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Diffstat (limited to 'arch/mips/au1000/common/int-handler.S')
-rw-r--r--arch/mips/au1000/common/int-handler.S68
1 files changed, 68 insertions, 0 deletions
diff --git a/arch/mips/au1000/common/int-handler.S b/arch/mips/au1000/common/int-handler.S
new file mode 100644
index 000000000000..1c4ca883321e
--- /dev/null
+++ b/arch/mips/au1000/common/int-handler.S
@@ -0,0 +1,68 @@
+/*
+ * Copyright 2001 MontaVista Software Inc.
+ * Author: ppopov@mvista.com
+ *
+ * Interrupt dispatcher for Au1000 boards.
+ *
+ * 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 <asm/asm.h>
+#include <asm/mipsregs.h>
+#include <asm/addrspace.h>
+#include <asm/regdef.h>
+#include <asm/stackframe.h>
+
+ .text
+ .set macro
+ .set noat
+ .align 5
+
+NESTED(au1000_IRQ, PT_SIZE, sp)
+ SAVE_ALL
+ CLI # Important: mark KERNEL mode !
+
+ mfc0 t0,CP0_CAUSE # get pending interrupts
+ mfc0 t1,CP0_STATUS # get enabled interrupts
+ and t0,t1 # isolate allowed ones
+
+ andi t0,0xff00 # isolate pending bits
+ beqz t0, 3f # spurious interrupt
+
+ andi a0, t0, CAUSEF_IP7
+ beq a0, zero, 1f
+ move a0, sp
+ jal mips_timer_interrupt
+ j ret_from_irq
+
+1:
+ andi a0, t0, CAUSEF_IP2 # Interrupt Controller 0, Request 0
+ beq a0, zero, 2f
+ move a0,sp
+ jal intc0_req0_irqdispatch
+ j ret_from_irq
+2:
+ andi a0, t0, CAUSEF_IP3 # Interrupt Controller 0, Request 1
+ beq a0, zero, 3f
+ move a0,sp
+ jal intc0_req1_irqdispatch
+ j ret_from_irq
+3:
+ andi a0, t0, CAUSEF_IP4 # Interrupt Controller 1, Request 0
+ beq a0, zero, 4f
+ move a0,sp
+ jal intc1_req0_irqdispatch
+ j ret_from_irq
+4:
+ andi a0, t0, CAUSEF_IP5 # Interrupt Controller 1, Request 1
+ beq a0, zero, 5f
+ move a0, sp
+ jal intc1_req1_irqdispatch
+ j ret_from_irq
+
+5:
+ move a0, sp
+ j spurious_interrupt
+END(au1000_IRQ)