Efi_driver_binding_protocol.supported(), Supported(), Abcsupported() – Intel Extensible Firmware Interface User Manual
Page 246
Extensible Firmware Interface Specification
9-4
12/01/02
Version 1.10
EFI_DRIVER_BINDING_PROTOCOL.Supported()
Summary
Tests to see if this driver supports a given controller. If a child device is provided, it further tests to
see if this driver supports creating a handle for the specified child device.
Prototype
typedef
EFI_STATUS
(EFIAPI *EFI_DRIVER_BINDING_PROTOCOL_SUPPORTED) (
IN EFI_DRIVER_BINDING_PROTOCOL
*This,
IN EFI_HANDLE
ControllerHandle,
IN EFI_DEVICE_PATH_PROTOCOL
*RemainingDevicePath OPTIONAL
);
Parameters
This
A pointer to the
instance.
ControllerHandle
The handle of the controller to test. This handle must support a
protocol interface that supplies an I/O abstraction to the driver.
Sometimes just the presence of this I/O abstraction is enough for
the driver to determine if it supports
ControllerHandle
.
Sometimes, the driver may use the services of the I/O abstraction
to determine if this driver supports
ControllerHandle
.
RemainingDevicePath
A pointer to the remaining portion of a device path. This
parameter is ignored by device drivers, and is optional for bus
drivers. For bus drivers, if this parameter is not
NULL
, then
the bus driver must determine if the bus controller specified
by
ControllerHandle
and the child controller specified
by
RemainingDevicePath
are both supported by this
bus driver.
Description
This function checks to see if the driver specified by
This
supports the device specified by
ControllerHandle
. Drivers will typically use the device path attached to
ControllerHandle
and/or the services from the bus I/O abstraction attached to
ControllerHandle
to determine if the driver supports
ControllerHandle
. This function
may be called many times during platform initialization. In order to reduce boot times, the tests
performed by this function must be very small, and take as little time as possible to execute. This
function must not change the state of any hardware devices, and this function must be aware that
the device specified by
ControllerHandle
may already be managed by the same driver or a
different driver. This function must match its calls to
with
with