First update of vPortTaskUsesFPU API

Author: kar-rahul-aws

portable/GCC/ARM_CRx_No_GIC/port.c

@@ -312,13 +312,14 @@ void FreeRTOS_Tick_Handler( void )
 
 void vPortTaskUsesFPU( void )
 {
-    uint32_t ulInitialFPSCR = 0;
+    //uint32_t ulInitialFPSCR = 0;
 
     /* A task is registering the fact that it needs an FPU context.  Set the
      * FPU flag (which is saved as part of the task context). */
     ulPortTaskHasFPUContext = pdTRUE;
 
     /* Initialise the floating point status register. */
-    __asm volatile ( "FMXR  FPSCR, %0" ::"r" ( ulInitialFPSCR ) : "memory" );
+    vSetupFPU();
+    /*__asm volatile ( "FMXR  FPSCR, %0" ::"r" ( ulInitialFPSCR ) : "memory" );*/
 }
-/*-----------------------------------------------------------*/
+/*-----------------------------------------------------------*/

portable/GCC/ARM_CRx_No_GIC/portASM.S

@@ -149,6 +149,15 @@ vPortRestoreTaskContext:
     /* Switch to system mode. */
     CPS     #SYS_MODE
     portRESTORE_CONTEXT
+    
+.align 4
+.type vSetupFPU, %function
+vSetupFPU:
+    PUSH  { R0 }
+    MOV   R0, #0x0
+    FMXR  FPSCR, R0
+    POP   { R0 }
+    BX 	  LR
 
 .align 4
 .type FreeRTOS_IRQ_Handler, %function