171 lines
3.7 KiB
C
171 lines
3.7 KiB
C
/* $NetBSD: cpufunc.h,v 1.14 1998/02/26 01:57:30 perry Exp $ */
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/*
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* Copyright (c) 1993 Charles Hannum.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by Charles Hannum.
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* 4. The name of the author may not be used to endorse or promote products
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* derived from this software without specific prior written permission
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#ifndef _I386_CPUFUNC_H_
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#define _I386_CPUFUNC_H_
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/*
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* Functions to provide access to i386-specific instructions.
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*/
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#include <sys/cdefs.h>
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#include <sys/types.h>
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#ifdef _KERNEL
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static __inline void
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invlpg(u_int addr)
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{
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__asm __volatile("invlpg (%0)" : : "r" (addr) : "memory");
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}
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static __inline void
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lidt(void *p)
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{
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__asm __volatile("lidt (%0)" : : "r" (p));
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}
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static __inline void
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lldt(u_short sel)
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{
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__asm __volatile("lldt %0" : : "r" (sel));
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}
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static __inline void
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ltr(u_short sel)
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{
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__asm __volatile("ltr %0" : : "r" (sel));
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}
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static __inline void
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lcr0(u_int val)
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{
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__asm __volatile("movl %0,%%cr0" : : "r" (val));
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}
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static __inline u_int
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rcr0(void)
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{
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u_int val;
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__asm __volatile("movl %%cr0,%0" : "=r" (val));
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return val;
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}
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static __inline u_int
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rcr2(void)
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{
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u_int val;
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__asm __volatile("movl %%cr2,%0" : "=r" (val));
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return val;
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}
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static __inline void
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lcr3(u_int val)
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{
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__asm __volatile("movl %0,%%cr3" : : "r" (val));
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}
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static __inline u_int
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rcr3(void)
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{
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u_int val;
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__asm __volatile("movl %%cr3,%0" : "=r" (val));
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return val;
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}
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static __inline void
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lcr4(u_int val)
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{
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__asm __volatile("movl %0,%%cr4" : : "r" (val));
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}
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static __inline u_int
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rcr4(void)
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{
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u_int val;
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__asm __volatile("movl %%cr4,%0" : "=r" (val));
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return val;
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}
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static __inline void
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tlbflush(void)
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{
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u_int val;
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__asm __volatile("movl %%cr3,%0" : "=r" (val));
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__asm __volatile("movl %0,%%cr3" : : "r" (val));
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}
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#ifdef notyet
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void setidt __P((int idx, /*XXX*/caddr_t func, int typ, int dpl));
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#endif
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/* XXXX ought to be in psl.h with spl() functions */
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static __inline void
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disable_intr(void)
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{
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__asm __volatile("cli");
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}
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static __inline void
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enable_intr(void)
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{
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__asm __volatile("sti");
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}
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static __inline u_long
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read_eflags(void)
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{
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u_long ef;
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__asm __volatile("pushfl; popl %0" : "=r" (ef));
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return (ef);
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}
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static __inline void
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write_eflags(u_long ef)
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{
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__asm __volatile("pushl %0; popfl" : : "r" (ef));
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}
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/* Break into DDB/KGDB. */
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static __inline void
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breakpoint(void)
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{
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__asm __volatile("int $3");
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}
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#endif /* _KERNEL */
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#endif /* !_I386_CPUFUNC_H_ */
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