author | Florian Westphal <fw@strlen.de> |
Sun, 11 Jan 2009 20:20:11 +0100 | |
changeset 0 | aa628870c1d3 |
child 2 | d1f6d8b6f81c |
permissions | -rw-r--r-- |
0
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Port of Linux 2.6.28 for use with network simulation cradle.
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/* |
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* linux/include/linux/cpufreq.h |
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* |
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* Copyright (C) 2001 Russell King |
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* (C) 2002 - 2003 Dominik Brodowski <linux@brodo.de> |
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* |
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* This program is free software; you can redistribute it and/or modify |
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* it under the terms of the GNU General Public License version 2 as |
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* published by the Free Software Foundation. |
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Port of Linux 2.6.28 for use with network simulation cradle.
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*/ |
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#ifndef _LINUX_CPUFREQ_H |
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#define _LINUX_CPUFREQ_H |
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|
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#include <linux/mutex.h> |
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#include <linux/notifier.h> |
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#include <linux/threads.h> |
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#include <linux/device.h> |
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#include <linux/kobject.h> |
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#include <linux/sysfs.h> |
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#include <linux/completion.h> |
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#include <linux/workqueue.h> |
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#include <linux/cpumask.h> |
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#include <asm/div64.h> |
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#define CPUFREQ_NAME_LEN 16 |
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|
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/********************************************************************* |
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* CPUFREQ NOTIFIER INTERFACE * |
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*********************************************************************/ |
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|
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#define CPUFREQ_TRANSITION_NOTIFIER (0) |
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#define CPUFREQ_POLICY_NOTIFIER (1) |
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|
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#ifdef CONFIG_CPU_FREQ |
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int cpufreq_register_notifier(struct notifier_block *nb, unsigned int list); |
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int cpufreq_unregister_notifier(struct notifier_block *nb, unsigned int list); |
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#else /* CONFIG_CPU_FREQ */ |
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static inline int cpufreq_register_notifier(struct notifier_block *nb, |
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unsigned int list) |
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{ |
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return 0; |
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} |
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static inline int cpufreq_unregister_notifier(struct notifier_block *nb, |
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unsigned int list) |
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{ |
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return 0; |
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} |
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#endif /* CONFIG_CPU_FREQ */ |
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|
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/* if (cpufreq_driver->target) exists, the ->governor decides what frequency |
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* within the limits is used. If (cpufreq_driver->setpolicy> exists, these |
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* two generic policies are available: |
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*/ |
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|
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#define CPUFREQ_POLICY_POWERSAVE (1) |
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#define CPUFREQ_POLICY_PERFORMANCE (2) |
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|
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/* Frequency values here are CPU kHz so that hardware which doesn't run |
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* with some frequencies can complain without having to guess what per |
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* cent / per mille means. |
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* Maximum transition latency is in nanoseconds - if it's unknown, |
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* CPUFREQ_ETERNAL shall be used. |
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*/ |
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|
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struct cpufreq_governor; |
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#define CPUFREQ_ETERNAL (-1) |
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struct cpufreq_cpuinfo { |
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unsigned int max_freq; |
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unsigned int min_freq; |
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unsigned int transition_latency; /* in 10^(-9) s = nanoseconds */ |
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}; |
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struct cpufreq_real_policy { |
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unsigned int min; /* in kHz */ |
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unsigned int max; /* in kHz */ |
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unsigned int policy; /* see above */ |
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struct cpufreq_governor *governor; /* see below */ |
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}; |
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struct cpufreq_policy { |
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cpumask_t cpus; /* CPUs requiring sw coordination */ |
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cpumask_t related_cpus; /* CPUs with any coordination */ |
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unsigned int shared_type; /* ANY or ALL affected CPUs |
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should set cpufreq */ |
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unsigned int cpu; /* cpu nr of registered CPU */ |
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struct cpufreq_cpuinfo cpuinfo;/* see above */ |
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unsigned int min; /* in kHz */ |
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unsigned int max; /* in kHz */ |
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unsigned int cur; /* in kHz, only needed if cpufreq |
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* governors are used */ |
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unsigned int policy; /* see above */ |
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struct cpufreq_governor *governor; /* see below */ |
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struct work_struct update; /* if update_policy() needs to be |
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* called, but you're in IRQ context */ |
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|
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struct cpufreq_real_policy user_policy; |
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struct kobject kobj; |
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struct completion kobj_unregister; |
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}; |
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#define CPUFREQ_ADJUST (0) |
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#define CPUFREQ_INCOMPATIBLE (1) |
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#define CPUFREQ_NOTIFY (2) |
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#define CPUFREQ_START (3) |
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#define CPUFREQ_SHARED_TYPE_NONE (0) /* None */ |
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#define CPUFREQ_SHARED_TYPE_HW (1) /* HW does needed coordination */ |
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#define CPUFREQ_SHARED_TYPE_ALL (2) /* All dependent CPUs should set freq */ |
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#define CPUFREQ_SHARED_TYPE_ANY (3) /* Freq can be set from any dependent CPU*/ |
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|
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/******************** cpufreq transition notifiers *******************/ |
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#define CPUFREQ_PRECHANGE (0) |
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#define CPUFREQ_POSTCHANGE (1) |
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#define CPUFREQ_RESUMECHANGE (8) |
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#define CPUFREQ_SUSPENDCHANGE (9) |
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struct cpufreq_freqs { |
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unsigned int cpu; /* cpu nr */ |
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unsigned int old; |
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unsigned int new; |
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u8 flags; /* flags of cpufreq_driver, see below. */ |
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}; |
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/** |
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* cpufreq_scale - "old * mult / div" calculation for large values (32-bit-arch safe) |
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* @old: old value |
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* @div: divisor |
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* @mult: multiplier |
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* |
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* |
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* new = old * mult / div |
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*/ |
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static inline unsigned long cpufreq_scale(unsigned long old, u_int div, u_int mult) |
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{ |
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#if BITS_PER_LONG == 32 |
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u64 result = ((u64) old) * ((u64) mult); |
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do_div(result, div); |
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return (unsigned long) result; |
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#elif BITS_PER_LONG == 64 |
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unsigned long result = old * ((u64) mult); |
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result /= div; |
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return result; |
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#endif |
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}; |
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/********************************************************************* |
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* CPUFREQ GOVERNORS * |
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*********************************************************************/ |
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#define CPUFREQ_GOV_START 1 |
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#define CPUFREQ_GOV_STOP 2 |
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#define CPUFREQ_GOV_LIMITS 3 |
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struct cpufreq_governor { |
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char name[CPUFREQ_NAME_LEN]; |
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int (*governor) (struct cpufreq_policy *policy, |
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unsigned int event); |
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ssize_t (*show_setspeed) (struct cpufreq_policy *policy, |
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char *buf); |
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int (*store_setspeed) (struct cpufreq_policy *policy, |
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unsigned int freq); |
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unsigned int max_transition_latency; /* HW must be able to switch to |
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next freq faster than this value in nano secs or we |
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will fallback to performance governor */ |
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struct list_head governor_list; |
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struct module *owner; |
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}; |
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|
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/* pass a target to the cpufreq driver |
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*/ |
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extern int cpufreq_driver_target(struct cpufreq_policy *policy, |
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unsigned int target_freq, |
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unsigned int relation); |
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extern int __cpufreq_driver_target(struct cpufreq_policy *policy, |
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unsigned int target_freq, |
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unsigned int relation); |
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|
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extern int __cpufreq_driver_getavg(struct cpufreq_policy *policy, |
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unsigned int cpu); |
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int cpufreq_register_governor(struct cpufreq_governor *governor); |
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void cpufreq_unregister_governor(struct cpufreq_governor *governor); |
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int lock_policy_rwsem_read(int cpu); |
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int lock_policy_rwsem_write(int cpu); |
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void unlock_policy_rwsem_read(int cpu); |
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void unlock_policy_rwsem_write(int cpu); |
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/********************************************************************* |
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* CPUFREQ DRIVER INTERFACE * |
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*********************************************************************/ |
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#define CPUFREQ_RELATION_L 0 /* lowest frequency at or above target */ |
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#define CPUFREQ_RELATION_H 1 /* highest frequency below or at target */ |
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struct freq_attr; |
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struct cpufreq_driver { |
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struct module *owner; |
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213 |
char name[CPUFREQ_NAME_LEN]; |
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u8 flags; |
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215 |
|
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/* needed by all drivers */ |
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int (*init) (struct cpufreq_policy *policy); |
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int (*verify) (struct cpufreq_policy *policy); |
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|
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/* define one out of two */ |
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int (*setpolicy) (struct cpufreq_policy *policy); |
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int (*target) (struct cpufreq_policy *policy, |
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223 |
unsigned int target_freq, |
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224 |
unsigned int relation); |
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225 |
|
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226 |
/* should be defined, if possible */ |
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unsigned int (*get) (unsigned int cpu); |
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228 |
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/* optional */ |
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unsigned int (*getavg) (struct cpufreq_policy *policy, |
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unsigned int cpu); |
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|
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int (*exit) (struct cpufreq_policy *policy); |
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int (*suspend) (struct cpufreq_policy *policy, pm_message_t pmsg); |
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int (*resume) (struct cpufreq_policy *policy); |
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struct freq_attr **attr; |
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}; |
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/* flags */ |
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|
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#define CPUFREQ_STICKY 0x01 /* the driver isn't removed even if |
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* all ->init() calls failed */ |
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#define CPUFREQ_CONST_LOOPS 0x02 /* loops_per_jiffy or other kernel |
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* "constants" aren't affected by |
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* frequency transitions */ |
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#define CPUFREQ_PM_NO_WARN 0x04 /* don't warn on suspend/resume speed |
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* mismatches */ |
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248 |
|
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int cpufreq_register_driver(struct cpufreq_driver *driver_data); |
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int cpufreq_unregister_driver(struct cpufreq_driver *driver_data); |
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|
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void cpufreq_notify_transition(struct cpufreq_freqs *freqs, unsigned int state); |
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|
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static inline void cpufreq_verify_within_limits(struct cpufreq_policy *policy, unsigned int min, unsigned int max) |
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{ |
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if (policy->min < min) |
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policy->min = min; |
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if (policy->max < min) |
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policy->max = min; |
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if (policy->min > max) |
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policy->min = max; |
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if (policy->max > max) |
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policy->max = max; |
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if (policy->min > policy->max) |
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policy->min = policy->max; |
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return; |
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} |
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|
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struct freq_attr { |
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struct attribute attr; |
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ssize_t (*show)(struct cpufreq_policy *, char *); |
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ssize_t (*store)(struct cpufreq_policy *, const char *, size_t count); |
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}; |
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278 |
/********************************************************************* |
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279 |
* CPUFREQ 2.6. INTERFACE * |
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*********************************************************************/ |
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Port of Linux 2.6.28 for use with network simulation cradle.
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int cpufreq_get_policy(struct cpufreq_policy *policy, unsigned int cpu); |
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int cpufreq_update_policy(unsigned int cpu); |
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283 |
|
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Port of Linux 2.6.28 for use with network simulation cradle.
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284 |
/* query the current CPU frequency (in kHz). If zero, cpufreq couldn't detect it */ |
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Port of Linux 2.6.28 for use with network simulation cradle.
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parents:
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285 |
unsigned int cpufreq_get(unsigned int cpu); |
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Port of Linux 2.6.28 for use with network simulation cradle.
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286 |
|
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Port of Linux 2.6.28 for use with network simulation cradle.
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287 |
/* query the last known CPU freq (in kHz). If zero, cpufreq couldn't detect it */ |
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Port of Linux 2.6.28 for use with network simulation cradle.
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parents:
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|
288 |
#ifdef CONFIG_CPU_FREQ |
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289 |
unsigned int cpufreq_quick_get(unsigned int cpu); |
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290 |
#else |
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Port of Linux 2.6.28 for use with network simulation cradle.
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291 |
static inline unsigned int cpufreq_quick_get(unsigned int cpu) |
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292 |
{ |
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Port of Linux 2.6.28 for use with network simulation cradle.
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293 |
return 0; |
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Port of Linux 2.6.28 for use with network simulation cradle.
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parents:
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|
294 |
} |
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Port of Linux 2.6.28 for use with network simulation cradle.
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parents:
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|
295 |
#endif |
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Port of Linux 2.6.28 for use with network simulation cradle.
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296 |
|
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Port of Linux 2.6.28 for use with network simulation cradle.
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297 |
|
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parents:
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|
298 |
/********************************************************************* |
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Port of Linux 2.6.28 for use with network simulation cradle.
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parents:
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|
299 |
* CPUFREQ DEFAULT GOVERNOR * |
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Port of Linux 2.6.28 for use with network simulation cradle.
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parents:
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300 |
*********************************************************************/ |
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Port of Linux 2.6.28 for use with network simulation cradle.
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301 |
|
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Port of Linux 2.6.28 for use with network simulation cradle.
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302 |
|
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Port of Linux 2.6.28 for use with network simulation cradle.
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parents:
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|
303 |
/* |
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Port of Linux 2.6.28 for use with network simulation cradle.
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parents:
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|
304 |
Performance governor is fallback governor if any other gov failed to |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
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|
305 |
auto load due latency restrictions |
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Port of Linux 2.6.28 for use with network simulation cradle.
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parents:
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|
306 |
*/ |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
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parents:
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|
307 |
#ifdef CONFIG_CPU_FREQ_GOV_PERFORMANCE |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
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parents:
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|
308 |
extern struct cpufreq_governor cpufreq_gov_performance; |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
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parents:
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|
309 |
#endif |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
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parents:
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|
310 |
#ifdef CONFIG_CPU_FREQ_DEFAULT_GOV_PERFORMANCE |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
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parents:
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|
311 |
#define CPUFREQ_DEFAULT_GOVERNOR (&cpufreq_gov_performance) |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
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parents:
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|
312 |
#elif defined(CONFIG_CPU_FREQ_DEFAULT_GOV_POWERSAVE) |
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Port of Linux 2.6.28 for use with network simulation cradle.
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parents:
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|
313 |
extern struct cpufreq_governor cpufreq_gov_powersave; |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
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parents:
diff
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|
314 |
#define CPUFREQ_DEFAULT_GOVERNOR (&cpufreq_gov_powersave) |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
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parents:
diff
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|
315 |
#elif defined(CONFIG_CPU_FREQ_DEFAULT_GOV_USERSPACE) |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
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parents:
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|
316 |
extern struct cpufreq_governor cpufreq_gov_userspace; |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
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|
317 |
#define CPUFREQ_DEFAULT_GOVERNOR (&cpufreq_gov_userspace) |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
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parents:
diff
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|
318 |
#elif defined(CONFIG_CPU_FREQ_DEFAULT_GOV_ONDEMAND) |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
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|
319 |
extern struct cpufreq_governor cpufreq_gov_ondemand; |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
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|
320 |
#define CPUFREQ_DEFAULT_GOVERNOR (&cpufreq_gov_ondemand) |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
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parents:
diff
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|
321 |
#elif defined(CONFIG_CPU_FREQ_DEFAULT_GOV_CONSERVATIVE) |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
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parents:
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|
322 |
extern struct cpufreq_governor cpufreq_gov_conservative; |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
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|
323 |
#define CPUFREQ_DEFAULT_GOVERNOR (&cpufreq_gov_conservative) |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
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parents:
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|
324 |
#endif |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
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parents:
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|
325 |
|
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Port of Linux 2.6.28 for use with network simulation cradle.
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parents:
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|
326 |
|
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
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parents:
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|
327 |
/********************************************************************* |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
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|
328 |
* FREQUENCY TABLE HELPERS * |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
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|
329 |
*********************************************************************/ |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
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parents:
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|
330 |
|
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
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|
331 |
#define CPUFREQ_ENTRY_INVALID ~0 |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
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parents:
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|
332 |
#define CPUFREQ_TABLE_END ~1 |
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Port of Linux 2.6.28 for use with network simulation cradle.
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parents:
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|
333 |
|
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
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parents:
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|
334 |
struct cpufreq_frequency_table { |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
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parents:
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|
335 |
unsigned int index; /* any */ |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
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|
336 |
unsigned int frequency; /* kHz - doesn't need to be in ascending |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
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parents:
diff
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|
337 |
* order */ |
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Port of Linux 2.6.28 for use with network simulation cradle.
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parents:
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|
338 |
}; |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
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parents:
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|
339 |
|
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
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|
340 |
int cpufreq_frequency_table_cpuinfo(struct cpufreq_policy *policy, |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
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|
341 |
struct cpufreq_frequency_table *table); |
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
changeset
|
342 |
|
aa628870c1d3
Port of Linux 2.6.28 for use with network simulation cradle.
Florian Westphal <fw@strlen.de>
parents:
diff
changeset
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343 |
int cpufreq_frequency_table_verify(struct cpufreq_policy *policy, |
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struct cpufreq_frequency_table *table); |
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int cpufreq_frequency_table_target(struct cpufreq_policy *policy, |
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struct cpufreq_frequency_table *table, |
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unsigned int target_freq, |
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unsigned int relation, |
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unsigned int *index); |
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/* the following 3 funtions are for cpufreq core use only */ |
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struct cpufreq_frequency_table *cpufreq_frequency_get_table(unsigned int cpu); |
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struct cpufreq_policy *cpufreq_cpu_get(unsigned int cpu); |
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void cpufreq_cpu_put (struct cpufreq_policy *data); |
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/* the following are really really optional */ |
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extern struct freq_attr cpufreq_freq_attr_scaling_available_freqs; |
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void cpufreq_frequency_table_get_attr(struct cpufreq_frequency_table *table, |
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unsigned int cpu); |
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void cpufreq_frequency_table_put_attr(unsigned int cpu); |
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/********************************************************************* |
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* UNIFIED DEBUG HELPERS * |
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*********************************************************************/ |
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#define CPUFREQ_DEBUG_CORE 1 |
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#define CPUFREQ_DEBUG_DRIVER 2 |
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#define CPUFREQ_DEBUG_GOVERNOR 4 |
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#ifdef CONFIG_CPU_FREQ_DEBUG |
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extern void cpufreq_debug_printk(unsigned int type, const char *prefix, |
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const char *fmt, ...); |
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#else |
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#define cpufreq_debug_printk(msg...) do { } while(0) |
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#endif /* CONFIG_CPU_FREQ_DEBUG */ |
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#endif /* _LINUX_CPUFREQ_H */ |