142 lines
4.0 KiB
C
142 lines
4.0 KiB
C
/*-
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* Copyright (c) 1993 The Regents of the University of California.
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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 the University of
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* California, Berkeley and its contributors.
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* 4. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* $Id$
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*/
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/*
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* Functions to provide access to special i386 instructions.
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* XXX - bezillions more are defined in locore.s but are not declared anywhere.
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*/
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#ifndef _MACHINE_CPUFUNC_H_
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#define _MACHINE_CPUFUNC_H_ 1
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#include <sys/cdefs.h>
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#include <sys/types.h>
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#include "machine/spl.h"
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#ifdef __GNUC__
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static inline int bdb(void)
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{
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extern int bdb_exists;
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if (!bdb_exists)
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return (0);
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__asm("int $3");
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return (1);
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}
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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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/*
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* This roundabout method of returning a u_char helps stop gcc-1.40 from
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* generating unnecessary movzbl's.
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*/
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#define inb(port) ((u_char) u_int_inb(port))
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static inline u_int
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u_int_inb(u_int port)
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{
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u_char data;
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/*
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* We use %%dx and not %1 here because i/o is done at %dx and not at
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* %edx, while gcc-2.2.2 generates inferior code (movw instead of movl)
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* if we tell it to load (u_short) port.
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*/
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__asm __volatile("inb %%dx,%0" : "=a" (data) : "d" (port));
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return data;
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}
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static inline void
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outb(u_int port, u_char data)
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{
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register u_char al asm("ax");
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al = data; /* help gcc-1.40's register allocator */
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__asm __volatile("outb %0,%%dx" : : "a" (al), "d" (port));
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}
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static inline void
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tlbflush()
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{
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__asm __volatile("movl %%cr3, %%eax; movl %%eax, %%cr3" : : : "ax");
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}
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static inline u_long
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rcr2()
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{
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u_long data;
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__asm __volatile("movl %%cr2,%%eax" : "=a" (data));
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return data;
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}
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#else /* not __GNUC__ */
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extern void insque __P((void *, void *));
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extern void remque __P((void *));
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int bdb __P((void));
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void disable_intr __P((void));
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void enable_intr __P((void));
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u_char inb __P((u_int port));
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void outb __P((u_int port, u_int data)); /* XXX - incompat */
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#endif /* __GNUC__ */
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void load_cr0 __P((u_int cr0));
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u_int rcr0 __P((void));
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void load_cr3(u_long);
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u_long rcr3(void);
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void setidt __P((int, void (*)(), int, int));
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extern u_long kvtop(void *);
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extern void outw(int /*u_short*/, int /*u_short*/); /* XXX inline!*/
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extern void outsb(int /*u_short*/, void *, size_t);
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extern void outsw(int /*u_short*/, void *, size_t);
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extern void insw(int /*u_short*/, void *, size_t);
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extern void fillw(int /*u_short*/, void *, size_t);
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extern void filli(int, void *, size_t);
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#endif /* _MACHINE_CPUFUNC_H_ */
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