DragonFlyBSD

/* Get our Processor object. */

buf.Pointer = NULL;

buf.Length = ACPI_ALLOCATE_BUFFER;

status = AcpiEvaluateObject(handle, NULL, NULL, &buf);

if (ACPI_FAILURE(status)) {

device_printf(dev, "probe failed to get Processor obj - %s\n",

AcpiOsFree(obj);

return (ENXIO);

}

/*

* Find the processor associated with our unit. We could use the

if (acpi_pcpu_get_id(device_get_unit(dev), &acpi_id, &cpu_id) != 0)

return (ENXIO);

/*

* Check if we already probed this processor. We scan the bus twice

* so it's possible we've already seen this one.

buf.Pointer = NULL;

buf.Length = ACPI_ALLOCATE_BUFFER;

status = AcpiEvaluateObject(handle, "_CST", NULL, &buf);

if (ACPI_SUCCESS(status)) {

obj = (ACPI_OBJECT *)buf.Pointer;

if (ACPI_PKG_VALID(obj, 2))

sc->cpu_handle = acpi_get_handle(dev);

cpu_softc[acpi_get_magic(dev)] = sc;

buf.Pointer = NULL;

buf.Length = ACPI_ALLOCATE_BUFFER;

status = AcpiEvaluateObject(sc->cpu_handle, NULL, NULL, &buf);

SYSCTL_CHILDREN(acpi_sc->acpi_sysctl_tree),

OID_AUTO, "cpu", CTLFLAG_RD, 0, "");

/* If this is the first device probed, check for quirks. */

if (device_get_unit(dev) == 0)

acpi_cpu_quirks(sc);

* Probe for throttling and Cx state support.

* If none of these is present, free up unused resources.

*/

thr_ret = acpi_cpu_throttle_probe(sc);

cx_ret = acpi_cpu_cx_probe(sc);

if (thr_ret == 0 || cx_ret == 0) {

status = AcpiInstallNotifyHandler(sc->cpu_handle, ACPI_DEVICE_NOTIFY,

acpi_cpu_notify, sc);

if (device_get_unit(dev) == 0)

AcpiOsExecute(OSL_NOTIFY_HANDLER, acpi_cpu_startup, NULL);

} else {