cpufunc.h revision 192109 
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 192109 2009-05-14 16:48:25Z raj $
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 breakpoint(void);
53#else
54static __inline void
55breakpoint(void)
56{
57
58	return;
59}
60#endif
61
62/* CPU register mangling inlines */
63
64static __inline void
65mtmsr(register_t value)
66{
67
68	__asm __volatile ("mtmsr %0; isync" :: "r"(value));
69}
70
71static __inline register_t
72mfmsr(void)
73{
74	register_t	value;
75
76	__asm __volatile ("mfmsr %0" : "=r"(value));
77
78	return (value);
79}
80
81static __inline void
82mtsrin(vm_offset_t va, register_t value)
83{
84
85	__asm __volatile ("mtsrin %0,%1" :: "r"(value), "r"(va));
86}
87
88static __inline register_t
89mfsrin(vm_offset_t va)
90{
91	register_t	value;
92
93	__asm __volatile ("mfsrin %0,%1" : "=r"(value) : "r"(va));
94
95	return (value);
96}
97
98static __inline void
99mtdec(register_t value)
100{
101
102	__asm __volatile ("mtdec %0" :: "r"(value));
103}
104
105static __inline register_t
106mfdec(void)
107{
108	register_t	value;
109
110	__asm __volatile ("mfdec %0" : "=r"(value));
111
112	return (value);
113}
114
115static __inline register_t
116mfpvr(void)
117{
118	register_t value;
119
120	__asm __volatile ("mfpvr %0" : "=r"(value));
121
122	return (value);
123}
124
125static __inline u_quad_t
126mftb(void)
127{
128	u_quad_t tb;
129	uint32_t *tbup = (uint32_t *)&tb;
130	uint32_t *tblp = tbup + 1;
131
132	do {
133		*tbup = mfspr(TBR_TBU);
134		*tblp = mfspr(TBR_TBL);
135	} while (*tbup != mfspr(TBR_TBU));
136
137	return (tb);
138}
139
140static __inline void
141mttb(u_quad_t time)
142{
143
144	mtspr(TBR_TBWL, 0);
145	mtspr(TBR_TBWU, (uint32_t)(time >> 32));
146	mtspr(TBR_TBWL, (uint32_t)(time & 0xffffffff));
147}
148
149static __inline void
150eieio(void)
151{
152
153	__asm __volatile ("eieio");
154}
155
156static __inline void
157isync(void)
158{
159
160	__asm __volatile ("isync");
161}
162
163static __inline void
164powerpc_sync(void)
165{
166
167	__asm __volatile ("sync");
168}
169
170static __inline register_t
171intr_disable(void)
172{
173	register_t	msr;
174
175	msr = mfmsr();
176	mtmsr(msr & ~PSL_EE);
177	return (msr);
178}
179
180static __inline void
181intr_restore(register_t msr)
182{
183
184	mtmsr(msr);
185}
186
187static __inline struct pcpu *
188powerpc_get_pcpup(void)
189{
190	struct pcpu	*ret;
191
192	__asm __volatile("mfsprg %0, 0" : "=r"(ret));
193
194	return(ret);
195}
196
197#endif /* _KERNEL */
198
199#endif /* !_MACHINE_CPUFUNC_H_ */
200