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-rw-r--r--arch/mips/sgi-ip27/ip27-irq-glue.S45
1 files changed, 45 insertions, 0 deletions
diff --git a/arch/mips/sgi-ip27/ip27-irq-glue.S b/arch/mips/sgi-ip27/ip27-irq-glue.S
new file mode 100644
index 000000000000..c304df715e0a
--- /dev/null
+++ b/arch/mips/sgi-ip27/ip27-irq-glue.S
@@ -0,0 +1,45 @@
+/*
+ * 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) 1999 Ralf Baechle
+ * Copyright (C) 1999 Silicon Graphics, Inc.
+ */
+#include <asm/asm.h>
+#include <asm/mipsregs.h>
+#include <asm/regdef.h>
+#include <asm/stackframe.h>
+
+ .text
+ .align 5
+NESTED(ip27_irq, PT_SIZE, sp)
+ SAVE_ALL
+ CLI
+
+ mfc0 s0, CP0_CAUSE
+ mfc0 t0, CP0_STATUS
+ and s0, t0
+ move a0, sp
+ PTR_LA ra, ret_from_irq
+
+ /* First check for RT interrupt. */
+ andi t0, s0, CAUSEF_IP4
+ bnez t0, ip4
+ andi t0, s0, CAUSEF_IP2
+ bnez t0, ip2
+ andi t0, s0, CAUSEF_IP3
+ bnez t0, ip3
+ andi t0, s0, CAUSEF_IP5
+ bnez t0, ip5
+ andi t0, s0, CAUSEF_IP6
+ bnez t0, ip6
+ j ra
+
+ip2: j ip27_do_irq_mask0 # PI_INT_PEND_0 or CC_PEND_{A|B}
+ip3: j ip27_do_irq_mask1 # PI_INT_PEND_1
+ip4: j ip27_rt_timer_interrupt
+ip5: j ip27_prof_timer
+ip6: j ip27_hub_error
+
+ END(ip27_irq)