Intel Extensible Firmware Interface - Manual (Page 162)

Extensible Firmware Interface Specification
5-64 12/01/02 Version 1.10
Examples
//
// Connect All Handles Example
//
The following example recusively connects all controllers in a platform.
//
EFI_STATUS Status;
EFI_BOOT_SERVICES_TABLE *gBS;
UINTN HandleCount;
EFI_HANDLE *HandleBuffer;
UINTN HandleIndex;
//
// Retrieve the list of all handles from the handle database
//
Status = gBS->LocateHandleBuffer (
AllHandles,
NULL,
NULL,
&HandleCount,
&HandleBuffer
);
if (!EFI_ERROR (Status)) {
for (HandleIndex = 0; HandleIndex < HandleCount; HandleIndex++) {
Status = gBS->ConnectController (
HandleBuffer[HandleIndex],
NULL,
NULL,
TRUE
);
}
gBS->FreePool(HandleBuffer);
}
//
// Connect Device Path Example
//
The following example walks the device path nodes of a device path, and
// connects only the drivers required to force a handle with that device path
// to be present in the handle database. This algorithms guarantees that
// only the minimum number of devices and drivers are initialized.
//
EFI_STATUS Status;
EFI_DEVICE_PATH_PROTOCOL *DevicePath;
EFI_DEVICE_PATH_PROTOCOL *RemainingDevicePath;
EFI_HANDLE Handle;