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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/acle-compat.h>
36 #include <machine/cpuconf.h>
37
38 #define ALT_STACK_SIZE  128
39
40 struct 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
62 struct pcb;
63 struct pcpu;
64
65 extern 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         
80 static inline struct thread *
81 get_curthread(void)
82 {
83         void *ret;
84
85         __asm __volatile("mrc p15, 0, %0, c13, c0, 4" : "=r" (ret));
86         return (ret);
87 }
88
89 static inline void
90 set_curthread(struct thread *td)
91 {
92
93         __asm __volatile("mcr p15, 0, %0, c13, c0, 4" : : "r" (td));
94 }
95
96
97 static inline void *
98 get_tls(void)
99 {
100         void *tls;
101
102         __asm __volatile("mrc p15, 0, %0, c13, c0, 3" : "=r" (tls));
103         return (tls);
104 }
105
106 static inline void
107 set_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
125 void pcpu0_init(void);
126 #endif  /* _KERNEL */
127
128 #endif  /* !_MACHINE_PCPU_H_ */