Removed unused function from IAR CM4F port.c.

Modified the stack alignment when a task first starts in the IAR CM4F port.

Source/portable/IAR/ARM_CM4F/port.c

@@ -119,7 +119,7 @@ portSTACK_TYPE *pxPortInitialiseStack( portSTACK_TYPE *pxTopOfStack, pdTASK_CODE
 	
 	/* Offset added to account for the way the MCU uses the stack on entry/exit
 	of interrupts, and to ensure alignment. */
-	pxTopOfStack -= 2;
+	pxTopOfStack--;
 		
 	*pxTopOfStack = portINITIAL_XPSR;	/* xPSR */
 	pxTopOfStack--;
@@ -131,7 +131,7 @@ portSTACK_TYPE *pxPortInitialiseStack( portSTACK_TYPE *pxTopOfStack, pdTASK_CODE
 	pxTopOfStack -= 5;	/* R12, R3, R2 and R1. */
 	*pxTopOfStack = ( portSTACK_TYPE ) pvParameters;	/* R0 */
 
-	/* A save method is being used that requiers each task to maintain its
+	/* A save method is being used that requires each task to maintain its
 	own exec return value. */
 	pxTopOfStack--;
 	*pxTopOfStack = portINITIAL_EXEC_RETURN;

Source/portable/IAR/ARM_CM4F/portasm.s

@@ -56,11 +56,9 @@
 	RSEG    CODE:CODE(2)
 	thumb
 
-	EXTERN vPortYieldFromISR
 	EXTERN pxCurrentTCB
 	EXTERN vTaskSwitchContext
 
-	PUBLIC vSetMSP
 	PUBLIC xPortPendSVHandler
 	PUBLIC vPortSetInterruptMask
 	PUBLIC vPortClearInterruptMask
@@ -68,12 +66,7 @@
 	PUBLIC vPortStartFirstTask
 	PUBLIC vPortEnableVFP
 
-/*-----------------------------------------------------------*/
 
-vSetMSP
-	msr msp, r0
-	bx lr
-	
 /*-----------------------------------------------------------*/
 
 xPortPendSVHandler:
@@ -137,7 +130,7 @@ vPortClearInterruptMask:
 
 /*-----------------------------------------------------------*/
 
-vPortSVCHandler;
+vPortSVCHandler:
 	/* Get the location of the current TCB. */
 	ldr	r3, =pxCurrentTCB
 	ldr r1, [r3]
@@ -151,7 +144,7 @@ vPortSVCHandler;
 
 /*-----------------------------------------------------------*/
 
-vPortStartFirstTask
+vPortStartFirstTask:
 	/* Use the NVIC offset register to locate the stack. */
 	ldr r0, =0xE000ED08
 	ldr r0, [r0]
@@ -164,7 +157,7 @@ vPortStartFirstTask
 
 /*-----------------------------------------------------------*/
 
-vPortEnableVFP
+vPortEnableVFP:
 	/* The FPU enable bits are in the CPACR. */
 	ldr.w r0, =0xE000ED88
 	ldr	r1, [r0]

Source/portable/IAR/ARM_CM4F/portmacro.h

@@ -117,6 +117,10 @@ extern void vPortClearInterruptMask( void );
 #define portSET_INTERRUPT_MASK_FROM_ISR()		0;vPortSetInterruptMask()
 #define portCLEAR_INTERRUPT_MASK_FROM_ISR(x)	vPortClearInterruptMask();(void)x
 
+/* There are an uneven number of items on the initial stack, so 
+portALIGNMENT_ASSERT_pxCurrentTCB() will trigger false positive asserts. */
+#define portALIGNMENT_ASSERT_pxCurrentTCB ( void )
+
 /*-----------------------------------------------------------*/
 
 /* Task function macros as described on the FreeRTOS.org WEB site. */