c640357f04
header file. Reimplement PCPU_LAZY_INC() on amd64 and i386 making it atomic with respect to interrupts. Reviewed by: bde, jhb
67 lines
2.2 KiB
C
67 lines
2.2 KiB
C
/*-
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* Copyright (c) 1999 Luoqi Chen <luoqi@freebsd.org>
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* from: FreeBSD: src/sys/i386/include/globaldata.h,v 1.27 2001/04/27
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* $FreeBSD$
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*/
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#ifndef _MACHINE_PCPU_H_
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#define _MACHINE_PCPU_H_
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#ifdef _KERNEL
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#include <machine/frame.h>
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#define ALT_STACK_SIZE 128
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struct vmspace;
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/*
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* Inside the kernel, the globally reserved register g7 is used to
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* point at the globaldata structure.
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*/
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#define PCPU_MD_FIELDS \
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struct pcup *pc_prvspace;
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struct pcb;
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struct pcpu;
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extern struct pcpu *pcpup;
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extern struct pcpu __pcpu;
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#define PCPU_GET(member) (__pcpu.pc_ ## member)
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/*
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* XXX The implementation of this operation should be made atomic
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* with respect to preemption.
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*/
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#define PCPU_LAZY_INC(member) (++__pcpu.pc_ ## member)
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#define PCPU_PTR(member) (&__pcpu.pc_ ## member)
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#define PCPU_SET(member,value) (__pcpu.pc_ ## member = (value))
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#endif /* _KERNEL */
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#endif /* !_MACHINE_PCPU_H_ */
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