C++ (Cpp) acpi_processor_cstate_check示例

示例#1

文件： processor_idle.c 项目： kozmikkick/eternityprj-kernel-endeavoru-128

int __cpuinit acpi_processor_power_init(struct acpi_processor *pr,
			      struct acpi_device *device)
{
	acpi_status status = 0;
	static int first_run;

	if (disabled_by_idle_boot_param())
		return 0;

	if (!first_run) {
		dmi_check_system(processor_power_dmi_table);
		max_cstate = acpi_processor_cstate_check(max_cstate);
		if (max_cstate < ACPI_C_STATES_MAX)
			printk(KERN_NOTICE
			       "ACPI: processor limited to max C-state %d\n",
			       max_cstate);
		first_run++;
	}

	if (!pr)
		return -EINVAL;

	if (acpi_gbl_FADT.cst_control && !nocst) {
		status =
		    acpi_os_write_port(acpi_gbl_FADT.smi_command, acpi_gbl_FADT.cst_control, 8);
		if (ACPI_FAILURE(status)) {
			ACPI_EXCEPTION((AE_INFO, status,
					"Notifying BIOS of _CST ability failed"));
		}
	}

	acpi_processor_get_power_info(pr);
	pr->flags.power_setup_done = 1;

	/*
	 * Install the idle handler if processor power management is supported.
	 * Note that we use previously set idle handler will be used on
	 * platforms that only support C1.
	 */
	if (pr->flags.power) {
		acpi_processor_setup_cpuidle(pr);
		if (cpuidle_register_device(&pr->power.dev))
			return -EIO;
	}
	return 0;
}

示例#2

文件： processor_idle.c 项目： AlexShiLucky/linux

static inline void acpi_processor_cstate_first_run_checks(void)
{
	acpi_status status;
	static int first_run;

	if (first_run)
		return;
	dmi_check_system(processor_power_dmi_table);
	max_cstate = acpi_processor_cstate_check(max_cstate);
	if (max_cstate < ACPI_C_STATES_MAX)
		pr_notice("ACPI: processor limited to max C-state %d\n",
			  max_cstate);
	first_run++;

	if (acpi_gbl_FADT.cst_control && !nocst) {
		status = acpi_os_write_port(acpi_gbl_FADT.smi_command,
					    acpi_gbl_FADT.cst_control, 8);
		if (ACPI_FAILURE(status))
			ACPI_EXCEPTION((AE_INFO, status,
					"Notifying BIOS of _CST ability failed"));
	}
}

示例#3

int __cpuinit acpi_processor_power_init(struct acpi_processor *pr,
			      struct acpi_device *device)
{
	acpi_status status = 0;
	static int first_run;
#ifdef CONFIG_ACPI_PROCFS
	struct proc_dir_entry *entry = NULL;
#endif

	if (boot_option_idle_override)
		return 0;

	if (!first_run) {
		if (idle_halt) {
			/*
			 * When the boot option of "idle=halt" is added, halt
			 * is used for CPU IDLE.
			 * In such case C2/C3 is meaningless. So the max_cstate
			 * is set to one.
			 */
			max_cstate = 1;
		}
		dmi_check_system(processor_power_dmi_table);
		max_cstate = acpi_processor_cstate_check(max_cstate);
		if (max_cstate < ACPI_C_STATES_MAX)
			printk(KERN_NOTICE
			       "ACPI: processor limited to max C-state %d\n",
			       max_cstate);
		first_run++;
	}

	if (!pr)
		return -EINVAL;

	if (acpi_gbl_FADT.cst_control && !nocst) {
		status =
		    acpi_os_write_port(acpi_gbl_FADT.smi_command, acpi_gbl_FADT.cst_control, 8);
		if (ACPI_FAILURE(status)) {
			ACPI_EXCEPTION((AE_INFO, status,
					"Notifying BIOS of _CST ability failed"));
		}
	}

	acpi_processor_get_power_info(pr);
	pr->flags.power_setup_done = 1;

	/*
	 * Install the idle handler if processor power management is supported.
	 * Note that we use previously set idle handler will be used on
	 * platforms that only support C1.
	 */
	if (pr->flags.power) {
		acpi_processor_setup_cpuidle(pr);
		if (cpuidle_register_device(&pr->power.dev))
			return -EIO;
	}
#ifdef CONFIG_ACPI_PROCFS
	/* 'power' [R] */
	entry = proc_create_data(ACPI_PROCESSOR_FILE_POWER,
				 S_IRUGO, acpi_device_dir(device),
				 &acpi_processor_power_fops,
				 acpi_driver_data(device));
	if (!entry)
		return -EIO;
#endif
	return 0;
}