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83 lines
2.0 KiB
C
83 lines
2.0 KiB
C
/*
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* FreeRTOS Kernel <DEVELOPMENT BRANCH>
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* license and copyright intentionally withheld to promote copying into user code.
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*/
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#include "FreeRTOS.h"
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#include "task.h"
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BaseType_t xPortStartScheduler( void )
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{
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return pdTRUE;
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}
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void vPortEndScheduler( void )
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{
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}
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StackType_t * pxPortInitialiseStack( StackType_t * pxTopOfStack,
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TaskFunction_t pxCode,
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void * pvParameters )
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{
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( void ) pxTopOfStack;
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( void ) pvParameters;
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( void ) * pxCode;
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return NULL;
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}
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void vPortYield( void )
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{
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/* Save the current Context */
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/* Switch to the highest priority task that is ready to run. */
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#if ( configNUMBER_OF_CORES == 1 )
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{
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vTaskSwitchContext();
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}
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#else
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{
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vTaskSwitchContext( portGET_CORE_ID() );
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}
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#endif
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/* Start executing the task we have just switched to. */
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}
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static void prvTickISR( void )
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{
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/* Interrupts must have been enabled for the ISR to fire, so we have to
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* save the context with interrupts enabled. */
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#if ( configNUMBER_OF_CORES == 1 )
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{
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/* Maintain the tick count. */
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if( xTaskIncrementTick() != pdFALSE )
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{
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/* Switch to the highest priority task that is ready to run. */
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vTaskSwitchContext();
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}
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}
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#else
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{
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UBaseType_t ulPreviousMask;
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/* Tasks or ISRs running on other cores may still in critical section in
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* multiple cores environment. Incrementing tick needs to performed in
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* critical section. */
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ulPreviousMask = taskENTER_CRITICAL_FROM_ISR();
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/* Maintain the tick count. */
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if( xTaskIncrementTick() != pdFALSE )
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{
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/* Switch to the highest priority task that is ready to run. */
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vTaskSwitchContext( portGET_CORE_ID() );
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}
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taskEXIT_CRITICAL_FROM_ISR( ulPreviousMask );
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}
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#endif /* if ( configNUMBER_OF_CORES == 1 ) */
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/* start executing the new task */
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}
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