1/* $NetBSD: db_cpu.c,v 1.6 2014/04/12 19:01:49 jakllsch 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 1.6 2014/04/12 19:01:49 jakllsch 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 45static int db_ncpu; 46static struct cpu_info **db_cpu_infos; 47 48static void 49db_cpu_init(void) 50{ 51 db_expr_t addr; 52 53 db_value_of_name("ncpu", &addr); 54 db_read_bytes((db_addr_t)addr, sizeof(db_ncpu), (char *)&db_ncpu); 55 56 db_value_of_name("cpu_infos", &addr); 57 db_read_bytes((db_addr_t)addr, sizeof(db_cpu_infos), 58 (char *)&db_cpu_infos); 59} 60 61static struct cpu_info * 62db_cpu_by_index(u_int idx) 63{ 64 struct cpu_info *ci; 65 66 db_read_bytes((db_addr_t)&db_cpu_infos[idx], sizeof(ci), (char *)&ci); 67 return ci; 68} 69 70struct cpu_info * 71db_cpu_first(void) 72{ 73 74 db_cpu_init(); 75 return db_cpu_by_index(0); 76} 77 78struct cpu_info * 79db_cpu_next(struct cpu_info *ci) 80{ 81 u_int idx; 82 83 db_read_bytes((db_addr_t)&ci->ci_index, sizeof(idx), (char *)&idx); 84 if ((idx + 1) >= (u_int)db_ncpu) 85 return NULL; 86 return db_cpu_by_index(idx + 1); 87} 88