Add configCLEAR_TICK_INTERRUPT() to the IAR and RVDS Cortex-A9 ports.

Replace LDMFD with POP instructions in IAR and RVDS Cortex-A9 ports.
Replace branch to address with indirect branch and exchange to address in register in the IAR and RVDS Cortex-A9 ports.

FreeRTOS/Source/portable/IAR/ARM_CA9/port.c

@@ -113,6 +113,10 @@
 	#error configMAX_API_CALL_INTERRUPT_PRIORITY must be greater than ( configUNIQUE_INTERRUPT_PRIORITIES / 2 )
 #endif
 
+#ifndef configCLEAR_TICK_INTERRUPT
+	#define configCLEAR_TICK_INTERRUPT()
+#endif
+
 /* A critical section is exited when the critical section nesting count reaches
 this value. */
 #define portNO_CRITICAL_NESTING			( ( uint32_t ) 0 )
@@ -131,7 +135,6 @@ context. */
 /* Constants required to setup the initial task context. */
 #define portINITIAL_SPSR				( ( StackType_t ) 0x1f ) /* System mode, ARM mode, interrupts enabled. */
 #define portTHUMB_MODE_BIT				( ( StackType_t ) 0x20 )
-#define portINTERRUPT_ENABLE_BIT		( 0x80UL )
 #define portTHUMB_MODE_ADDRESS			( 0x01UL )
 
 /* Used by portASSERT_IF_INTERRUPT_PRIORITY_INVALID() when ensuring the binary
@@ -354,6 +357,7 @@ void FreeRTOS_Tick_Handler( void )
 
 	/* Ensure all interrupt priorities are active again. */
 	portCLEAR_INTERRUPT_MASK();
+	configCLEAR_TICK_INTERRUPT();
 }
 /*-----------------------------------------------------------*/
 

FreeRTOS/Source/portable/IAR/ARM_CA9/portASM.h

@@ -113,7 +113,7 @@ portRESTORE_CONTEXT macro
 	CMP		R1, #0
 
 	; Restore the floating point context, if any
-	LDMFDNE SP!, {R0}
+	POPNE 	{R0}
 	VPOPNE	{D16-D31}
 	VPOPNE	{D0-D15}
 	VMSRNE  FPSCR, R0

FreeRTOS/Source/portable/IAR/ARM_CA9/portASM.s

@@ -130,7 +130,8 @@ FreeRTOS_IRQ_Handler
 
 	; Call the interrupt handler
 	PUSH	{r0-r3, lr}
-	BL		vApplicationIRQHandler
+	LDR		r1, =vApplicationIRQHandler
+	BLX		r1
 	POP		{r0-r3, lr}
 	ADD		sp, sp, r2
 
@@ -184,7 +185,8 @@ switch_before_exit
 	; vTaskSwitchContext() if vTaskSwitchContext() uses LDRD or STRD
 	; instructions, or 8 byte aligned stack allocated data.  LR does not need
 	; saving as a new LR will be loaded by portRESTORE_CONTEXT anyway.
-	BL		vTaskSwitchContext
+	LDR		r0, =vTaskSwitchContext
+	BLX		r0
 
 	; Restore the context of, and branch to, the task selected to execute next.
 	portRESTORE_CONTEXT