1 /*
2 * Platform dependent support for HP simulator.
3 *
4 * Copyright (C) 1998-2001 Hewlett-Packard Co
5 * Copyright (C) 1998-2001 David Mosberger-Tang <davidm@hpl.hp.com>
6 */
7
8 #include <linux/init.h>
9 #include <linux/kernel.h>
10 #include <linux/sched.h>
11 #include <linux/irq.h>
12
13 static unsigned int
hpsim_irq_startup(struct irq_data * data)14 hpsim_irq_startup(struct irq_data *data)
15 {
16 return 0;
17 }
18
19 static void
hpsim_irq_noop(struct irq_data * data)20 hpsim_irq_noop(struct irq_data *data)
21 {
22 }
23
24 static int
hpsim_set_affinity_noop(struct irq_data * d,const struct cpumask * b,bool f)25 hpsim_set_affinity_noop(struct irq_data *d, const struct cpumask *b, bool f)
26 {
27 return 0;
28 }
29
30 static struct irq_chip irq_type_hp_sim = {
31 .name = "hpsim",
32 .irq_startup = hpsim_irq_startup,
33 .irq_shutdown = hpsim_irq_noop,
34 .irq_enable = hpsim_irq_noop,
35 .irq_disable = hpsim_irq_noop,
36 .irq_ack = hpsim_irq_noop,
37 .irq_set_affinity = hpsim_set_affinity_noop,
38 };
39
40 void __init
hpsim_irq_init(void)41 hpsim_irq_init (void)
42 {
43 int i;
44
45 for_each_active_irq(i) {
46 struct irq_chip *chip = irq_get_chip(i);
47
48 if (chip == &no_irq_chip)
49 irq_set_chip(i, &irq_type_hp_sim);
50 }
51 }
52