FreeBSD/Linux Kernel Cross Reference
sys/arm/include/pcpu.h
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: releng/10.2/sys/arm/include/pcpu.h 266277 2014-05-17 00:53:12Z 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
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 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
58 struct pcb;
59 struct pcpu;
60
61 extern 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
77 static inline struct thread *
78 get_curthread(void)
79 {
80 void *ret;
81
82 __asm __volatile("mrc p15, 0, %0, c13, c0, 4" : "=r" (ret));
83 return (ret);
84 }
85
86 static inline void
87 set_curthread(struct thread *td)
88 {
89
90 __asm __volatile("mcr p15, 0, %0, c13, c0, 4" : : "r" (td));
91 }
92
93
94 static inline void *
95 get_tls(void)
96 {
97 void *tls;
98
99 __asm __volatile("mrc p15, 0, %0, c13, c0, 3" : "=r" (tls));
100 return (tls);
101 }
102
103 static inline void
104 set_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
122 void pcpu0_init(void);
123 #endif /* _KERNEL */
124
125 #endif /* !_MACHINE_PCPU_H_ */
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