FreeRTOS/Demo/Common/ARMv8M/tz_demo/nsc_functions.c

/*
 * FreeRTOS Kernel V10.3.0
 * 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.
 *
 * http://www.FreeRTOS.org
 * http://aws.amazon.com/freertos
 *
 * 1 tab == 4 spaces!
 */

#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;
}
/*-----------------------------------------------------------*/