C++ ACPI_SERIAL_BEGIN函數代碼示例

static int
acpi_cpu_global_cx_lowest_sysctl(SYSCTL_HANDLER_ARGS)
{
    struct	acpi_cpu_softc *sc;
    char	state[8];
    int		val, error, i;

    snprintf(state, sizeof(state), "C%d", cpu_cx_lowest + 1);
    error = sysctl_handle_string(oidp, state, sizeof(state), req);
    if (error != 0 || req->newptr == NULL)
	return (error);
    if (strlen(state) < 2 || toupper(state[0]) != 'C')
	return (EINVAL);
    val = (int) strtol(state + 1, NULL, 10) - 1;
    if (val < 0 || val > cpu_cx_count - 1)
	return (EINVAL);
    cpu_cx_lowest = val;

    /* Update the new lowest useable Cx state for all CPUs. */
    ACPI_SERIAL_BEGIN(cpu);
    for (i = 0; i < cpu_ndevices; i++) {
	sc = device_get_softc(cpu_devices[i]);
	acpi_cpu_set_cx_lowest(sc, val);
    }
    ACPI_SERIAL_END(cpu);

    return (0);
}

static int
acpi_cmbat_bif(device_t dev, struct acpi_bif *bifp)
{
    struct acpi_cmbat_softc *sc;

    sc = device_get_softc(dev);

    /*
     * Just copy the data.  The only value that should change is the
     * last-full capacity, so we only update when we get a notify that says
     * the info has changed.  Many systems apparently take a long time to
     * process a _BIF call so we avoid it if possible.
     */
    ACPI_SERIAL_BEGIN(cmbat);
    bifp->units = sc->bif.units;
    bifp->dcap = sc->bif.dcap;
    bifp->lfcap = sc->bif.lfcap;
    bifp->btech = sc->bif.btech;
    bifp->dvol = sc->bif.dvol;
    bifp->wcap = sc->bif.wcap;
    bifp->lcap = sc->bif.lcap;
    bifp->gra1 = sc->bif.gra1;
    bifp->gra2 = sc->bif.gra2;
    strncpy(bifp->model, sc->bif.model, sizeof(sc->bif.model));
    strncpy(bifp->serial, sc->bif.serial, sizeof(sc->bif.serial));
    strncpy(bifp->type, sc->bif.type, sizeof(sc->bif.type));
    strncpy(bifp->oeminfo, sc->bif.oeminfo, sizeof(sc->bif.oeminfo));
    ACPI_SERIAL_END(cmbat);

    return (0);
}

static int
acpi_fujitsu_sysctl(SYSCTL_HANDLER_ARGS)
{
	struct acpi_fujitsu_softc	*sc;
	int				method;
	int				arg;
	int				function_num, error = 0;

	sc = (struct acpi_fujitsu_softc *)oidp->oid_arg1;
	function_num = oidp->oid_arg2;
	method = sysctl_table[function_num].method;

	ACPI_SERIAL_BEGIN(fujitsu);

	/* Get the current value */
	arg = acpi_fujitsu_method_get(sc, method);
	error = sysctl_handle_int(oidp, &arg, 0, req);

	if (error != 0 || req->newptr == NULL)
		goto out;

	/* Update the value */
	error = acpi_fujitsu_method_set(sc, method, arg);

out:
	ACPI_SERIAL_END(fujitsu);
	return (error);
}

static int
acpi_panasonic_sysctl(SYSCTL_HANDLER_ARGS)
{
	struct acpi_panasonic_softc *sc;
	UINT32 arg;
	int function, error;
	hkey_fn_t *handler;

	sc = (struct acpi_panasonic_softc *)oidp->oid_arg1;
	function = oidp->oid_arg2;
	handler = sysctl_table[function].handler;

	/* Get the current value from the appropriate function. */
	ACPI_SERIAL_BEGIN(panasonic);
	error = handler(sc->handle, HKEY_GET, &arg);
	if (error != 0)
		goto out;

	/* Send the current value to the user and return if no new value. */
	error = sysctl_handle_int(oidp, &arg, 0, req);
	if (error != 0 || req->newptr == NULL)
		goto out;

	/* Set the new value via the appropriate function. */
	error = handler(sc->handle, HKEY_SET, &arg);

out:
	ACPI_SERIAL_END(panasonic);
	return (error);
}

static int
acpi_pci_link_resume(device_t dev)
{
	struct acpi_pci_link_softc *sc;
	ACPI_STATUS status;
	int i, routed;

	/*
	 * If all of our links are routed, then restore the link via _SRS,
	 * otherwise, disable the link via _DIS.
	 */
	ACPI_SERIAL_BEGIN(pci_link);
	sc = device_get_softc(dev);
	routed = 0;
	for (i = 0; i < sc->pl_num_links; i++)
		if (sc->pl_links[i].l_routed)
			routed++;
	if (routed == sc->pl_num_links)
		status = acpi_pci_link_route_irqs(dev);
	else {
		AcpiEvaluateObject(acpi_get_handle(dev), "_DIS", NULL, NULL);
		status = AE_OK;
	}
	ACPI_SERIAL_END(pci_link);
	if (ACPI_FAILURE(status))
		return (ENXIO);
	else
		return (0);
}

static void
acpi_acad_get_status(void *context)
{
    struct acpi_acad_softc *sc;
    device_t	dev;
    ACPI_HANDLE	h;
    int		newstatus;

    dev = context;
    sc = device_get_softc(dev);
    h = acpi_get_handle(dev);
    newstatus = -1;
    acpi_GetInteger(h, "_PSR", &newstatus);

    /* If status is valid and has changed, notify the system. */
    ACPI_SERIAL_BEGIN(acad);
    if (newstatus != -1 && sc->status != newstatus) {
	sc->status = newstatus;
	power_profile_set_state(newstatus ? POWER_PROFILE_PERFORMANCE :
	    POWER_PROFILE_ECONOMY);
	ACPI_VPRINT(dev, acpi_device_get_parent_softc(dev),
	    "%s Line\n", newstatus ? "On" : "Off");
	acpi_UserNotify("ACAD", h, newstatus);
    }
    ACPI_SERIAL_END(acad);
}

/* XXX There should be a cleaner way to do this locking. */
static void
acpi_cmbat_get_bif_task(void *arg)
{

    ACPI_SERIAL_BEGIN(cmbat);
    acpi_cmbat_get_bif(arg);
    ACPI_SERIAL_END(cmbat);
}

static void
acpi_cmbat_init_battery(void *arg)
{
    struct acpi_cmbat_softc *sc;
    int		retry, valid;
    device_t	dev;

    dev = (device_t)arg;
    sc = device_get_softc(dev);
    ACPI_VPRINT(dev, acpi_device_get_parent_softc(dev),
		"battery initialization start\n");

    /*
     * Try repeatedly to get valid data from the battery.  Since the
     * embedded controller isn't always ready just after boot, we may have
     * to wait a while.
     */
    for (retry = 0; retry < ACPI_CMBAT_RETRY_MAX; retry++, AcpiOsSleep(10000)) {
	/* batteries on DOCK can be ejected w/ DOCK during retrying */
	if (!device_is_attached(dev))
	    return;

	if (!acpi_BatteryIsPresent(dev))
	    continue;

	/*
	 * Only query the battery if this is the first try or the specific
	 * type of info is still invalid.
	 */
	ACPI_SERIAL_BEGIN(cmbat);
	if (retry == 0 || !acpi_battery_bst_valid(&sc->bst)) {
	    timespecclear(&sc->bst_lastupdated);
	    acpi_cmbat_get_bst(dev);
	}
	if (retry == 0 || !acpi_battery_bif_valid(&sc->bif))
	    acpi_cmbat_get_bif(dev);

	valid = acpi_battery_bst_valid(&sc->bst) &&
	    acpi_battery_bif_valid(&sc->bif);
	ACPI_SERIAL_END(cmbat);

	if (valid)
	    break;
    }

    if (retry == ACPI_CMBAT_RETRY_MAX) {
	ACPI_VPRINT(dev, acpi_device_get_parent_softc(dev),
		    "battery initialization failed, giving up\n");
    } else {
	ACPI_VPRINT(dev, acpi_device_get_parent_softc(dev),
		    "battery initialization done, tried %d times\n", retry + 1);
    }
}

int
acpi_battery_register(device_t dev)
{
    int error;

    error = 0;
    ACPI_SERIAL_BEGIN(battery);
    if (!acpi_batteries_initted)
	error = acpi_battery_init();
    ACPI_SERIAL_END(battery);
    return (error);
}

static void
acpi_panasonic_power_profile(void *arg)
{
	ACPI_HANDLE handle;
	UINT32 brightness;

	handle = (ACPI_HANDLE)arg;

	/* Reset current brightness according to new power state. */
	ACPI_SERIAL_BEGIN(panasonic);
	hkey_lcd_brightness(handle, HKEY_GET, &brightness);
	hkey_lcd_brightness(handle, HKEY_SET, &brightness);
	ACPI_SERIAL_END(panasonic);
}

static int
acpi_dock_attach(device_t dev)
{
	struct acpi_dock_softc *sc;
	ACPI_HANDLE	h;

	sc = device_get_softc(dev);
	h = acpi_get_handle(dev);
	if (sc == NULL || h == NULL)
		return (ENXIO);

	sc->status = ACPI_DOCK_STATUS_UNKNOWN;

	AcpiEvaluateObject(h, "_INI", NULL, NULL);

	ACPI_SERIAL_BEGIN(dock);

	acpi_dock_device_check(dev);

	/* Get the sysctl tree */
	sc->sysctl_ctx = device_get_sysctl_ctx(dev);
	sc->sysctl_tree = device_get_sysctl_tree(dev);

	SYSCTL_ADD_INT(sc->sysctl_ctx,
		SYSCTL_CHILDREN(sc->sysctl_tree),
		OID_AUTO, "_sta", CTLFLAG_RD,
		&sc->_sta, 0, "Dock _STA");
	SYSCTL_ADD_INT(sc->sysctl_ctx,
		SYSCTL_CHILDREN(sc->sysctl_tree),
		OID_AUTO, "_bdn", CTLFLAG_RD,
		&sc->_bdn, 0, "Dock _BDN");
	SYSCTL_ADD_INT(sc->sysctl_ctx,
		SYSCTL_CHILDREN(sc->sysctl_tree),
		OID_AUTO, "_uid", CTLFLAG_RD,
		&sc->_uid, 0, "Dock _UID");
	SYSCTL_ADD_PROC(sc->sysctl_ctx,
		SYSCTL_CHILDREN(sc->sysctl_tree),
		OID_AUTO, "status",
		CTLTYPE_INT|CTLFLAG_RW, dev, 0,
		acpi_dock_status_sysctl, "I",
		"Dock/Undock operation");

	ACPI_SERIAL_END(dock);

	AcpiInstallNotifyHandler(h, ACPI_ALL_NOTIFY,
				 acpi_dock_notify_handler, dev);

	return (0);
}

static ACPI_STATUS
EcLock(struct acpi_ec_softc *sc)
{
    ACPI_STATUS	status;

    ACPI_SERIAL_BEGIN(ec);
    /* If _GLK is non-zero, acquire the global lock. */
    status = AE_OK;
    if (sc->ec_glk) {
	status = AcpiAcquireGlobalLock(EC_LOCK_TIMEOUT, &sc->ec_glkhandle);
	if (ACPI_FAILURE(status))
	    ACPI_SERIAL_END(ec);
    }
    return (status);
}

static void
acpi_fujitsu_notify_status_changed(void *arg)
{
	struct acpi_fujitsu_softc *sc;

	ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__);

	sc = (struct acpi_fujitsu_softc *)arg;

	/*
	 * Since our notify function is called, we know something has
	 * happened.  So the only reason for acpi_fujitsu_update to fail
	 * is if we can't find what has changed or an error occurs.
	 */
	ACPI_SERIAL_BEGIN(fujitsu);
	acpi_fujitsu_update(sc);
	ACPI_SERIAL_END(fujitsu);
}

/*
 * PCI power manangement
 */
static int
acpi_pci_set_powerstate_method(device_t dev, device_t child, int state)
{
	ACPI_HANDLE h;
	ACPI_STATUS status;
	int old_state, error;

	error = 0;
	if (state < ACPI_STATE_D0 || state > ACPI_STATE_D3)
		return (EINVAL);

	/*
	 * We set the state using PCI Power Management outside of setting
	 * the ACPI state.  This means that when powering down a device, we
	 * first shut it down using PCI, and then using ACPI, which lets ACPI
	 * try to power down any Power Resources that are now no longer used.
	 * When powering up a device, we let ACPI set the state first so that
	 * it can enable any needed Power Resources before changing the PCI
	 * power state.
	 */
	ACPI_SERIAL_BEGIN(pci_powerstate);
	old_state = pci_get_powerstate(child);
	if (old_state < state && pci_do_power_suspend) {
		error = pci_set_powerstate_method(dev, child, state);
		if (error)
			goto out;
	}
	h = acpi_get_handle(child);
	status = acpi_pwr_switch_consumer(h, state);
	if (ACPI_SUCCESS(status)) {
		if (bootverbose)
			device_printf(dev, "set ACPI power state D%d on %s\n",
			    state, acpi_name(h));
	} else if (status != AE_NOT_FOUND)
		device_printf(dev,
		    "failed to set ACPI power state D%d on %s: %s\n",
		    state, acpi_name(h), AcpiFormatException(status));
	if (old_state > state && pci_do_power_resume)
		error = pci_set_powerstate_method(dev, child, state);

out:
	ACPI_SERIAL_END(pci_powerstate);
	return (error);
}

static int
acpi_dock_status_sysctl(SYSCTL_HANDLER_ARGS)
{
	struct acpi_dock_softc *sc;
	device_t	dev;
	int		status, err;

	err = 0;
	dev = (device_t)arg1;

	sc = device_get_softc(dev);
	status = sc->status;

	ACPI_SERIAL_BEGIN(dock);
	err = sysctl_handle_int(oidp, &status, 0, req);
	if (err != 0 || req->newptr == NULL)
		goto out;

	if (status != ACPI_DOCK_STATUS_UNDOCKED &&
	    status != ACPI_DOCK_STATUS_DOCKED) {
		err = EINVAL;
		goto out;
	}

	if (status == sc->status)
		goto out;

	switch (status) {
	case ACPI_DOCK_STATUS_UNDOCKED:
		acpi_dock_removal(dev);
		break;
	case ACPI_DOCK_STATUS_DOCKED:
		acpi_dock_device_check(dev);
		break;
	default:
		err = EINVAL;
		break;
	}
out:
	ACPI_SERIAL_END(dock);
	return (err);
}