1 files changed, 8 insertions, 2 deletions
diff --git a/picirq.c b/picirq.c
index eaac053..b7d0116 100644
--- a/picirq.c
+++ b/picirq.c
@@ -11,9 +11,9 @@
 
 // Current IRQ mask.
 // Initial IRQ mask has interrupt 2 enabled (for slave 8259A).
-ushort irq_mask_8259A = 0xFFFF & ~(1<<IRQ_SLAVE);
+static ushort irq_mask_8259A = 0xFFFF & ~(1<<IRQ_SLAVE);
 
-void
+static void
 irq_setmask_8259A(ushort mask)
 {
   irq_mask_8259A = mask;
@@ -22,6 +22,12 @@ irq_setmask_8259A(ushort mask)
   outb(IO_PIC2+1, (char)(mask >> 8));
 }
 
+void
+irq_enable(int irq)
+{
+  irq_setmask_8259A(irq_mask_8259A & ~(1<<irq));
+}
+
 // Initialize the 8259A interrupt controllers.
 void
 pic_init(void)