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 */
37
38 #ifndef _MACHINE_PCPU_H_
39 #define _MACHINE_PCPU_H_
40
41 #include <machine/cpu.h>
42 #include <machine/cpufunc.h>
43
44 /* Keep in sync with db_show_mdpcpu() */
45 #define PCPU_MD_FIELDS \
46 struct pmap *pc_curpmap; /* Currently active pmap */ \
47 uint32_t pc_pending_ipis; /* IPIs pending to this CPU */ \
48 uint32_t pc_hart; /* Hart ID */ \
49 char __pad[56] /* Pad to factor of PAGE_SIZE */
50
51 #ifdef _KERNEL
52
53 struct pcb;
54 struct pcpu;
55
56 static inline struct pcpu *
get_pcpu(void)57 get_pcpu(void)
58 {
59 struct pcpu *pcpu;
60
61 __asm __volatile("mv %0, tp" : "=&r"(pcpu));
62
63 return (pcpu);
64 }
65
66 static inline struct thread *
get_curthread(void)67 get_curthread(void)
68 {
69 struct thread *td;
70
71 __asm __volatile("ld %0, 0(tp)" : "=&r"(td));
72
73 return (td);
74 }
75
76 #define curthread get_curthread()
77
78 #define PCPU_GET(member) (get_pcpu()->pc_ ## member)
79 #define PCPU_ADD(member, value) (get_pcpu()->pc_ ## member += (value))
80 #define PCPU_PTR(member) (&get_pcpu()->pc_ ## member)
81 #define PCPU_SET(member,value) (get_pcpu()->pc_ ## member = (value))
82
83 #endif /* _KERNEL */
84
85 #endif /* !_MACHINE_PCPU_H_ */
86