165557Sjasone/*- 2132637Simp * Copyright (C) 2000-2004 The FreeBSD Project. All rights reserved. 365557Sjasone * 4132637Simp * Redistribution and use in source and binary forms, with or without 5132637Simp * modification, are permitted provided that the following conditions 6132637Simp * are met: 7132637Simp * 1. Redistributions of source code must retain the above copyright 8132637Simp * notice, this list of conditions and the following disclaimer. 9132637Simp * 2. Redistributions in binary form must reproduce the above copyright 10132637Simp * notice, this list of conditions and the following disclaimer in the 11132637Simp * documentation and/or other materials provided with the distribution. 12132637Simp * 13132637Simp * THIS SOFTWARE IS PROVIDED BY AUTHOR AND CONTRIBUTORS ``AS IS'' AND 14132637Simp * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 15132637Simp * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 16132637Simp * ARE DISCLAIMED. IN NO EVENT SHALL AUTHOR OR CONTRIBUTORS BE LIABLE 17132637Simp * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 18132637Simp * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 19132637Simp * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 20132637Simp * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 21132637Simp * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 22132637Simp * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 23132637Simp * SUCH DAMAGE. 2465557Sjasone */ 2565557Sjasone 26116182Sobrien#include <sys/cdefs.h> 27116182Sobrien__FBSDID("$FreeBSD$"); 28116182Sobrien 2965557Sjasone#include <sys/param.h> 3065557Sjasone#include <sys/systm.h> 3165557Sjasone#include <sys/kernel.h> 3276440Sjhb#include <sys/kthread.h> 3376166Smarkm#include <sys/lock.h> 3476166Smarkm#include <sys/mutex.h> 3576166Smarkm#include <sys/proc.h> 3676440Sjhb#include <sys/resourcevar.h> 37104964Sjeff#include <sys/sched.h> 3865557Sjasone#include <sys/unistd.h> 39134591Sjulian#ifdef SMP 40134591Sjulian#include <sys/smp.h> 41134591Sjulian#endif 4265557Sjasone 4365557Sjasonestatic void idle_setup(void *dummy); 44177253SrwatsonSYSINIT(idle_setup, SI_SUB_SCHED_IDLE, SI_ORDER_FIRST, idle_setup, NULL); 4565557Sjasone 4665557Sjasone/* 47121238Speter * Set up per-cpu idle process contexts. The AP's shouldn't be running or 4872222Sjhb * accessing their idle processes at this point, so don't bother with 4972222Sjhb * locking. 5065557Sjasone */ 5165557Sjasonestatic void 5265557Sjasoneidle_setup(void *dummy) 5365557Sjasone{ 5476078Sjhb#ifdef SMP 5587702Sjhb struct pcpu *pc; 5676078Sjhb#endif 5776078Sjhb struct proc *p; 5899072Sjulian struct thread *td; 5965557Sjasone int error; 6065557Sjasone 61173050Sjulian p = NULL; /* start with no idle process */ 6276078Sjhb#ifdef SMP 63222531Snwhitehorn STAILQ_FOREACH(pc, &cpuhead, pc_allcpu) { 64173004Sjulian#endif 65173035Sjulian#ifdef SMP 66173004Sjulian error = kproc_kthread_add(sched_idletd, NULL, &p, &td, 67173051Sjulian RFSTOPPED | RFHIGHPID, 0, "idle", "idle: cpu%d", pc->pc_cpuid); 68173004Sjulian pc->pc_idlethread = td; 6965557Sjasone#else 70173035Sjulian error = kproc_kthread_add(sched_idletd, NULL, &p, &td, 71173051Sjulian RFSTOPPED | RFHIGHPID, 0, "idle", "idle"); 72173004Sjulian PCPU_SET(idlethread, td); 7365557Sjasone#endif 7465557Sjasone if (error) 75172836Sjulian panic("idle_setup: kproc_create error %d\n", error); 7665557Sjasone 77170307Sjeff thread_lock(td); 78131473Sjhb TD_SET_CAN_RUN(td); 79198854Sattilio td->td_flags |= TDF_IDLETD | TDF_NOLOAD; 80163709Sjb sched_class(td, PRI_IDLE); 81141246Sssouhlal sched_prio(td, PRI_MAX_IDLE); 82170307Sjeff thread_unlock(td); 8376078Sjhb#ifdef SMP 8465557Sjasone } 8576078Sjhb#endif 8665557Sjasone} 87