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/*-
* Copyright (c) 1993 The Regents of the University of California.
* 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 the University of
* California, Berkeley and its contributors.
* 4. Neither the name of the University 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 REGENTS 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 REGENTS 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.
*
* $Id: cpufunc.h,v 1.14 1994/08/04 19:46:57 davidg Exp $
*/
/*
* Functions to provide access to special i386 instructions.
* XXX - bezillions more are defined in locore.s but are not declared anywhere.
*/
#ifndef _MACHINE_CPUFUNC_H_
#define _MACHINE_CPUFUNC_H_ 1
#include <sys/cdefs.h>
#include <sys/types.h>
#include "machine/spl.h"
#ifdef __GNUC__
static inline int bdb(void)
{
extern int bdb_exists;
if (!bdb_exists)
return (0);
__asm("int $3");
return (1);
}
static inline void
disable_intr(void)
{
__asm __volatile("cli");
}
static inline void
enable_intr(void)
{
__asm __volatile("sti");
}
/*
* This roundabout method of returning a u_char helps stop gcc-1.40 from
* generating unnecessary movzbl's.
*/
#define inb(port) ((u_char) u_int_inb(port))
static inline u_int
u_int_inb(u_int port)
{
u_char data;
/*
* We use %%dx and not %1 here because i/o is done at %dx and not at
* %edx, while gcc-2.2.2 generates inferior code (movw instead of movl)
* if we tell it to load (u_short) port.
*/
__asm __volatile("inb %%dx,%0" : "=a" (data) : "d" (port));
return data;
}
static inline void
outb(u_int port, u_char data)
{
u_char al;
al = data; /* help gcc-1.40's register allocator */
__asm __volatile("outb %0,%%dx" : : "a" (al), "d" (port));
}
static inline void
tlbflush()
{
__asm __volatile("movl %%cr3, %%eax; movl %%eax, %%cr3" : : : "ax");
}
static inline u_long
rcr2()
{
u_long data;
__asm __volatile("movl %%cr2,%%eax" : "=a" (data));
return data;
}
struct quehead {
struct quehead *qh_link;
struct quehead *qh_rlink;
};
static inline void
insque(void *a, void *b)
{
register struct quehead *element = a, *head = b;
element->qh_link = head->qh_link;
head->qh_link = (struct quehead *)element;
element->qh_rlink = (struct quehead *)head;
((struct quehead *)(element->qh_link))->qh_rlink
= (struct quehead *)element;
}
static inline void
remque(void *a)
{
register struct quehead *element = a;
((struct quehead *)(element->qh_link))->qh_rlink = element->qh_rlink;
((struct quehead *)(element->qh_rlink))->qh_link = element->qh_link;
element->qh_rlink = 0;
}
#else /* not __GNUC__ */
extern void insque __P((void *, void *));
extern void remque __P((void *));
int bdb __P((void));
void disable_intr __P((void));
void enable_intr __P((void));
u_char inb __P((u_int port));
void outb __P((u_int port, u_int data)); /* XXX - incompat */
#endif /* __GNUC__ */
void load_cr0 __P((u_int cr0));
u_int rcr0 __P((void));
void load_cr3(u_long);
u_long rcr3(void);
void setidt __P((int, void (*)(), int, int));
extern u_long kvtop(void *);
extern void outw(int /*u_short*/, int /*u_short*/); /* XXX inline!*/
extern void outsb(int /*u_short*/, void *, size_t);
extern void outsw(int /*u_short*/, void *, size_t);
extern void insw(int /*u_short*/, void *, size_t);
extern void fillw(int /*u_short*/, void *, size_t);
extern void filli(int, void *, size_t);
#endif /* _MACHINE_CPUFUNC_H_ */
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