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/*-
 * Copyright (c) 1999 Luoqi Chen <luoqi@freebsd.org>
 * All rights reserved.
 *
 * 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 AUTHOR 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 AUTHOR 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.
 *
 *	from: FreeBSD: src/sys/i386/include/globaldata.h,v 1.27 2001/04/27
 * $FreeBSD: release/9.1.0/sys/arm/include/pcpu.h 182945 2008-09-11 20:39:46Z cognet $
 */

#ifndef	_MACHINE_PCPU_H_
#define	_MACHINE_PCPU_H_

#ifdef _KERNEL

#include <machine/frame.h>

#define	ALT_STACK_SIZE	128

struct vmspace;

#endif	/* _KERNEL */

#define	PCPU_MD_FIELDS

#ifdef _KERNEL

struct pcb;
struct pcpu;

extern struct pcpu *pcpup;
extern struct pcpu __pcpu;

#define	PCPU_GET(member)	(__pcpu.pc_ ## member)

/*
 * XXX The implementation of this operation should be made atomic
 * with respect to preemption.
 */
#define	PCPU_ADD(member, value)	(__pcpu.pc_ ## member += (value))
#define	PCPU_INC(member)	PCPU_ADD(member, 1)
#define	PCPU_PTR(member)	(&__pcpu.pc_ ## member)
#define	PCPU_SET(member,value)	(__pcpu.pc_ ## member = (value))

#endif	/* _KERNEL */

#endif	/* !_MACHINE_PCPU_H_ */

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