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Extensible Firmware Interface Specification
12-80 12/01/02 Version 1.10
EFI_PCI_IO_PROTOCOL.Unmap()
Summary
Completes the Map() operation and releases any corresponding resources.
Prototype
typedef
EFI_STATUS
(EFIAPI *EFI_PCI_IO_PROTOCOL_UNMAP) (
IN EFI_PCI_IO_PROTOCOL *This,
IN VOID *Mapping
);
Parameters
This A pointer to the EFI_PCI_IO_PROTOCOL instance. Type
EFI_PCI_IO_PROTOCOL is defined in Section 12.4.
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 EfiPciIoOperationBusMasterWrite, 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
HostAddress is not a value that was returned by Map().
EFI_DEVICE_ERROR The data was not committed to the target system memory.