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irq_lsapic.c

/*
 * LSAPIC Interrupt Controller
 *
 * This takes care of interrupts that are generated by the CPU's
 * internal Streamlined Advanced Programmable Interrupt Controller
 * (LSAPIC), such as the ITC and IPI interrupts.
    *
 * Copyright (C) 1999 VA Linux Systems
 * Copyright (C) 1999 Walt Drummond <drummond@valinux.com>
 * Copyright (C) 2000 Hewlett-Packard Co
 * Copyright (C) 2000 David Mosberger-Tang <davidm@hpl.hp.com>
 */

#include <linux/sched.h>
#include <linux/irq.h>

static unsigned int
lsapic_noop_startup (unsigned int irq)
{
      return 0;
}

static void
lsapic_noop (unsigned int irq)
{
      /* nothing to do... */
}

static int lsapic_retrigger(unsigned int irq)
{
      ia64_resend_irq(irq);

      return 1;
}

struct irq_chip irq_type_ia64_lsapic = {
      .name =           "LSAPIC",
      .startup =  lsapic_noop_startup,
      .shutdown = lsapic_noop,
      .enable =   lsapic_noop,
      .disable =  lsapic_noop,
      .ack =            lsapic_noop,
      .end =            lsapic_noop,
      .retrigger =      lsapic_retrigger,
};

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