pcpu.h revision 262941 
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 262941 2014-03-09 03:00:03Z ian $
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_cpu;						\
46	unsigned int pc_vfpsid;						\
47	unsigned int pc_vfpmvfr0;					\
48	unsigned int pc_vfpmvfr1;					\
49	struct pmap *pc_curpmap;					\
50	char __pad[137]
51#else
52#define PCPU_MD_FIELDS							\
53	char __pad[157]
54#endif
55
56#ifdef _KERNEL
57
58struct pcb;
59struct pcpu;
60
61extern struct pcpu *pcpup;
62#if ARM_ARCH_6 || ARM_ARCH_7A
63/* or ARM_TP_ADDRESS 	mark REMOVE ME NOTE */
64
65#define CPU_MASK (0xf)
66
67#ifndef SMP
68#define get_pcpu() (pcpup)
69#else
70#define get_pcpu() __extension__ ({			  		\
71    	int id;								\
72        __asm __volatile("mrc p15, 0, %0, c0, c0, 5" : "=r" (id));	\
73    	(pcpup + (id & CPU_MASK));					\
74    })
75#endif
76
77static inline struct thread *
78get_curthread(void)
79{
80	void *ret;
81
82	__asm __volatile("mrc p15, 0, %0, c13, c0, 4" : "=r" (ret));
83	return (ret);
84}
85
86static inline void
87set_curthread(struct thread *td)
88{
89
90	__asm __volatile("mcr p15, 0, %0, c13, c0, 4" : : "r" (td));
91}
92
93
94static inline void *
95get_tls(void)
96{
97	void *tls;
98
99	__asm __volatile("mrc p15, 0, %0, c13, c0, 3" : "=r" (tls));
100	return (tls);
101}
102
103static inline void
104set_tls(void *tls)
105{
106
107	__asm __volatile("mcr p15, 0, %0, c13, c0, 3" : : "r" (tls));
108}
109
110#define curthread get_curthread()
111
112#else
113#define get_pcpu()	pcpup
114#endif
115
116#define	PCPU_GET(member)	(get_pcpu()->pc_ ## member)
117#define	PCPU_ADD(member, value)	(get_pcpu()->pc_ ## member += (value))
118#define	PCPU_INC(member)	PCPU_ADD(member, 1)
119#define	PCPU_PTR(member)	(&get_pcpu()->pc_ ## member)
120#define	PCPU_SET(member,value)	(get_pcpu()->pc_ ## member = (value))
121
122void pcpu0_init(void);
123#endif	/* _KERNEL */
124
125#endif	/* !_MACHINE_PCPU_H_ */
126