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MFV r328251: 8652 Tautological comparisons with ZPROP_INVAL
[FreeBSD/FreeBSD.git] / sys / arm / include / pcpu.h
1 /*-
2  * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
3  *
4  * Copyright (c) 1999 Luoqi Chen <luoqi@freebsd.org>
5  * All rights reserved.
6  *
7  * Redistribution and use in source and binary forms, with or without
8  * modification, are permitted provided that the following conditions
9  * are met:
10  * 1. Redistributions of source code must retain the above copyright
11  *    notice, this list of conditions and the following disclaimer.
12  * 2. Redistributions in binary form must reproduce the above copyright
13  *    notice, this list of conditions and the following disclaimer in the
14  *    documentation and/or other materials provided with the distribution.
15  *
16  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
17  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
18  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
19  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
20  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
21  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
22  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
23  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
24  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
25  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
26  * SUCH DAMAGE.
27  *
28  *      from: FreeBSD: src/sys/i386/include/globaldata.h,v 1.27 2001/04/27
29  * $FreeBSD$
30  */
31
32 #ifndef _MACHINE_PCPU_H_
33 #define _MACHINE_PCPU_H_
34
35 #ifdef _KERNEL
36
37 #include <sys/_lock.h>
38 #include <sys/_mutex.h>
39
40 #define ALT_STACK_SIZE  128
41
42 struct vmspace;
43
44 #endif  /* _KERNEL */
45
46 #if __ARM_ARCH >= 6
47
48 #define PCPU_MD_FIELDS                                                  \
49         unsigned int pc_vfpsid;                                         \
50         unsigned int pc_vfpmvfr0;                                       \
51         unsigned int pc_vfpmvfr1;                                       \
52         struct pmap *pc_curpmap;                                        \
53         struct mtx pc_cmap_lock;                                        \
54         void *pc_cmap1_pte2p;                                           \
55         void *pc_cmap2_pte2p;                                           \
56         caddr_t pc_cmap1_addr;                                          \
57         caddr_t pc_cmap2_addr;                                          \
58         vm_offset_t pc_qmap_addr;                                       \
59         void *pc_qmap_pte2p;                                            \
60         unsigned int pc_dbreg[32];                                      \
61         int pc_dbreg_cmd;                                               \
62         char __pad[155]
63 #else
64 #define PCPU_MD_FIELDS                                                  \
65         char __pad[93]
66 #endif
67
68 #ifdef _KERNEL
69
70 #define PC_DBREG_CMD_NONE       0
71 #define PC_DBREG_CMD_LOAD       1
72
73 struct pcb;
74 struct pcpu;
75
76 extern struct pcpu *pcpup;
77
78 #if __ARM_ARCH >= 6
79 #define CPU_MASK (0xf)
80
81 #ifndef SMP
82 #define get_pcpu() (pcpup)
83 #else
84 #define get_pcpu() __extension__ ({                                     \
85         int id;                                                         \
86         __asm __volatile("mrc p15, 0, %0, c0, c0, 5" : "=r" (id));      \
87         (pcpup + (id & CPU_MASK));                                      \
88     })
89 #endif
90
91 static inline struct thread *
92 get_curthread(void)
93 {
94         void *ret;
95
96         __asm __volatile("mrc p15, 0, %0, c13, c0, 4" : "=r" (ret));
97         return (ret);
98 }
99
100 static inline void
101 set_curthread(struct thread *td)
102 {
103
104         __asm __volatile("mcr p15, 0, %0, c13, c0, 4" : : "r" (td));
105 }
106
107
108 static inline void *
109 get_tls(void)
110 {
111         void *tls;
112
113         /* TPIDRURW contains the authoritative value. */
114         __asm __volatile("mrc p15, 0, %0, c13, c0, 2" : "=r" (tls));
115         return (tls);
116 }
117
118 static inline void
119 set_tls(void *tls)
120 {
121
122         /*
123          * Update both TPIDRURW and TPIDRURO. TPIDRURW needs to be written
124          * first to ensure that a context switch between the two writes will
125          * still give the desired result of updating both.
126          */
127         __asm __volatile(
128             "mcr p15, 0, %0, c13, c0, 2\n"
129             "mcr p15, 0, %0, c13, c0, 3\n"
130              : : "r" (tls));
131 }
132
133 #define curthread get_curthread()
134
135 #else
136 #define get_pcpu()      pcpup
137 #endif
138
139 #define PCPU_GET(member)        (get_pcpu()->pc_ ## member)
140 #define PCPU_ADD(member, value) (get_pcpu()->pc_ ## member += (value))
141 #define PCPU_INC(member)        PCPU_ADD(member, 1)
142 #define PCPU_PTR(member)        (&get_pcpu()->pc_ ## member)
143 #define PCPU_SET(member,value)  (get_pcpu()->pc_ ## member = (value))
144
145 void pcpu0_init(void);
146 #endif  /* _KERNEL */
147
148 #endif  /* !_MACHINE_PCPU_H_ */