tests: add critical region tests

[KRKNWK-18043]

Signed-off-by: Krzysztof Taborowski <[email protected]>

tests/functional/critical_region/CMakeLists.txt

@@ -0,0 +1,18 @@
+#
+# Copyright (c) 2022 Nordic Semiconductor ASA
+#
+# SPDX-License-Identifier: LicenseRef-Nordic-5-Clause
+#
+
+cmake_minimum_required(VERSION 3.20.0)
+
+find_package(Zephyr REQUIRED HINTS $ENV{ZEPHYR_BASE})
+project(sidewalk_test_critical_region)
+
+# add test file
+FILE(GLOB app_sources src/*.c)
+target_sources(app PRIVATE ${app_sources})
+target_include_directories(app PRIVATE .)
+
+# generate runner for the test
+test_runner_generate(${app_sources})

tests/functional/critical_region/Kconfig

@@ -0,0 +1,15 @@
+#
+# Copyright (c) 2022 Nordic Semiconductor ASA
+#
+# SPDX-License-Identifier: LicenseRef-Nordic-5-Clause
+#
+config SIDEWALK_BUILD
+	default y
+
+config SIDEWALK_CRITICAL_REGION
+	default y
+
+config SIDEWALK_CRITICAL_REGION_RE_ENTRY_MAX
+	default 2
+
+source "Kconfig.zephyr"

tests/functional/critical_region/prj.conf

@@ -0,0 +1,9 @@
+#
+# Copyright (c) 2022 Nordic Semiconductor ASA
+#
+# SPDX-License-Identifier: LicenseRef-Nordic-5-Clause
+#
+CONFIG_UNITY=y
+CONFIG_MAIN_THREAD_PRIORITY=14
+CONFIG_NO_OPTIMIZATIONS=y
+CONFIG_RESET_ON_FATAL_ERROR=n

tests/functional/critical_region/src/main.c

@@ -0,0 +1,62 @@
+/*
+ * Copyright (c) 2022 Nordic Semiconductor ASA
+ *
+ * SPDX-License-Identifier: LicenseRef-Nordic-5-Clause
+ */
+#include <unity.h>
+#include <sid_pal_critical_region_ifc.h>
+#include <sid_error.h>
+
+#if defined(CONFIG_CPU_CORTEX_M)
+#include <cmsis_core.h>
+#else
+#error "Architecture not supported"
+#endif
+
+#define TEST_IRQ (30)
+#define TEST_IRQ_PRIO (2)
+#define TEST_IRQ_FLAGS (0)
+
+#define UNCHANGED 0
+#define CHANGED 1
+static volatile int resource;
+
+static void irq_cb(void)
+{
+	resource = CHANGED;
+}
+
+static void trigger_irq(int irq)
+{
+	NVIC_SetPendingIRQ(irq);
+}
+
+void test_sid_pal_critical_region_with_timer(void)
+{
+	IRQ_CONNECT(TEST_IRQ, TEST_IRQ_PRIO, irq_cb, NULL, TEST_IRQ_FLAGS);
+	irq_enable(TEST_IRQ);
+
+	resource = UNCHANGED;
+	trigger_irq(TEST_IRQ);
+	TEST_ASSERT_EQUAL_UINT32(CHANGED, resource);
+
+	sid_pal_enter_critical_region();
+	resource = UNCHANGED;
+	trigger_irq(TEST_IRQ);
+	TEST_ASSERT_EQUAL_UINT32(UNCHANGED, resource);
+	sid_pal_exit_critical_region();
+
+	trigger_irq(TEST_IRQ);
+	TEST_ASSERT_EQUAL_UINT32(CHANGED, resource);
+}
+
+/* It is required to be added to each test. That is because unity is using
+ * different main signature (returns int) and zephyr expects main which does
+ * not return value.
+ */
+extern int unity_main(void);
+
+int main(void)
+{
+	return unity_main();
+}

tests/functional/critical_region/testcase.yaml

@@ -0,0 +1,6 @@
+tests:
+  sidewalk.functional.critical_region:
+    platform_allow: nrf52840dk_nrf52840 nrf5340dk_nrf5340_cpuapp
+    integration_platforms:
+      - nrf52840dk_nrf52840
+      - nrf5340dk_nrf5340_cpuapp