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-rw-r--r--tftf/tests/runtime_services/standard_service/unknown_smc.c33
1 files changed, 33 insertions, 0 deletions
diff --git a/tftf/tests/runtime_services/standard_service/unknown_smc.c b/tftf/tests/runtime_services/standard_service/unknown_smc.c
new file mode 100644
index 000000000..70175e3d1
--- /dev/null
+++ b/tftf/tests/runtime_services/standard_service/unknown_smc.c
@@ -0,0 +1,33 @@
+/*
+ * Copyright (c) 2018, Arm Limited. All rights reserved.
+ *
+ * SPDX-License-Identifier: BSD-3-Clause
+ */
+
+#include <smccc.h>
+#include <std_svc.h>
+#include <tftf_lib.h>
+#include <uuid_utils.h>
+
+/* Invalid SMC FID: chose an identifier that falls in the reserved space */
+#define INVALID_FID (0x00ff0000 | (1u << 31))
+
+/**
+ * @Test_Aim@ Force an SMC_UNKNOWN return
+ */
+test_result_t test_unknown_smc(void)
+{
+ smc_args unk_smc;
+ smc_ret_values ret;
+
+ unk_smc.arg0 = INVALID_FID;
+ ret = tftf_smc(&unk_smc);
+
+ if (ret.ret0 != SMC_UNKNOWN) {
+ tftf_testcase_printf("Expected SMC_UNKNOWN, got %ld\n",
+ (long int) ret.ret0);
+ return TEST_RESULT_FAIL;
+ }
+
+ return TEST_RESULT_SUCCESS;
+}