#include <linux/notifier.h>
#include <linux/sysfs.h>
-#define CPUFREQ_NAME_LEN 16
-/* Print length for names. Extra 1 space for accomodating '\n' in prints */
-#define CPUFREQ_NAME_PLEN (CPUFREQ_NAME_LEN + 1)
-
/*********************************************************************
- * CPUFREQ NOTIFIER INTERFACE *
+ * CPUFREQ INTERFACE *
*********************************************************************/
-
-#define CPUFREQ_TRANSITION_NOTIFIER (0)
-#define CPUFREQ_POLICY_NOTIFIER (1)
-
-#ifdef CONFIG_CPU_FREQ
-int cpufreq_register_notifier(struct notifier_block *nb, unsigned int list);
-int cpufreq_unregister_notifier(struct notifier_block *nb, unsigned int list);
-extern void disable_cpufreq(void);
-#else /* CONFIG_CPU_FREQ */
-static inline int cpufreq_register_notifier(struct notifier_block *nb,
- unsigned int list)
-{
- return 0;
-}
-static inline int cpufreq_unregister_notifier(struct notifier_block *nb,
- unsigned int list)
-{
- return 0;
-}
-static inline void disable_cpufreq(void) { }
-#endif /* CONFIG_CPU_FREQ */
-
-/* if (cpufreq_driver->target) exists, the ->governor decides what frequency
- * within the limits is used. If (cpufreq_driver->setpolicy> exists, these
- * two generic policies are available:
- */
-
-#define CPUFREQ_POLICY_POWERSAVE (1)
-#define CPUFREQ_POLICY_PERFORMANCE (2)
-
-/* Frequency values here are CPU kHz so that hardware which doesn't run
- * with some frequencies can complain without having to guess what per
- * cent / per mille means.
+/*
+ * Frequency values here are CPU kHz
+ *
* Maximum transition latency is in nanoseconds - if it's unknown,
* CPUFREQ_ETERNAL shall be used.
*/
+#define CPUFREQ_ETERNAL (-1)
+#define CPUFREQ_NAME_LEN 16
+/* Print length for names. Extra 1 space for accomodating '\n' in prints */
+#define CPUFREQ_NAME_PLEN (CPUFREQ_NAME_LEN + 1)
+
struct cpufreq_governor;
-/* /sys/devices/system/cpu/cpufreq: entry point for global variables */
-extern struct kobject *cpufreq_global_kobject;
-int cpufreq_get_global_kobject(void);
-void cpufreq_put_global_kobject(void);
-int cpufreq_sysfs_create_file(const struct attribute *attr);
-void cpufreq_sysfs_remove_file(const struct attribute *attr);
+struct cpufreq_freqs {
+ unsigned int cpu; /* cpu nr */
+ unsigned int old;
+ unsigned int new;
+ u8 flags; /* flags of cpufreq_driver, see below. */
+};
-#define CPUFREQ_ETERNAL (-1)
struct cpufreq_cpuinfo {
unsigned int max_freq;
unsigned int min_freq;
int transition_ongoing; /* Tracks transition status */
};
-#define CPUFREQ_ADJUST (0)
-#define CPUFREQ_INCOMPATIBLE (1)
-#define CPUFREQ_NOTIFY (2)
-#define CPUFREQ_START (3)
-#define CPUFREQ_UPDATE_POLICY_CPU (4)
-
/* Only for ACPI */
#define CPUFREQ_SHARED_TYPE_NONE (0) /* None */
#define CPUFREQ_SHARED_TYPE_HW (1) /* HW does needed coordination */
#define CPUFREQ_SHARED_TYPE_ALL (2) /* All dependent CPUs should set freq */
#define CPUFREQ_SHARED_TYPE_ANY (3) /* Freq can be set from any dependent CPU*/
+struct cpufreq_policy *cpufreq_cpu_get(unsigned int cpu);
+void cpufreq_cpu_put(struct cpufreq_policy *data);
+
static inline bool policy_is_shared(struct cpufreq_policy *policy)
{
return cpumask_weight(policy->cpus) > 1;
}
-/******************** cpufreq transition notifiers *******************/
-
-#define CPUFREQ_PRECHANGE (0)
-#define CPUFREQ_POSTCHANGE (1)
-#define CPUFREQ_RESUMECHANGE (8)
-#define CPUFREQ_SUSPENDCHANGE (9)
+/* /sys/devices/system/cpu/cpufreq: entry point for global variables */
+extern struct kobject *cpufreq_global_kobject;
+int cpufreq_get_global_kobject(void);
+void cpufreq_put_global_kobject(void);
+int cpufreq_sysfs_create_file(const struct attribute *attr);
+void cpufreq_sysfs_remove_file(const struct attribute *attr);
-struct cpufreq_freqs {
- unsigned int cpu; /* cpu nr */
- unsigned int old;
- unsigned int new;
- u8 flags; /* flags of cpufreq_driver, see below. */
-};
+#ifdef CONFIG_CPU_FREQ
+unsigned int cpufreq_get(unsigned int cpu);
+unsigned int cpufreq_quick_get(unsigned int cpu);
+unsigned int cpufreq_quick_get_max(unsigned int cpu);
+void disable_cpufreq(void);
-/**
- * cpufreq_scale - "old * mult / div" calculation for large values (32-bit-arch
- * safe)
- * @old: old value
- * @div: divisor
- * @mult: multiplier
- *
- *
- * new = old * mult / div
- */
-static inline unsigned long cpufreq_scale(unsigned long old, u_int div,
- u_int mult)
+u64 get_cpu_idle_time(unsigned int cpu, u64 *wall, int io_busy);
+int cpufreq_get_policy(struct cpufreq_policy *policy, unsigned int cpu);
+int cpufreq_update_policy(unsigned int cpu);
+bool have_governor_per_policy(void);
+struct kobject *get_governor_parent_kobj(struct cpufreq_policy *policy);
+#else
+static inline unsigned int cpufreq_get(unsigned int cpu)
{
-#if BITS_PER_LONG == 32
-
- u64 result = ((u64) old) * ((u64) mult);
- do_div(result, div);
- return (unsigned long) result;
-
-#elif BITS_PER_LONG == 64
-
- unsigned long result = old * ((u64) mult);
- result /= div;
- return result;
-
+ return 0;
+}
+static inline unsigned int cpufreq_quick_get(unsigned int cpu)
+{
+ return 0;
+}
+static inline unsigned int cpufreq_quick_get_max(unsigned int cpu)
+{
+ return 0;
+}
+static inline void disable_cpufreq(void) { }
#endif
-};
/*********************************************************************
- * CPUFREQ GOVERNORS *
+ * CPUFREQ DRIVER INTERFACE *
*********************************************************************/
-#define CPUFREQ_GOV_START 1
-#define CPUFREQ_GOV_STOP 2
-#define CPUFREQ_GOV_LIMITS 3
-#define CPUFREQ_GOV_POLICY_INIT 4
-#define CPUFREQ_GOV_POLICY_EXIT 5
+#define CPUFREQ_RELATION_L 0 /* lowest frequency at or above target */
+#define CPUFREQ_RELATION_H 1 /* highest frequency below or at target */
-struct cpufreq_governor {
- char name[CPUFREQ_NAME_LEN];
- int initialized;
- int (*governor) (struct cpufreq_policy *policy,
- unsigned int event);
- ssize_t (*show_setspeed) (struct cpufreq_policy *policy,
- char *buf);
- int (*store_setspeed) (struct cpufreq_policy *policy,
- unsigned int freq);
- unsigned int max_transition_latency; /* HW must be able to switch to
- next freq faster than this value in nano secs or we
- will fallback to performance governor */
- struct list_head governor_list;
- struct module *owner;
+struct freq_attr {
+ struct attribute attr;
+ ssize_t (*show)(struct cpufreq_policy *, char *);
+ ssize_t (*store)(struct cpufreq_policy *, const char *, size_t count);
};
-/*
- * Pass a target to the cpufreq driver.
- */
-extern int cpufreq_driver_target(struct cpufreq_policy *policy,
- unsigned int target_freq,
- unsigned int relation);
-extern int __cpufreq_driver_target(struct cpufreq_policy *policy,
- unsigned int target_freq,
- unsigned int relation);
-int cpufreq_register_governor(struct cpufreq_governor *governor);
-void cpufreq_unregister_governor(struct cpufreq_governor *governor);
+#define cpufreq_freq_attr_ro(_name) \
+static struct freq_attr _name = \
+__ATTR(_name, 0444, show_##_name, NULL)
-/*********************************************************************
- * CPUFREQ DRIVER INTERFACE *
- *********************************************************************/
+#define cpufreq_freq_attr_ro_perm(_name, _perm) \
+static struct freq_attr _name = \
+__ATTR(_name, _perm, show_##_name, NULL)
-#define CPUFREQ_RELATION_L 0 /* lowest frequency at or above target */
-#define CPUFREQ_RELATION_H 1 /* highest frequency below or at target */
+#define cpufreq_freq_attr_rw(_name) \
+static struct freq_attr _name = \
+__ATTR(_name, 0644, show_##_name, store_##_name)
+
+struct global_attr {
+ struct attribute attr;
+ ssize_t (*show)(struct kobject *kobj,
+ struct attribute *attr, char *buf);
+ ssize_t (*store)(struct kobject *a, struct attribute *b,
+ const char *c, size_t count);
+};
+
+#define define_one_global_ro(_name) \
+static struct global_attr _name = \
+__ATTR(_name, 0444, show_##_name, NULL)
+
+#define define_one_global_rw(_name) \
+static struct global_attr _name = \
+__ATTR(_name, 0644, show_##_name, store_##_name)
-struct freq_attr;
struct cpufreq_driver {
struct module *owner;
};
/* flags */
-
#define CPUFREQ_STICKY 0x01 /* the driver isn't removed even if
* all ->init() calls failed */
#define CPUFREQ_CONST_LOOPS 0x02 /* loops_per_jiffy or other kernel
int cpufreq_register_driver(struct cpufreq_driver *driver_data);
int cpufreq_unregister_driver(struct cpufreq_driver *driver_data);
-void cpufreq_notify_transition(struct cpufreq_policy *policy,
- struct cpufreq_freqs *freqs, unsigned int state);
+const char *cpufreq_get_current_driver(void);
static inline void cpufreq_verify_within_limits(struct cpufreq_policy *policy,
unsigned int min, unsigned int max)
return;
}
-struct freq_attr {
- struct attribute attr;
- ssize_t (*show)(struct cpufreq_policy *, char *);
- ssize_t (*store)(struct cpufreq_policy *, const char *, size_t count);
-};
-
-#define cpufreq_freq_attr_ro(_name) \
-static struct freq_attr _name = \
-__ATTR(_name, 0444, show_##_name, NULL)
-
-#define cpufreq_freq_attr_ro_perm(_name, _perm) \
-static struct freq_attr _name = \
-__ATTR(_name, _perm, show_##_name, NULL)
-
-#define cpufreq_freq_attr_rw(_name) \
-static struct freq_attr _name = \
-__ATTR(_name, 0644, show_##_name, store_##_name)
+/*********************************************************************
+ * CPUFREQ NOTIFIER INTERFACE *
+ *********************************************************************/
-struct global_attr {
- struct attribute attr;
- ssize_t (*show)(struct kobject *kobj,
- struct attribute *attr, char *buf);
- ssize_t (*store)(struct kobject *a, struct attribute *b,
- const char *c, size_t count);
-};
+#define CPUFREQ_TRANSITION_NOTIFIER (0)
+#define CPUFREQ_POLICY_NOTIFIER (1)
-#define define_one_global_ro(_name) \
-static struct global_attr _name = \
-__ATTR(_name, 0444, show_##_name, NULL)
+/* Transition notifiers */
+#define CPUFREQ_PRECHANGE (0)
+#define CPUFREQ_POSTCHANGE (1)
+#define CPUFREQ_RESUMECHANGE (8)
+#define CPUFREQ_SUSPENDCHANGE (9)
-#define define_one_global_rw(_name) \
-static struct global_attr _name = \
-__ATTR(_name, 0644, show_##_name, store_##_name)
+/* Policy Notifiers */
+#define CPUFREQ_ADJUST (0)
+#define CPUFREQ_INCOMPATIBLE (1)
+#define CPUFREQ_NOTIFY (2)
+#define CPUFREQ_START (3)
+#define CPUFREQ_UPDATE_POLICY_CPU (4)
-struct cpufreq_policy *cpufreq_cpu_get(unsigned int cpu);
-void cpufreq_cpu_put(struct cpufreq_policy *data);
-const char *cpufreq_get_current_driver(void);
+#ifdef CONFIG_CPU_FREQ
+int cpufreq_register_notifier(struct notifier_block *nb, unsigned int list);
+int cpufreq_unregister_notifier(struct notifier_block *nb, unsigned int list);
-/*********************************************************************
- * CPUFREQ 2.6. INTERFACE *
- *********************************************************************/
-u64 get_cpu_idle_time(unsigned int cpu, u64 *wall, int io_busy);
-int cpufreq_get_policy(struct cpufreq_policy *policy, unsigned int cpu);
-int cpufreq_update_policy(unsigned int cpu);
-bool have_governor_per_policy(void);
-struct kobject *get_governor_parent_kobj(struct cpufreq_policy *policy);
+void cpufreq_notify_transition(struct cpufreq_policy *policy,
+ struct cpufreq_freqs *freqs, unsigned int state);
-#ifdef CONFIG_CPU_FREQ
-/*
- * query the current CPU frequency (in kHz). If zero, cpufreq couldn't detect it
- */
-unsigned int cpufreq_get(unsigned int cpu);
-#else
-static inline unsigned int cpufreq_get(unsigned int cpu)
+#else /* CONFIG_CPU_FREQ */
+static inline int cpufreq_register_notifier(struct notifier_block *nb,
+ unsigned int list)
{
return 0;
}
-#endif
-
-/*
- * query the last known CPU freq (in kHz). If zero, cpufreq couldn't detect it
- */
-#ifdef CONFIG_CPU_FREQ
-unsigned int cpufreq_quick_get(unsigned int cpu);
-unsigned int cpufreq_quick_get_max(unsigned int cpu);
-#else
-static inline unsigned int cpufreq_quick_get(unsigned int cpu)
+static inline int cpufreq_unregister_notifier(struct notifier_block *nb,
+ unsigned int list)
{
return 0;
}
-static inline unsigned int cpufreq_quick_get_max(unsigned int cpu)
+#endif /* !CONFIG_CPU_FREQ */
+
+/**
+ * cpufreq_scale - "old * mult / div" calculation for large values (32-bit-arch
+ * safe)
+ * @old: old value
+ * @div: divisor
+ * @mult: multiplier
+ *
+ *
+ * new = old * mult / div
+ */
+static inline unsigned long cpufreq_scale(unsigned long old, u_int div,
+ u_int mult)
{
- return 0;
-}
+#if BITS_PER_LONG == 32
+ u64 result = ((u64) old) * ((u64) mult);
+ do_div(result, div);
+ return (unsigned long) result;
+
+#elif BITS_PER_LONG == 64
+ unsigned long result = old * ((u64) mult);
+ result /= div;
+ return result;
#endif
+}
/*********************************************************************
- * CPUFREQ DEFAULT GOVERNOR *
+ * CPUFREQ GOVERNORS *
*********************************************************************/
+/*
+ * If (cpufreq_driver->target) exists, the ->governor decides what frequency
+ * within the limits is used. If (cpufreq_driver->setpolicy> exists, these
+ * two generic policies are available:
+ */
+#define CPUFREQ_POLICY_POWERSAVE (1)
+#define CPUFREQ_POLICY_PERFORMANCE (2)
+
+/* Governor Events */
+#define CPUFREQ_GOV_START 1
+#define CPUFREQ_GOV_STOP 2
+#define CPUFREQ_GOV_LIMITS 3
+#define CPUFREQ_GOV_POLICY_INIT 4
+#define CPUFREQ_GOV_POLICY_EXIT 5
+
+struct cpufreq_governor {
+ char name[CPUFREQ_NAME_LEN];
+ int initialized;
+ int (*governor) (struct cpufreq_policy *policy,
+ unsigned int event);
+ ssize_t (*show_setspeed) (struct cpufreq_policy *policy,
+ char *buf);
+ int (*store_setspeed) (struct cpufreq_policy *policy,
+ unsigned int freq);
+ unsigned int max_transition_latency; /* HW must be able to switch to
+ next freq faster than this value in nano secs or we
+ will fallback to performance governor */
+ struct list_head governor_list;
+ struct module *owner;
+};
+
+/* Pass a target to the cpufreq driver */
+int cpufreq_driver_target(struct cpufreq_policy *policy,
+ unsigned int target_freq,
+ unsigned int relation);
+int __cpufreq_driver_target(struct cpufreq_policy *policy,
+ unsigned int target_freq,
+ unsigned int relation);
+int cpufreq_register_governor(struct cpufreq_governor *governor);
+void cpufreq_unregister_governor(struct cpufreq_governor *governor);
+
+/* CPUFREQ DEFAULT GOVERNOR */
/*
* Performance governor is fallback governor if any other gov failed to auto
* load due latency restrictions
unsigned int relation,
unsigned int *index);
-/* the following 3 funtions are for cpufreq core use only */
+void cpufreq_frequency_table_update_policy_cpu(struct cpufreq_policy *policy);
+ssize_t cpufreq_show_cpus(const struct cpumask *mask, char *buf);
+
+/* the following funtion is for cpufreq core use only */
struct cpufreq_frequency_table *cpufreq_frequency_get_table(unsigned int cpu);
/* the following are really really optional */
extern struct freq_attr cpufreq_freq_attr_scaling_available_freqs;
-
void cpufreq_frequency_table_get_attr(struct cpufreq_frequency_table *table,
unsigned int cpu);
-void cpufreq_frequency_table_update_policy_cpu(struct cpufreq_policy *policy);
-
void cpufreq_frequency_table_put_attr(unsigned int cpu);
-ssize_t cpufreq_show_cpus(const struct cpumask *mask, char *buf);
-
#endif /* _LINUX_CPUFREQ_H */
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