1 files changed, 66 insertions, 0 deletions
diff --git a/i386/i386/irq.c b/i386/i386/irq.c
new file mode 100644
index 00000000..c65d2ea2
--- /dev/null
+++ b/i386/i386/irq.c
@@ -0,0 +1,66 @@
+/*
+ * Copyright (C) 1995 Shantanu Goel
+ * Copyright (C) 2020 Free Software Foundation, Inc
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2, or (at your option)
+ * any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
+ */
+
+#include <i386/irq.h>
+#include <device/intr.h>
+#include <mach/kern_return.h>
+#include <kern/queue.h>
+#include <machine/machspl.h>
+
+extern queue_head_t main_intr_queue;
+
+static void
+irq_eoi (struct irqdev *dev, int id)
+{
+  /* TODO EOI(dev->irq[id]) */
+}
+
+static unsigned int ndisabled_irq[NINTR];
+
+void
+__disable_irq (irq_t irq_nr)
+{
+  assert (irq_nr < NINTR);
+
+  spl_t s = splhigh();
+  ndisabled_irq[irq_nr]++;
+  assert (ndisabled_irq[irq_nr] > 0);
+  if (ndisabled_irq[irq_nr] == 1)
+    mask_irq (irq_nr);
+  splx(s);
+}
+
+void
+__enable_irq (irq_t irq_nr)
+{
+  assert (irq_nr < NINTR);
+
+  spl_t s = splhigh();
+  assert (ndisabled_irq[irq_nr] > 0);
+  ndisabled_irq[irq_nr]--;
+  if (ndisabled_irq[irq_nr] == 0)
+    unmask_irq (irq_nr);
+  splx(s);
+}
+
+struct irqdev irqtab = {
+  "irq", irq_eoi, &main_intr_queue, 0,
+  {0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15},
+};
+