LXR linux/arch/ia64/hp/sim/hpsim

   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
  13static unsigned int
  14hpsim_irq_startup (unsigned int irq)
  15{
  16        return 0;
  17}
  18
  19static void
  20hpsim_irq_noop (unsigned int irq)
  21{
  22}
  23
  24static int
  25hpsim_set_affinity_noop(unsigned int a, const struct cpumask *b)
  26{
  27        return 0;
  28}
  29
  30static 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
  41void __init
  42hpsim_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}
  53