C++ (Cpp) acpi_cpufreq_add_fileの例

コード例 #1

ファイル: processor_perflib.c プロジェクト: nighthawk149/fvs318g-cfw

int
acpi_processor_register_performance(struct acpi_processor_performance
				    *performance, unsigned int cpu)
{
	struct acpi_processor *pr;

	ACPI_FUNCTION_TRACE("acpi_processor_register_performance");

	if (!(acpi_processor_ppc_status & PPC_REGISTERED))
		return_VALUE(-EINVAL);

	down(&performance_sem);

	pr = processors[cpu];
	if (!pr) {
		up(&performance_sem);
		return_VALUE(-ENODEV);
	}

	if (pr->performance) {
		up(&performance_sem);
		return_VALUE(-EBUSY);
	}

	WARN_ON(!performance);

	pr->performance = performance;

	if (acpi_processor_get_performance_info(pr)) {
		pr->performance = NULL;
		up(&performance_sem);
		return_VALUE(-EIO);
	}

	acpi_cpufreq_add_file(pr);

	up(&performance_sem);
	return_VALUE(0);
}

コード例 #2

ファイル: processor_perflib.c プロジェクト: ivucica/linux

int
acpi_processor_register_performance(struct acpi_processor_performance
				    *performance, unsigned int cpu)
{
	struct acpi_processor *pr;


	if (!(acpi_processor_ppc_status & PPC_REGISTERED))
		return -EINVAL;

	mutex_lock(&performance_mutex);

	pr = processors[cpu];
	if (!pr) {
		mutex_unlock(&performance_mutex);
		return -ENODEV;
	}

	if (pr->performance) {
		mutex_unlock(&performance_mutex);
		return -EBUSY;
	}

	WARN_ON(!performance);

	pr->performance = performance;

	if (acpi_processor_get_performance_info(pr)) {
		pr->performance = NULL;
		mutex_unlock(&performance_mutex);
		return -EIO;
	}

	acpi_cpufreq_add_file(pr);

	mutex_unlock(&performance_mutex);
	return 0;
}

コード例 #3

ファイル: processor_perflib.c プロジェクト: laitianli/kernel-analyze_linux-2.6.18

/**ltl
 * 功能: 对cpu的P-state初始化
 * 参数: performane	->cpu性能对象
 *		cpu		->cpu id
 * 返回值:
 * 说明: 1.读取_PCT和_PSS两个对象信息
 *		2.创建文件/proc/acpi/processor/CPU1/proformance
 */
int
acpi_processor_register_performance(struct acpi_processor_performance
				    *performance, unsigned int cpu)
{
	struct acpi_processor *pr;


	if (!(acpi_processor_ppc_status & PPC_REGISTERED))
		return -EINVAL;

	mutex_lock(&performance_mutex);
	/* acpi_process对象 */
	pr = processors[cpu];
	if (!pr) {
		mutex_unlock(&performance_mutex);
		return -ENODEV;
	}

	if (pr->performance) {
		mutex_unlock(&performance_mutex);
		return -EBUSY;
	}

	WARN_ON(!performance);

	pr->performance = performance; /* 设置cpu性能 */
	/* 读取_PCT、_PSS两个对象信息 */
	if (acpi_processor_get_performance_info(pr)) {
		pr->performance = NULL;
		mutex_unlock(&performance_mutex);
		return -EIO;
	}
	/* 创建文件/proc/acpi/processor/CPU1/proformance */
	acpi_cpufreq_add_file(pr);

	mutex_unlock(&performance_mutex);
	return 0;
}