Intel Extensible Firmware Interface - Manual (Page 282)

Extensible Firmware Interface Specification
9-40 12/01/02 Version 1.10
EFI_DRIVER_CONFIGURATION_PROTOCOL.ForceDefaults()
Summary
Forces a driver to set the default configuration options for a controller.
Prototype
typedef
EFI_STATUS
(EFIAPI *EFI_DRIVER_CONFIGURATION_FORCE_DEFAULTS) (
IN EFI_DRIVER_CONFIGURATION_PROTOCOL
*This,
IN EFI_HANDLE ControllerHandle,
IN EFI_HANDLE ChildHandle OPTIONAL,
IN UINT32 DefaultType,
OUT EFI_DRIVER_CONFIGURATION_ACTION_REQUIRED *ActionRequired
);
Parameters
This A pointer to the EFI_DRIVER_CONFIGURATION_
PROTOCOL instance.
ControllerHandle The handle of the controller to force default configuration
options on.
ChildHandle The handle of the child controller to force default configuration
options on. This is an optional parameter that may be
NULL . It
will be NULL for device drivers. It will also be NULL for a bus
drivers that wish to force default configuration options for the
bus controller. It will not be
NULL for a bus driver that wishes
to force default configuration options for one of its child
controllers.
DefaultType The type of default configuration options to force on the
controller specified by
ControllerHandle and
ChildHandle . See Table 9-1 for legal values. A
DefaultType of 0x00000000 must be supported by this
protocol.
ActionRequired A pointer to the action that the calling agent is required to
perform when this function returns. See “Related Definitions” in
the
SetOptions() function description for a list of the actions
that the calling agent is required to perform prior to accessing
ControllerHandle again.