_EFI_PCI_IO_PROTOCOL Struct Reference


Data Fields

EFI_PCI_IO_PROTOCOL_POLL_IO_MEM PollMem
EFI_PCI_IO_PROTOCOL_POLL_IO_MEM PollIo
EFI_PCI_IO_PROTOCOL_ACCESS Mem
EFI_PCI_IO_PROTOCOL_ACCESS Io
EFI_PCI_IO_PROTOCOL_CONFIG_ACCESS Pci
EFI_PCI_IO_PROTOCOL_COPY_MEM CopyMem
EFI_PCI_IO_PROTOCOL_MAP Map
EFI_PCI_IO_PROTOCOL_UNMAP Unmap
EFI_PCI_IO_PROTOCOL_ALLOCATE_BUFFER AllocateBuffer
EFI_PCI_IO_PROTOCOL_FREE_BUFFER FreeBuffer
EFI_PCI_IO_PROTOCOL_FLUSH Flush
EFI_PCI_IO_PROTOCOL_GET_LOCATION GetLocation
EFI_PCI_IO_PROTOCOL_ATTRIBUTES Attributes
EFI_PCI_IO_PROTOCOL_GET_BAR_ATTRIBUTES GetBarAttributes
EFI_PCI_IO_PROTOCOL_SET_BAR_ATTRIBUTES SetBarAttributes
UINT64 RomSize
VOID * RomImage

Detailed Description

The EFI_PCI_IO_PROTOCOL provides the basic Memory, I/O, PCI configuration, and DMA interfaces used to abstract accesses to PCI controllers. There is one EFI_PCI_IO_PROTOCOL instance for each PCI controller on a PCI bus. A device driver that wishes to manage a PCI controller in a system will have to retrieve the EFI_PCI_IO_PROTOCOL instance that is associated with the PCI controller.

Field Documentation

A pointer to the in memory copy of the ROM image. The PCI Bus Driver is responsible for allocating memory for the ROM image, and copying the contents of the ROM to memory. The contents of this buffer are either from the PCI option ROM that can be accessed through the ROM BAR of the PCI controller, or it is from a platform-specific location. The Attributes() function can be used to determine from which of these two sources the RomImage buffer was initialized.

The size, in bytes, of the ROM image.


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