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