1/*	$NetBSD: smp.h,v 1.5 2023/12/29 22:58:23 chs 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_SMP_H_
33#define	_LINUX_SMP_H_
34
35#include <sys/cpu.h>
36#include <sys/systm.h>
37#include <sys/xcall.h>
38
39#define	smp_processor_id()	cpu_number()
40
41static inline int
42get_cpu(void)
43{
44
45	kpreempt_disable();
46	return cpu_index(curcpu());
47}
48
49static inline void
50put_cpu(void)
51{
52
53	kpreempt_enable();
54}
55
56static inline void
57on_each_cpu_xc(void *a, void *b)
58{
59	void (**fp)(void *) = a;
60	void *cookie = b;
61
62	(**fp)(cookie);
63}
64
65static inline void
66on_each_cpu(void (*f)(void *), void *cookie, int wait)
67{
68	uint64_t ticket;
69
70	ticket = xc_broadcast(0, &on_each_cpu_xc, &f, cookie);
71	if (wait)
72		xc_wait(ticket);
73}
74
75#endif	/* _LINUX_SMP_H_ */
76