From 9863019a0baf040f3e5abf11023d4cc4711ec202 Mon Sep 17 00:00:00 2001
From: Kody Stribrny <kstribrn@amazon.com>
Date: Fri, 25 Jul 2025 16:55:00 -0700
Subject: [PATCH] [Work In Progress] Adding the xPortIsInsideInterrupt to the
 PIC32MZ port

---
 portable/MPLAB/PIC32MZ/port.c      | 22 ++++++++++++++++++++++
 portable/MPLAB/PIC32MZ/portmacro.h |  2 ++
 2 files changed, 24 insertions(+)

diff --git a/portable/MPLAB/PIC32MZ/port.c b/portable/MPLAB/PIC32MZ/port.c
index 4af1fb832..4a51f6c7f 100644
--- a/portable/MPLAB/PIC32MZ/port.c
+++ b/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;
+}
+
+/*-----------------------------------------------------------*/
diff --git a/portable/MPLAB/PIC32MZ/portmacro.h b/portable/MPLAB/PIC32MZ/portmacro.h
index 8b0497086..a76099e18 100644
--- a/portable/MPLAB/PIC32MZ/portmacro.h
+++ b/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