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
39struct 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
73struct pcb;
74struct pcpu;
75
76extern 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
90static inline struct thread *
91get_curthread(void)
92{
93 void *ret;
94
95 __asm __volatile("mrc p15, 0, %0, c13, c0, 4" : "=r" (ret));
96 return (ret);
97}
98
99static inline void
100set_curthread(struct thread *td)
101{
102
103 __asm __volatile("mcr p15, 0, %0, c13, c0, 4" : : "r" (td));
104}
105
106static inline void *
107get_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
116static inline void
117set_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
141void pcpu0_init(void);
142#endif /* _KERNEL */
143
144#endif /* !_MACHINE_PCPU_H_ */