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
  13#include "hpsim_ssc.h"
  14
  15static unsigned int
  16hpsim_irq_startup(struct irq_data *data)
  17{
  18        return 0;
  19}
  20
  21static void
  22hpsim_irq_noop(struct irq_data *data)
  23{
  24}
  25
  26static int
  27hpsim_set_affinity_noop(struct irq_data *d, const struct cpumask *b, bool f)
  28{
  29        return 0;
  30}
  31
  32static struct irq_chip irq_type_hp_sim = {
  33        .name =                 "hpsim",
  34        .irq_startup =          hpsim_irq_startup,
  35        .irq_shutdown =         hpsim_irq_noop,
  36        .irq_enable =           hpsim_irq_noop,
  37        .irq_disable =          hpsim_irq_noop,
  38        .irq_ack =              hpsim_irq_noop,
  39        .irq_set_affinity =     hpsim_set_affinity_noop,
  40};
  41
  42static void hpsim_irq_set_chip(int irq)
  43{
  44        struct irq_chip *chip = irq_get_chip(irq);
  45
  46        if (chip == &no_irq_chip)
  47                irq_set_chip(irq, &irq_type_hp_sim);
  48}
  49
  50static void hpsim_connect_irq(int intr, int irq)
  51{
  52        ia64_ssc(intr, irq, 0, 0, SSC_CONNECT_INTERRUPT);
  53}
  54
  55int hpsim_get_irq(int intr)
  56{
  57        int irq = assign_irq_vector(AUTO_ASSIGN);
  58
  59        if (irq >= 0) {
  60                hpsim_irq_set_chip(irq);
  61                irq_set_handler(irq, handle_simple_irq);
  62                hpsim_connect_irq(intr, irq);
  63        }
  64
  65        return irq;
  66}
  67
  68void __init
  69hpsim_irq_init (void)
  70{
  71        int i;
  72
  73        for_each_active_irq(i)
  74                hpsim_irq_set_chip(i);
  75}
  76