LXR linux/arch/ia64/kernel/irq

   1/*
   2 * LSAPIC Interrupt Controller
   3 *
   4 * This takes care of interrupts that are generated by the CPU's
   5 * internal Streamlined Advanced Programmable Interrupt Controller
   6 * (LSAPIC), such as the ITC and IPI interrupts.
   7    *
   8 * Copyright (C) 1999 VA Linux Systems
   9 * Copyright (C) 1999 Walt Drummond <drummond@valinux.com>
  10 * Copyright (C) 2000 Hewlett-Packard Co
  11 * Copyright (C) 2000 David Mosberger-Tang <davidm@hpl.hp.com>
  12 */
  13
  14#include <linux/sched.h>
  15#include <linux/irq.h>
  16
  17static unsigned int
  18lsapic_noop_startup (struct irq_data *data)
  19{
  20        return 0;
  21}
  22
  23static void
  24lsapic_noop (struct irq_data *data)
  25{
  26        /* nothing to do... */
  27}
  28
  29static int lsapic_retrigger(struct irq_data *data)
  30{
  31        ia64_resend_irq(data->irq);
  32
  33        return 1;
  34}
  35
  36struct irq_chip irq_type_ia64_lsapic = {
  37        .name =                 "LSAPIC",
  38        .irq_startup =          lsapic_noop_startup,
  39        .irq_shutdown =         lsapic_noop,
  40        .irq_enable =           lsapic_noop,
  41        .irq_disable =          lsapic_noop,
  42        .irq_ack =              lsapic_noop,
  43        .irq_retrigger =        lsapic_retrigger,
  44};
  45