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/* $OpenBSD: cpufunc.h,v 1.7 2001/08/18 20:37:42 espie Exp $ */
/* $NetBSD: cpufunc.h,v 1.8 1994/10/27 04:15:59 cgd Exp $ */
/*
* Copyright (c) 1993 Charles Hannum.
* 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.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by Charles Hannum.
* 4. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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 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.
*/
#ifndef _I386_CPUFUNC_H_
#define _I386_CPUFUNC_H_
/*
* Functions to provide access to i386-specific instructions.
*/
#include <sys/cdefs.h>
#include <sys/types.h>
static __inline void invlpg __P((u_int));
static __inline void lidt __P((void *));
static __inline void lldt __P((u_short));
static __inline void ltr __P((u_short));
static __inline void lcr0 __P((u_int));
static __inline u_int rcr0 __P((void));
static __inline u_int rcr2 __P((void));
static __inline void lcr3 __P((u_int));
static __inline u_int rcr3 __P((void));
static __inline void lcr4 __P((u_int));
static __inline u_int rcr4 __P((void));
static __inline void tlbflush __P((void));
static __inline void disable_intr __P((void));
static __inline void enable_intr __P((void));
static __inline void wbinvd __P((void));
static __inline void wrmsr __P((u_int, u_int64_t));
static __inline u_int64_t rdmsr __P((u_int));
static __inline void breakpoint __P((void));
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;
}
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");
}
static __inline void
wbinvd(void)
{
__asm __volatile("wbinvd");
}
static __inline void
wrmsr(u_int msr, u_int64_t newval)
{
__asm __volatile(".byte 0x0f, 0x30" : : "A" (newval), "c" (msr));
}
static __inline u_int64_t
rdmsr(u_int msr)
{
u_int64_t rv;
__asm __volatile(".byte 0x0f, 0x32" : "=A" (rv) : "c" (msr));
return (rv);
}
/* Break into DDB/KGDB. */
static __inline void
breakpoint(void)
{
__asm __volatile("int $3");
}
#endif /* !_I386_CPUFUNC_H_ */
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