2 * Copyright (c) 2001 Wind River Systems, Inc.
4 * Written by: John Baldwin <jhb@FreeBSD.org>
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions
9 * 1. Redistributions of source code must retain the above copyright
10 * 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 * 4. Neither the name of the author nor the names of any co-contributors
15 * may be used to endorse or promote products derived from this software
16 * without specific prior written permission.
18 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
19 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
20 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
21 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
22 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
23 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
24 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
25 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
26 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
27 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
37 #error "no user-serviceable parts inside"
41 #error "no assembler-serviceable parts inside"
44 #include <sys/queue.h>
45 #include <sys/vmmeter.h>
46 #include <machine/pcpu.h>
52 * This structure maps out the global data that needs to be kept on a
53 * per-cpu basis. The members are accessed via the PCPU_GET/SET/PTR
54 * macros defined in <machine/pcpu.h>. Machine dependent fields are
55 * defined in the PCPU_MD_FIELDS macro defined in <machine/pcpu.h>.
58 struct thread *pc_curthread; /* Current thread */
59 struct thread *pc_idlethread; /* Idle thread */
60 struct thread *pc_fpcurthread; /* Fp state owner */
61 struct thread *pc_deadthread; /* Zombie thread or NULL */
62 struct pcb *pc_curpcb; /* Current pcb */
63 struct bintime pc_switchtime;
65 u_int pc_cpuid; /* This cpu number */
66 u_int pc_cpumask; /* This cpu mask */
67 u_int pc_other_cpus; /* Mask of all other cpus */
68 SLIST_ENTRY(pcpu) pc_allcpu;
69 struct lock_list_entry *pc_spinlocks;
71 int pc_ktr_idx; /* Index into trace table */
75 struct vmmeter pc_cnt; /* VM stats counters */
78 SLIST_HEAD(cpuhead, pcpu);
80 extern struct cpuhead cpuhead;
82 #define CURPROC (curthread->td_proc)
83 #define curkse (curthread->td_kse)
84 #define curksegrp (curthread->td_ksegrp)
85 #define curproc (curthread->td_proc)
86 #define curthread PCPU_GET(curthread)
89 * MI PCPU support functions
91 * PCPU_LAZY_INC() - Lazily increment a per-cpu stats counter, without
92 * guarenteeing atomicity or even necessarily consistency.
94 * XXX we need to create MD primitives to support
95 * this to guarentee at least some level of consistency,
96 * i.e., to prevent us from totally corrupting the
97 * counters due to preemption in a multi-instruction
98 * increment sequence for architectures that do not
99 * support single-instruction memory increments.
101 #define PCPU_LAZY_INC(var) (++*PCPU_PTR(var))
104 * Machine dependent callouts. cpu_pcpu_init() is responsible for
105 * initializing machine dependent fields of struct pcpu, and
106 * db_show_mdpcpu() is responsible for handling machine dependent
107 * fields for the DDB 'show pcpu' command.
109 void cpu_pcpu_init(struct pcpu *pcpu, int cpuid, size_t size);
110 void db_show_mdpcpu(struct pcpu *pcpu);
112 void pcpu_destroy(struct pcpu *pcpu);
113 struct pcpu *pcpu_find(u_int cpuid);
114 void pcpu_init(struct pcpu *pcpu, int cpuid, size_t size);
116 #endif /* !_SYS_PCPU_H_ */