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 | |