode 100644
index 000000000000..0886d9138818
--- /dev/null
+++ b/arch/mips/txx9/generic/irq_tx4938.c
@@ -0,0 +1,48 @@
+/*
+ * linux/arch/mips/tx4938/common/irq.c
+ *
+ * Common tx4938 irq handler
+ * Copyright (C) 2000-2001 Toshiba Corporation
+ *
+ * 2003-2005 (c) MontaVista Software, Inc. This file is licensed under the
+ * terms of the GNU General Public License version 2. This program is
+ * licensed "as is" without any warranty of any kind, whether express
+ * or implied.
+ *
+ * Support for TX4938 in 2.6 - Manish Lachwani (mlachwani@mvista.com)
+ */
+#include <linux/init.h>
+#include <linux/interrupt.h>
+#include <asm/irq_cpu.h>
+#include <asm/mipsregs.h>
+#include <asm/txx9/rbtx4938.h>
+
+void __init
+tx4938_irq_init(void)
+{
+        mips_cpu_irq_init();
+        txx9_irq_init(TX4938_IRC_REG);
+        set_irq_chained_handler(TX4938_IRQ_NEST_PIC_ON_CP0, handle_simple_irq);
+}
+
+int toshiba_rbtx4938_irq_nested(int irq);
+
+asmlinkage void plat_irq_dispatch(void)
+{
+        unsigned int pending = read_c0_cause() & read_c0_status();
+
+        if (pending & STATUSF_IP7)
+                do_IRQ(TX4938_IRQ_CPU_TIMER);
+        else if (pending & STATUSF_IP2) {
+                int irq = txx9_irq();
+                if (irq == TX4938_IRQ_PIC_BEG + TX4938_IR_INT(0))
+                        irq = toshiba_rbtx4938_irq_nested(irq);
+                if (irq >= 0)
+                        do_IRQ(irq);
+                else
+                        spurious_interrupt();
+        } else if (pending & STATUSF_IP1)
+                do_IRQ(TX4938_IRQ_USER1);
+        else if (pending & STATUSF_IP0)
+                do_IRQ(TX4938_IRQ_USER0);
+}