cpufunc.h revision 178618 
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 178618 2008-04-27 17:13:22Z marcel $
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#include <machine/spr.h>
48
49struct thread;
50
51#ifdef KDB
52void ppc_db_trap(void);
53#endif
54
55static __inline void
56breakpoint(void)
57{
58#ifdef KDB
59	ppc_db_trap();
60#endif
61}
62
63/* CPU register mangling inlines */
64
65static __inline void
66mtmsr(register_t value)
67{
68
69	__asm __volatile ("mtmsr %0; isync" :: "r"(value));
70}
71
72static __inline register_t
73mfmsr(void)
74{
75	register_t	value;
76
77	__asm __volatile ("mfmsr %0" : "=r"(value));
78
79	return (value);
80}
81
82static __inline void
83mtsrin(vm_offset_t va, register_t value)
84{
85
86	__asm __volatile ("mtsrin %0,%1" :: "r"(value), "r"(va));
87}
88
89static __inline register_t
90mfsrin(vm_offset_t va)
91{
92	register_t	value;
93
94	__asm __volatile ("mfsrin %0,%1" : "=r"(value) : "r"(va));
95
96	return (value);
97}
98
99static __inline void
100mtdec(register_t value)
101{
102
103	__asm __volatile ("mtdec %0" :: "r"(value));
104}
105
106static __inline register_t
107mfdec(void)
108{
109	register_t	value;
110
111	__asm __volatile ("mfdec %0" : "=r"(value));
112
113	return (value);
114}
115
116static __inline register_t
117mfpvr(void)
118{
119	register_t	value;
120
121	__asm __volatile ("mfpvr %0" : "=r"(value));
122
123	return (value);
124}
125
126static __inline void
127eieio(void)
128{
129
130	__asm __volatile ("eieio");
131}
132
133static __inline void
134isync(void)
135{
136
137	__asm __volatile ("isync");
138}
139
140static __inline register_t
141intr_disable(void)
142{
143	register_t	msr;
144
145	msr = mfmsr();
146	mtmsr(msr & ~PSL_EE);
147	return (msr);
148}
149
150static __inline void
151intr_restore(register_t msr)
152{
153
154	mtmsr(msr);
155}
156
157static __inline void
158restore_intr(unsigned int msr)
159{
160
161	mtmsr(msr);
162}
163
164static __inline struct pcpu *
165powerpc_get_pcpup(void)
166{
167	struct pcpu	*ret;
168
169	__asm ("mfsprg %0, 0" : "=r"(ret));
170
171	return(ret);
172}
173
174#endif /* _KERNEL */
175
176#endif /* !_MACHINE_CPUFUNC_H_ */
177