diff --git a/arch/arm/include/armv7-r/irq.h b/arch/arm/include/armv7-r/irq.h
index a31c90ebbb..cbfaab7315 100644
--- a/arch/arm/include/armv7-r/irq.h
+++ b/arch/arm/include/armv7-r/irq.h
@@ -389,6 +389,24 @@ static inline irqstate_t up_irq_enable(void)
   return cpsr;
 }
 
+/* Disable IRQs and return the previous IRQ state */
+
+static inline irqstate_t up_irq_disable(void)
+{
+  unsigned int cpsr;
+
+  __asm__ __volatile__
+    (
+      "\tmrs    %0, cpsr\n"
+      "\tcpsid  i\n"
+      : "=r" (cpsr)
+      :
+      : "memory"
+    );
+
+  return cpsr;
+}
+
 /* Restore saved IRQ & FIQ state */
 
 static inline void up_irq_restore(irqstate_t flags)
diff --git a/arch/arm/include/armv8-r/irq.h b/arch/arm/include/armv8-r/irq.h
index b0e1a9ff8d..2f4216fb04 100644
--- a/arch/arm/include/armv8-r/irq.h
+++ b/arch/arm/include/armv8-r/irq.h
@@ -389,6 +389,24 @@ static inline irqstate_t up_irq_enable(void)
   return cpsr;
 }
 
+/* Disable IRQs and return the previous IRQ state */
+
+static inline irqstate_t up_irq_disable(void)
+{
+  unsigned int cpsr;
+
+  __asm__ __volatile__
+    (
+      "\tmrs    %0, cpsr\n"
+      "\tcpsid  i\n"
+      : "=r" (cpsr)
+      :
+      : "memory"
+    );
+
+  return cpsr;
+}
+
 /* Restore saved IRQ & FIQ state */
 
 static inline void up_irq_restore(irqstate_t flags)