1/*-
2 * Copyright (c) 1999 Luoqi Chen <luoqi@freebsd.org>
3 * Copyright (c) 2015-2016 Ruslan Bukin <br@bsdpad.com>
4 * All rights reserved.
5 *
6 * Portions of this software were developed by SRI International and the
7 * University of Cambridge Computer Laboratory under DARPA/AFRL contract
8 * FA8750-10-C-0237 ("CTSRD"), as part of the DARPA CRASH research programme.
9 *
10 * Portions of this software were developed by the University of Cambridge
11 * Computer Laboratory as part of the CTSRD Project, with support from the
12 * UK Higher Education Innovation Fund (HEIF).
13 *
14 * Redistribution and use in source and binary forms, with or without
15 * modification, are permitted provided that the following conditions
16 * are met:
17 * 1. Redistributions of source code must retain the above copyright
18 *    notice, this list of conditions and the following disclaimer.
19 * 2. Redistributions in binary form must reproduce the above copyright
20 *    notice, this list of conditions and the following disclaimer in the
21 *    documentation and/or other materials provided with the distribution.
22 *
23 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
24 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
25 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
26 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
27 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
28 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
29 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
30 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
31 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
32 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
33 * SUCH DAMAGE.
34 *
35 *	from: FreeBSD: src/sys/i386/include/globaldata.h,v 1.27 2001/04/27
36 * $FreeBSD$
37 */
38
39#ifndef	_MACHINE_PCPU_H_
40#define	_MACHINE_PCPU_H_
41
42#include <machine/cpu.h>
43#include <machine/cpufunc.h>
44
45#define	ALT_STACK_SIZE	128
46
47#define	PCPU_MD_FIELDS							\
48	uint32_t pc_pending_ipis;	/* IPIs pending to this CPU */	\
49	uint64_t pc_reg;		/* CPU MMIO base (PA) */	\
50	char __pad[117]
51
52#ifdef _KERNEL
53
54struct pcb;
55struct pcpu;
56extern struct pcpu *pcpup;
57
58static inline struct pcpu *
59get_pcpu(void)
60{
61	struct pcpu *pcpu;
62
63	__asm __volatile("mv %0, gp" : "=&r"(pcpu));
64
65	return (pcpu);
66}
67
68static inline struct thread *
69get_curthread(void)
70{
71	struct thread *td;
72
73	__asm __volatile("ld %0, 0(gp)" : "=&r"(td));
74
75	return (td);
76}
77
78#define	curthread get_curthread()
79
80#define	PCPU_GET(member)	(get_pcpu()->pc_ ## member)
81#define	PCPU_ADD(member, value)	(get_pcpu()->pc_ ## member += (value))
82#define	PCPU_INC(member)	PCPU_ADD(member, 1)
83#define	PCPU_PTR(member)	(&get_pcpu()->pc_ ## member)
84#define	PCPU_SET(member,value)	(get_pcpu()->pc_ ## member = (value))
85
86#endif	/* _KERNEL */
87
88#endif	/* !_MACHINE_PCPU_H_ */
89