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Improve efficiency even further. Introduce the configMAX_SYSCALL_INTERRUPT_PRIORITY feature.

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This commit is contained in:
Richard Barry 2008-07-25 02:34:31 +00:00
parent 32592e1385
commit 794b6546b2
3 changed files with 39 additions and 42 deletions
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26
Source/portable/IAR/ARM_CM3/port.c
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@ -37,13 +37,13 @@
Please ensure to read the configuration and relevant port sections of the
online documentation.
http://www.FreeRTOS.org - Documentation, latest information, license and
http://www.FreeRTOS.org - Documentation, latest information, license and
contact details.
http://www.SafeRTOS.com - A version that is certified for use in safety
http://www.SafeRTOS.com - A version that is certified for use in safety
critical systems.
http://www.OpenRTOS.com - Commercial support, development, porting,
http://www.OpenRTOS.com - Commercial support, development, porting,
licensing and training services.
*/
@ -86,7 +86,7 @@ FreeRTOS.org versions prior to V4.3.0 did not include this definition. */
/* Each task maintains its own interrupt status in the critical nesting
variable. */
unsigned portBASE_TYPE uxCriticalNesting = 0xaaaaaaaa;
static unsigned portBASE_TYPE uxCriticalNesting = 0xaaaaaaaa;
/*
* Setup the timer to generate the tick interrupts.
@ -119,8 +119,7 @@ portSTACK_TYPE *pxPortInitialiseStack( portSTACK_TYPE *pxTopOfStack, pdTASK_CODE
*pxTopOfStack = 0; /* LR */
pxTopOfStack -= 5; /* R12, R3, R2 and R1. */
*pxTopOfStack = ( portSTACK_TYPE ) pvParameters; /* R0 */
pxTopOfStack -= 9; /* R11, R10, R9, R8, R7, R6, R5 and R4. */
*pxTopOfStack = 0x00000000; /* uxCriticalNesting. */
pxTopOfStack -= 8; /* R11, R10, R9, R8, R7, R6, R5 and R4. */
return pxTopOfStack;
}
@ -139,6 +138,9 @@ portBASE_TYPE xPortStartScheduler( void )
here already. */
prvSetupTimerInterrupt();
/* Initialise the critical nesting count ready for the first task. */
uxCriticalNesting = 0;
/* Start the first task. */
vPortStartFirstTask( *((unsigned portLONG *) 0 ) );
@ -158,10 +160,6 @@ void vPortYieldFromISR( void )
{
/* Set a PendSV to request a context switch. */
*(portNVIC_INT_CTRL) |= portNVIC_PENDSVSET;
/* This function is also called in response to a Yield(), so we want
the yield to occur immediately. */
portENABLE_INTERRUPTS();
}
/*-----------------------------------------------------------*/
@ -184,12 +182,18 @@ void vPortExitCritical( void )
void xPortSysTickHandler( void )
{
unsigned portLONG ulDummy;
/* If using preemption, also force a context switch. */
#if configUSE_PREEMPTION == 1
*(portNVIC_INT_CTRL) |= portNVIC_PENDSVSET;
#endif
vTaskIncrementTick();
ulDummy = portSET_INTERRUPT_MASK_FROM_ISR();
{
vTaskIncrementTick();
}
portCLEAR_INTERRUPT_MASK_FROM_ISR( ulDummy );
}
/*-----------------------------------------------------------*/