1 files changed, 78 insertions, 0 deletions
diff --git a/FreeRTOS/Demo/CORTEX_MPU_M33F_NXP_LPC55S69_MCUXpresso/NSC_Functions/nsc_printf.c b/FreeRTOS/Demo/CORTEX_MPU_M33F_NXP_LPC55S69_MCUXpresso/NSC_Functions/nsc_printf.c
new file mode 100644
index 000000000..d3d04719f
--- /dev/null
+++ b/FreeRTOS/Demo/CORTEX_MPU_M33F_NXP_LPC55S69_MCUXpresso/NSC_Functions/nsc_printf.c
@@ -0,0 +1,78 @@
+/*
+ * 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
+ *
+ */
+
+/* ARM includes. */
+#include <arm_cmse.h>
+
+/* Interface includes. */
+#include "nsc_printf.h"
+
+/* FreeRTOS includes. */
+#include "secure_port_macros.h"
+
+/* Device includes. */
+#include "fsl_debug_console.h"
+/*-----------------------------------------------------------*/
+
+/* Maximum length of the string that the non-secure code
+ * can print. */
+#define MAX_ALLOWED_STRING_LENGTH   0x400
+/*-----------------------------------------------------------*/
+
+secureportNON_SECURE_CALLABLE void NSC_Printf( char const *str )
+{
+    uint32_t isInvalidSting = 0;
+    size_t stringLength;
+
+    /* Check whether the string is null terminated. */
+    stringLength = strnlen( str, MAX_ALLOWED_STRING_LENGTH );
+
+    if( ( stringLength == MAX_ALLOWED_STRING_LENGTH ) &&
+        ( str[ stringLength ] != '\0') )
+    {
+        PRINTF( "[ERROR] [NSC_Printf] String too long or not null terminated!\r\n" );
+        isInvalidSting = 1;
+    }
+
+    if( isInvalidSting == 0 )
+    {
+        /* Check whether the string is located in non-secure memory. */
+        if( cmse_check_address_range( ( void * ) str,
+                                      stringLength,
+                                      ( CMSE_NONSECURE | CMSE_MPU_READ ) ) == NULL )
+        {
+            PRINTF( "[ERROR] [NSC_Printf] String is not located in non-secure memory!\r\n" );
+            isInvalidSting = 1;
+        }
+    }
+
+    /* Print the string if it is a valid string. */
+    if( isInvalidSting == 0 )
+    {
+        PRINTF( str );
+    }
+}
+/*-----------------------------------------------------------*/