EFI_GCD_IO_SPACE_DESCRIPTOR Struct Reference


Data Fields

EFI_PHYSICAL_ADDRESS BaseAddress
UINT64 Length
EFI_GCD_IO_TYPE GcdIoType
EFI_HANDLE ImageHandle
EFI_HANDLE DeviceHandle

Detailed Description

EFI_GCD_IO_SPACE_DESCRIPTOR.

Field Documentation

Physical address of the first byte in the I/O region. Type EFI_PHYSICAL_ADDRESS is defined in the AllocatePages() function description in the UEFI 2.0 specification.

The device handle for which the I/O resource has been allocated. If ImageHandle is NULL, then the I/O resource is not currently allocated. If this field is NULL, then the I/O resource is not associated with a device that is described by a device handle. Type EFI_HANDLE is defined in InstallProtocolInterface() in the UEFI 2.0 specification.

Type of the I/O region. Type EFI_GCD_IO_TYPE is defined in the AddIoSpace() function description.

The image handle of the agent that allocated the I/O resource described by PhysicalStart and NumberOfBytes. If this field is NULL, then the I/O resource is not currently allocated. Type EFI_HANDLE is defined in InstallProtocolInterface() in the UEFI 2.0 specification.

Number of bytes in the I/O region.


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