1 /* $NetBSD: db_cpu.c,v 1.4 2011/02/20 10:24:45 hannken Exp $ */ 2 3 /*- 4 * Copyright (c) 2009 The NetBSD Foundation, Inc. 5 * All rights reserved. 6 * 7 * This code is derived from software contributed to The NetBSD Foundation 8 * by Andrew Doran. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 19 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 20 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 21 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 22 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 23 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 24 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 25 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 26 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 27 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 28 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 29 * POSSIBILITY OF SUCH DAMAGE. 30 */ 31 32 #include <sys/cdefs.h> 33 __KERNEL_RCSID(0, "$NetBSD: db_cpu.c,v 1.4 2011/02/20 10:24:45 hannken Exp $"); 34 35 #ifndef _KERNEL 36 #include <stdbool.h> 37 #endif 38 39 #include <sys/param.h> 40 #include <sys/cpu.h> 41 #include <sys/proc.h> 42 43 #include <ddb/ddb.h> 44 45 static struct cpu_info *head; 46 static void *head_addr; 47 48 struct cpu_info * 49 db_cpu_first(void) 50 { 51 52 head = db_read_ptr("cpu_queue"); 53 (void) db_value_of_name("cpu_queue", (db_expr_t *)&head_addr); 54 return head; 55 } 56 57 struct cpu_info * 58 db_cpu_next(struct cpu_info *ci) 59 { 60 61 db_read_bytes((db_addr_t)&ci->ci_data.cpu_qchain.cqe_next, 62 sizeof(ci), (char *)&ci); 63 if (ci == head_addr) { 64 ci = NULL; 65 } 66 return ci; 67 } 68