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