root / lab4 / .minix-src / include / sys / cpufreq.h @ 13
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1 | 13 | up20180614 | /* $NetBSD: cpufreq.h,v 1.5 2011/10/27 05:13:04 jruoho Exp $ */
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2 | |||
3 | /*-
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4 | * Copyright (c) 2011 The NetBSD Foundation, Inc.
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5 | * All rights reserved.
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6 | *
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7 | * This code is derived from software contributed to The NetBSD Foundation
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8 | * by Jukka Ruohonen.
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9 | *
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10 | * Redistribution and use in source and binary forms, with or without
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11 | * modification, are permitted provided that the following conditions
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12 | * are met:
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13 | *
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14 | * 1. Redistributions of source code must retain the above copyright
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15 | * notice, this list of conditions and the following disclaimer.
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16 | * 2. Redistributions in binary form must reproduce the above copyright
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17 | * notice, this list of conditions and the following disclaimer in the
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18 | * documentation and/or other materials provided with the distribution.
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19 | *
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20 | * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
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21 | * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
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22 | * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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23 | * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
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24 | * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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25 | * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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26 | * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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27 | * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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28 | * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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29 | * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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30 | * POSSIBILITY OF SUCH DAMAGE.
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31 | */
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32 | #ifndef _SYS_CPUFREQ_H_
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33 | #define _SYS_CPUFREQ_H_
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34 | |||
35 | #ifndef _KERNEL
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36 | #include <stdbool.h> |
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37 | #endif
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38 | |||
39 | #ifdef _KERNEL
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40 | #ifndef _SYS_XCALL_H_
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41 | #include <sys/xcall.h> |
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42 | #endif
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43 | #endif
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44 | |||
45 | #define CPUFREQ_NAME_MAX 16 |
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46 | #define CPUFREQ_STATE_MAX 32 |
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47 | #define CPUFREQ_LATENCY_MAX UINT32_MAX
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48 | |||
49 | #define CPUFREQ_STATE_ENABLED UINT32_MAX
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50 | #define CPUFREQ_STATE_DISABLED UINT32_MAX - 1 |
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51 | |||
52 | struct cpufreq_state {
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53 | uint32_t cfs_freq; /* MHz */
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54 | uint32_t cfs_power; /* mW */
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55 | uint32_t cfs_latency; /* usec */
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56 | uint32_t cfs_index; |
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57 | uint32_t cfs_reserved[5];
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58 | }; |
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59 | |||
60 | struct cpufreq {
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61 | char cf_name[CPUFREQ_NAME_MAX];
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62 | uint32_t cf_state_count; |
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63 | uint32_t cf_state_target; |
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64 | uint32_t cf_state_current; |
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65 | uint32_t cf_reserved[5];
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66 | u_int cf_index; |
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67 | |||
68 | #ifdef _KERNEL
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69 | bool cf_mp;
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70 | bool cf_init;
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71 | void *cf_cookie;
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72 | xcfunc_t cf_get_freq; |
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73 | xcfunc_t cf_set_freq; |
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74 | uint32_t cf_state_saved; |
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75 | struct cpufreq_state cf_state[CPUFREQ_STATE_MAX];
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76 | #endif /* _KERNEL */ |
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77 | }; |
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78 | |||
79 | #ifdef _KERNEL
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80 | void cpufreq_init(void); |
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81 | int cpufreq_register(struct cpufreq *); |
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82 | void cpufreq_deregister(void); |
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83 | void cpufreq_suspend(struct cpu_info *); |
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84 | void cpufreq_resume(struct cpu_info *); |
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85 | uint32_t cpufreq_get(struct cpu_info *);
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86 | int cpufreq_get_backend(struct cpufreq *); |
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87 | int cpufreq_get_state(uint32_t, struct cpufreq_state *); |
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88 | int cpufreq_get_state_index(uint32_t, struct cpufreq_state *); |
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89 | void cpufreq_set(struct cpu_info *, uint32_t); |
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90 | void cpufreq_set_all(uint32_t);
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91 | #endif /* _KERNEL */ |
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92 | |||
93 | #endif /* _SYS_CPUFREQ_H_ */ |