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db_cpu.c revision 1.3.4.2 
      1  1.3.4.2  yamt /*	$NetBSD: db_cpu.c,v 1.3.4.2 2009/05/04 08:12:32 yamt Exp $	*/
      2  1.3.4.2  yamt 
      3  1.3.4.2  yamt /*-
      4  1.3.4.2  yamt  * Copyright (c) 2009 The NetBSD Foundation, Inc.
      5  1.3.4.2  yamt  * All rights reserved.
      6  1.3.4.2  yamt  *
      7  1.3.4.2  yamt  * This code is derived from software contributed to The NetBSD Foundation
      8  1.3.4.2  yamt  * by Andrew Doran.
      9  1.3.4.2  yamt  *
     10  1.3.4.2  yamt  * Redistribution and use in source and binary forms, with or without
     11  1.3.4.2  yamt  * modification, are permitted provided that the following conditions
     12  1.3.4.2  yamt  * are met:
     13  1.3.4.2  yamt  * 1. Redistributions of source code must retain the above copyright
     14  1.3.4.2  yamt  *    notice, this list of conditions and the following disclaimer.
     15  1.3.4.2  yamt  * 2. Redistributions in binary form must reproduce the above copyright
     16  1.3.4.2  yamt  *    notice, this list of conditions and the following disclaimer in the
     17  1.3.4.2  yamt  *    documentation and/or other materials provided with the distribution.
     18  1.3.4.2  yamt  *
     19  1.3.4.2  yamt  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
     20  1.3.4.2  yamt  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
     21  1.3.4.2  yamt  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
     22  1.3.4.2  yamt  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
     23  1.3.4.2  yamt  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
     24  1.3.4.2  yamt  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
     25  1.3.4.2  yamt  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
     26  1.3.4.2  yamt  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
     27  1.3.4.2  yamt  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
     28  1.3.4.2  yamt  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
     29  1.3.4.2  yamt  * POSSIBILITY OF SUCH DAMAGE.
     30  1.3.4.2  yamt  */
     31  1.3.4.2  yamt 
     32  1.3.4.2  yamt #include <sys/cdefs.h>
     33  1.3.4.2  yamt __KERNEL_RCSID(0, "$NetBSD: db_cpu.c,v 1.3.4.2 2009/05/04 08:12:32 yamt Exp $");
     34  1.3.4.2  yamt 
     35  1.3.4.2  yamt #ifndef _KERNEL
     36  1.3.4.2  yamt #include <stdbool.h>
     37  1.3.4.2  yamt #endif
     38  1.3.4.2  yamt 
     39  1.3.4.2  yamt #include <sys/param.h>
     40  1.3.4.2  yamt #include <sys/cpu.h>
     41  1.3.4.2  yamt #include <sys/proc.h>
     42  1.3.4.2  yamt 
     43  1.3.4.2  yamt #include <ddb/ddb.h>
     44  1.3.4.2  yamt 
     45  1.3.4.2  yamt static struct cpu_info	*head;
     46  1.3.4.2  yamt 
     47  1.3.4.2  yamt struct cpu_info *
     48  1.3.4.2  yamt db_cpu_first(void)
     49  1.3.4.2  yamt {
     50  1.3.4.2  yamt 
     51  1.3.4.2  yamt 	head = db_read_ptr("cpu_queue");
     52  1.3.4.2  yamt 	return head;
     53  1.3.4.2  yamt }
     54  1.3.4.2  yamt 
     55  1.3.4.2  yamt struct cpu_info *
     56  1.3.4.2  yamt db_cpu_next(struct cpu_info *ci)
     57  1.3.4.2  yamt {
     58  1.3.4.2  yamt 
     59  1.3.4.2  yamt 	db_read_bytes((db_addr_t)&ci->ci_data.cpu_qchain.cqe_next,
     60  1.3.4.2  yamt 	    sizeof(ci), (char *)&ci);
     61  1.3.4.2  yamt 	if (ci == head) {
     62  1.3.4.2  yamt 		ci = NULL;
     63  1.3.4.2  yamt 	}
     64  1.3.4.2  yamt 	return ci;
     65  1.3.4.2  yamt }
     66