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_ */
145