diff --git a/firmware/controllers/math/config_engine_specs.h b/firmware/controllers/math/config_engine_specs.h
new file mode 100644
index 0000000000..403aa77a25
--- /dev/null
+++ b/firmware/controllers/math/config_engine_specs.h
@@ -0,0 +1,39 @@
+/*
+ * @file config_engine_specs.h
+ *
+ * @date Jan 28, 2019
+ * @author Andrey Belomutskiy, (c) 2012-2019
+ */
+
+#ifndef CONTROLLERS_MATH_CONFIG_ENGINE_SPECS_H_
+#define CONTROLLERS_MATH_CONFIG_ENGINE_SPECS_H_
+
+#include "global.h"
+
+/**
+ * All these scary macro are about three goals:
+ * 1) performance optimization: real ECU hardware firmware should access configuration via direct global variable access without any pointers
+ * 2) design enforcement: unit tests should access configuration via pointers, NOT via global variables
+ * 3) design enforcement: user code should take special considerations in order to access specific group of configuration and not have access to complete configuration by default
+ */
+
+#if EFI_UNIT_TEST
+#define DECLARE_GLOBAL_SIGNATURE Engine *engine, engine_configuration_s *___engineConfiguration, persistent_config_s *config, board_configuration_s *boardConfiguration
+#define DECLARE_GLOBAL_SUFFIX , DECLARE_GLOBAL_SIGNATURE
+#define PASS_GLOBAL_SIGNATURE engine, ___engineConfiguration, config, boardConfiguration
+#define PASS_GLOBAL_SUFFIX , PASS_GLOBAL_SIGNATURE
+#define CONFIG_ACCESS_FOR_CONFIG_HEADER_ONLY(x) ___engineConfiguration->x
+#else /* EFI_UNIT_TEST */
+#define DECLARE_GLOBAL_SIGNATURE void
+// Use this version of the macro as the suffix if method has other parameters
+#define DECLARE_GLOBAL_SUFFIX
+// Pass this if only magic references are needed
+#define PASS_GLOBAL_SIGNATURE
+// Pass this after some other parameters are passed
+#define PASS_GLOBAL_SUFFIX
+#define CONFIG_ACCESS_FOR_CONFIG_HEADER_ONLY(x) persistentState.persistentConfiguration.engineConfiguration.x
+#endif /* EFI_UNIT_TEST */
+
+#define get_operationMode CONFIG_ACCESS_FOR_CONFIG_HEADER_ONLY(operationMode)
+
+#endif /* CONTROLLERS_MATH_CONFIG_ENGINE_SPECS_H_ */
diff --git a/firmware/controllers/math/engine_math.cpp b/firmware/controllers/math/engine_math.cpp
index 5913241679..c450110f78 100644
--- a/firmware/controllers/math/engine_math.cpp
+++ b/firmware/controllers/math/engine_math.cpp
@@ -28,12 +28,13 @@
 #include "efiGpio.h"
 #include "fuel_math.h"
 #include "advance_map.h"
+#include "config_engine_specs.h"
 
 EXTERN_ENGINE
 ;
 
-floatms_t getEngineCycleDuration(int rpm DECLARE_ENGINE_PARAMETER_SUFFIX) {
-	return getCrankshaftRevolutionTimeMs(rpm) * (engineConfiguration->operationMode == TWO_STROKE ? 1 : 2);
+floatms_t getEngineCycleDuration(int rpm DECLARE_GLOBAL_SUFFIX) {
+	return getCrankshaftRevolutionTimeMs(rpm) * (get_operationMode == TWO_STROKE ? 1 : 2);
 }
 
 /**