1 /*-
2 * SPDX-License-Identifier: BSD-2-Clause
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 */
30
31 #ifndef _MACHINE_PCPU_H_
32 #define _MACHINE_PCPU_H_
33
34 #ifdef _KERNEL
35
36 #include <sys/_lock.h>
37 #include <sys/_mutex.h>
38
39 struct vmspace;
40
41 #endif /* _KERNEL */
42
43 /* Branch predictor hardening method */
44 #define PCPU_BP_HARDEN_KIND_NONE 0
45 #define PCPU_BP_HARDEN_KIND_BPIALL 1
46 #define PCPU_BP_HARDEN_KIND_ICIALLU 2
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 int pc_bp_harden_kind; \
63 uint32_t pc_original_actlr; \
64 uint64_t pc_clock; \
65 uint32_t pc_mpidr; \
66 char __pad[135]
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 #define CPU_MASK (0xf)
79
80 #ifndef SMP
81 #define get_pcpu() (pcpup)
82 #else
83 #define get_pcpu() __extension__ ({ \
84 int id; \
85 __asm __volatile("mrc p15, 0, %0, c0, c0, 5" : "=r" (id)); \
86 (pcpup + (id & CPU_MASK)); \
87 })
88 #endif
89
90 static inline struct thread *
get_curthread(void)91 get_curthread(void)
92 {
93 void *ret;
94
95 __asm __volatile("mrc p15, 0, %0, c13, c0, 4" : "=r" (ret));
96 return (ret);
97 }
98
99 static inline void
set_curthread(struct thread * td)100 set_curthread(struct thread *td)
101 {
102
103 __asm __volatile("mcr p15, 0, %0, c13, c0, 4" : : "r" (td));
104 }
105
106 static inline void *
get_tls(void)107 get_tls(void)
108 {
109 void *tls;
110
111 /* TPIDRURW contains the authoritative value. */
112 __asm __volatile("mrc p15, 0, %0, c13, c0, 2" : "=r" (tls));
113 return (tls);
114 }
115
116 static inline void
set_tls(void * tls)117 set_tls(void *tls)
118 {
119
120 /*
121 * Update both TPIDRURW and TPIDRURO. TPIDRURW needs to be written
122 * first to ensure that a context switch between the two writes will
123 * still give the desired result of updating both.
124 */
125 __asm __volatile(
126 "mcr p15, 0, %0, c13, c0, 2\n"
127 "mcr p15, 0, %0, c13, c0, 3\n"
128 : : "r" (tls));
129 }
130
131 #define curthread get_curthread()
132
133
134 #define PCPU_GET(member) (get_pcpu()->pc_ ## member)
135 #define PCPU_ADD(member, value) (get_pcpu()->pc_ ## member += (value))
136 #define PCPU_PTR(member) (&get_pcpu()->pc_ ## member)
137 #define PCPU_SET(member,value) (get_pcpu()->pc_ ## member = (value))
138
139 #define PCPU_GET_MPIDR(pc) ((pc)->pc_mpidr)
140
141 void pcpu0_init(void);
142 #endif /* _KERNEL */
143
144 #endif /* !_MACHINE_PCPU_H_ */
145