portable.h File Reference

#include "portmacro.h"
#include "mpu_wrappers.h"

Go to the source code of this file.

Defines
#define	portNUM_CONFIGURABLE_REGIONS   1
Functions
void *	pvPortMalloc (size_t xSize) PRIVILEGED_FUNCTION
portSTACK_TYPE *	pxPortInitialiseStack (portSTACK_TYPE *pxTopOfStack, pdTASK_CODE pxCode, void *pvParameters)
void	vPortEndScheduler (void) PRIVILEGED_FUNCTION
void	vPortFree (void *pv) PRIVILEGED_FUNCTION
void	vPortInitialiseBlocks (void) PRIVILEGED_FUNCTION
size_t	xPortGetFreeHeapSize (void) PRIVILEGED_FUNCTION
portBASE_TYPE	xPortStartScheduler (void) PRIVILEGED_FUNCTION

---

Define Documentation

#define portNUM_CONFIGURABLE_REGIONS   1

Definition at line 331 of file portable.h.

---

Function Documentation

void* pvPortMalloc

(

size_t

xSize

)

Definition at line 89 of file heap_1.c.

References configTOTAL_HEAP_SIZE, heapMINIMUM_BLOCK_SIZE, heapSTRUCT_SIZE, pdFALSE, pdTRUE, portBASE_TYPE, portBYTE_ALIGNMENT, prvHeapInit, prvInsertBlockIntoFreeList, A_BLOCK_LINK::pxNextFreeBlock, xRTOS_HEAP::ucHeap, vTaskSuspendAll(), A_BLOCK_LINK::xBlockSize, xHeap, xNextFreeByte, and xTaskResumeAll().

Referenced by portTASK_FUNCTION(), prvAllocateTCBAndStack(), vCreateSuicidalTasks(), vMemCheckTask(), vStartAltBlockingQueueTasks(), vStartBlockingQueueTasks(), vStartSemaphoreTasks(), and xCoRoutineCreate().

{
void *pvReturn = NULL; 

    /* Ensure that blocks are always aligned to the required number of bytes. */
    #if portBYTE_ALIGNMENT != 1
        if( xWantedSize & portBYTE_ALIGNMENT_MASK )
        {
            /* Byte alignment required. */
            xWantedSize += ( portBYTE_ALIGNMENT - ( xWantedSize & portBYTE_ALIGNMENT_MASK ) );
        }
    #endif

    vTaskSuspendAll();
    {
        /* Check there is enough room left for the allocation. */
        if( ( ( xNextFreeByte + xWantedSize ) < configTOTAL_HEAP_SIZE ) &&
            ( ( xNextFreeByte + xWantedSize ) > xNextFreeByte ) )/* Check for overflow. */
        {
            /* Return the next free byte then increment the index past this
            block. */
            pvReturn = &( xHeap.ucHeap[ xNextFreeByte ] );
            xNextFreeByte += xWantedSize;           
        }   
    }
    xTaskResumeAll();
    
    #if( configUSE_MALLOC_FAILED_HOOK == 1 )
    {
        if( pvReturn == NULL )
        {
            extern void vApplicationMallocFailedHook( void );
            vApplicationMallocFailedHook();
        }
    }
    #endif  

    return pvReturn;
}

portSTACK_TYPE* pxPortInitialiseStack	(	portSTACK_TYPE *	pxTopOfStack,
		pdTASK_CODE	pxCode,
		void *	pvParameters
	)

Definition at line 294 of file GCC/AVR32_UC3/port.c.

References portINITIAL_SR, portINSTRUCTION_SIZE, portNO_CRITICAL_NESTING, and portSTACK_TYPE.

Referenced by prvInitialiseTaskLists().

{
    /* Setup the initial stack of the task.  The stack is set exactly as
    expected by the portRESTORE_CONTEXT() macro. */

    /* When the task starts, it will expect to find the function parameter in R12. */
    pxTopOfStack--;
    *pxTopOfStack-- = ( portSTACK_TYPE ) 0x08080808;                    /* R8 */
    *pxTopOfStack-- = ( portSTACK_TYPE ) 0x09090909;                    /* R9 */
    *pxTopOfStack-- = ( portSTACK_TYPE ) 0x0A0A0A0A;                    /* R10 */
    *pxTopOfStack-- = ( portSTACK_TYPE ) 0x0B0B0B0B;                    /* R11 */
    *pxTopOfStack-- = ( portSTACK_TYPE ) pvParameters;                  /* R12 */
    *pxTopOfStack-- = ( portSTACK_TYPE ) 0xDEADBEEF;                    /* R14/LR */
    *pxTopOfStack-- = ( portSTACK_TYPE ) pxCode + portINSTRUCTION_SIZE; /* R15/PC */
    *pxTopOfStack-- = ( portSTACK_TYPE ) portINITIAL_SR;                /* SR */
    *pxTopOfStack-- = ( portSTACK_TYPE ) 0xFF0000FF;                    /* R0 */
    *pxTopOfStack-- = ( portSTACK_TYPE ) 0x01010101;                    /* R1 */
    *pxTopOfStack-- = ( portSTACK_TYPE ) 0x02020202;                    /* R2 */
    *pxTopOfStack-- = ( portSTACK_TYPE ) 0x03030303;                    /* R3 */
    *pxTopOfStack-- = ( portSTACK_TYPE ) 0x04040404;                    /* R4 */
    *pxTopOfStack-- = ( portSTACK_TYPE ) 0x05050505;                    /* R5 */
    *pxTopOfStack-- = ( portSTACK_TYPE ) 0x06060606;                    /* R6 */
    *pxTopOfStack-- = ( portSTACK_TYPE ) 0x07070707;                    /* R7 */
    *pxTopOfStack = ( portSTACK_TYPE ) portNO_CRITICAL_NESTING;         /* ulCriticalNesting */

    return pxTopOfStack;
}

void vPortEndScheduler

(

void

)

Definition at line 337 of file GCC/AVR32_UC3/port.c.

Referenced by vTaskEndScheduler().

{
    /* It is unlikely that the AVR32 port will require this function as there
    is nothing to return to.  */
}

void vPortFree

(

void *

pv

)

Definition at line 130 of file heap_1.c.

References heapSTRUCT_SIZE, prvInsertBlockIntoFreeList, vTaskSuspendAll(), A_BLOCK_LINK::xBlockSize, and xTaskResumeAll().

Referenced by portTASK_FUNCTION(), prvAllocateTCBAndStack(), vMemCheckTask(), and vQueueDelete().

{
    /* Memory cannot be freed using this scheme.  See heap_2.c and heap_3.c 
    for alternative implementations, and the memory management pages of 
    http://www.FreeRTOS.org for more information. */
    ( void ) pv;
}

void vPortInitialiseBlocks

(

void

)

Definition at line 139 of file heap_1.c.

References xNextFreeByte.

{
    /* Only required when static memory is not cleared. */
    xNextFreeByte = ( size_t ) 0;
}

size_t xPortGetFreeHeapSize

(

void

)

Definition at line 146 of file heap_1.c.

References configTOTAL_HEAP_SIZE, and xNextFreeByte.

{
    return ( configTOTAL_HEAP_SIZE - xNextFreeByte );
}

portBASE_TYPE xPortStartScheduler

(

void

)

Definition at line 323 of file GCC/AVR32_UC3/port.c.

References portRESTORE_CONTEXT, and prvSetupTimerInterrupt().

Referenced by vTaskStartScheduler().

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

    /* Start the first task. */
    portRESTORE_CONTEXT();

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