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 * $FreeBSD$
30 */
31
32#ifndef	_MACHINE_PCPU_H_
33#define	_MACHINE_PCPU_H_
34
35#include <machine/asmacros.h>
36#include <machine/cache.h>
37#include <machine/frame.h>
38#include <machine/intr_machdep.h>
39
40#define	ALT_STACK_SIZE	128
41
42struct pmap;
43
44/*
45 * Inside the kernel, the globally reserved register g7 is used to
46 * point at the globaldata structure.
47 */
48#define	PCPU_MD_FIELDS							\
49	struct	cacheinfo pc_cache;					\
50	struct	intr_request pc_irpool[IR_FREE];			\
51	struct	intr_request *pc_irhead;				\
52	struct	intr_request **pc_irtail;				\
53	struct	intr_request *pc_irfree;				\
54	struct	pmap *pc_pmap;						\
55	vm_offset_t pc_addr;						\
56	vm_offset_t pc_qmap_addr;					\
57	u_long	pc_tickref;						\
58	u_long	pc_tickadj;						\
59	u_long	pc_tickincrement;					\
60	u_int	pc_clock;						\
61	u_int	pc_impl;						\
62	u_int	pc_mid;							\
63	u_int	pc_node;						\
64	u_int	pc_tlb_ctx;						\
65	u_int	pc_tlb_ctx_max;						\
66	u_int	pc_tlb_ctx_min;						\
67	char	__pad[653]
68
69#ifdef _KERNEL
70
71extern void *dpcpu0;
72
73struct pcb;
74struct pcpu;
75
76register struct pcb *curpcb __asm__(__XSTRING(PCB_REG));
77register struct pcpu *pcpup __asm__(__XSTRING(PCPU_REG));
78
79#define	get_pcpu()		(pcpup)
80#define	PCPU_GET(member)	(pcpup->pc_ ## member)
81
82static __inline __pure2 struct thread *
83__curthread(void)
84{
85	struct thread *td;
86
87	__asm("ldx [%" __XSTRING(PCPU_REG) "], %0" : "=r" (td));
88	return (td);
89}
90#define	curthread	(__curthread())
91
92/*
93 * XXX The implementation of this operation should be made atomic
94 * with respect to preemption.
95 */
96#define	PCPU_ADD(member, value)	(pcpup->pc_ ## member += (value))
97#define	PCPU_INC(member)	PCPU_ADD(member, 1)
98#define	PCPU_PTR(member)	(&pcpup->pc_ ## member)
99#define	PCPU_SET(member,value)	(pcpup->pc_ ## member = (value))
100
101#endif	/* _KERNEL */
102
103#endif	/* !_MACHINE_PCPU_H_ */
104