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: releng/11.2/sys/riscv/include/pcpu.h 298580 2016-04-25 14:47:51Z br $
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
54 struct pcb;
55 struct pcpu;
56 extern struct pcpu *pcpup;
57
58 static inline struct pcpu *
59 get_pcpu(void)
60 {
61 struct pcpu *pcpu;
62
63 __asm __volatile("mv %0, gp" : "=&r"(pcpu));
64
65 return (pcpu);
66 }
67
68 static inline struct thread *
69 get_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_ */
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