1 | /* $NetBSD: cpufreq.h,v 1.5 2011/10/27 05:13:04 jruoho Exp $ */ |
2 | |
3 | /*- |
4 | * Copyright (c) 2011 The NetBSD Foundation, Inc. |
5 | * All rights reserved. |
6 | * |
7 | * This code is derived from software contributed to The NetBSD Foundation |
8 | * by Jukka Ruohonen. |
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 | * |
14 | * 1. Redistributions of source code must retain the above copyright |
15 | * notice, this list of conditions and the following disclaimer. |
16 | * 2. Redistributions in binary form must reproduce the above copyright |
17 | * notice, this list of conditions and the following disclaimer in the |
18 | * documentation and/or other materials provided with the distribution. |
19 | * |
20 | * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS |
21 | * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED |
22 | * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR |
23 | * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS |
24 | * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR |
25 | * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF |
26 | * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS |
27 | * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN |
28 | * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) |
29 | * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE |
30 | * POSSIBILITY OF SUCH DAMAGE. |
31 | */ |
32 | #ifndef _SYS_CPUFREQ_H_ |
33 | #define _SYS_CPUFREQ_H_ |
34 | |
35 | #ifndef _KERNEL |
36 | #include <stdbool.h> |
37 | #endif |
38 | |
39 | #ifdef _KERNEL |
40 | #ifndef _SYS_XCALL_H_ |
41 | #include <sys/xcall.h> |
42 | #endif |
43 | #endif |
44 | |
45 | #define CPUFREQ_NAME_MAX 16 |
46 | #define CPUFREQ_STATE_MAX 32 |
47 | #define CPUFREQ_LATENCY_MAX UINT32_MAX |
48 | |
49 | #define CPUFREQ_STATE_ENABLED UINT32_MAX |
50 | #define CPUFREQ_STATE_DISABLED UINT32_MAX - 1 |
51 | |
52 | struct cpufreq_state { |
53 | uint32_t cfs_freq; /* MHz */ |
54 | uint32_t cfs_power; /* mW */ |
55 | uint32_t cfs_latency; /* usec */ |
56 | uint32_t cfs_index; |
57 | uint32_t cfs_reserved[5]; |
58 | }; |
59 | |
60 | struct cpufreq { |
61 | char cf_name[CPUFREQ_NAME_MAX]; |
62 | uint32_t cf_state_count; |
63 | uint32_t cf_state_target; |
64 | uint32_t cf_state_current; |
65 | uint32_t cf_reserved[5]; |
66 | u_int cf_index; |
67 | |
68 | #ifdef _KERNEL |
69 | bool cf_mp; |
70 | bool cf_init; |
71 | void *cf_cookie; |
72 | xcfunc_t cf_get_freq; |
73 | xcfunc_t cf_set_freq; |
74 | uint32_t cf_state_saved; |
75 | struct cpufreq_state cf_state[CPUFREQ_STATE_MAX]; |
76 | #endif /* _KERNEL */ |
77 | }; |
78 | |
79 | #ifdef _KERNEL |
80 | void cpufreq_init(void); |
81 | int cpufreq_register(struct cpufreq *); |
82 | void cpufreq_deregister(void); |
83 | void cpufreq_suspend(struct cpu_info *); |
84 | void cpufreq_resume(struct cpu_info *); |
85 | uint32_t cpufreq_get(struct cpu_info *); |
86 | int cpufreq_get_backend(struct cpufreq *); |
87 | int cpufreq_get_state(uint32_t, struct cpufreq_state *); |
88 | int cpufreq_get_state_index(uint32_t, struct cpufreq_state *); |
89 | void cpufreq_set(struct cpu_info *, uint32_t); |
90 | void cpufreq_set_all(uint32_t); |
91 | #endif /* _KERNEL */ |
92 | |
93 | #endif /* _SYS_CPUFREQ_H_ */ |
94 | |