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 */
47 static inline void
synchronize_irq(int irq)48 synchronize_irq(int irq)
49 {
50
51 if (!cold)
52 xc_barrier(0);
53 }
54
55 static inline void
synchronize_hardirq(int irq)56 synchronize_hardirq(int irq)
57 {
58
59 if (!cold)
60 xc_barrier(XC_HIGHPRI);
61 }
62
63 #endif /* _LINUX_HARDIRQ_H_ */
64