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diff --git a/ext/nomali/lib/mmu.hh b/ext/nomali/lib/mmu.hh
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+/*
+ * Copyright (c) 2014-2015 ARM Limited
+ * All rights reserved
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *
+ * Authors: Andreas Sandberg
+ */
+
+#ifndef _LIBNOMALIMODEL_MMU_HH
+#define _LIBNOMALIMODEL_MMU_HH
+
+#include <vector>
+
+#include "gpublock.hh"
+#include "types.hh"
+
+namespace NoMali {
+
+class GPU;
+
+/**
+ * MMU dummy implementation.
+ *
+ * This is a dummy implementation of a Midgard GPU MMU block. The only
+ * features supported by the block is interrupt delivery and registers
+ * related to interrupt delivery. Writes to unimplemented registers
+ * (most registers) are discarded and their values are read as zero.
+ */
+class MMU
+    : public GPUBlockInt
+{
+  public:
+    MMU(GPU &_gpu);
+    virtual ~MMU();
+
+    void writeReg(RegAddr idx, uint32_t value) override;
+
+  protected:
+    void onInterrupt(int set) override;
+
+    RegVector regs;
+};
+
+}
+
+#endif // _LIBNOMALIMODEL_MMU_HH