cpufunc.h revision 3098 
1/*-
2 * Copyright (c) 1993 The Regents of the University of California.
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 *    notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 *    notice, this list of conditions and the following disclaimer in the
12 *    documentation and/or other materials provided with the distribution.
13 * 3. All advertising materials mentioning features or use of this software
14 *    must display the following acknowledgement:
15 *	This product includes software developed by the University of
16 *	California, Berkeley and its contributors.
17 * 4. Neither the name of the University nor the names of its contributors
18 *    may be used to endorse or promote products derived from this software
19 *    without specific prior written permission.
20 *
21 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
24 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
31 * SUCH DAMAGE.
32 *
33 *	$Id: cpufunc.h,v 1.24 1994/09/16 13:33:30 davidg Exp $
34 */
35
36/*
37 * Functions to provide access to special i386 instructions.
38 * XXX - bezillions more are defined in locore.s but are not declared anywhere.
39 */
40
41#ifndef _MACHINE_CPUFUNC_H_
42#define _MACHINE_CPUFUNC_H_ 1
43
44#include <sys/cdefs.h>
45#include <sys/types.h>
46
47#include <machine/spl.h>
48
49#ifdef	__GNUC__
50
51static inline u_char
52inb(u_short port)
53{
54	u_char data;
55
56	__asm __volatile("inb %1,%0" : "=a" (data) : "d" (port));
57	return data;
58}
59
60static inline u_short
61inw(u_short port)
62{
63	u_short data;
64
65	__asm __volatile("inw %1,%0" : "=a" (data) : "d" (port));
66	return data;
67}
68
69static inline u_long
70inl(u_short port)
71{
72	u_long data;
73
74	__asm __volatile("inl %1,%0" : "=a" (data) : "d" (port));
75	return data;
76}
77
78static inline void
79outb(u_short port, u_char val)
80{
81	__asm __volatile("outb %0,%1" : :"a" (val), "d" (port));
82}
83
84static inline void
85outw(u_short port, u_short val)
86{
87	__asm __volatile("outw %0,%1" : :"a" (val), "d" (port));
88}
89
90static inline void
91outl(u_short port, u_long val)
92{
93	__asm __volatile("outl %0,%1" : :"a" (val), "d" (port));
94}
95
96static inline int bdb(void)
97{
98	extern int bdb_exists;
99
100	if (!bdb_exists)
101		return (0);
102	__asm("int $3");
103	return (1);
104}
105
106static inline void
107disable_intr(void)
108{
109	__asm __volatile("cli");
110}
111
112static inline void
113enable_intr(void)
114{
115	__asm __volatile("sti");
116}
117
118static inline u_long
119read_eflags()
120{
121	u_long ef;
122	__asm __volatile("pushf; popl %0" : "=a" (ef));
123	return(ef);
124}
125
126static inline void
127write_eflags(u_long ef)
128{
129	__asm __volatile("pushl %0; popf" : : "a" ((u_long) ef));
130}
131
132static inline void
133pmap_update()
134{
135	__asm __volatile("movl %%cr3, %%eax; movl %%eax, %%cr3" : : : "ax");
136}
137
138static inline u_long
139rcr2()
140{
141	u_long	data;
142	__asm __volatile("movl %%cr2,%%eax" : "=a" (data));
143	return data;
144}
145
146struct quehead {
147	struct quehead *qh_link;
148	struct quehead *qh_rlink;
149};
150
151static inline void
152insque(void *a, void *b)
153{
154	register struct quehead *element = a, *head = b;
155	element->qh_link = head->qh_link;
156	head->qh_link = (struct quehead *)element;
157	element->qh_rlink = (struct quehead *)head;
158	((struct quehead *)(element->qh_link))->qh_rlink
159	  = (struct quehead *)element;
160}
161
162static inline void
163remque(void *a)
164{
165	register struct quehead *element = a;
166	((struct quehead *)(element->qh_link))->qh_rlink = element->qh_rlink;
167	((struct quehead *)(element->qh_rlink))->qh_link = element->qh_link;
168	element->qh_rlink = 0;
169}
170
171#else /* not __GNUC__ */
172extern	void insque __P((void *, void *));
173extern	void remque __P((void *));
174
175int	bdb		__P((void));
176void	disable_intr	__P((void));
177void	enable_intr	__P((void));
178u_char	inb		__P((u_int port));
179void	outb		__P((u_int port, u_int data));	/* XXX - incompat */
180
181#endif	/* __GNUC__ */
182
183void	load_cr0	__P((u_int cr0));
184u_int	rcr0	__P((void));
185void load_cr3(u_long);
186u_long rcr3(void);
187extern void DELAY(int);
188
189void	setidt	__P((int, void (*)(), int, int));
190extern u_long kvtop(void *);
191extern void * outsb(int /*u_short*/, void *, size_t);
192extern void * outsw(int /*u_short*/, void *, size_t);
193extern void * outsl(int /*u_short*/, void *, size_t);
194extern void * insb(int /*u_short*/, void *, size_t);
195extern void * insw(int /*u_short*/, void *, size_t);
196extern void * insl(int /*u_short*/, void *, size_t);
197extern void fillw(int /*u_short*/, void *, size_t);
198extern void filli(int, void *, size_t);
199
200#endif /* _MACHINE_CPUFUNC_H_ */
201