159 lines
2.9 KiB
C
159 lines
2.9 KiB
C
/*-
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* Copyright (c) 1998 Doug Rabson
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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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* $FreeBSD$
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*/
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#ifndef _MACHINE_CPUFUNC_H_
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#define _MACHINE_CPUFUNC_H_
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#ifdef _KERNEL
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#include <sys/types.h>
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#include <machine/psl.h>
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#define CRITICAL_FORK (mfmsr() | PSL_EE)
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#ifdef __GNUC__
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static __inline void
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breakpoint(void)
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{
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return;
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}
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#endif
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/* CPU register mangling inlines */
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static __inline void
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mtmsr(unsigned int value)
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{
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__asm __volatile ("mtmsr %0" :: "r"(value));
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}
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static __inline unsigned int
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mfmsr(void)
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{
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unsigned int value;
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__asm __volatile ("mfmsr %0" : "=r"(value));
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return (value);
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}
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static __inline void
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mtdec(unsigned int value)
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{
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__asm __volatile ("mtdec %0" :: "r"(value));
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}
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static __inline unsigned int
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mfdec(void)
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{
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unsigned int value;
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__asm __volatile ("mfdec %0" : "=r"(value));
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return (value);
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}
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/*
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* Bogus interrupt manipulation
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*/
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static __inline void
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disable_intr(void)
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{
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unsigned int msr;
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msr = mfmsr();
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mtmsr(msr & ~PSL_EE);
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}
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static __inline void
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enable_intr(void)
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{
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unsigned int msr;
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msr = mfmsr();
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mtmsr(msr | PSL_EE);
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}
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static __inline unsigned int
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save_intr(void)
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{
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unsigned int msr;
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msr = mfmsr();
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return msr;
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}
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static __inline critical_t
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cpu_critical_enter(void)
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{
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return ((critical_t)save_intr());
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}
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static __inline void
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restore_intr(unsigned int msr)
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{
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mtmsr(msr);
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}
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static __inline void
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cpu_critical_exit(critical_t msr)
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{
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return (restore_intr((unsigned int)msr));
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}
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static __inline void
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powerpc_mb(void)
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{
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__asm __volatile("eieio; sync" : : : "memory");
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}
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static __inline struct pcpu *
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powerpc_get_pcpup(void)
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{
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struct pcpu *ret;
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__asm ("mfsprg %0, 0" : "=r"(ret));
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return(ret);
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}
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#endif /* _KERNEL */
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#endif /* !_MACHINE_CPUFUNC_H_ */
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