Reorganization directory structure [3/n]

Change-Id: If3dfa3f6007f8810a6a1ae1a4f0c7da38544648d

shared/source/gmm_helper/gmm_helper.h

@@ -0,0 +1,49 @@
+/*
+ * Copyright (C) 2017-2020 Intel Corporation
+ *
+ * SPDX-License-Identifier: MIT
+ *
+ */
+
+#pragma once
+#include "gmm_helper/gmm_lib.h"
+#include "helpers/basic_math.h"
+#include "memory_manager/memory_constants.h"
+
+#include <memory>
+
+namespace NEO {
+class GmmClientContext;
+class OsLibrary;
+class OSInterface;
+struct HardwareInfo;
+
+class GmmHelper {
+  public:
+    GmmHelper() = delete;
+    GmmHelper(OSInterface *osInterface, const HardwareInfo *hwInfo);
+    MOCKABLE_VIRTUAL ~GmmHelper();
+
+    const HardwareInfo *getHardwareInfo();
+    uint32_t getMOCS(uint32_t type) const;
+
+    static constexpr uint64_t maxPossiblePitch = 2147483648;
+
+    static uint64_t canonize(uint64_t address) {
+        return static_cast<int64_t>(address << (64 - GmmHelper::addressWidth)) >> (64 - GmmHelper::addressWidth);
+    }
+
+    static uint64_t decanonize(uint64_t address) {
+        return (address & maxNBitValue(GmmHelper::addressWidth));
+    }
+
+    GmmClientContext *getClientContext() const;
+
+    static std::unique_ptr<GmmClientContext> (*createGmmContextWrapperFunc)(OSInterface *, HardwareInfo *);
+
+  protected:
+    static uint32_t addressWidth;
+    const HardwareInfo *hwInfo = nullptr;
+    std::unique_ptr<GmmClientContext> gmmClientContext;
+};
+} // namespace NEO