1/*-
2 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
3 *
4 * Copyright (c) 1999 Luoqi Chen <luoqi@freebsd.org>
5 * Copyright (c) Peter Wemm <peter@netplex.com.au>
6 * All rights reserved.
7 *
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
10 * are met:
11 * 1. Redistributions of source code must retain the above copyright
12 *    notice, this list of conditions and the following disclaimer.
13 * 2. Redistributions in binary form must reproduce the above copyright
14 *    notice, this list of conditions and the following disclaimer in the
15 *    documentation and/or other materials provided with the distribution.
16 *
17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
20 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
27 * SUCH DAMAGE.
28 *
29 *	from: src/sys/alpha/include/pcpu.h,v 1.15 2004/11/05 19:16:44 jhb
30 * $FreeBSD$
31 */
32
33#ifndef _MACHINE_PCPU_H_
34#define	_MACHINE_PCPU_H_
35
36#include <machine/cpufunc.h>
37#include <machine/pte.h>
38
39#define	PCPU_MD_COMMON_FIELDS						\
40	pd_entry_t	*pc_segbase;		/* curthread segbase */	\
41	struct	pmap	*pc_curpmap;		/* pmap of curthread */	\
42	u_int32_t	pc_next_asid;		/* next ASID to alloc */ \
43	u_int32_t	pc_asid_generation;	/* current ASID generation */ \
44	u_int		pc_pending_ipis;	/* IPIs pending to this CPU */ \
45	struct	pcpu	*pc_self;		/* globally-uniqe self pointer */
46
47#ifdef	__mips_n64
48#define	PCPU_MD_MIPS64_FIELDS						\
49	PCPU_MD_COMMON_FIELDS						\
50	char		__pad[245]
51#else
52#define	PCPU_MD_MIPS32_FIELDS						\
53	PCPU_MD_COMMON_FIELDS						\
54	char		__pad[125]
55#endif
56
57#ifdef	__mips_n64
58#define	PCPU_MD_FIELDS	PCPU_MD_MIPS64_FIELDS
59#else
60#define	PCPU_MD_FIELDS	PCPU_MD_MIPS32_FIELDS
61#endif
62
63#ifdef _KERNEL
64
65extern char pcpu_space[MAXCPU][PAGE_SIZE * 2];
66#define	PCPU_ADDR(cpu)		(struct pcpu *)(pcpu_space[(cpu)])
67
68extern struct pcpu *pcpup;
69#define	PCPUP	pcpup
70
71/*
72 * Since we use a wired TLB entry to map the same VA to a different
73 * physical page for each CPU, get_pcpu() must use the pc_self
74 * field to obtain a globally-unique pointer.
75 */
76#define	get_pcpu()		(PCPUP->pc_self)
77
78#define	PCPU_ADD(member, value)	(PCPUP->pc_ ## member += (value))
79#define	PCPU_GET(member)	(PCPUP->pc_ ## member)
80#define	PCPU_INC(member)	PCPU_ADD(member, 1)
81#define	PCPU_PTR(member)	(&PCPUP->pc_ ## member)
82#define	PCPU_SET(member,value)	(PCPUP->pc_ ## member = (value))
83#define PCPU_LAZY_INC(member)   (++PCPUP->pc_ ## member)
84
85#ifdef SMP
86/*
87 * Instantiate the wired TLB entry at PCPU_TLB_ENTRY to map 'pcpu' at 'pcpup'.
88 */
89void	mips_pcpu_tlb_init(struct pcpu *pcpu);
90#endif
91
92#endif	/* _KERNEL */
93
94#endif	/* !_MACHINE_PCPU_H_ */
95