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Extensible Firmware Interface Specification
12-30 12/01/02 Version 1.10
EFI_PCI_ROOT_BRIDGE_IO_PROTOCOL.Unmap()
Summary
Completes the Map() operation and releases any corresponding resources.
Prototype
typedef
EFI_STATUS
(EFIAPI *EFI_PCI_ROOT_BRIDGE_IO_PROTOCOL_UNMAP) (
IN EFI_PCI_ROOT_BRIDGE_IO_PROTOCOL *This,
IN VOID *Mapping
);
Parameters
This A pointer to the EFI_PCI_ROOT_BRIDGE_IO_PROTOCOL.
Type EFI_PCI_ROOT_BRIDGE_IO_PROTOCOL is defined in
Section 12.2.
Mapping The mapping value returned from Map().
Description
The Unmap() function completes the Map() operation and releases any corresponding resources.
If the operation was an EfiPciOperationBusMasterWrite or
EfiPciOperationBusMasterWrite64, the data is committed to the target system memory.
Any resources used for the mapping are freed.
Status Codes Returned
EFI_SUCCESS The range was unmapped.
EFI_INVALID_PARAMETER
Mapping is not a value that was returned by Map().
EFI_DEVICE_ERROR The data was not committed to the target system memory.