cpufunc.h revision 94834 
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 94834 2002-04-16 11:45:09Z 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 void
105isync(void)
106{
107
108	__asm __volatile ("isync");
109}
110
111static __inline register_t
112intr_disable(void)
113{
114	register_t	msr;
115
116	msr = mfmsr();
117	mtmsr(msr & ~(PSL_EE|PSL_RI));
118	return (msr);
119}
120
121static __inline void
122intr_restore(register_t msr)
123{
124
125	mtmsr(msr);
126}
127
128static __inline void
129restore_intr(unsigned int msr)
130{
131
132	mtmsr(msr);
133}
134
135static __inline void
136powerpc_mb(void)
137{
138
139	__asm __volatile("eieio; sync" : : : "memory");
140}
141
142static __inline struct pcpu *
143powerpc_get_pcpup(void)
144{
145	struct pcpu	*ret;
146
147	__asm ("mfsprg %0, 0" : "=r"(ret));
148
149	return(ret);
150}
151
152#endif /* _KERNEL */
153
154#endif /* !_MACHINE_CPUFUNC_H_ */
155