1/*	$NetBSD: hardirq.h,v 1.3 2021/12/19 11:38:37 riastradh Exp $	*/
2
3/*-
4 * Copyright (c) 2018 The NetBSD Foundation, Inc.
5 * All rights reserved.
6 *
7 * This code is derived from software contributed to The NetBSD Foundation
8 * by Taylor R. Campbell.
9 *
10 * Redistribution and use in source and binary forms, with or without
11 * modification, are permitted provided that the following conditions
12 * are met:
13 * 1. Redistributions of source code must retain the above copyright
14 *    notice, this list of conditions and the following disclaimer.
15 * 2. Redistributions in binary form must reproduce the above copyright
16 *    notice, this list of conditions and the following disclaimer in the
17 *    documentation and/or other materials provided with the distribution.
18 *
19 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
20 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
21 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
22 * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
23 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
24 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
25 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
26 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
27 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
28 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
29 * POSSIBILITY OF SUCH DAMAGE.
30 */
31
32#ifndef	_LINUX_HARDIRQ_H_
33#define	_LINUX_HARDIRQ_H_
34
35#include <sys/types.h>
36#include <sys/kernel.h>
37#include <sys/xcall.h>
38
39/*
40 * synchronize_irq(irq)
41 *
42 *	Wait for all interrupt handlers servicing irq to complete on
43 *	all CPUs.  We just do a low-priority cross-call broadcast to
44 *	all CPUs, which can't run until interrupt handlers are done
45 *	running.
46 */
47static inline void
48synchronize_irq(int irq)
49{
50
51	if (!cold)
52		xc_barrier(0);
53}
54
55static inline void
56synchronize_hardirq(int irq)
57{
58
59	if (!cold)
60		xc_barrier(XC_HIGHPRI);
61}
62
63#endif	/* _LINUX_HARDIRQ_H_ */
64