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/* $NetBSD: smp.h,v 1.4 2021/12/19 11:49:12 riastradh Exp $ */
/*-
* Copyright (c) 2018 The NetBSD Foundation, Inc.
* All rights reserved.
*
* This code is derived from software contributed to The NetBSD Foundation
* by Taylor R. Campbell.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*/
#ifndef _LINUX_SMP_H_
#define _LINUX_SMP_H_
#include <sys/cpu.h>
#include <sys/systm.h>
#include <sys/xcall.h>
#define smp_processor_id() cpu_number()
static inline int
get_cpu(void)
{
kpreempt_disable();
return cpu_index(curcpu());
}
static inline void
put_cpu(void)
{
kpreempt_disable();
}
static inline void
on_each_cpu_xc(void *a, void *b)
{
void (**fp)(void *) = a;
void *cookie = b;
(**fp)(cookie);
}
static inline void
on_each_cpu(void (*f)(void *), void *cookie, int wait)
{
uint64_t ticket;
ticket = xc_broadcast(0, &on_each_cpu_xc, &f, cookie);
if (wait)
xc_wait(ticket);
}
#endif /* _LINUX_SMP_H_ */
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