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diff --git a/userspace/include/unit/core.h b/userspace/include/unit/core.h
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+/*
+ * Copyright (c) 2018, NVIDIA CORPORATION.  All rights reserved.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
+ * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
+ * DEALINGS IN THE SOFTWARE.
+ */
+
+#ifndef __UNIT_CORE_H__
+#define __UNIT_CORE_H__
+
+struct unit_fw_args;
+struct unit_modules;
+struct unit_results;
+
+struct gk20a;
+
+/*
+ * The core unit testing framework data structure. Keeps track of global state
+ * for the unit test app.
+ */
+struct unit_fw {
+        struct unit_fw_args      *args;
+
+        struct unit_module      **modules;
+
+        struct unit_results      *results;
+
+        /*
+         * nvgpu-drv interface. Currently the only two directly referenced
+         * functions are:
+         *
+         *   nvgpu_posix_probe()
+         *   nvgpu_posix_cleanup()
+         *
+         * There will get populated so that we can call them before/after each
+         * module.
+         */
+        void                     *nvgpu_so;
+        struct {
+                struct gk20a    *(*nvgpu_posix_probe)(void);
+                void             (*nvgpu_posix_cleanup)(struct gk20a *g);
+        } nvgpu;
+};
+
+int core_load_nvgpu(struct unit_fw *fw);
+int core_exec(struct unit_fw *fw);
+
+#endif