| 1 | /* $NetBSD: db_cpu.c,v 1.7 2014/04/12 19:25:48 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 1.7 2014/04/12 19:25:48 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 | |
| 45 | static int db_ncpu; |
| 46 | static struct cpu_info **db_cpu_infos; |
| 47 | |
| 48 | static void |
| 49 | db_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 | |
| 61 | static struct cpu_info * |
| 62 | db_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 | |
| 70 | struct cpu_info * |
| 71 | db_cpu_first(void) |
| 72 | { |
| 73 | |
| 74 | db_cpu_init(); |
| 75 | return db_cpu_by_index(0); |
| 76 | } |
| 77 | |
| 78 | struct cpu_info * |
| 79 | db_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 | |