/* $NetBSD: cpu.h,v 1.23.4.3 2009/02/02 03:19:32 snj Exp $ */ /*- * Copyright (c) 2007 YAMAMOTO Takashi, * All rights reserved. * * 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. * * 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. */ #ifndef _SYS_CPU_H_ #define _SYS_CPU_H_ #ifndef _LOCORE #include <machine/cpu.h> #include <sys/lwp.h> struct cpu_info; #ifndef cpu_idle void cpu_idle(void); #endif /* * cpu_need_resched() must always be called with the target CPU * locked (via spc_lock() or another route), unless called locally. * If called locally, the caller need only be at IPL_SCHED. */ #ifndef cpu_need_resched void cpu_need_resched(struct cpu_info *, int); #endif #ifndef cpu_did_resched #define cpu_did_resched(l) /* nothing */ #endif #ifndef CPU_INFO_ITERATOR #define CPU_INFO_ITERATOR int #define CPU_INFO_FOREACH(cii, ci) \ (void)cii, ci = curcpu(); ci != NULL; ci = NULL #endif #ifndef CPU_IS_PRIMARY #define CPU_IS_PRIMARY(ci) ((void)ci, 1) #endif #ifdef __HAVE_MD_CPU_OFFLINE void cpu_offline_md(void); #endif lwp_t *cpu_switchto(lwp_t *, lwp_t *, bool); struct cpu_info *cpu_lookup(u_int); int cpu_setstate(struct cpu_info *, bool); bool cpu_intr_p(void); bool cpu_kpreempt_enter(uintptr_t, int); void cpu_kpreempt_exit(uintptr_t); bool cpu_kpreempt_disabled(void); CIRCLEQ_HEAD(cpuqueue, cpu_info); extern kmutex_t cpu_lock; extern u_int maxcpus; extern struct cpuqueue cpu_queue; static inline u_int cpu_index(struct cpu_info *ci) { return ci->ci_index; } #endif /* !_LOCORE */ /* flags for cpu_need_resched */ #define RESCHED_LAZY 0x01 #define RESCHED_IMMED 0x02 #define RESCHED_KPREEMPT 0x04 #endif /* !_SYS_CPU_H_ */