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Extensible Firmware Interface Specification
K-8 12/01/02 Version 1.10
Table K-1. Functions Listed in Alphabetic Order (continued)
Function Name Service or Protocol
Subservice Function Description
InstallMultipleProtocol
Interfaces
Boot Services
Protocol Handler
Services
Installs one or more protocol
interfaces onto a handle.
InstallProtocolInterface Boot Services Protocol Handler
Services
Adds a protocol interface to an
existing or new device handle.
Interrupt Enables UNDI Commands The Interrupt Enables command
can be used to read and/or
change the current external
interrupt enable settings.
InvalidateInstructionCache Debug Support
Protocol
Invalidate the instruction cache of
the processor.
Io.Read Device I/O Protocol Reads from I/O ports on a bus.
Io.Read PCI I/O Protocol Allows BAR relative reads to PCI
I/O space.
Io.Read PCI Root Bridge I/O
Protocol
Allows reads from I/O space.
Io.Write Device I/O Protocol Writes to I/O ports on a bus.
Io.Write PCI I/O Protocol Allows BAR relative writes to PCI
I/O space.
Io.Write PCI Root Bridge I/O
Protocol
Allows writes to I/O space.
IsochronousTransfer USB Host Controller
Protocol
Submits isochronous transfer to
an isochronous endpoint of a USB
device.
LoadFile Load File Protocol Causes the driver to load the
requested file.
LoadImage Boot Services Image Services Function to dynamically load
another EFI Image.
LocateDevicePath Boot Services Protocol Handler
Services
Locates the closest handle that
supports the specified protocol on
the specified device path.
LocateHandle Boot Services Protocol Handler
Services
Locates the handle(s) that support
the specified protocol.
LocateHandleBuffer Boot Services Protocol Handler
Services
Retrieves the list of handles from
the handle database that meet the
search criteria. The return buffer
is automatically allocated.
LocateProtocol Boot Services Protocol Handler
Services
Finds the first handle in the handle
database the supports the
requested protocol.
continued