1 /*-
2 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
3 *
4 * Copyright (c) 1999 Luoqi Chen <luoqi@freebsd.org>
5 * All rights reserved.
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
9 * are met:
10 * 1. Redistributions of source code must retain the above copyright
11 * notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 * notice, this list of conditions and the following disclaimer in the
14 * documentation and/or other materials provided with the distribution.
15 *
16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
17 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
19 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
20 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
21 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
22 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
23 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
24 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
25 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
26 * SUCH DAMAGE.
27 *
28 * from: FreeBSD: src/sys/i386/include/globaldata.h,v 1.27 2001/04/27
29 * $FreeBSD: stable/12/sys/sparc64/include/pcpu.h 326262 2017-11-27 15:10:39Z pfg $
30 */
31
32 #ifndef _MACHINE_PCPU_H_
33 #define _MACHINE_PCPU_H_
34
35 #include <machine/asmacros.h>
36 #include <machine/cache.h>
37 #include <machine/frame.h>
38 #include <machine/intr_machdep.h>
39
40 #define ALT_STACK_SIZE 128
41
42 struct pmap;
43
44 /*
45 * Inside the kernel, the globally reserved register g7 is used to
46 * point at the globaldata structure.
47 */
48 #define PCPU_MD_FIELDS \
49 struct cacheinfo pc_cache; \
50 struct intr_request pc_irpool[IR_FREE]; \
51 struct intr_request *pc_irhead; \
52 struct intr_request **pc_irtail; \
53 struct intr_request *pc_irfree; \
54 struct pmap *pc_pmap; \
55 vm_offset_t pc_addr; \
56 vm_offset_t pc_qmap_addr; \
57 u_long pc_tickref; \
58 u_long pc_tickadj; \
59 u_long pc_tickincrement; \
60 u_int pc_clock; \
61 u_int pc_impl; \
62 u_int pc_mid; \
63 u_int pc_node; \
64 u_int pc_tlb_ctx; \
65 u_int pc_tlb_ctx_max; \
66 u_int pc_tlb_ctx_min; \
67 char __pad[653]
68
69 #ifdef _KERNEL
70
71 extern void *dpcpu0;
72
73 struct pcb;
74 struct pcpu;
75
76 register struct pcb *curpcb __asm__(__XSTRING(PCB_REG));
77 register struct pcpu *pcpup __asm__(__XSTRING(PCPU_REG));
78
79 #define get_pcpu() (pcpup)
80 #define PCPU_GET(member) (pcpup->pc_ ## member)
81
82 static __inline __pure2 struct thread *
__curthread(void)83 __curthread(void)
84 {
85 struct thread *td;
86
87 __asm("ldx [%" __XSTRING(PCPU_REG) "], %0" : "=r" (td));
88 return (td);
89 }
90 #define curthread (__curthread())
91
92 /*
93 * XXX The implementation of this operation should be made atomic
94 * with respect to preemption.
95 */
96 #define PCPU_ADD(member, value) (pcpup->pc_ ## member += (value))
97 #define PCPU_INC(member) PCPU_ADD(member, 1)
98 #define PCPU_PTR(member) (&pcpup->pc_ ## member)
99 #define PCPU_SET(member,value) (pcpup->pc_ ## member = (value))
100
101 #endif /* _KERNEL */
102
103 #endif /* !_MACHINE_PCPU_H_ */
104