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Version 1.10 12/01/02 K-17
Table K-1. Functions Listed in Alphabetic Order (continued)
Function Name Service or Protocol Subservice Function Description
UnloadImage Boot Services Image Services Unloads an image.
UnloadImage EFI Byte Code
Protocol
Called when an EBC image is
unloaded to allow the interpreter to
perform any cleanup associated
with the image’s execution.
Unmap Device I/O Protocol Releases any resources allocated
by Map()
.
Unmap PCI I/O Protocol Releases any resources allocated
by Map()
.
Unmap PCI Root Bridge I/O
Protocol
Releases any resources allocated
by Map()
.
UpdateBootObject
Authorization
Boot Integrity
Services Protocol
Requests that the configuration
parameters be altered by installing
or removing an authorization
certificate or changing the setting
of the check flag.
UsbAsyncInterruptTransfer USB I/O Protocol Nonblock USB interrupt transfer.
UsbAsyncIsochronous
Transfer
USB I/O Protocol Nonblock USB isochronous
transfer.
UsbBulkTransfer USB I/O Protocol Accesses the USB Device through
USB Bulk Transfer Pipe.
UsbControlTransfer USB I/O Protocol Accesses the USB Device through
USB Control Transfer Pipe.
UsbGetConfigDescriptor USB I/O Protocol Retrieves the activated
configuration descriptor of a USB
device.
UsbGetDeviceDescriptor USB I/O Protocol Retrieves the device descriptor of
a USB device.
UsbGetEndpointDescriptor USB I/O Protocol Retrieves the endpoint descriptor
of a USB Controller.
UsbGetInterfaceDescriptor USB I/O Protocol Retrieves the interface descriptor
of a USB Controller.
UsbGetStringDescriptor USB I/O Protocol Retrieves the string descriptor
inside a USB Device.
UsbGetSupported
Languages
USB I/O Protocol Retrieves the array of languages
that the USB device supports.
UsbIsochronousTransfer USB I/O Protocol Accesses the USB Device through
USB Isochronous Transfer Pipe.
continued