1 files changed, 69 insertions, 0 deletions

diff --git a/arch/mips/lasat/lasatIRQ.S b/arch/mips/lasat/lasatIRQ.S
new file mode 100644
index 000000000000..2a2b0d056561
--- /dev/null
+++ b/arch/mips/lasat/lasatIRQ.S
@@ -0,0 +1,69 @@
+/*
+ * Carsten Langgaard, carstenl@mips.com
+ * Copyright (C) 1999, 2000 MIPS Technologies, Inc.  All rights reserved.
+ *
+ *  This program is free software; you can distribute it and/or modify it
+ *  under the terms of the GNU General Public License (Version 2) as
+ *  published by the Free Software Foundation.
+ *
+ *  This program is distributed in the hope it will be useful, but WITHOUT
+ *  ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ *  FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ *  for more details.
+ *
+ *  You should have received a copy of the GNU General Public License along
+ *  with this program; if not, write to the Free Software Foundation, Inc.,
+ *  59 Temple Place - Suite 330, Boston MA 02111-1307, USA.
+ *
+ * Interrupt exception dispatch code.
+ */
+#include <asm/asm.h>
+#include <asm/mipsregs.h>
+#include <asm/regdef.h>
+#include <asm/stackframe.h>
+
+        .text
+        .set    noreorder
+        .align  5
+        NESTED(lasatIRQ, PT_SIZE, sp)
+        .set    noat
+        SAVE_ALL
+        CLI
+        .set    at
+        .set    noreorder
+
+        mfc0    s0, CP0_CAUSE           # get irq mask
+
+        /* First we check for r4k counter/timer IRQ. */
+        andi    a0, s0, CAUSEF_IP7
+        beq     a0, zero, 1f
+         andi   a0, s0, CAUSEF_IP2      # delay slot, check hw0 interrupt
+
+        /* Wheee, a timer interrupt. */
+        li      a0, 7
+        jal     ll_timer_interrupt
+         move   a1, sp
+
+        j       ret_from_irq
+         nop
+
+1:
+        /* Wheee, combined hardware level zero interrupt. */
+        jal     lasat_hw0_irqdispatch
+         move   a0, sp                  # delay slot
+
+        j       ret_from_irq
+         nop                            # delay slot
+
+1:
+        /*
+         * Here by mistake?  This is possible, what can happen is that by the
+         * time we take the exception the IRQ pin goes low, so just leave if
+         * this is the case.
+         */
+        move    a1,s0
+        mfc0    a1, CP0_EPC
+
+        j       ret_from_irq
+         nop
+        END(lasatIRQ)