NetBSD/sys/arch/i386/include/cpufunc.h

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/* $NetBSD: cpufunc.h,v 1.16 1998/08/15 04:57:50 mycroft Exp $ */
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/*-
* Copyright (c) 1998 The NetBSD Foundation, Inc.
* All rights reserved.
*
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* This code is derived from software contributed to The NetBSD Foundation
* by Charles M. Hannum.
*
* 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.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
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* This product includes software developed by the NetBSD
* Foundation, Inc. and its contributors.
* 4. Neither the name of The NetBSD Foundation nor the names of its
* contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
*
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* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. 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 FOUNDATION 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.
*/
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#ifndef _I386_CPUFUNC_H_
#define _I386_CPUFUNC_H_
/*
* Functions to provide access to i386-specific instructions.
*/
#include <sys/cdefs.h>
#include <sys/types.h>
#ifdef _KERNEL
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static __inline void
invlpg(u_int addr)
{
__asm __volatile("invlpg (%0)" : : "r" (addr) : "memory");
}
static __inline void
lidt(void *p)
{
__asm __volatile("lidt (%0)" : : "r" (p));
}
static __inline void
lldt(u_short sel)
{
__asm __volatile("lldt %0" : : "r" (sel));
}
static __inline void
ltr(u_short sel)
{
__asm __volatile("ltr %0" : : "r" (sel));
}
static __inline void
lcr0(u_int val)
{
__asm __volatile("movl %0,%%cr0" : : "r" (val));
}
static __inline u_int
rcr0(void)
{
u_int val;
__asm __volatile("movl %%cr0,%0" : "=r" (val));
return val;
}
static __inline u_int
rcr2(void)
{
u_int val;
__asm __volatile("movl %%cr2,%0" : "=r" (val));
return val;
}
static __inline void
lcr3(u_int val)
{
__asm __volatile("movl %0,%%cr3" : : "r" (val));
}
static __inline u_int
rcr3(void)
{
u_int val;
__asm __volatile("movl %%cr3,%0" : "=r" (val));
return val;
}
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static __inline void
lcr4(u_int val)
{
__asm __volatile("movl %0,%%cr4" : : "r" (val));
}
static __inline u_int
rcr4(void)
{
u_int val;
__asm __volatile("movl %%cr4,%0" : "=r" (val));
return val;
}
static __inline void
tlbflush(void)
{
u_int val;
__asm __volatile("movl %%cr3,%0" : "=r" (val));
__asm __volatile("movl %0,%%cr3" : : "r" (val));
}
#ifdef notyet
void setidt __P((int idx, /*XXX*/caddr_t func, int typ, int dpl));
#endif
/* XXXX ought to be in psl.h with spl() functions */
static __inline void
disable_intr(void)
{
__asm __volatile("cli");
}
static __inline void
enable_intr(void)
{
__asm __volatile("sti");
}
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static __inline u_long
read_eflags(void)
{
u_long ef;
__asm __volatile("pushfl; popl %0" : "=r" (ef));
return (ef);
}
static __inline void
write_eflags(u_long ef)
{
__asm __volatile("pushl %0; popfl" : : "r" (ef));
}
/* Break into DDB/KGDB. */
static __inline void
breakpoint(void)
{
__asm __volatile("int $3");
}
#endif /* _KERNEL */
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#endif /* !_I386_CPUFUNC_H_ */