pcpu.h revision 284109 
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: head/sys/arm/include/pcpu.h 284109 2015-06-07 10:50:15Z andrew $
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
39struct vmspace;
40
41#endif	/* _KERNEL */
42
43#ifdef VFP
44#define PCPU_MD_FIELDS							\
45	unsigned int pc_vfpsid;						\
46	unsigned int pc_vfpmvfr0;					\
47	unsigned int pc_vfpmvfr1;					\
48	struct pmap *pc_curpmap;					\
49	char __pad[141]
50#else
51#define PCPU_MD_FIELDS							\
52	char __pad[157]
53#endif
54
55#ifdef _KERNEL
56
57struct pcb;
58struct pcpu;
59
60extern struct pcpu *pcpup;
61#if ARM_ARCH_6 || ARM_ARCH_7A
62/* or ARM_TP_ADDRESS 	mark REMOVE ME NOTE */
63
64#define CPU_MASK (0xf)
65
66#ifndef SMP
67#define get_pcpu() (pcpup)
68#else
69#define get_pcpu() __extension__ ({			  		\
70    	int id;								\
71        __asm __volatile("mrc p15, 0, %0, c0, c0, 5" : "=r" (id));	\
72    	(pcpup + (id & CPU_MASK));					\
73    })
74#endif
75
76static inline struct thread *
77get_curthread(void)
78{
79	void *ret;
80
81	__asm __volatile("mrc p15, 0, %0, c13, c0, 4" : "=r" (ret));
82	return (ret);
83}
84
85static inline void
86set_curthread(struct thread *td)
87{
88
89	__asm __volatile("mcr p15, 0, %0, c13, c0, 4" : : "r" (td));
90}
91
92
93static inline void *
94get_tls(void)
95{
96	void *tls;
97
98	__asm __volatile("mrc p15, 0, %0, c13, c0, 3" : "=r" (tls));
99	return (tls);
100}
101
102static inline void
103set_tls(void *tls)
104{
105
106	__asm __volatile("mcr p15, 0, %0, c13, c0, 3" : : "r" (tls));
107}
108
109#define curthread get_curthread()
110
111#else
112#define get_pcpu()	pcpup
113#endif
114
115#define	PCPU_GET(member)	(get_pcpu()->pc_ ## member)
116#define	PCPU_ADD(member, value)	(get_pcpu()->pc_ ## member += (value))
117#define	PCPU_INC(member)	PCPU_ADD(member, 1)
118#define	PCPU_PTR(member)	(&get_pcpu()->pc_ ## member)
119#define	PCPU_SET(member,value)	(get_pcpu()->pc_ ## member = (value))
120
121void pcpu0_init(void);
122#endif	/* _KERNEL */
123
124#endif	/* !_MACHINE_PCPU_H_ */
125