FreeRTOS/Source/portable/GCC/ARM_CM3_MPU/port.c

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*/

/*-----------------------------------------------------------
 * Implementation of functions defined in portable.h for the ARM CM3 port.
 *----------------------------------------------------------*/

/* Defining MPU_WRAPPERS_INCLUDED_FROM_API_FILE prevents task.h from redefining
all the API functions to use the MPU wrappers.  That should only be done when
task.h is included from an application file. */
#define MPU_WRAPPERS_INCLUDED_FROM_API_FILE

/* Scheduler includes. */
#include "FreeRTOS.h"
#include "task.h"
#include "queue.h"

#undef MPU_WRAPPERS_INCLUDED_FROM_API_FILE

/* Constants required to access and manipulate the NVIC. */
#define portNVIC_SYSTICK_CTRL					( ( volatile uint32_t * ) 0xe000e010 )
#define portNVIC_SYSTICK_LOAD					( ( volatile uint32_t * ) 0xe000e014 )
#define portNVIC_SYSPRI2						( ( volatile uint32_t * ) 0xe000ed20 )
#define portNVIC_SYSPRI1						( ( volatile uint32_t * ) 0xe000ed1c )
#define portNVIC_SYS_CTRL_STATE					( ( volatile uint32_t * ) 0xe000ed24 )
#define portNVIC_MEM_FAULT_ENABLE				( 1UL << 16UL )

/* Constants required to access and manipulate the MPU. */
#define portMPU_TYPE							( ( volatile uint32_t * ) 0xe000ed90 )
#define portMPU_REGION_BASE_ADDRESS				( ( volatile uint32_t * ) 0xe000ed9C )
#define portMPU_REGION_ATTRIBUTE				( ( volatile uint32_t * ) 0xe000edA0 )
#define portMPU_CTRL							( ( volatile uint32_t * ) 0xe000ed94 )
#define portEXPECTED_MPU_TYPE_VALUE				( 8UL << 8UL ) /* 8 regions, unified. */
#define portMPU_ENABLE							( 0x01UL )
#define portMPU_BACKGROUND_ENABLE				( 1UL << 2UL )
#define portPRIVILEGED_EXECUTION_START_ADDRESS	( 0UL )
#define portMPU_REGION_VALID					( 0x10UL )
#define portMPU_REGION_ENABLE					( 0x01UL )
#define portPERIPHERALS_START_ADDRESS			0x40000000UL
#define portPERIPHERALS_END_ADDRESS				0x5FFFFFFFUL

/* Constants required to access and manipulate the SysTick. */
#define portNVIC_SYSTICK_CLK					( 0x00000004UL )
#define portNVIC_SYSTICK_INT					( 0x00000002UL )
#define portNVIC_SYSTICK_ENABLE					( 0x00000001UL )
#define portNVIC_PENDSV_PRI						( ( ( uint32_t ) configKERNEL_INTERRUPT_PRIORITY ) << 16UL )
#define portNVIC_SYSTICK_PRI					( ( ( uint32_t ) configKERNEL_INTERRUPT_PRIORITY ) << 24UL )
#define portNVIC_SVC_PRI						( ( ( uint32_t ) configKERNEL_INTERRUPT_PRIORITY ) << 24UL )

/* Constants required to set up the initial stack. */
#define portINITIAL_XPSR						( 0x01000000 )
#define portINITIAL_CONTROL_IF_UNPRIVILEGED		( 0x03 )
#define portINITIAL_CONTROL_IF_PRIVILEGED		( 0x02 )

/* Offsets in the stack to the parameters when inside the SVC handler. */
#define portOFFSET_TO_PC						( 6 )

/* Set the privilege level to user mode if xRunningPrivileged is false. */
#define portRESET_PRIVILEGE( xRunningPrivileged ) if( xRunningPrivileged != pdTRUE ) __asm volatile ( " mrs r0, control \n orr r0, #1 \n msr control, r0" :::"r0" )

/* Each task maintains its own interrupt status in the critical nesting
variable.  Note this is not saved as part of the task context as context
switches can only occur when uxCriticalNesting is zero. */
static UBaseType_t uxCriticalNesting = 0xaaaaaaaa;

/*
 * Setup the timer to generate the tick interrupts.
 */
static void prvSetupTimerInterrupt( void ) PRIVILEGED_FUNCTION;

/*
 * Configure a number of standard MPU regions that are used by all tasks.
 */
static void prvSetupMPU( void ) PRIVILEGED_FUNCTION;

/*
 * Return the smallest MPU region size that a given number of bytes will fit
 * into.  The region size is returned as the value that should be programmed
 * into the region attribute register for that region.
 */
static uint32_t prvGetMPURegionSizeSetting( uint32_t ulActualSizeInBytes ) PRIVILEGED_FUNCTION;

/*
 * Checks to see if being called from the context of an unprivileged task, and
 * if so raises the privilege level and returns false - otherwise does nothing
 * other than return true.
 */
static BaseType_t prvRaisePrivilege( void ) __attribute__(( naked ));

/*
 * Standard FreeRTOS exception handlers.
 */
void xPortPendSVHandler( void ) __attribute__ (( naked )) PRIVILEGED_FUNCTION;
void xPortSysTickHandler( void )  __attribute__ ((optimize("3"))) PRIVILEGED_FUNCTION;
void vPortSVCHandler( void ) __attribute__ (( naked )) PRIVILEGED_FUNCTION;

/*
 * Starts the scheduler by restoring the context of the first task to run.
 */
static void prvRestoreContextOfFirstTask( void ) __attribute__(( naked )) PRIVILEGED_FUNCTION;

/*
 * C portion of the SVC handler.  The SVC handler is split between an asm entry
 * and a C wrapper for simplicity of coding and maintenance.
 */
static void prvSVCHandler( uint32_t *pulRegisters ) __attribute__(( noinline )) PRIVILEGED_FUNCTION;

/*
 * Prototypes for all the MPU wrappers.
 */
BaseType_t MPU_xTaskGenericCreate( TaskFunction_t pvTaskCode, const char * const pcName, uint16_t usStackDepth, void *pvParameters, UBaseType_t uxPriority, TaskHandle_t *pxCreatedTask, StackType_t *puxStackBuffer, const MemoryRegion_t * const xRegions );
void MPU_vTaskAllocateMPURegions( TaskHandle_t xTask, const MemoryRegion_t * const xRegions );
void MPU_vTaskDelete( TaskHandle_t pxTaskToDelete );
void MPU_vTaskDelayUntil( TickType_t * const pxPreviousWakeTime, TickType_t xTimeIncrement );
void MPU_vTaskDelay( TickType_t xTicksToDelay );
UBaseType_t MPU_uxTaskPriorityGet( TaskHandle_t pxTask );
void MPU_vTaskPrioritySet( TaskHandle_t pxTask, UBaseType_t uxNewPriority );
eTaskState MPU_eTaskGetState( TaskHandle_t pxTask );
void MPU_vTaskSuspend( TaskHandle_t pxTaskToSuspend );
void MPU_vTaskResume( TaskHandle_t pxTaskToResume );
void MPU_vTaskSuspendAll( void );
BaseType_t MPU_xTaskResumeAll( void );
TickType_t MPU_xTaskGetTickCount( void );
UBaseType_t MPU_uxTaskGetNumberOfTasks( void );
void MPU_vTaskList( char *pcWriteBuffer );
void MPU_vTaskGetRunTimeStats( char *pcWriteBuffer );
void MPU_vTaskSetApplicationTaskTag( TaskHandle_t xTask, TaskHookFunction_t pxTagValue );
TaskHookFunction_t MPU_xTaskGetApplicationTaskTag( TaskHandle_t xTask );
BaseType_t MPU_xTaskCallApplicationTaskHook( TaskHandle_t xTask, void *pvParameter );
UBaseType_t MPU_uxTaskGetStackHighWaterMark( TaskHandle_t xTask );
TaskHandle_t MPU_xTaskGetCurrentTaskHandle( void );
BaseType_t MPU_xTaskGetSchedulerState( void );
TaskHandle_t MPU_xTaskGetIdleTaskHandle( void );
UBaseType_t MPU_uxTaskGetSystemState( TaskStatus_t *pxTaskStatusArray, UBaseType_t uxArraySize, uint32_t *pulTotalRunTime );
QueueHandle_t MPU_xQueueGenericCreate( UBaseType_t uxQueueLength, UBaseType_t uxItemSize, uint8_t ucQueueType );
BaseType_t MPU_xQueueGenericSend( QueueHandle_t xQueue, const void * const pvItemToQueue, TickType_t xTicksToWait, BaseType_t xCopyPosition );
BaseType_t MPU_xQueueGenericReset( QueueHandle_t pxQueue, BaseType_t xNewQueue );
UBaseType_t MPU_uxQueueMessagesWaiting( const QueueHandle_t pxQueue );
BaseType_t MPU_xQueueGenericReceive( QueueHandle_t pxQueue, void * const pvBuffer, TickType_t xTicksToWait, BaseType_t xJustPeeking );
QueueHandle_t MPU_xQueueCreateMutex( void );
QueueHandle_t MPU_xQueueCreateCountingSemaphore( UBaseType_t uxCountValue, UBaseType_t uxInitialCount );
BaseType_t MPU_xQueueTakeMutexRecursive( QueueHandle_t xMutex, TickType_t xBlockTime );
BaseType_t MPU_xQueueGiveMutexRecursive( QueueHandle_t xMutex );
BaseType_t MPU_xQueueAltGenericSend( QueueHandle_t pxQueue, const void * const pvItemToQueue, TickType_t xTicksToWait, BaseType_t xCopyPosition );
BaseType_t MPU_xQueueAltGenericReceive( QueueHandle_t pxQueue, void * const pvBuffer, TickType_t xTicksToWait, BaseType_t xJustPeeking );
void MPU_vQueueAddToRegistry( QueueHandle_t xQueue, char *pcName );
void MPU_vQueueDelete( QueueHandle_t xQueue );
void *MPU_pvPortMalloc( size_t xSize );
void MPU_vPortFree( void *pv );
void MPU_vPortInitialiseBlocks( void );
size_t MPU_xPortGetFreeHeapSize( void );
QueueSetHandle_t MPU_xQueueCreateSet( UBaseType_t uxEventQueueLength );
QueueSetMemberHandle_t MPU_xQueueSelectFromSet( QueueSetHandle_t xQueueSet, TickType_t xBlockTimeTicks );
BaseType_t MPU_xQueueAddToSet( QueueSetMemberHandle_t xQueueOrSemaphore, QueueSetHandle_t xQueueSet );
BaseType_t MPU_xQueueRemoveFromSet( QueueSetMemberHandle_t xQueueOrSemaphore, QueueSetHandle_t xQueueSet );
BaseType_t MPU_xQueuePeekFromISR( QueueHandle_t xQueue, void * const pvBuffer );
void* MPU_xQueueGetMutexHolder( QueueHandle_t xSemaphore );

/*-----------------------------------------------------------*/

/*
 * See header file for description.
 */
StackType_t *pxPortInitialiseStack( StackType_t *pxTopOfStack, TaskFunction_t pxCode, void *pvParameters, BaseType_t xRunPrivileged )
{
	/* Simulate the stack frame as it would be created by a context switch
	interrupt. */
	pxTopOfStack--; /* Offset added to account for the way the MCU uses the stack on entry/exit of interrupts. */
	*pxTopOfStack = portINITIAL_XPSR;	/* xPSR */
	pxTopOfStack--;
	*pxTopOfStack = ( StackType_t ) pxCode;	/* PC */
	pxTopOfStack--;
	*pxTopOfStack = 0;	/* LR */
	pxTopOfStack -= 5;	/* R12, R3, R2 and R1. */
	*pxTopOfStack = ( StackType_t ) pvParameters;	/* R0 */
	pxTopOfStack -= 9;	/* R11, R10, R9, R8, R7, R6, R5 and R4. */

	if( xRunPrivileged == pdTRUE )
	{
		*pxTopOfStack = portINITIAL_CONTROL_IF_PRIVILEGED;
	}
	else
	{
		*pxTopOfStack = portINITIAL_CONTROL_IF_UNPRIVILEGED;
	}

	return pxTopOfStack;
}
/*-----------------------------------------------------------*/

void vPortSVCHandler( void )
{
	/* Assumes psp was in use. */
	__asm volatile
	(
		#ifndef USE_PROCESS_STACK	/* Code should not be required if a main() is using the process stack. */
			"	tst lr, #4						\n"
			"	ite eq							\n"
			"	mrseq r0, msp					\n"
			"	mrsne r0, psp					\n"
		#else
			"	mrs r0, psp						\n"
		#endif
			"	b %0							\n"
			::"i"(prvSVCHandler):"r0"
	);
}
/*-----------------------------------------------------------*/

static void prvSVCHandler(	uint32_t *pulParam )
{
uint8_t ucSVCNumber;

	/* The stack contains: r0, r1, r2, r3, r12, r14, the return address and
	xPSR.  The first argument (r0) is pulParam[ 0 ]. */
	ucSVCNumber = ( ( uint8_t * ) pulParam[ portOFFSET_TO_PC ] )[ -2 ];
	switch( ucSVCNumber )
	{
		case portSVC_START_SCHEDULER	:	*(portNVIC_SYSPRI1) |= portNVIC_SVC_PRI;
											prvRestoreContextOfFirstTask();
											break;

		case portSVC_YIELD				:	*(portNVIC_INT_CTRL) = portNVIC_PENDSVSET;
											/* Barriers are normally not required
											but do ensure the code is completely
											within the specified behaviour for the
											architecture. */
											__asm volatile( "dsb" );
											__asm volatile( "isb" );

											break;

		case portSVC_RAISE_PRIVILEGE	:	__asm volatile
											(
												"	mrs r1, control		\n" /* Obtain current control value. */
												"	bic r1, #1			\n" /* Set privilege bit. */
												"	msr control, r1		\n" /* Write back new control value. */
												:::"r1"
											);
											break;

		default							:	/* Unknown SVC call. */
											break;
	}
}
/*-----------------------------------------------------------*/

static void prvRestoreContextOfFirstTask( void )
{
	__asm volatile
	(
		"	ldr r0, =0xE000ED08				\n" /* Use the NVIC offset register to locate the stack. */
		"	ldr r0, [r0]					\n"
		"	ldr r0, [r0]					\n"
		"	msr msp, r0						\n" /* Set the msp back to the start of the stack. */
		"	ldr	r3, pxCurrentTCBConst2		\n" /* Restore the context. */
		"	ldr r1, [r3]					\n"
		"	ldr r0, [r1]					\n" /* The first item in the TCB is the task top of stack. */
		"	add r1, r1, #4					\n" /* Move onto the second item in the TCB... */
		"	ldr r2, =0xe000ed9c				\n" /* Region Base Address register. */
		"	ldmia r1!, {r4-r11}				\n" /* Read 4 sets of MPU registers. */
		"	stmia r2!, {r4-r11}				\n" /* Write 4 sets of MPU registers. */
		"	ldmia r0!, {r3, r4-r11}			\n" /* Pop the registers that are not automatically saved on exception entry. */
		"	msr control, r3					\n"
		"	msr psp, r0						\n" /* Restore the task stack pointer. */
		"	mov r0, #0						\n"
		"	msr	basepri, r0					\n"
		"	ldr r14, =0xfffffffd			\n" /* Load exec return code. */
		"	bx r14							\n"
		"									\n"
		"	.align 2						\n"
		"pxCurrentTCBConst2: .word pxCurrentTCB	\n"
	);
}
/*-----------------------------------------------------------*/

/*
 * See header file for description.
 */
BaseType_t xPortStartScheduler( void )
{
	/* configMAX_SYSCALL_INTERRUPT_PRIORITY must not be set to 0.  See
	http://www.FreeRTOS.org/RTOS-Cortex-M3-M4.html */
	configASSERT( ( configMAX_SYSCALL_INTERRUPT_PRIORITY ) );

	/* Make PendSV and SysTick the same priority as the kernel. */
	*(portNVIC_SYSPRI2) |= portNVIC_PENDSV_PRI;
	*(portNVIC_SYSPRI2) |= portNVIC_SYSTICK_PRI;

	/* Configure the regions in the MPU that are common to all tasks. */
	prvSetupMPU();

	/* Start the timer that generates the tick ISR.  Interrupts are disabled
	here already. */
	prvSetupTimerInterrupt();

	/* Initialise the critical nesting count ready for the first task. */
	uxCriticalNesting = 0;

	/* Start the first task. */
	__asm volatile( "	svc %0			\n"
					:: "i" (portSVC_START_SCHEDULER) );

	/* Should not get here! */
	return 0;
}
/*-----------------------------------------------------------*/

void vPortEndScheduler( void )
{
	/* Not implemented in ports where there is nothing to return to.
	Artificially force an assert. */
	configASSERT( uxCriticalNesting == 1000UL );
}
/*-----------------------------------------------------------*/

void vPortEnterCritical( void )
{
BaseType_t xRunningPrivileged = prvRaisePrivilege();

	portDISABLE_INTERRUPTS();
	uxCriticalNesting++;

	portRESET_PRIVILEGE( xRunningPrivileged );
}
/*-----------------------------------------------------------*/

void vPortExitCritical( void )
{
BaseType_t xRunningPrivileged = prvRaisePrivilege();

	configASSERT( uxCriticalNesting );
	uxCriticalNesting--;
	if( uxCriticalNesting == 0 )
	{
		portENABLE_INTERRUPTS();
	}
	portRESET_PRIVILEGE( xRunningPrivileged );
}
/*-----------------------------------------------------------*/

void xPortPendSVHandler( void )
{
	/* This is a naked function. */

	__asm volatile
	(
		"	mrs r0, psp							\n"
		"										\n"
		"	ldr	r3, pxCurrentTCBConst			\n" /* Get the location of the current TCB. */
		"	ldr	r2, [r3]						\n"
		"										\n"
		"	mrs r1, control						\n"
		"	stmdb r0!, {r1, r4-r11}				\n" /* Save the remaining registers. */
		"	str r0, [r2]						\n" /* Save the new top of stack into the first member of the TCB. */
		"										\n"
		"	stmdb sp!, {r3, r14}				\n"
		"	mov r0, %0							\n"
		"	msr basepri, r0						\n"
		"	bl vTaskSwitchContext				\n"
		"	mov r0, #0							\n"
		"	msr basepri, r0						\n"
		"	ldmia sp!, {r3, r14}				\n"
		"										\n"	/* Restore the context. */
		"	ldr r1, [r3]						\n"
		"	ldr r0, [r1]						\n" /* The first item in the TCB is the task top of stack. */
		"	add r1, r1, #4						\n" /* Move onto the second item in the TCB... */
		"	ldr r2, =0xe000ed9c					\n" /* Region Base Address register. */
		"	ldmia r1!, {r4-r11}					\n" /* Read 4 sets of MPU registers. */
		"	stmia r2!, {r4-r11}					\n" /* Write 4 sets of MPU registers. */
		"	ldmia r0!, {r3, r4-r11}				\n" /* Pop the registers that are not automatically saved on exception entry. */
		"	msr control, r3						\n"
		"										\n"
		"	msr psp, r0							\n"
		"	bx r14								\n"
		"										\n"
		"	.align 2							\n"
		"pxCurrentTCBConst: .word pxCurrentTCB	\n"
		::"i"(configMAX_SYSCALL_INTERRUPT_PRIORITY)
	);
}
/*-----------------------------------------------------------*/

void xPortSysTickHandler( void )
{
uint32_t ulDummy;

	ulDummy = portSET_INTERRUPT_MASK_FROM_ISR();
	{
		/* Increment the RTOS tick. */
		if( xTaskIncrementTick() != pdFALSE )
		{
			/* Pend a context switch. */
			*(portNVIC_INT_CTRL) = portNVIC_PENDSVSET;
		}
	}
	portCLEAR_INTERRUPT_MASK_FROM_ISR( ulDummy );
}
/*-----------------------------------------------------------*/

/*
 * Setup the systick timer to generate the tick interrupts at the required
 * frequency.
 */
static void prvSetupTimerInterrupt( void )
{
	/* Configure SysTick to interrupt at the requested rate. */
	*(portNVIC_SYSTICK_LOAD) = ( configCPU_CLOCK_HZ / configTICK_RATE_HZ ) - 1UL;
	*(portNVIC_SYSTICK_CTRL) = portNVIC_SYSTICK_CLK | portNVIC_SYSTICK_INT | portNVIC_SYSTICK_ENABLE;
}
/*-----------------------------------------------------------*/

static void prvSetupMPU( void )
{
extern uint32_t __privileged_functions_end__[];
extern uint32_t __FLASH_segment_start__[];
extern uint32_t __FLASH_segment_end__[];
extern uint32_t __privileged_data_start__[];
extern uint32_t __privileged_data_end__[];

	/* Check the expected MPU is present. */
	if( *portMPU_TYPE == portEXPECTED_MPU_TYPE_VALUE )
	{
		/* First setup the entire flash for unprivileged read only access. */
        *portMPU_REGION_BASE_ADDRESS =	( ( uint32_t ) __FLASH_segment_start__ ) | /* Base address. */
										( portMPU_REGION_VALID ) |
										( portUNPRIVILEGED_FLASH_REGION );

		*portMPU_REGION_ATTRIBUTE =		( portMPU_REGION_READ_ONLY ) |
										( portMPU_REGION_CACHEABLE_BUFFERABLE ) |
										( prvGetMPURegionSizeSetting( ( uint32_t ) __FLASH_segment_end__ - ( uint32_t ) __FLASH_segment_start__ ) ) |
										( portMPU_REGION_ENABLE );

		/* Setup the first 16K for privileged only access (even though less
		than 10K is actually being used).  This is where the kernel code is
		placed. */
        *portMPU_REGION_BASE_ADDRESS =	( ( uint32_t ) __FLASH_segment_start__ ) | /* Base address. */
										( portMPU_REGION_VALID ) |
										( portPRIVILEGED_FLASH_REGION );

		*portMPU_REGION_ATTRIBUTE =		( portMPU_REGION_PRIVILEGED_READ_ONLY ) |
										( portMPU_REGION_CACHEABLE_BUFFERABLE ) |
										( prvGetMPURegionSizeSetting( ( uint32_t ) __privileged_functions_end__ - ( uint32_t ) __FLASH_segment_start__ ) ) |
										( portMPU_REGION_ENABLE );

		/* Setup the privileged data RAM region.  This is where the kernel data
		is placed. */
		*portMPU_REGION_BASE_ADDRESS =	( ( uint32_t ) __privileged_data_start__ ) | /* Base address. */
										( portMPU_REGION_VALID ) |
										( portPRIVILEGED_RAM_REGION );

		*portMPU_REGION_ATTRIBUTE =		( portMPU_REGION_PRIVILEGED_READ_WRITE ) |
										( portMPU_REGION_CACHEABLE_BUFFERABLE ) |
										prvGetMPURegionSizeSetting( ( uint32_t ) __privileged_data_end__ - ( uint32_t ) __privileged_data_start__ ) |
										( portMPU_REGION_ENABLE );

		/* By default allow everything to access the general peripherals.  The
		system peripherals and registers are protected. */
		*portMPU_REGION_BASE_ADDRESS =	( portPERIPHERALS_START_ADDRESS ) |
										( portMPU_REGION_VALID ) |
										( portGENERAL_PERIPHERALS_REGION );

		*portMPU_REGION_ATTRIBUTE =		( portMPU_REGION_READ_WRITE | portMPU_REGION_EXECUTE_NEVER ) |
										( prvGetMPURegionSizeSetting( portPERIPHERALS_END_ADDRESS - portPERIPHERALS_START_ADDRESS ) ) |
										( portMPU_REGION_ENABLE );

		/* Enable the memory fault exception. */
		*portNVIC_SYS_CTRL_STATE |= portNVIC_MEM_FAULT_ENABLE;

		/* Enable the MPU with the background region configured. */
		*portMPU_CTRL |= ( portMPU_ENABLE | portMPU_BACKGROUND_ENABLE );
	}
}
/*-----------------------------------------------------------*/

static uint32_t prvGetMPURegionSizeSetting( uint32_t ulActualSizeInBytes )
{
uint32_t ulRegionSize, ulReturnValue = 4;

	/* 32 is the smallest region size, 31 is the largest valid value for
	ulReturnValue. */
	for( ulRegionSize = 32UL; ulReturnValue < 31UL; ( ulRegionSize <<= 1UL ) )
	{
		if( ulActualSizeInBytes <= ulRegionSize )
		{
			break;
		}
		else
		{
			ulReturnValue++;
		}
	}

	/* Shift the code by one before returning so it can be written directly
	into the the correct bit position of the attribute register. */
	return ( ulReturnValue << 1UL );
}
/*-----------------------------------------------------------*/

static BaseType_t prvRaisePrivilege( void )
{
	__asm volatile
	(
		"	mrs r0, control						\n"
		"	tst r0, #1							\n" /* Is the task running privileged? */
		"	itte ne								\n"
		"	movne r0, #0						\n" /* CONTROL[0]!=0, return false. */
		"	svcne %0							\n" /* Switch to privileged. */
		"	moveq r0, #1						\n" /* CONTROL[0]==0, return true. */
		"	bx lr								\n"
		:: "i" (portSVC_RAISE_PRIVILEGE) : "r0"
	);

	return 0;
}
/*-----------------------------------------------------------*/

void vPortStoreTaskMPUSettings( xMPU_SETTINGS *xMPUSettings, const struct xMEMORY_REGION * const xRegions, StackType_t *pxBottomOfStack, uint16_t usStackDepth )
{
extern uint32_t __SRAM_segment_start__[];
extern uint32_t __SRAM_segment_end__[];
extern uint32_t __privileged_data_start__[];
extern uint32_t __privileged_data_end__[];
int32_t lIndex;
uint32_t ul;

	if( xRegions == NULL )
	{
		/* No MPU regions are specified so allow access to all RAM. */
        xMPUSettings->xRegion[ 0 ].ulRegionBaseAddress =
				( ( uint32_t ) __SRAM_segment_start__ ) | /* Base address. */
				( portMPU_REGION_VALID ) |
				( portSTACK_REGION );

		xMPUSettings->xRegion[ 0 ].ulRegionAttribute =
				( portMPU_REGION_READ_WRITE ) |
				( portMPU_REGION_CACHEABLE_BUFFERABLE ) |
				( prvGetMPURegionSizeSetting( ( uint32_t ) __SRAM_segment_end__ - ( uint32_t ) __SRAM_segment_start__ ) ) |
				( portMPU_REGION_ENABLE );

		/* Re-instate the privileged only RAM region as xRegion[ 0 ] will have
		just removed the privileged only parameters. */
		xMPUSettings->xRegion[ 1 ].ulRegionBaseAddress =
				( ( uint32_t ) __privileged_data_start__ ) | /* Base address. */
				( portMPU_REGION_VALID ) |
				( portSTACK_REGION + 1 );

		xMPUSettings->xRegion[ 1 ].ulRegionAttribute =
				( portMPU_REGION_PRIVILEGED_READ_WRITE ) |
				( portMPU_REGION_CACHEABLE_BUFFERABLE ) |
				prvGetMPURegionSizeSetting( ( uint32_t ) __privileged_data_end__ - ( uint32_t ) __privileged_data_start__ ) |
				( portMPU_REGION_ENABLE );

		/* Invalidate all other regions. */
		for( ul = 2; ul <= portNUM_CONFIGURABLE_REGIONS; ul++ )
		{
			xMPUSettings->xRegion[ ul ].ulRegionBaseAddress = ( portSTACK_REGION + ul ) | portMPU_REGION_VALID;
			xMPUSettings->xRegion[ ul ].ulRegionAttribute = 0UL;
		}
	}
	else
	{
		/* This function is called automatically when the task is created - in
		which case the stack region parameters will be valid.  At all other
		times the stack parameters will not be valid and it is assumed that the
		stack region has already been configured. */
		if( usStackDepth > 0 )
		{
			/* Define the region that allows access to the stack. */
			xMPUSettings->xRegion[ 0 ].ulRegionBaseAddress =
					( ( uint32_t ) pxBottomOfStack ) |
					( portMPU_REGION_VALID ) |
					( portSTACK_REGION ); /* Region number. */

			xMPUSettings->xRegion[ 0 ].ulRegionAttribute =
					( portMPU_REGION_READ_WRITE ) | /* Read and write. */
					( prvGetMPURegionSizeSetting( ( uint32_t ) usStackDepth * ( uint32_t ) sizeof( StackType_t ) ) ) |
					( portMPU_REGION_CACHEABLE_BUFFERABLE ) |
					( portMPU_REGION_ENABLE );
		}

		lIndex = 0;

		for( ul = 1; ul <= portNUM_CONFIGURABLE_REGIONS; ul++ )
		{
			if( ( xRegions[ lIndex ] ).ulLengthInBytes > 0UL )
			{
				/* Translate the generic region definition contained in
				xRegions into the CM3 specific MPU settings that are then
				stored in xMPUSettings. */
				xMPUSettings->xRegion[ ul ].ulRegionBaseAddress =
						( ( uint32_t ) xRegions[ lIndex ].pvBaseAddress ) |
						( portMPU_REGION_VALID ) |
						( portSTACK_REGION + ul ); /* Region number. */

				xMPUSettings->xRegion[ ul ].ulRegionAttribute =
						( prvGetMPURegionSizeSetting( xRegions[ lIndex ].ulLengthInBytes ) ) |
						( xRegions[ lIndex ].ulParameters ) |
						( portMPU_REGION_ENABLE );
			}
			else
			{
				/* Invalidate the region. */
				xMPUSettings->xRegion[ ul ].ulRegionBaseAddress = ( portSTACK_REGION + ul ) | portMPU_REGION_VALID;
				xMPUSettings->xRegion[ ul ].ulRegionAttribute = 0UL;
			}

			lIndex++;
		}
	}
}
/*-----------------------------------------------------------*/

BaseType_t MPU_xTaskGenericCreate( TaskFunction_t pvTaskCode, const char * const pcName, uint16_t usStackDepth, void *pvParameters, UBaseType_t uxPriority, TaskHandle_t *pxCreatedTask, StackType_t *puxStackBuffer, const MemoryRegion_t * const xRegions )
{
BaseType_t xReturn;
BaseType_t xRunningPrivileged = prvRaisePrivilege();

	xReturn = xTaskGenericCreate( pvTaskCode, pcName, usStackDepth, pvParameters, uxPriority, pxCreatedTask, puxStackBuffer, xRegions );
	portRESET_PRIVILEGE( xRunningPrivileged );
	return xReturn;
}
/*-----------------------------------------------------------*/

void MPU_vTaskAllocateMPURegions( TaskHandle_t xTask, const MemoryRegion_t * const xRegions )
{
BaseType_t xRunningPrivileged = prvRaisePrivilege();

	vTaskAllocateMPURegions( xTask, xRegions );
	portRESET_PRIVILEGE( xRunningPrivileged );
}
/*-----------------------------------------------------------*/

#if ( INCLUDE_vTaskDelete == 1 )
	void MPU_vTaskDelete( TaskHandle_t pxTaskToDelete )
	{
    BaseType_t xRunningPrivileged = prvRaisePrivilege();

		vTaskDelete( pxTaskToDelete );
        portRESET_PRIVILEGE( xRunningPrivileged );
	}
#endif
/*-----------------------------------------------------------*/

#if ( INCLUDE_vTaskDelayUntil == 1 )
	void MPU_vTaskDelayUntil( TickType_t * const pxPreviousWakeTime, TickType_t xTimeIncrement )
	{
    BaseType_t xRunningPrivileged = prvRaisePrivilege();

		vTaskDelayUntil( pxPreviousWakeTime, xTimeIncrement );
        portRESET_PRIVILEGE( xRunningPrivileged );
	}
#endif
/*-----------------------------------------------------------*/

#if ( INCLUDE_vTaskDelay == 1 )
	void MPU_vTaskDelay( TickType_t xTicksToDelay )
	{
    BaseType_t xRunningPrivileged = prvRaisePrivilege();

		vTaskDelay( xTicksToDelay );
        portRESET_PRIVILEGE( xRunningPrivileged );
	}
#endif
/*-----------------------------------------------------------*/

#if ( INCLUDE_uxTaskPriorityGet == 1 )
	UBaseType_t MPU_uxTaskPriorityGet( TaskHandle_t pxTask )
	{
	UBaseType_t uxReturn;
    BaseType_t xRunningPrivileged = prvRaisePrivilege();

		uxReturn = uxTaskPriorityGet( pxTask );
        portRESET_PRIVILEGE( xRunningPrivileged );
		return uxReturn;
	}
#endif
/*-----------------------------------------------------------*/

#if ( INCLUDE_vTaskPrioritySet == 1 )
	void MPU_vTaskPrioritySet( TaskHandle_t pxTask, UBaseType_t uxNewPriority )
	{
    BaseType_t xRunningPrivileged = prvRaisePrivilege();

		vTaskPrioritySet( pxTask, uxNewPriority );
        portRESET_PRIVILEGE( xRunningPrivileged );
	}
#endif
/*-----------------------------------------------------------*/

#if ( INCLUDE_eTaskGetState == 1 )
	eTaskState MPU_eTaskGetState( TaskHandle_t pxTask )
	{
    BaseType_t xRunningPrivileged = prvRaisePrivilege();
	eTaskState eReturn;

		eReturn = eTaskGetState( pxTask );
        portRESET_PRIVILEGE( xRunningPrivileged );
		return eReturn;
	}
#endif
/*-----------------------------------------------------------*/

#if ( INCLUDE_xTaskGetIdleTaskHandle == 1 )
	TaskHandle_t MPU_xTaskGetIdleTaskHandle( void )
	{
	TaskHandle_t xReturn;
    BaseType_t xRunningPrivileged = prvRaisePrivilege();

		xReturn = xTaskGetIdleTaskHandle();
        portRESET_PRIVILEGE( xRunningPrivileged );
		return eReturn;
	}
#endif
/*-----------------------------------------------------------*/

#if ( INCLUDE_vTaskSuspend == 1 )
	void MPU_vTaskSuspend( TaskHandle_t pxTaskToSuspend )
	{
    BaseType_t xRunningPrivileged = prvRaisePrivilege();

		vTaskSuspend( pxTaskToSuspend );
        portRESET_PRIVILEGE( xRunningPrivileged );
	}
#endif
/*-----------------------------------------------------------*/

#if ( INCLUDE_vTaskSuspend == 1 )
	void MPU_vTaskResume( TaskHandle_t pxTaskToResume )
	{
    BaseType_t xRunningPrivileged = prvRaisePrivilege();

		vTaskResume( pxTaskToResume );
        portRESET_PRIVILEGE( xRunningPrivileged );
	}
#endif
/*-----------------------------------------------------------*/

void MPU_vTaskSuspendAll( void )
{
BaseType_t xRunningPrivileged = prvRaisePrivilege();

	vTaskSuspendAll();
    portRESET_PRIVILEGE( xRunningPrivileged );
}
/*-----------------------------------------------------------*/

BaseType_t MPU_xTaskResumeAll( void )
{
BaseType_t xReturn;
BaseType_t xRunningPrivileged = prvRaisePrivilege();

	xReturn = xTaskResumeAll();
    portRESET_PRIVILEGE( xRunningPrivileged );
    return xReturn;
}
/*-----------------------------------------------------------*/

TickType_t MPU_xTaskGetTickCount( void )
{
TickType_t xReturn;
BaseType_t xRunningPrivileged = prvRaisePrivilege();

	xReturn = xTaskGetTickCount();
    portRESET_PRIVILEGE( xRunningPrivileged );
	return xReturn;
}
/*-----------------------------------------------------------*/

UBaseType_t MPU_uxTaskGetNumberOfTasks( void )
{
UBaseType_t uxReturn;
BaseType_t xRunningPrivileged = prvRaisePrivilege();

	uxReturn = uxTaskGetNumberOfTasks();
    portRESET_PRIVILEGE( xRunningPrivileged );
	return uxReturn;
}
/*-----------------------------------------------------------*/

#if ( configUSE_TRACE_FACILITY == 1 )
	void MPU_vTaskList( char *pcWriteBuffer )
	{
	BaseType_t xRunningPrivileged = prvRaisePrivilege();

		vTaskList( pcWriteBuffer );
		portRESET_PRIVILEGE( xRunningPrivileged );
	}
#endif
/*-----------------------------------------------------------*/

#if ( configGENERATE_RUN_TIME_STATS == 1 )
	void MPU_vTaskGetRunTimeStats( char *pcWriteBuffer )
	{
    BaseType_t xRunningPrivileged = prvRaisePrivilege();

		vTaskGetRunTimeStats( pcWriteBuffer );
        portRESET_PRIVILEGE( xRunningPrivileged );
	}
#endif
/*-----------------------------------------------------------*/

#if ( configUSE_APPLICATION_TASK_TAG == 1 )
	void MPU_vTaskSetApplicationTaskTag( TaskHandle_t xTask, TaskHookFunction_t pxTagValue )
	{
    BaseType_t xRunningPrivileged = prvRaisePrivilege();

		vTaskSetApplicationTaskTag( xTask, pxTagValue );
        portRESET_PRIVILEGE( xRunningPrivileged );
	}
#endif
/*-----------------------------------------------------------*/

#if ( configUSE_APPLICATION_TASK_TAG == 1 )
	TaskHookFunction_t MPU_xTaskGetApplicationTaskTag( TaskHandle_t xTask )
	{
	TaskHookFunction_t xReturn;
    BaseType_t xRunningPrivileged = prvRaisePrivilege();

		xReturn = xTaskGetApplicationTaskTag( xTask );
        portRESET_PRIVILEGE( xRunningPrivileged );
		return xReturn;
	}
#endif
/*-----------------------------------------------------------*/

#if ( configUSE_APPLICATION_TASK_TAG == 1 )
	BaseType_t MPU_xTaskCallApplicationTaskHook( TaskHandle_t xTask, void *pvParameter )
	{
	BaseType_t xReturn;
    BaseType_t xRunningPrivileged = prvRaisePrivilege();

		xReturn = xTaskCallApplicationTaskHook( xTask, pvParameter );
        portRESET_PRIVILEGE( xRunningPrivileged );
		return xReturn;
	}
#endif
/*-----------------------------------------------------------*/

#if ( configUSE_TRACE_FACILITY == 1 )
	UBaseType_t MPU_uxTaskGetSystemState( TaskStatus_t *pxTaskStatusArray, UBaseType_t uxArraySize, uint32_t *pulTotalRunTime )
	{
	UBaseType_t uxReturn;
	BaseType_t xRunningPrivileged = prvRaisePrivilege();

		uxReturn = uxTaskGetSystemState( pxTaskStatusArray, uxArraySize, pulTotalRunTime );
		portRESET_PRIVILEGE( xRunningPrivileged );
		return xReturn;
	}
#endif
/*-----------------------------------------------------------*/

#if ( INCLUDE_uxTaskGetStackHighWaterMark == 1 )
	UBaseType_t MPU_uxTaskGetStackHighWaterMark( TaskHandle_t xTask )
	{
	UBaseType_t uxReturn;
    BaseType_t xRunningPrivileged = prvRaisePrivilege();

		uxReturn = uxTaskGetStackHighWaterMark( xTask );
        portRESET_PRIVILEGE( xRunningPrivileged );
		return uxReturn;
	}
#endif
/*-----------------------------------------------------------*/

#if ( INCLUDE_xTaskGetCurrentTaskHandle == 1 )
	TaskHandle_t MPU_xTaskGetCurrentTaskHandle( void )
	{
	TaskHandle_t xReturn;
    BaseType_t xRunningPrivileged = prvRaisePrivilege();

		xReturn = xTaskGetCurrentTaskHandle();
        portRESET_PRIVILEGE( xRunningPrivileged );
		return xReturn;
	}
#endif
/*-----------------------------------------------------------*/

#if ( INCLUDE_xTaskGetSchedulerState == 1 )
	BaseType_t MPU_xTaskGetSchedulerState( void )
	{
	BaseType_t xReturn;
    BaseType_t xRunningPrivileged = prvRaisePrivilege();

		xReturn = xTaskGetSchedulerState();
        portRESET_PRIVILEGE( xRunningPrivileged );
		return xReturn;
	}
#endif
/*-----------------------------------------------------------*/

QueueHandle_t MPU_xQueueGenericCreate( UBaseType_t uxQueueLength, UBaseType_t uxItemSize, uint8_t ucQueueType )
{
QueueHandle_t xReturn;
BaseType_t xRunningPrivileged = prvRaisePrivilege();

	xReturn = xQueueGenericCreate( uxQueueLength, uxItemSize, ucQueueType );
	portRESET_PRIVILEGE( xRunningPrivileged );
	return xReturn;
}
/*-----------------------------------------------------------*/

BaseType_t MPU_xQueueGenericReset( QueueHandle_t pxQueue, BaseType_t xNewQueue )
{
BaseType_t xReturn;
BaseType_t xRunningPrivileged = prvRaisePrivilege();

	xReturn = xQueueGenericReset( pxQueue, xNewQueue );
	portRESET_PRIVILEGE( xRunningPrivileged );
	return xReturn;
}
/*-----------------------------------------------------------*/

BaseType_t MPU_xQueueGenericSend( QueueHandle_t xQueue, const void * const pvItemToQueue, TickType_t xTicksToWait, BaseType_t xCopyPosition )
{
BaseType_t xReturn;
BaseType_t xRunningPrivileged = prvRaisePrivilege();

	xReturn = xQueueGenericSend( xQueue, pvItemToQueue, xTicksToWait, xCopyPosition );
	portRESET_PRIVILEGE( xRunningPrivileged );
	return xReturn;
}
/*-----------------------------------------------------------*/

UBaseType_t MPU_uxQueueMessagesWaiting( const QueueHandle_t pxQueue )
{
BaseType_t xRunningPrivileged = prvRaisePrivilege();
UBaseType_t uxReturn;

	uxReturn = uxQueueMessagesWaiting( pxQueue );
	portRESET_PRIVILEGE( xRunningPrivileged );
	return uxReturn;
}
/*-----------------------------------------------------------*/

BaseType_t MPU_xQueueGenericReceive( QueueHandle_t pxQueue, void * const pvBuffer, TickType_t xTicksToWait, BaseType_t xJustPeeking )
{
BaseType_t xRunningPrivileged = prvRaisePrivilege();
BaseType_t xReturn;

	xReturn = xQueueGenericReceive( pxQueue, pvBuffer, xTicksToWait, xJustPeeking );
	portRESET_PRIVILEGE( xRunningPrivileged );
	return xReturn;
}
/*-----------------------------------------------------------*/

BaseType_t MPU_xQueuePeekFromISR( QueueHandle_t pxQueue, void * const pvBuffer )
{
BaseType_t xRunningPrivileged = prvRaisePrivilege();
BaseType_t xReturn;

	xReturn = xQueuePeekFromISR( pxQueue, pvBuffer );
	portRESET_PRIVILEGE( xRunningPrivileged );
	return xReturn;
}
/*-----------------------------------------------------------*/

void* MPU_xQueueGetMutexHolder( QueueHandle_t xSemaphore )
{
BaseType_t xRunningPrivileged = prvRaisePrivilege();
void * xReturn;

	xReturn = ( void * ) xQueueGetMutexHolder( xSemaphore );
	portRESET_PRIVILEGE( xRunningPrivileged );
	return xReturn;
}
/*-----------------------------------------------------------*/

#if ( configUSE_MUTEXES == 1 )
	QueueHandle_t MPU_xQueueCreateMutex( void )
	{
    QueueHandle_t xReturn;
	BaseType_t xRunningPrivileged = prvRaisePrivilege();

		xReturn = xQueueCreateMutex( queueQUEUE_TYPE_MUTEX );
		portRESET_PRIVILEGE( xRunningPrivileged );
		return xReturn;
	}
#endif
/*-----------------------------------------------------------*/

#if configUSE_COUNTING_SEMAPHORES == 1
	QueueHandle_t MPU_xQueueCreateCountingSemaphore( UBaseType_t uxCountValue, UBaseType_t uxInitialCount )
	{
    QueueHandle_t xReturn;
	BaseType_t xRunningPrivileged = prvRaisePrivilege();

		xReturn = xQueueCreateCountingSemaphore( uxCountValue, uxInitialCount );
		portRESET_PRIVILEGE( xRunningPrivileged );
		return xReturn;
	}
#endif
/*-----------------------------------------------------------*/

#if ( configUSE_MUTEXES == 1 )
	BaseType_t MPU_xQueueTakeMutexRecursive( QueueHandle_t xMutex, TickType_t xBlockTime )
	{
	BaseType_t xReturn;
	BaseType_t xRunningPrivileged = prvRaisePrivilege();

		xReturn = xQueueTakeMutexRecursive( xMutex, xBlockTime );
		portRESET_PRIVILEGE( xRunningPrivileged );
		return xReturn;
	}
#endif
/*-----------------------------------------------------------*/

#if ( configUSE_MUTEXES == 1 )
	BaseType_t MPU_xQueueGiveMutexRecursive( QueueHandle_t xMutex )
	{
	BaseType_t xReturn;
	BaseType_t xRunningPrivileged = prvRaisePrivilege();

		xReturn = xQueueGiveMutexRecursive( xMutex );
		portRESET_PRIVILEGE( xRunningPrivileged );
		return xReturn;
	}
#endif
/*-----------------------------------------------------------*/

#if ( configUSE_QUEUE_SETS == 1 )
	QueueSetHandle_t MPU_xQueueCreateSet( UBaseType_t uxEventQueueLength )
	{
	QueueSetHandle_t xReturn;
	BaseType_t xRunningPrivileged = prvRaisePrivilege();

		xReturn = xQueueCreateSet( uxEventQueueLength );
		portRESET_PRIVILEGE( xRunningPrivileged );
		return xReturn;
	}
#endif
/*-----------------------------------------------------------*/

#if ( configUSE_QUEUE_SETS == 1 )
	QueueSetMemberHandle_t MPU_xQueueSelectFromSet( QueueSetHandle_t xQueueSet, TickType_t xBlockTimeTicks )
	{
	QueueSetMemberHandle_t xReturn;
	BaseType_t xRunningPrivileged = prvRaisePrivilege();

		xReturn = xQueueSelectFromSet( xQueueSet, xBlockTimeTicks );
		portRESET_PRIVILEGE( xRunningPrivileged );
		return xReturn;
	}
#endif
/*-----------------------------------------------------------*/

#if ( configUSE_QUEUE_SETS == 1 )
	BaseType_t MPU_xQueueAddToSet( QueueSetMemberHandle_t xQueueOrSemaphore, QueueSetHandle_t xQueueSet )
	{
	BaseType_t xReturn;
	BaseType_t xRunningPrivileged = prvRaisePrivilege();

		xReturn = xQueueAddToSet( xQueueOrSemaphore, xQueueSet );
		portRESET_PRIVILEGE( xRunningPrivileged );
		return xReturn;
	}
#endif
/*-----------------------------------------------------------*/

#if ( configUSE_QUEUE_SETS == 1 )
	BaseType_t MPU_xQueueRemoveFromSet( QueueSetMemberHandle_t xQueueOrSemaphore, QueueSetHandle_t xQueueSet )
	{
	BaseType_t xReturn;
	BaseType_t xRunningPrivileged = prvRaisePrivilege();

		xReturn = xQueueRemoveFromSet( xQueueOrSemaphore, xQueueSet );
		portRESET_PRIVILEGE( xRunningPrivileged );
		return xReturn;
	}
#endif
/*-----------------------------------------------------------*/

#if configUSE_ALTERNATIVE_API == 1
	BaseType_t MPU_xQueueAltGenericSend( QueueHandle_t pxQueue, const void * const pvItemToQueue, TickType_t xTicksToWait, BaseType_t xCopyPosition )
	{
   	BaseType_t xReturn;
	BaseType_t xRunningPrivileged = prvRaisePrivilege();

		xReturn = 	BaseType_t xQueueAltGenericSend( pxQueue, pvItemToQueue, xTicksToWait, xCopyPosition );
		portRESET_PRIVILEGE( xRunningPrivileged );
		return xReturn;
	}
#endif
/*-----------------------------------------------------------*/

#if configUSE_ALTERNATIVE_API == 1
	BaseType_t MPU_xQueueAltGenericReceive( QueueHandle_t pxQueue, void * const pvBuffer, TickType_t xTicksToWait, BaseType_t xJustPeeking )
	{
    BaseType_t xReturn;
	BaseType_t xRunningPrivileged = prvRaisePrivilege();

		xReturn = xQueueAltGenericReceive( pxQueue, pvBuffer, xTicksToWait, xJustPeeking );
		portRESET_PRIVILEGE( xRunningPrivileged );
		return xReturn;
	}
#endif
/*-----------------------------------------------------------*/

#if configQUEUE_REGISTRY_SIZE > 0
	void MPU_vQueueAddToRegistry( QueueHandle_t xQueue, char *pcName )
	{
	BaseType_t xRunningPrivileged = prvRaisePrivilege();

		vQueueAddToRegistry( xQueue, pcName );

		portRESET_PRIVILEGE( xRunningPrivileged );
	}
#endif
/*-----------------------------------------------------------*/

void MPU_vQueueDelete( QueueHandle_t xQueue )
{
BaseType_t xRunningPrivileged = prvRaisePrivilege();

	vQueueDelete( xQueue );

	portRESET_PRIVILEGE( xRunningPrivileged );
}
/*-----------------------------------------------------------*/

void *MPU_pvPortMalloc( size_t xSize )
{
void *pvReturn;
BaseType_t xRunningPrivileged = prvRaisePrivilege();

	pvReturn = pvPortMalloc( xSize );

	portRESET_PRIVILEGE( xRunningPrivileged );

	return pvReturn;
}
/*-----------------------------------------------------------*/

void MPU_vPortFree( void *pv )
{
BaseType_t xRunningPrivileged = prvRaisePrivilege();

	vPortFree( pv );

	portRESET_PRIVILEGE( xRunningPrivileged );
}
/*-----------------------------------------------------------*/

void MPU_vPortInitialiseBlocks( void )
{
BaseType_t xRunningPrivileged = prvRaisePrivilege();

	vPortInitialiseBlocks();

	portRESET_PRIVILEGE( xRunningPrivileged );
}
/*-----------------------------------------------------------*/

size_t MPU_xPortGetFreeHeapSize( void )
{
size_t xReturn;
BaseType_t xRunningPrivileged = prvRaisePrivilege();

	xReturn = xPortGetFreeHeapSize();

	portRESET_PRIVILEGE( xRunningPrivileged );

	return xReturn;
}

/* Functions that the application writer wants to execute in privileged mode
can be defined in application_defined_privileged_functions.h.  The functions
must take the same format as those above whereby the privilege state on exit
equals the privilege state on entry.  For example:

void MPU_FunctionName( [parameters ] )
{
BaseType_t xRunningPrivileged = prvRaisePrivilege();

	FunctionName( [parameters ] );

	portRESET_PRIVILEGE( xRunningPrivileged );
}
*/

#if configINCLUDE_APPLICATION_DEFINED_PRIVILEGED_FUNCTIONS == 1
	#include "application_defined_privileged_functions.h"
#endif