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head/sys/sys/cpu.h
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* levels of 50, 100, 150, 200, 300, 400. | * levels of 50, 100, 150, 200, 300, 400. | ||||
* | * | ||||
* The "info only" flag signifies that settings returned by | * The "info only" flag signifies that settings returned by | ||||
* CPUFREQ_DRV_SETTINGS cannot be passed to the CPUFREQ_DRV_SET method and | * CPUFREQ_DRV_SETTINGS cannot be passed to the CPUFREQ_DRV_SET method and | ||||
* are only informational. This is for some drivers that can return | * are only informational. This is for some drivers that can return | ||||
* information about settings but rely on another machine-dependent driver | * information about settings but rely on another machine-dependent driver | ||||
* for actually performing the frequency transition (e.g., ACPI performance | * for actually performing the frequency transition (e.g., ACPI performance | ||||
* states of type "functional fixed hardware.") | * states of type "functional fixed hardware.") | ||||
* | |||||
* The "uncached" flag tells CPUFREQ_DRV_GET to try obtaining the real | |||||
* instantaneous frequency from the underlying hardware regardless of cached | |||||
* state. It is probably a bug to not combine this with "info only" | |||||
*/ | */ | ||||
#define CPUFREQ_TYPE_MASK 0xffff | #define CPUFREQ_TYPE_MASK 0xffff | ||||
#define CPUFREQ_TYPE_RELATIVE (1<<0) | #define CPUFREQ_TYPE_RELATIVE (1<<0) | ||||
#define CPUFREQ_TYPE_ABSOLUTE (1<<1) | #define CPUFREQ_TYPE_ABSOLUTE (1<<1) | ||||
#define CPUFREQ_FLAG_INFO_ONLY (1<<16) | #define CPUFREQ_FLAG_INFO_ONLY (1<<16) | ||||
#define CPUFREQ_FLAG_UNCACHED (1<<17) | |||||
/* | /* | ||||
* When setting a level, the caller indicates the priority of this request. | * When setting a level, the caller indicates the priority of this request. | ||||
* Priorities determine, among other things, whether a level can be | * Priorities determine, among other things, whether a level can be | ||||
* overridden by other callers. For example, if the user sets a level but | * overridden by other callers. For example, if the user sets a level but | ||||
* the system thermal driver needs to override it for emergency cooling, | * the system thermal driver needs to override it for emergency cooling, | ||||
* the driver would use a higher priority. Once the event has passed, the | * the driver would use a higher priority. Once the event has passed, the | ||||
* driver would call cpufreq to resume any previous level. | * driver would call cpufreq to resume any previous level. | ||||
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