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Diffstat (limited to 'kernel/arch/ia64/hp/sim/hpsim_irq.c')
-rw-r--r--kernel/arch/ia64/hp/sim/hpsim_irq.c75
1 files changed, 75 insertions, 0 deletions
diff --git a/kernel/arch/ia64/hp/sim/hpsim_irq.c b/kernel/arch/ia64/hp/sim/hpsim_irq.c
new file mode 100644
index 000000000..0aa70ebda
--- /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);
+}