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Extensible Firmware Interface Specification
K-6 12/01/02 Version 1.10
Table K-1. Functions Listed in Alphabetic Order (continued)
Function Name Service or Protocol
Subservice Function Description
GetDriverPath EFI Driver Override
Protocol
Retrieves the device path of the
platform override driver for a
controller in the system.
GetInfo Decompress
Protocol
Given the compressed source
buffer, this function retrieves the
size of the uncompressed
destination buffer and the size of
the scratch buffer required to
perform the decompression.
GetInfo File System Protocol
Gets the requested file or volume
information.
GetLocation PCI I/O Protocol Retrieves this PCI controller’s
current PCI bus number, device
number, and function number.
GetMaximumProcessor
Index
Debug Support
Protocol
Returns the maximum processor
index value that may be used with
RegisterPeriodicCallback()
and
RegisterExceptionCallback()
GetMemoryMap Boot Services Memory Allocation
Services
Returns the current boot services
memory map and memory
map key.
GetMode UGA Draw Protocol Return the current frame buffer
geometry and display refresh rate.
GetNextDevice SCSI Passthru
Protocol
Used to retrieve the list of legal
Target IDs for the SCSI devices
on a SCSI channel.
GetNextHighMonotonicCount Runtime Services Miscellaneous
Services
Returns the next high 32 bits of a
platform's monotonic counter.
GetNextMonotonicCount Boot Services Miscellaneous
Services
Returns a monotonically
increasing count for the platform.
GetNextVariableName Runtime Services Variable Services Enumerates the current variable
names.
GetPosition File System Protocol
Returns the current file position.
GetRootHubPortNumber USB Host Controller
Protocol
Retrieves the number of root hub
ports that are produced by the
USB host controller.
GetRootHubPortStatus USB Host Controller
Protocol
Retrieves the status of the
specified root hub port.
continued