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(struct irq_data *data)
  15 {
  16         return 0;
  17 }
  18
  19 static void
  20 hpsim_irq_noop(struct irq_data *data)
  21 {
  22 }
  23
  24 static int
  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
  41 hpsim_irq_init (void)
  42 {
  43         struct irq_desc *idesc;
  44         int i;
  45
  46         for (i = 0; i < NR_IRQS; ++i) {
  47                 idesc = irq_desc + i;
  48                 if (idesc->chip == &no_irq_chip)
  49                         idesc->chip = &irq_type_hp_sim;
  50         }
  51 }