diff --git a/drivers/mailbox/src/mailbox.cpp b/drivers/mailbox/src/mailbox.cpp
new file mode 100644
index 0000000..e5950f0
--- /dev/null
+++ b/drivers/mailbox/src/mailbox.cpp
@@ -0,0 +1,65 @@
+/*
+ * Copyright (c) 2020-2021 Arm Limited. All rights reserved.
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * 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
+ *
+ * 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.
+ */
+
+#include <mailbox.hpp>
+
+#include <cassert>
+#include <cstddef>
+
+namespace Mailbox {
+
+Mailbox::Mailbox() {}
+Mailbox::~Mailbox() {}
+
+bool Mailbox::verifyHardware() {
+    return true;
+}
+
+void Mailbox::registerCallback(CallbackFptr callback, void *userArg) {
+    callbacks.push_back({callback, userArg});
+}
+
+void Mailbox::deregisterCallback(CallbackFptr callback, void *userArg) {
+    callbacks.remove({callback, userArg});
+}
+
+void Mailbox::notify() {
+    for (auto &it : callbacks) {
+        it.callback(it.userArg);
+    }
+}
+
+uint32_t Mailbox::read32(volatile uint32_t *baseAddr, const uint32_t offset) {
+    assert(offset % 4 == 0);
+    volatile uint32_t *addr = baseAddr + (offset / 4);
+
+    return *addr;
+}
+
+void Mailbox::write32(volatile uint32_t *baseAddr, const uint32_t offset, const uint32_t value) {
+    assert(offset % 4 == 0);
+    volatile uint32_t *addr = baseAddr + (offset / 4);
+
+    *addr = value;
+}
+
+bool Mailbox::Callback::operator==(const Callback &b) const {
+    return (callback == b.callback && userArg == b.userArg);
+}
+
+} // namespace Mailbox