Add the rt linux 4.1.3-rt3 as base

[kvmfornfv.git] / kernel / arch / ia64 / kernel / irq_lsapic.c

diff --git a/kernel/arch/ia64/kernel/irq_lsapic.c b/kernel/arch/ia64/kernel/irq_lsapic.c
new file mode 100644 (file)
index 0000000..1b3a776
--- /dev/null
+++ b/kernel/arch/ia64/kernel/irq_lsapic.c
@@ -0,0 +1,44 @@
+/*
+ * LSAPIC Interrupt Controller
+ *
+ * This takes care of interrupts that are generated by the CPU's
+ * internal Streamlined Advanced Programmable Interrupt Controller
+ * (LSAPIC), such as the ITC and IPI interrupts.
+    *
+ * Copyright (C) 1999 VA Linux Systems
+ * Copyright (C) 1999 Walt Drummond <drummond@valinux.com>
+ * Copyright (C) 2000 Hewlett-Packard Co
+ * Copyright (C) 2000 David Mosberger-Tang <davidm@hpl.hp.com>
+ */
+
+#include <linux/sched.h>
+#include <linux/irq.h>
+
+static unsigned int
+lsapic_noop_startup (struct irq_data *data)
+{
+       return 0;
+}
+
+static void
+lsapic_noop (struct irq_data *data)
+{
+       /* nothing to do... */
+}
+
+static int lsapic_retrigger(struct irq_data *data)
+{
+       ia64_resend_irq(data->irq);
+
+       return 1;
+}
+
+struct irq_chip irq_type_ia64_lsapic = {
+       .name =                 "LSAPIC",
+       .irq_startup =          lsapic_noop_startup,
+       .irq_shutdown =         lsapic_noop,
+       .irq_enable =           lsapic_noop,
+       .irq_disable =          lsapic_noop,
+       .irq_ack =              lsapic_noop,
+       .irq_retrigger =        lsapic_retrigger,
+};