sparc: Added function that checks if IRQ is on or off

Signed-off-by: Daniel Hellstrom <daniel@gaisler.com>

arch/sparc/include/asm/irq.h

@@ -32,4 +32,7 @@ extern int intLock(void);
 /* Sets the PIL to oldLevel */
 extern void intUnlock(int oldLevel);
 
+/* Return non-zero if interrupts are currently enabled */
+extern int interrupt_is_enabled(void);
+
 #endif

arch/sparc/lib/interrupts.c

@@ -47,6 +47,13 @@ int disable_interrupts(void)
 	return intLock();
 }
 
+int interrupt_is_enabled(void)
+{
+	if (get_pil() == 15)
+		return 0;
+	return 1;
+}
+
 int interrupt_init(void)
 {
 	int ret;