Add the rt linux 4.1.3-rt3 as base

[kvmfornfv.git] / kernel / arch / ia64 / hp / sim / hpsim_irq.c

diff --git a/kernel/arch/ia64/hp/sim/hpsim_irq.c b/kernel/arch/ia64/hp/sim/hpsim_irq.c
new file mode 100644 (file)
index 0000000..0aa70eb
--- /dev/null
+++ b/kernel/arch/ia64/hp/sim/hpsim_irq.c
@@ -0,0 +1,75 @@
+/*
+ * Platform dependent support for HP simulator.
+ *
+ * Copyright (C) 1998-2001 Hewlett-Packard Co
+ * Copyright (C) 1998-2001 David Mosberger-Tang <davidm@hpl.hp.com>
+ */
+
+#include <linux/init.h>
+#include <linux/kernel.h>
+#include <linux/sched.h>
+#include <linux/irq.h>
+
+#include "hpsim_ssc.h"
+
+static unsigned int
+hpsim_irq_startup(struct irq_data *data)
+{
+       return 0;
+}
+
+static void
+hpsim_irq_noop(struct irq_data *data)
+{
+}
+
+static int
+hpsim_set_affinity_noop(struct irq_data *d, const struct cpumask *b, bool f)
+{
+       return 0;
+}
+
+static struct irq_chip irq_type_hp_sim = {
+       .name =                 "hpsim",
+       .irq_startup =          hpsim_irq_startup,
+       .irq_shutdown =         hpsim_irq_noop,
+       .irq_enable =           hpsim_irq_noop,
+       .irq_disable =          hpsim_irq_noop,
+       .irq_ack =              hpsim_irq_noop,
+       .irq_set_affinity =     hpsim_set_affinity_noop,
+};
+
+static void hpsim_irq_set_chip(int irq)
+{
+       struct irq_chip *chip = irq_get_chip(irq);
+
+       if (chip == &no_irq_chip)
+               irq_set_chip(irq, &irq_type_hp_sim);
+}
+
+static void hpsim_connect_irq(int intr, int irq)
+{
+       ia64_ssc(intr, irq, 0, 0, SSC_CONNECT_INTERRUPT);
+}
+
+int hpsim_get_irq(int intr)
+{
+       int irq = assign_irq_vector(AUTO_ASSIGN);
+
+       if (irq >= 0) {
+               hpsim_irq_set_chip(irq);
+               irq_set_handler(irq, handle_simple_irq);
+               hpsim_connect_irq(intr, irq);
+       }
+
+       return irq;
+}
+
+void __init
+hpsim_irq_init (void)
+{
+       int i;
+
+       for_each_active_irq(i)
+               hpsim_irq_set_chip(i);
+}