static int acpi_processor_get_power_info(struct acpi_processor *pr) { unsigned int i; int result; memset(pr->power.states, 0, sizeof(pr->power.states)); result = acpi_processor_get_power_info_cst(pr); if (result == -ENODEV) result = acpi_processor_get_power_info_fadt(pr); if (result) return result; acpi_processor_get_power_info_default(pr); pr->power.count = acpi_processor_power_verify(pr); for (i = 1; i < ACPI_PROCESSOR_MAX_POWER; i++) { if (pr->power.states[i].valid) { pr->power.count = i; if (pr->power.states[i].type >= ACPI_STATE_C2) pr->flags.power = 1; } } return 0; }
static int acpi_processor_get_cstate_info(struct acpi_processor *pr) { unsigned int i; int result; /* NOTE: the idle thread may not be running while calling * this function */ /* Zero initialize all the C-states info. */ memset(pr->power.states, 0, sizeof(pr->power.states)); result = acpi_processor_get_power_info_cst(pr); if (result == -ENODEV) result = acpi_processor_get_power_info_fadt(pr); if (result) return result; acpi_processor_get_power_info_default(pr); pr->power.count = acpi_processor_power_verify(pr); /* * if one state of type C2 or C3 is available, mark this * CPU as being "idle manageable" */ for (i = 1; i < ACPI_PROCESSOR_MAX_POWER; i++) { if (pr->power.states[i].valid) { pr->power.count = i; if (pr->power.states[i].type >= ACPI_STATE_C2) pr->flags.power = 1; } } return 0; }