cpufunc.h revision 234589 
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 234589 2012-04-22 21:55:19Z nwhitehorn $
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#include <machine/spr.h>
38
39struct thread;
40
41#ifdef KDB
42void breakpoint(void);
43#else
44static __inline void
45breakpoint(void)
46{
47
48	return;
49}
50#endif
51
52/* CPU register mangling inlines */
53
54static __inline void
55mtmsr(register_t value)
56{
57
58	__asm __volatile ("mtmsr %0; isync" :: "r"(value));
59}
60
61#ifdef __powerpc64__
62static __inline void
63mtmsrd(register_t value)
64{
65
66	__asm __volatile ("mtmsrd %0; isync" :: "r"(value));
67}
68#endif
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
80#ifndef __powerpc64__
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#endif
98
99static __inline register_t
100mfctrl(void)
101{
102	register_t value;
103
104	__asm __volatile ("mfspr %0,136" : "=r"(value));
105
106	return (value);
107}
108
109
110static __inline void
111mtdec(register_t value)
112{
113
114	__asm __volatile ("mtdec %0" :: "r"(value));
115}
116
117static __inline register_t
118mfdec(void)
119{
120	register_t value;
121
122	__asm __volatile ("mfdec %0" : "=r"(value));
123
124	return (value);
125}
126
127static __inline register_t
128mfpvr(void)
129{
130	register_t value;
131
132	__asm __volatile ("mfpvr %0" : "=r"(value));
133
134	return (value);
135}
136
137static __inline u_quad_t
138mftb(void)
139{
140	u_quad_t tb;
141      #ifdef __powerpc64__
142	__asm __volatile ("mftb %0" : "=r"(tb));
143      #else
144	uint32_t *tbup = (uint32_t *)&tb;
145	uint32_t *tblp = tbup + 1;
146
147	do {
148		*tbup = mfspr(TBR_TBU);
149		*tblp = mfspr(TBR_TBL);
150	} while (*tbup != mfspr(TBR_TBU));
151      #endif
152
153	return (tb);
154}
155
156static __inline void
157mttb(u_quad_t time)
158{
159
160	mtspr(TBR_TBWL, 0);
161	mtspr(TBR_TBWU, (uint32_t)(time >> 32));
162	mtspr(TBR_TBWL, (uint32_t)(time & 0xffffffff));
163}
164
165static __inline void
166eieio(void)
167{
168
169	__asm __volatile ("eieio" : : : "memory");
170}
171
172static __inline void
173isync(void)
174{
175
176	__asm __volatile ("isync" : : : "memory");
177}
178
179static __inline void
180powerpc_sync(void)
181{
182
183	__asm __volatile ("sync" : : : "memory");
184}
185
186static __inline register_t
187intr_disable(void)
188{
189	register_t msr;
190
191	msr = mfmsr();
192	mtmsr(msr & ~PSL_EE);
193	return (msr);
194}
195
196static __inline void
197intr_restore(register_t msr)
198{
199
200	mtmsr(msr);
201}
202
203static __inline struct pcpu *
204powerpc_get_pcpup(void)
205{
206	struct pcpu *ret;
207
208	__asm __volatile("mfsprg %0, 0" : "=r"(ret));
209
210	return (ret);
211}
212
213#endif /* _KERNEL */
214
215#endif /* !_MACHINE_CPUFUNC_H_ */
216