1/*-
2 * Copyright (c) 1999 Luoqi Chen <luoqi@freebsd.org>
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 *    notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 *    notice, this list of conditions and the following disclaimer in the
12 *    documentation and/or other materials provided with the distribution.
13 *
14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
17 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
24 * SUCH DAMAGE.
25 *
26 *	from: FreeBSD: src/sys/i386/include/globaldata.h,v 1.27 2001/04/27
27 * $FreeBSD: releng/10.3/sys/sparc64/include/pcpu.h 249265 2013-04-08 19:19:10Z glebius $
28 */
29
30#ifndef	_MACHINE_PCPU_H_
31#define	_MACHINE_PCPU_H_
32
33#include <machine/asmacros.h>
34#include <machine/cache.h>
35#include <machine/frame.h>
36#include <machine/intr_machdep.h>
37
38#define	ALT_STACK_SIZE	128
39
40struct pmap;
41
42/*
43 * Inside the kernel, the globally reserved register g7 is used to
44 * point at the globaldata structure.
45 */
46#define	PCPU_MD_FIELDS							\
47	struct	cacheinfo pc_cache;					\
48	struct	intr_request pc_irpool[IR_FREE];			\
49	struct	intr_request *pc_irhead;				\
50	struct	intr_request **pc_irtail;				\
51	struct	intr_request *pc_irfree;				\
52	struct	pmap *pc_pmap;						\
53	vm_offset_t pc_addr;						\
54	u_long	pc_tickref;						\
55	u_long	pc_tickadj;						\
56	u_long	pc_tickincrement;					\
57	u_int	pc_clock;						\
58	u_int	pc_impl;						\
59	u_int	pc_mid;							\
60	u_int	pc_node;						\
61	u_int	pc_tlb_ctx;						\
62	u_int	pc_tlb_ctx_max;						\
63	u_int	pc_tlb_ctx_min;						\
64	char	__pad[405]
65
66#ifdef _KERNEL
67
68extern void *dpcpu0;
69
70struct pcb;
71struct pcpu;
72
73register struct pcb *curpcb __asm__(__XSTRING(PCB_REG));
74register struct pcpu *pcpup __asm__(__XSTRING(PCPU_REG));
75
76#define	PCPU_GET(member)	(pcpup->pc_ ## member)
77
78static __inline __pure2 struct thread *
79__curthread(void)
80{
81	struct thread *td;
82
83	__asm("ldx [%" __XSTRING(PCPU_REG) "], %0" : "=r" (td));
84	return (td);
85}
86#define	curthread	(__curthread())
87
88/*
89 * XXX The implementation of this operation should be made atomic
90 * with respect to preemption.
91 */
92#define	PCPU_ADD(member, value)	(pcpup->pc_ ## member += (value))
93#define	PCPU_INC(member)	PCPU_ADD(member, 1)
94#define	PCPU_PTR(member)	(&pcpup->pc_ ## member)
95#define	PCPU_SET(member,value)	(pcpup->pc_ ## member = (value))
96
97#endif	/* _KERNEL */
98
99#endif	/* !_MACHINE_PCPU_H_ */
100