pcpu.h revision 286296 
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 286296 2015-08-04 19:46:13Z jah $
28 */
29
30#ifndef	_MACHINE_PCPU_H_
31#define	_MACHINE_PCPU_H_
32
33#ifdef _KERNEL
34
35#include <machine/acle-compat.h>
36#include <machine/cpuconf.h>
37
38#define	ALT_STACK_SIZE	128
39
40struct vmspace;
41
42#endif	/* _KERNEL */
43
44#if __ARM_ARCH >= 6
45#define PCPU_MD_FIELDS							\
46	unsigned int pc_vfpsid;						\
47	unsigned int pc_vfpmvfr0;					\
48	unsigned int pc_vfpmvfr1;					\
49	struct pmap *pc_curpmap;					\
50	vm_offset_t pc_qmap_addr;					\
51	void *pc_qmap_pte;						\
52	char __pad[133]
53#else
54#define PCPU_MD_FIELDS							\
55	vm_offset_t qmap_addr;						\
56	void *pc_qmap_pte;						\
57	char __pad[149]
58#endif
59
60#ifdef _KERNEL
61
62struct pcb;
63struct pcpu;
64
65extern struct pcpu *pcpup;
66
67#if __ARM_ARCH >= 6
68#define CPU_MASK (0xf)
69
70#ifndef SMP
71#define get_pcpu() (pcpup)
72#else
73#define get_pcpu() __extension__ ({			  		\
74    	int id;								\
75        __asm __volatile("mrc p15, 0, %0, c0, c0, 5" : "=r" (id));	\
76    	(pcpup + (id & CPU_MASK));					\
77    })
78#endif
79
80static inline struct thread *
81get_curthread(void)
82{
83	void *ret;
84
85	__asm __volatile("mrc p15, 0, %0, c13, c0, 4" : "=r" (ret));
86	return (ret);
87}
88
89static inline void
90set_curthread(struct thread *td)
91{
92
93	__asm __volatile("mcr p15, 0, %0, c13, c0, 4" : : "r" (td));
94}
95
96
97static inline void *
98get_tls(void)
99{
100	void *tls;
101
102	__asm __volatile("mrc p15, 0, %0, c13, c0, 3" : "=r" (tls));
103	return (tls);
104}
105
106static inline void
107set_tls(void *tls)
108{
109
110	__asm __volatile("mcr p15, 0, %0, c13, c0, 3" : : "r" (tls));
111}
112
113#define curthread get_curthread()
114
115#else
116#define get_pcpu()	pcpup
117#endif
118
119#define	PCPU_GET(member)	(get_pcpu()->pc_ ## member)
120#define	PCPU_ADD(member, value)	(get_pcpu()->pc_ ## member += (value))
121#define	PCPU_INC(member)	PCPU_ADD(member, 1)
122#define	PCPU_PTR(member)	(&get_pcpu()->pc_ ## member)
123#define	PCPU_SET(member,value)	(get_pcpu()->pc_ ## member = (value))
124
125void pcpu0_init(void);
126#endif	/* _KERNEL */
127
128#endif	/* !_MACHINE_PCPU_H_ */
129