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SOFTWARE-FreeRTOS/Common/ARMv8M/tz_demo/nsc_functions.c

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+/*
+ * FreeRTOS V202212.00
+ * Copyright (C) 2020 Amazon.com, Inc. or its affiliates. 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.
+ *
+ * https://www.FreeRTOS.org
+ * https://github.com/FreeRTOS
+ *
+ */
+
+#include <arm_cmse.h>
+#include "nsc_functions.h"
+#include "secure_port_macros.h"
+
+/**
+ * @brief Counter returned from NSCFunction.
+ */
+static uint32_t ulSecureCounter = 0;
+
+/**
+ * @brief typedef for non-secure callback.
+ */
+typedef void ( *NonSecureCallback_t )( void ) __attribute__( ( cmse_nonsecure_call ) );
+/*-----------------------------------------------------------*/
+
+secureportNON_SECURE_CALLABLE uint32_t NSCFunction( Callback_t pxCallback )
+{
+    NonSecureCallback_t pxNonSecureCallback;
+
+    /* Return function pointer with cleared LSB. */
+    pxNonSecureCallback = ( NonSecureCallback_t ) cmse_nsfptr_create( pxCallback );
+
+    /* Invoke the supplied callback. */
+    pxNonSecureCallback();
+
+    /* Increment the secure side counter. */
+    ulSecureCounter += 1;
+
+    /* Return the secure side counter. */
+    return ulSecureCounter;
+}
+/*-----------------------------------------------------------*/