ia64: allocate percpu area for cpu0 like percpu areas for other cpus
[linux-2.6.git] / arch / ia64 / hp / sim / hpsim_irq.c
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
14 hpsim_irq_startup (unsigned int irq)
15 {
16         return 0;
17 }
18
19 static void
20 hpsim_irq_noop (unsigned int irq)
21 {
22 }
23
24 static int
25 hpsim_set_affinity_noop(unsigned int a, const struct cpumask *b)
26 {
27         return 0;
28 }
29
30 static struct irq_chip irq_type_hp_sim = {
31         .name =         "hpsim",
32         .startup =      hpsim_irq_startup,
33         .shutdown =     hpsim_irq_noop,
34         .enable =       hpsim_irq_noop,
35         .disable =      hpsim_irq_noop,
36         .ack =          hpsim_irq_noop,
37         .end =          hpsim_irq_noop,
38         .set_affinity = hpsim_set_affinity_noop,
39 };
40
41 void __init
42 hpsim_irq_init (void)
43 {
44         struct irq_desc *idesc;
45         int i;
46
47         for (i = 0; i < NR_IRQS; ++i) {
48                 idesc = irq_desc + i;
49                 if (idesc->chip == &no_irq_chip)
50                         idesc->chip = &irq_type_hp_sim;
51         }
52 }