1 files changed, 59 insertions, 0 deletions

diff --git a/arch/mn10300/kernel/mn10300-watchdog-low.S b/arch/mn10300/kernel/mn10300-watchdog-low.S
new file mode 100644
index 000000000000..996244745cca
--- /dev/null
+++ b/arch/mn10300/kernel/mn10300-watchdog-low.S
@@ -0,0 +1,59 @@
+###############################################################################
+#
+# MN10300 Watchdog interrupt handler
+#
+# Copyright (C) 2007 Red Hat, Inc. All Rights Reserved.
+# Written by David Howells (dhowells@redhat.com)
+#
+# This program is free software; you can redistribute it and/or
+# modify it under the terms of the GNU General Public Licence
+# as published by the Free Software Foundation; either version
+# 2 of the Licence, or (at your option) any later version.
+#
+###############################################################################
+#include <linux/sys.h>
+#include <linux/linkage.h>
+#include <asm/intctl-regs.h>
+#include <asm/timer-regs.h>
+#include <asm/frame.inc>
+
+        .text
+
+###############################################################################
+#
+# Watchdog handler entry point
+# - special non-maskable interrupt
+#
+###############################################################################
+        .globl  watchdog_handler
+        .type   watchdog_handler,@function
+watchdog_handler:
+        add     -4,sp
+        SAVE_ALL
+
+        mov     0xffffffff,d0
+        mov     d0,(REG_ORIG_D0,fp)
+
+        mov     fp,d0
+        lsr     2,d1
+        call    watchdog_interrupt[],0          # watchdog_interrupt(regs,irq)
+
+        jmp     ret_from_intr
+
+        .size   watchdog_handler,.-watchdog_handler
+
+###############################################################################
+#
+# Watchdog touch entry point
+# - kept to absolute minimum (unfortunately, it's prototyped in linux/nmi.h so
+#   we can't inline it)
+#
+###############################################################################
+        .globl  touch_nmi_watchdog
+        .type   touch_nmi_watchdog,@function
+touch_nmi_watchdog:
+        clr     d0
+        mov     d0,(watchdog_alert_counter)
+        ret     [],0
+
+        .size   touch_nmi_watchdog,.-touch_nmi_watchdog