xref: /freebsd/sys/arm/include/pcpu.h (revision 4c9e27bd0a5f7fda85b0c0bf750575aee300a172)
1 /*-
2  * Copyright (c) 1999 Luoqi Chen <luoqi@freebsd.org>
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  *	from: FreeBSD: src/sys/i386/include/globaldata.h,v 1.27 2001/04/27
27  * $FreeBSD$
28  */
29 
30 #ifndef	_MACHINE_PCPU_H_
31 #define	_MACHINE_PCPU_H_
32 
33 #ifdef _KERNEL
34 
35 #include <machine/cpuconf.h>
36 
37 #define	ALT_STACK_SIZE	128
38 
39 struct vmspace;
40 
41 #endif	/* _KERNEL */
42 
43 #ifdef VFP
44 #define PCPU_MD_FIELDS							\
45 	unsigned int pc_cpu;						\
46 	unsigned int pc_vfpsid;						\
47 	unsigned int pc_vfpmvfr0;					\
48 	unsigned int pc_vfpmvfr1;					\
49 	struct thread *pc_vfpcthread;					\
50 	struct pmap *pc_curpmap;					\
51 	char __pad[133]
52 #else
53 #define PCPU_MD_FIELDS							\
54 	char __pad[157]
55 #endif
56 
57 #ifdef _KERNEL
58 
59 struct pcb;
60 struct pcpu;
61 
62 extern struct pcpu *pcpup;
63 #if ARM_ARCH_6 || ARM_ARCH_7A
64 /* or ARM_TP_ADDRESS 	mark REMOVE ME NOTE */
65 static inline struct pcpu *
66 get_pcpu(void)
67 {
68 	void *pcpu;
69 
70 	__asm __volatile("mrc p15, 0, %0, c13, c0, 4" : "=r" (pcpu));
71 	return (pcpu);
72 }
73 
74 static inline void
75 set_pcpu(void *pcpu)
76 {
77 
78 	__asm __volatile("mcr p15, 0, %0, c13, c0, 4" : : "r" (pcpu));
79 }
80 
81 static inline void *
82 get_tls(void)
83 {
84 	void *tls;
85 
86 	__asm __volatile("mrc p15, 0, %0, c13, c0, 3" : "=r" (tls));
87 	return (tls);
88 }
89 
90 static inline void
91 set_tls(void *tls)
92 {
93 
94 	__asm __volatile("mcr p15, 0, %0, c13, c0, 3" : : "r" (tls));
95 }
96 #else
97 #define get_pcpu()	pcpup
98 #endif
99 
100 #define	PCPU_GET(member)	(get_pcpu()->pc_ ## member)
101 #define	PCPU_ADD(member, value)	(get_pcpu()->pc_ ## member += (value))
102 #define	PCPU_INC(member)	PCPU_ADD(member, 1)
103 #define	PCPU_PTR(member)	(&get_pcpu()->pc_ ## member)
104 #define	PCPU_SET(member,value)	(get_pcpu()->pc_ ## member = (value))
105 
106 void pcpu0_init(void);
107 #endif	/* _KERNEL */
108 
109 #endif	/* !_MACHINE_PCPU_H_ */
110