// SPDX-License-Identifier: GPL-2.0
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/*
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* Platform dependent support for HP simulator.
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*
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* Copyright (C) 1998-2001 Hewlett-Packard Co
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* Copyright (C) 1998-2001 David Mosberger-Tang <davidm@hpl.hp.com>
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*/
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#include <linux/init.h>
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#include <linux/kernel.h>
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#include <linux/sched.h>
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#include <linux/irq.h>
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#include "hpsim_ssc.h"
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static unsigned int
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hpsim_irq_startup(struct irq_data *data)
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{
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return 0;
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}
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static void
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hpsim_irq_noop(struct irq_data *data)
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{
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}
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static int
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hpsim_set_affinity_noop(struct irq_data *d, const struct cpumask *b, bool f)
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{
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return 0;
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}
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static struct irq_chip irq_type_hp_sim = {
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.name = "hpsim",
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.irq_startup = hpsim_irq_startup,
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.irq_shutdown = hpsim_irq_noop,
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.irq_enable = hpsim_irq_noop,
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.irq_disable = hpsim_irq_noop,
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.irq_ack = hpsim_irq_noop,
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.irq_set_affinity = hpsim_set_affinity_noop,
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};
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static void hpsim_irq_set_chip(int irq)
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{
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struct irq_chip *chip = irq_get_chip(irq);
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if (chip == &no_irq_chip)
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irq_set_chip(irq, &irq_type_hp_sim);
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}
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static void hpsim_connect_irq(int intr, int irq)
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{
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ia64_ssc(intr, irq, 0, 0, SSC_CONNECT_INTERRUPT);
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}
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int hpsim_get_irq(int intr)
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{
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int irq = assign_irq_vector(AUTO_ASSIGN);
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if (irq >= 0) {
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hpsim_irq_set_chip(irq);
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irq_set_handler(irq, handle_simple_irq);
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hpsim_connect_irq(intr, irq);
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}
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return irq;
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}
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void __init
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hpsim_irq_init (void)
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{
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int i;
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for_each_active_irq(i)
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hpsim_irq_set_chip(i);
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}
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