| 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 | |