177 lines
4.0 KiB
C
177 lines
4.0 KiB
C
/* $NetBSD: cpufunc.h,v 1.16 1998/08/15 04:57:50 mycroft Exp $ */
|
|
|
|
/*-
|
|
* Copyright (c) 1998 The NetBSD Foundation, Inc.
|
|
* All rights reserved.
|
|
*
|
|
* 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:
|
|
* 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.
|
|
*
|
|
* 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.
|
|
*/
|
|
|
|
#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
|
|
|
|
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 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 */
|
|
|
|
#endif /* !_I386_CPUFUNC_H_ */
|