[Work In Progress] Adding the xPortIsInsideInterrupt to the PIC32MZ port

Author: kstribrnAmzn

portable/MPLAB/PIC32MZ/port.c

@@ -372,3 +372,25 @@ void vPortClearInterruptMaskFromISR( UBaseType_t uxSavedStatusRegister )
 #endif /* __mips_hard_float == 1 */
 
 /*-----------------------------------------------------------*/
+
+__attribute__((always_inline)) static BaseType_t xPortIsInsideInterrupt( void )
+{
+    uint32_t ulCurrentInterrupt;
+    BaseType_t xReturn;
+
+    /* Obtain the number of the currently executing interrupt. */
+    __asm volatile("mfc0 %0, $12" : "=r" (ulCurrentInterrupt));
+
+    if( ulCurrentInterrupt == 0 )
+    {
+        xReturn = pdFALSE;
+    }
+    else
+    {
+        xReturn = pdTRUE;
+    }
+
+    return xReturn;
+}
+
+/*-----------------------------------------------------------*/

portable/MPLAB/PIC32MZ/portmacro.h

@@ -146,6 +146,8 @@ extern void vPortClearInterruptMaskFromISR( UBaseType_t );
 #define portSET_INTERRUPT_MASK_FROM_ISR() uxPortSetInterruptMaskFromISR()
 #define portCLEAR_INTERRUPT_MASK_FROM_ISR( uxSavedStatusRegister ) vPortClearInterruptMaskFromISR( uxSavedStatusRegister )
 
+extern BaseType_t xPortIsInsideInterrupt( void );
+
 #if ( __mips_hard_float == 0 ) && ( configUSE_TASK_FPU_SUPPORT == 1 )
     #error configUSE_TASK_FPU_SUPPORT can only be set to 1 when the part supports a hardware FPU module.
 #endif