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 void
  25 hpsim_set_affinity_noop (unsigned int a, cpumask_t b)
  26 {
  27 }
  28
  29 static struct hw_interrupt_type irq_type_hp_sim = {
  30         .name =         "hpsim",
  31         .startup =      hpsim_irq_startup,
  32         .shutdown =     hpsim_irq_noop,
  33         .enable =       hpsim_irq_noop,
  34         .disable =      hpsim_irq_noop,
  35         .ack =          hpsim_irq_noop,
  36         .end =          hpsim_irq_noop,
  37         .set_affinity = hpsim_set_affinity_noop,
  38 };
  39
  40 void __init
  41 hpsim_irq_init (void)
  42 {
  43         irq_desc_t *idesc;
  44         int i;
  45
  46         for (i = 0; i < NR_IRQS; ++i) {
  47                 idesc = irq_desc + i;
  48                 if (idesc->chip == &no_irq_type)
  49                         idesc->chip = &irq_type_hp_sim;
  50         }
  51 }