cpufunc.h revision 110384 
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 110384 2003-02-05 11:59:27Z benno $
27 */
28
29#ifndef _MACHINE_CPUFUNC_H_
30#define	_MACHINE_CPUFUNC_H_
31
32#ifdef _KERNEL
33
34#include <sys/types.h>
35
36#include <machine/psl.h>
37
38struct thread;
39
40#ifdef __GNUC__
41
42static __inline void
43breakpoint(void)
44{
45
46	return;
47}
48
49#endif
50
51/* CPU register mangling inlines */
52
53static __inline void
54mtmsr(register_t value)
55{
56
57	__asm __volatile ("mtmsr %0" :: "r"(value));
58}
59
60static __inline register_t
61mfmsr(void)
62{
63	register_t	value;
64
65	__asm __volatile ("mfmsr %0" : "=r"(value));
66
67	return (value);
68}
69
70static __inline void
71mtsrin(vm_offset_t va, register_t value)
72{
73
74	__asm __volatile ("mtsrin %0,%1" :: "r"(value), "r"(va));
75}
76
77static __inline register_t
78mfsrin(vm_offset_t va)
79{
80	register_t	value;
81
82	__asm __volatile ("mfsrin %0,%1" : "=r"(value) : "r"(va));
83
84	return (value);
85}
86
87static __inline void
88mtdec(register_t value)
89{
90
91	__asm __volatile ("mtdec %0" :: "r"(value));
92}
93
94static __inline register_t
95mfdec(void)
96{
97	register_t	value;
98
99	__asm __volatile ("mfdec %0" : "=r"(value));
100
101	return (value);
102}
103
104static __inline register_t
105mfpvr(void)
106{
107	register_t	value;
108
109	__asm __volatile ("mfpvr %0" : "=r"(value));
110
111	return (value);
112}
113
114static __inline void
115eieio(void)
116{
117
118	__asm __volatile ("eieio");
119}
120
121static __inline void
122isync(void)
123{
124
125	__asm __volatile ("isync");
126}
127
128static __inline register_t
129intr_disable(void)
130{
131	register_t	msr;
132
133	msr = mfmsr();
134	mtmsr(msr & ~PSL_EE);
135	return (msr);
136}
137
138static __inline void
139intr_restore(register_t msr)
140{
141
142	mtmsr(msr);
143}
144
145static __inline void
146restore_intr(unsigned int msr)
147{
148
149	mtmsr(msr);
150}
151
152static __inline void
153powerpc_mb(void)
154{
155
156	__asm __volatile("eieio; sync" : : : "memory");
157}
158
159static __inline struct pcpu *
160powerpc_get_pcpup(void)
161{
162	struct pcpu	*ret;
163
164	__asm ("mfsprg %0, 0" : "=r"(ret));
165
166	return(ret);
167}
168
169#endif /* _KERNEL */
170
171#endif /* !_MACHINE_CPUFUNC_H_ */
172