cpufunc.h revision 111267 
1/*-
2 * Copyright (c) 1998 Doug Rabson
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 *
14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
17 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
24 * SUCH DAMAGE.
25 *
26 * $FreeBSD: head/sys/powerpc/include/cpufunc.h 111267 2003-02-22 22:58:13Z grehan $
27 */
28
29#ifndef _MACHINE_CPUFUNC_H_
30#define	_MACHINE_CPUFUNC_H_
31
32/*
33 * Required for user-space atomic.h includes
34 */
35static __inline void
36powerpc_mb(void)
37{
38
39	__asm __volatile("eieio; sync" : : : "memory");
40}
41
42#ifdef _KERNEL
43
44#include <sys/types.h>
45
46#include <machine/psl.h>
47
48struct thread;
49
50#ifdef __GNUC__
51
52static __inline void
53breakpoint(void)
54{
55
56	return;
57}
58
59#endif
60
61/* CPU register mangling inlines */
62
63static __inline void
64mtmsr(register_t value)
65{
66
67	__asm __volatile ("mtmsr %0" :: "r"(value));
68}
69
70static __inline register_t
71mfmsr(void)
72{
73	register_t	value;
74
75	__asm __volatile ("mfmsr %0" : "=r"(value));
76
77	return (value);
78}
79
80static __inline void
81mtsrin(vm_offset_t va, register_t value)
82{
83
84	__asm __volatile ("mtsrin %0,%1" :: "r"(value), "r"(va));
85}
86
87static __inline register_t
88mfsrin(vm_offset_t va)
89{
90	register_t	value;
91
92	__asm __volatile ("mfsrin %0,%1" : "=r"(value) : "r"(va));
93
94	return (value);
95}
96
97static __inline void
98mtdec(register_t value)
99{
100
101	__asm __volatile ("mtdec %0" :: "r"(value));
102}
103
104static __inline register_t
105mfdec(void)
106{
107	register_t	value;
108
109	__asm __volatile ("mfdec %0" : "=r"(value));
110
111	return (value);
112}
113
114static __inline register_t
115mfpvr(void)
116{
117	register_t	value;
118
119	__asm __volatile ("mfpvr %0" : "=r"(value));
120
121	return (value);
122}
123
124static __inline void
125eieio(void)
126{
127
128	__asm __volatile ("eieio");
129}
130
131static __inline void
132isync(void)
133{
134
135	__asm __volatile ("isync");
136}
137
138static __inline register_t
139intr_disable(void)
140{
141	register_t	msr;
142
143	msr = mfmsr();
144	mtmsr(msr & ~PSL_EE);
145	return (msr);
146}
147
148static __inline void
149intr_restore(register_t msr)
150{
151
152	mtmsr(msr);
153}
154
155static __inline void
156restore_intr(unsigned int msr)
157{
158
159	mtmsr(msr);
160}
161
162static __inline void
163powerpc_mb(void)
164{
165
166	__asm __volatile("eieio; sync" : : : "memory");
167}
168
169static __inline struct pcpu *
170powerpc_get_pcpup(void)
171{
172	struct pcpu	*ret;
173
174	__asm ("mfsprg %0, 0" : "=r"(ret));
175
176	return(ret);
177}
178
179#endif /* _KERNEL */
180
181#endif /* !_MACHINE_CPUFUNC_H_ */
182