diff --git a/util/m5/README.md b/util/m5/README.md
index b9ccbff557..cbdff1d12f 100644
--- a/util/m5/README.md
+++ b/util/m5/README.md
@@ -362,6 +362,19 @@ gem5.Ops gem5_ops = gem5.Ops.callTypes.get("default");
 long sum = gem5_ops.sum(1, 2, 3, 4, 5, 6);
 ```
 
+To configure the address based trigger mechanism, you can use these static
+methods.
+
+void setAddr(long addr);
+Set the address for the "magic" address region.
+
+void mapMem();
+Map the "magic" physical address region into the process' address space, likely
+by mmapping the "/dev/mem" device file.
+
+void unmapMem();
+Unmap the "magic" physical address region that was previously mapped.
+
 
 
 # lua module
diff --git a/util/m5/src/java/gem5/Ops.java b/util/m5/src/java/gem5/Ops.java
index f6ab178dbe..ab25419479 100644
--- a/util/m5/src/java/gem5/Ops.java
+++ b/util/m5/src/java/gem5/Ops.java
@@ -53,6 +53,10 @@ public class Ops {
     private static Map<String, Ops> _callTypes;
     public static final Map<String, Ops> callTypes;
 
+    public static native void setAddr(long addr);
+    public static native void mapMem();
+    public static native void unmapMem();
+
     static {
         try {
             File temp_lib = File.createTempFile("gem5Ops", ".so");
diff --git a/util/m5/src/java/gem5/ops.cc b/util/m5/src/java/gem5/ops.cc
index c1f36e483c..da21840766 100644
--- a/util/m5/src/java/gem5/ops.cc
+++ b/util/m5/src/java/gem5/ops.cc
@@ -44,6 +44,7 @@
 #include "call_type/semi_dt.hh"
 #include "gem5/m5ops.h"
 #include "java/gem5_Ops.h"
+#include "m5_mmap.h"
 
 #define _stringify(x) #x
 #define stringify(x) _stringify(x)
@@ -108,6 +109,24 @@ Java_gem5_Ops_setupCallTypes(JNIEnv *env, jclass clazz)
     env->DeleteLocalRef(map);
 }
 
+JNIEXPORT void JNICALL
+Java_gem5_Ops_setAddr(JNIEnv *env, jclass clazz, jlong addr)
+{
+    m5op_addr = addr;
+}
+
+JNIEXPORT void JNICALL
+Java_gem5_Ops_mapMem(JNIEnv *env, jclass clazz)
+{
+    map_m5_mem();
+}
+
+JNIEXPORT void JNICALL
+Java_gem5_Ops_unmapMem(JNIEnv *env, jclass clazz)
+{
+    unmap_m5_mem();
+}
+
 static DispatchTable *
 getDispatchTable(JNIEnv *env, jobject obj)
 {