diff --git a/target-openrisc/Makefile.objs b/target-openrisc/Makefile.objs
index 74c4b8d..52d0158 100644
--- a/target-openrisc/Makefile.objs
+++ b/target-openrisc/Makefile.objs
@@ -1,3 +1,3 @@
 obj-$(CONFIG_SOFTMMU) += machine.o
-obj-y += cpu.o interrupt.o mmu.o translate.o
-obj-y += interrupt_helper.o mmu_helper.o
+obj-y += cpu.o exception.o interrupt.o mmu.o translate.o
+obj-y += exception_helper.o interrupt_helper.o mmu_helper.o
diff --git a/target-openrisc/exception.c b/target-openrisc/exception.c
new file mode 100644
index 0000000..67f6054
--- /dev/null
+++ b/target-openrisc/exception.c
@@ -0,0 +1,27 @@
+/*
+ * OpenRISC exception.
+ *
+ * Copyright (c) 2011-2012 Jia Liu <proljc@gmail.com>
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2 of the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include "cpu.h"
+#include "exception.h"
+
+void QEMU_NORETURN raise_exception(OpenRISCCPU *cpu, uint32_t excp)
+{
+    cpu->env.exception_index = excp;
+    cpu_loop_exit(&cpu->env);
+}
diff --git a/target-openrisc/exception.h b/target-openrisc/exception.h
new file mode 100644
index 0000000..902c89c
--- /dev/null
+++ b/target-openrisc/exception.h
@@ -0,0 +1,28 @@
+/*
+ * OpenRISC exception header.
+ *
+ * Copyright (c) 2011-2012 Jia Liu <proljc@gmail.com>
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2 of the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, see <http://www.gnu.org/licenses/>.
+ */
+
+#ifndef QEMU_OPENRISC_EXCP_H
+#define QEMU_OPENRISC_EXCP_H
+
+#include "cpu.h"
+#include "qemu-common.h"
+
+void QEMU_NORETURN raise_exception(OpenRISCCPU *cpu, uint32_t excp);
+
+#endif /* QEMU_OPENRISC_EXCP_H */
diff --git a/target-openrisc/exception_helper.c b/target-openrisc/exception_helper.c
new file mode 100644
index 0000000..dfc6dfa
--- /dev/null
+++ b/target-openrisc/exception_helper.c
@@ -0,0 +1,29 @@
+/*
+ * OpenRISC exception helper routines
+ *
+ * Copyright (c) 2011-2012 Jia Liu <proljc@gmail.com>
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2 of the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include "cpu.h"
+#include "helper.h"
+#include "exception.h"
+
+void HELPER(exception)(CPUOpenRISCState *env, uint32_t excp)
+{
+    OpenRISCCPU *cpu = OPENRISC_CPU(ENV_GET_CPU(env));
+
+    raise_exception(cpu, excp);
+}
diff --git a/target-openrisc/helper.h b/target-openrisc/helper.h
index 16d99b6..4e2a49f 100644
--- a/target-openrisc/helper.h
+++ b/target-openrisc/helper.h
@@ -19,6 +19,9 @@
 
 #include "def-helper.h"
 
+/* exception */
+DEF_HELPER_FLAGS_2(exception, 0, void, env, i32)
+
 /* interrupt */
 DEF_HELPER_FLAGS_1(rfe, 0, void, env)
 
