pcpu.h revision 268200 
1156956Sume/*-
2156956Sume * Copyright (c) 1999 Luoqi Chen <luoqi@freebsd.org>
3156956Sume * Copyright (c) Peter Wemm <peter@netplex.com.au>
4156956Sume * All rights reserved.
5156956Sume *
6156956Sume * Redistribution and use in source and binary forms, with or without
7158787Sume * modification, are permitted provided that the following conditions
8158787Sume * are met:
9157049Sdes * 1. Redistributions of source code must retain the above copyright
10157049Sdes *    notice, this list of conditions and the following disclaimer.
11 * 2. Redistributions in binary form must reproduce the above copyright
12 *    notice, this list of conditions and the following disclaimer in the
13 *    documentation and/or other materials provided with the distribution.
14 *
15 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
16 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
17 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
18 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
19 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
20 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
21 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
22 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
23 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
24 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
25 * SUCH DAMAGE.
26 *
27 * $FreeBSD: stable/10/sys/ia64/include/pcpu.h 268200 2014-07-02 23:47:43Z marcel $
28 */
29
30#ifndef	_MACHINE_PCPU_H_
31#define	_MACHINE_PCPU_H_
32
33#include <sys/sysctl.h>
34#include <machine/pcb.h>
35
36struct pcpu_stats {
37	u_long		pcs_nasts;		/* IPI_AST counter. */
38	u_long		pcs_nclks;		/* Clock interrupt counter. */
39	u_long		pcs_nextints;		/* ExtINT counter. */
40	u_long		pcs_nhardclocks;	/* IPI_HARDCLOCK counter. */
41	u_long		pcs_nhighfps;		/* IPI_HIGH_FP counter. */
42	u_long		pcs_nhwints;		/* Hardware int. counter. */
43	u_long		pcs_npreempts;		/* IPI_PREEMPT counter. */
44	u_long		pcs_nrdvs;		/* IPI_RENDEZVOUS counter. */
45	u_long		pcs_nstops;		/* IPI_STOP counter. */
46	u_long		pcs_nstrays;		/* Stray interrupt counter. */
47};
48
49struct pcpu_md {
50	struct pcb	pcb;			/* Used by IPI_STOP */
51	struct pmap	*current_pmap;		/* active pmap */
52	vm_offset_t	vhpt;			/* Address of VHPT */
53	uint64_t	lid;			/* local CPU ID */
54	uint64_t	clock;			/* Clock counter. */
55	uint64_t	clock_load;		/* Clock reload value. */
56	uint32_t	clock_mode;		/* Clock ET mode */
57	uint32_t	awake:1;		/* CPU is awake? */
58	struct pcpu_stats stats;		/* Interrupt stats. */
59	void		*xtrace_buffer;
60	uint64_t	xtrace_tail;
61#ifdef _KERNEL
62	struct sysctl_ctx_list sysctl_ctx;
63	struct sysctl_oid *sysctl_tree;
64#endif
65};
66
67#define	PCPU_MD_FIELDS							\
68	uint32_t	pc_acpi_id;		/* ACPI CPU id. */	\
69	struct pcpu_md	pc_md;			/* MD fields. */	\
70	char		__pad[10*128]
71
72#ifdef _KERNEL
73
74struct pcpu;
75
76register struct pcpu * volatile pcpup __asm__("r13");
77
78static __inline __pure2 struct thread *
79__curthread(void)
80{
81	struct thread *td;
82
83	__asm("ld8.acq %0=[r13]" : "=r"(td));
84	return (td);
85}
86#define	curthread	(__curthread())
87
88#define	PCPU_GET(member)	(pcpup->pc_ ## member)
89
90/*
91 * XXX The implementation of this operation should be made atomic
92 * with respect to preemption.
93 */
94#define	PCPU_ADD(member, value)	(pcpup->pc_ ## member += (value))
95#define	PCPU_INC(member)	PCPU_ADD(member, 1)
96#define	PCPU_PTR(member)	(&pcpup->pc_ ## member)
97#define	PCPU_SET(member,value)	(pcpup->pc_ ## member = (value))
98
99#endif	/* _KERNEL */
100
101#endif	/* !_MACHINE_PCPU_H_ */
102