From b107ffe10f9c4a1c7ecd5faf4ecd72cd5d3c82c6 Mon Sep 17 00:00:00 2001
From: richardbarry <richardbarry@1d2547de-c912-0410-9cb9-b8ca96c0e9e2>
Date: Fri, 28 Nov 2008 16:08:59 +0000
Subject: Continued work in progress on new demo.

git-svn-id: https://freertos.svn.sourceforge.net/svnroot/freertos/trunk@591 1d2547de-c912-0410-9cb9-b8ca96c0e9e2
---
 Source/portable/IAR/AtmelSAM9XE/port.c      | 59 ++++++++++++-----------------
 Source/portable/IAR/AtmelSAM9XE/portasm.s79 | 24 ------------
 2 files changed, 24 insertions(+), 59 deletions(-)

(limited to 'Source/portable')

diff --git a/Source/portable/IAR/AtmelSAM9XE/port.c b/Source/portable/IAR/AtmelSAM9XE/port.c
index 0004c97b..32eef0e7 100644
--- a/Source/portable/IAR/AtmelSAM9XE/port.c
+++ b/Source/portable/IAR/AtmelSAM9XE/port.c
@@ -91,6 +91,9 @@
 /* Setup the PIT to generate the tick interrupts. */
 static void prvSetupTimerInterrupt( void );
 
+/* The PIT interrupt handler - the RTOS tick. */
+static void vPortTickISR( void );
+
 /* ulCriticalNesting will get set to zero when the first task starts.  It
 cannot be initialised to 0 as this will cause interrupts to be enabled
 during the kernel initialisation process. */
@@ -189,34 +192,27 @@ void vPortEndScheduler( void )
 }
 /*-----------------------------------------------------------*/
 
-#if configUSE_PREEMPTION == 0
-
-	/* The cooperative scheduler requires a normal IRQ service routine to
-	simply increment the system tick. */
-	static __arm __irq void vPortNonPreemptiveTick( void );
-	static __arm __irq void vPortNonPreemptiveTick( void )
-	{
-		unsigned portLONG ulDummy;
-		
-		/* Increment the tick count - which may wake some tasks but as the
-		preemptive scheduler is not being used any woken task is not given
-		processor time no matter what its priority. */
-		vTaskIncrementTick();
-		
-		/* Clear the PIT interrupt. */
-		ulDummy = AT91C_BASE_PITC->PITC_PIVR;
+static __arm void vPortTickISR( void )
+{
+volatile unsigned portLONG ulDummy;
+	
+	/* Increment the tick count - which may wake some tasks but as the
+	preemptive scheduler is not being used any woken task is not given
+	processor time no matter what its priority. */
+	vTaskIncrementTick();
+
+	#if configUSE_PREEMPTION == 0
+		vTaskSwitchContext();
+	#endif	
 		
-		/* End the interrupt in the AIC. */
-		AT91C_BASE_AIC->AIC_EOICR = ulDummy;
-	}
-
-#else
-
-	/* Currently the IAR port requires the preemptive tick function to be
-	defined in an asm file. */
-
-#endif
-
+	/* Clear the PIT interrupt. */
+	ulDummy = AT91C_BASE_PITC->PITC_PIVR;
+	
+	/* To remove compiler warning. */
+	( void ) ulDummy;
+	
+	/* The AIC is cleared in the asm wrapper, outside of this function. */
+}
 /*-----------------------------------------------------------*/
 
 static void prvSetupTimerInterrupt( void )
@@ -228,14 +224,7 @@ const unsigned portLONG ulPeriodIn_uS = ( 1 / configTICK_RATE_HZ ) * port1SECOND
 	
 	/* Setup the PIT interrupt. */
 	AIC_DisableIT( AT91C_ID_SYS );
-
-	#if configUSE_PREEMPTION == 0	
-		AIC_ConfigureIT( AT91C_ID_SYS, AT91C_AIC_PRIOR_LOWEST, vPortNonPreemptiveTick );
-	#else
-		extern void ( vPortPreemptiveTick )( void );
-		AIC_ConfigureIT( AT91C_ID_SYS, AT91C_AIC_PRIOR_LOWEST, vPortPreemptiveTick );		
-	#endif
-
+	AIC_ConfigureIT( AT91C_ID_SYS, AT91C_AIC_PRIOR_LOWEST, vPortTickISR );
 	AIC_EnableIT( AT91C_ID_SYS );
 	PIT_EnableIT();
 	
diff --git a/Source/portable/IAR/AtmelSAM9XE/portasm.s79 b/Source/portable/IAR/AtmelSAM9XE/portasm.s79
index da118fb5..d5ac7eba 100644
--- a/Source/portable/IAR/AtmelSAM9XE/portasm.s79
+++ b/Source/portable/IAR/AtmelSAM9XE/portasm.s79
@@ -2,10 +2,8 @@
 		CODE32
 
 	EXTERN vTaskSwitchContext
-	EXTERN vTaskIncrementTick
 
 	PUBLIC vPortYieldProcessor
-	PUBLIC vPortPreemptiveTick
 	PUBLIC vPortStartFirstTask
 
 #include "ISR_Support.h"
@@ -31,28 +29,6 @@ vPortYieldProcessor:
 	BX R0
 	portRESTORE_CONTEXT			; Restore the context of the selected task.
 
-;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
-; Preemptive context switch function.  This will only ever get installed if
-; portUSE_PREEMPTION is set to 1 in portmacro.h.
-;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
-vPortPreemptiveTick:
-	portSAVE_CONTEXT			; Save the context of the current task.
-
-	LDR R0, =vTaskIncrementTick ; Increment the tick count - this may wake a task.
-	mov lr, pc
-	BX R0
-	LDR R0, =vTaskSwitchContext ; Select the next task to execute.
-	mov lr, pc
-	BX R0
-#if 0
-	LDR	R14, =AT91C_BASE_PITC	; Clear the PIT interrupt
-	LDR	R0, [R14, #PITC_PIVR ]
-
-	LDR R14, =AT91C_BASE_AIC	; Mark the End of Interrupt on the AIC
-    STR	R14, [R14, #AIC_EOICR]
-#endif
-	portRESTORE_CONTEXT			; Restore the context of the selected task.
-
 
 	END
 
-- 
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