FreeBSD/Linux Kernel Cross Reference
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: releng/12.0/sys/arm/include/pcpu.h 336476 2018-07-19 11:27:11Z manu $
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 /* Branch predictor hardening method */
48 #define PCPU_BP_HARDEN_KIND_NONE 0
49 #define PCPU_BP_HARDEN_KIND_BPIALL 1
50 #define PCPU_BP_HARDEN_KIND_ICIALLU 2
51
52 #define PCPU_MD_FIELDS \
53 unsigned int pc_vfpsid; \
54 unsigned int pc_vfpmvfr0; \
55 unsigned int pc_vfpmvfr1; \
56 struct pmap *pc_curpmap; \
57 struct mtx pc_cmap_lock; \
58 void *pc_cmap1_pte2p; \
59 void *pc_cmap2_pte2p; \
60 caddr_t pc_cmap1_addr; \
61 caddr_t pc_cmap2_addr; \
62 vm_offset_t pc_qmap_addr; \
63 void *pc_qmap_pte2p; \
64 unsigned int pc_dbreg[32]; \
65 int pc_dbreg_cmd; \
66 int pc_bp_harden_kind; \
67 uint32_t pc_original_actlr; \
68 uint64_t pc_clock; \
69 char __pad[139]
70 #else
71 #define PCPU_MD_FIELDS \
72 char __pad[93]
73 #endif
74
75 #ifdef _KERNEL
76
77 #define PC_DBREG_CMD_NONE 0
78 #define PC_DBREG_CMD_LOAD 1
79
80 struct pcb;
81 struct pcpu;
82
83 extern struct pcpu *pcpup;
84
85 #if __ARM_ARCH >= 6
86 #define CPU_MASK (0xf)
87
88 #ifndef SMP
89 #define get_pcpu() (pcpup)
90 #else
91 #define get_pcpu() __extension__ ({ \
92 int id; \
93 __asm __volatile("mrc p15, 0, %0, c0, c0, 5" : "=r" (id)); \
94 (pcpup + (id & CPU_MASK)); \
95 })
96 #endif
97
98 static inline struct thread *
99 get_curthread(void)
100 {
101 void *ret;
102
103 __asm __volatile("mrc p15, 0, %0, c13, c0, 4" : "=r" (ret));
104 return (ret);
105 }
106
107 static inline void
108 set_curthread(struct thread *td)
109 {
110
111 __asm __volatile("mcr p15, 0, %0, c13, c0, 4" : : "r" (td));
112 }
113
114
115 static inline void *
116 get_tls(void)
117 {
118 void *tls;
119
120 /* TPIDRURW contains the authoritative value. */
121 __asm __volatile("mrc p15, 0, %0, c13, c0, 2" : "=r" (tls));
122 return (tls);
123 }
124
125 static inline void
126 set_tls(void *tls)
127 {
128
129 /*
130 * Update both TPIDRURW and TPIDRURO. TPIDRURW needs to be written
131 * first to ensure that a context switch between the two writes will
132 * still give the desired result of updating both.
133 */
134 __asm __volatile(
135 "mcr p15, 0, %0, c13, c0, 2\n"
136 "mcr p15, 0, %0, c13, c0, 3\n"
137 : : "r" (tls));
138 }
139
140 #define curthread get_curthread()
141
142 #else
143 #define get_pcpu() pcpup
144 #endif
145
146 #define PCPU_GET(member) (get_pcpu()->pc_ ## member)
147 #define PCPU_ADD(member, value) (get_pcpu()->pc_ ## member += (value))
148 #define PCPU_INC(member) PCPU_ADD(member, 1)
149 #define PCPU_PTR(member) (&get_pcpu()->pc_ ## member)
150 #define PCPU_SET(member,value) (get_pcpu()->pc_ ## member = (value))
151
152 void pcpu0_init(void);
153 #endif /* _KERNEL */
154
155 #endif /* !_MACHINE_PCPU_H_ */
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