166 lines
3.0 KiB
C
166 lines
3.0 KiB
C
/*-
|
|
* 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 | PSL_RI)
|
|
|
|
#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|PSL_RI));
|
|
}
|
|
|
|
static __inline void
|
|
enable_intr(void)
|
|
{
|
|
unsigned int msr;
|
|
|
|
msr = mfmsr();
|
|
mtmsr(msr | PSL_EE | PSL_RI);
|
|
}
|
|
|
|
static __inline unsigned int
|
|
save_intr(void)
|
|
{
|
|
unsigned int msr;
|
|
|
|
msr = mfmsr();
|
|
|
|
return msr;
|
|
}
|
|
|
|
static __inline critical_t
|
|
cpu_critical_enter(void)
|
|
{
|
|
u_int msr;
|
|
critical_t crit;
|
|
|
|
msr = mfmsr();
|
|
crit = (critical_t)msr;
|
|
msr &= ~(PSL_EE | PSL_RI);
|
|
mtmsr(msr);
|
|
|
|
return (crit);
|
|
}
|
|
|
|
static __inline void
|
|
restore_intr(unsigned int msr)
|
|
{
|
|
|
|
mtmsr(msr);
|
|
}
|
|
|
|
static __inline void
|
|
cpu_critical_exit(critical_t msr)
|
|
{
|
|
|
|
mtmsr(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_ */
|