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/*-
* Copyright (c) 2001 Wind River Systems, Inc.
* All rights reserved.
* Written by: John Baldwin <jhb@FreeBSD.org>
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 4. Neither the name of the author nor the names of any co-contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* $FreeBSD$
*/
#ifndef _SYS_PCPU_H_
#define _SYS_PCPU_H_
#ifndef _KERNEL
#error "no user-serviceable parts inside"
#endif
#ifdef LOCORE
#error "no assembler-serviceable parts inside"
#endif
#include <sys/queue.h>
#include <sys/vmmeter.h>
#include <sys/resource.h>
#include <machine/pcpu.h>
struct pcb;
struct thread;
/*
* XXXUPS remove as soon as we have per cpu variable
* linker sets and can define rm_queue in _rm_lock.h
*/
struct rm_queue {
struct rm_queue* volatile rmq_next;
struct rm_queue* volatile rmq_prev;
};
/*
* This structure maps out the global data that needs to be kept on a
* per-cpu basis. The members are accessed via the PCPU_GET/SET/PTR
* macros defined in <machine/pcpu.h>. Machine dependent fields are
* defined in the PCPU_MD_FIELDS macro defined in <machine/pcpu.h>.
*/
struct pcpu {
struct thread *pc_curthread; /* Current thread */
struct thread *pc_idlethread; /* Idle thread */
struct thread *pc_fpcurthread; /* Fp state owner */
struct thread *pc_deadthread; /* Zombie thread or NULL */
struct pcb *pc_curpcb; /* Current pcb */
uint64_t pc_switchtime;
int pc_switchticks;
u_int pc_cpuid; /* This cpu number */
cpumask_t pc_cpumask; /* This cpu mask */
cpumask_t pc_other_cpus; /* Mask of all other cpus */
SLIST_ENTRY(pcpu) pc_allcpu;
struct lock_list_entry *pc_spinlocks;
#ifdef KTR_PERCPU
int pc_ktr_idx; /* Index into trace table */
char *pc_ktr_buf;
#endif
struct vmmeter pc_cnt; /* VM stats counters */
long pc_cp_time[CPUSTATES]; /* statclock ticks */
struct device *pc_device;
/*
* Stuff for read mostly lock
*
* XXXUPS remove as soon as we have per cpu variable
* linker sets.
*/
struct rm_queue pc_rm_queue;
/*
* Keep MD fields last, so that CPU-specific variations on a
* single architecture don't result in offset variations of
* the machine-independent fields of the pcpu. Even though
* the pcpu structure is private to the kernel, some ports
* (e.g. lsof, part of gtop) define _KERNEL and include this
* header. While strictly speaking this is wrong, there's no
* reason not to keep the offsets of the MI fields contants.
* If only to make kernel debugging easier...
*/
PCPU_MD_FIELDS;
};
SLIST_HEAD(cpuhead, pcpu);
extern struct cpuhead cpuhead;
#define curcpu PCPU_GET(cpuid)
#define curproc (curthread->td_proc)
#ifndef curthread
#define curthread PCPU_GET(curthread)
#endif
/*
* Machine dependent callouts. cpu_pcpu_init() is responsible for
* initializing machine dependent fields of struct pcpu, and
* db_show_mdpcpu() is responsible for handling machine dependent
* fields for the DDB 'show pcpu' command.
*/
extern struct pcpu *cpuid_to_pcpu[MAXCPU];
void cpu_pcpu_init(struct pcpu *pcpu, int cpuid, size_t size);
void db_show_mdpcpu(struct pcpu *pcpu);
void pcpu_destroy(struct pcpu *pcpu);
struct pcpu *pcpu_find(u_int cpuid);
void pcpu_init(struct pcpu *pcpu, int cpuid, size_t size);
#endif /* !_SYS_PCPU_H_ */
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