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kern_cpu.c revision 1.2 
      1 /*	$NetBSD: kern_cpu.c,v 1.2 2007/05/17 14:51:38 yamt Exp $	*/
      2 
      3 /*-
      4  * Copyright (c)2007 YAMAMOTO Takashi,
      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 
     29 #include <sys/cdefs.h>
     30 
     31 __KERNEL_RCSID(0, "$NetBSD: kern_cpu.c,v 1.2 2007/05/17 14:51:38 yamt Exp $");
     32 
     33 #include <sys/param.h>
     34 #include <sys/systm.h>
     35 #include <sys/idle.h>
     36 #include <sys/sched.h>
     37 
     38 #include <machine/cpu.h>
     39 
     40 int
     41 mi_cpu_attach(struct cpu_info *ci)
     42 {
     43 	struct schedstate_percpu *spc = &ci->ci_schedstate;
     44 	int error;
     45 
     46 	mutex_init(&spc->spc_lwplock, MUTEX_SPIN, IPL_SCHED);
     47 	sched_cpuattach(ci);
     48 
     49 	error = create_idle_lwp(ci);
     50 	if (error != 0) {
     51 		/* XXX revert sched_cpuattach */
     52 		return error;
     53 	}
     54 
     55 	ncpu++;
     56 
     57 	return 0;
     58 }
     59