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Extensible Firmware Interface Specification
12-56 12/01/02 Version 1.10
EFI_PCI_IO_PROTOCOL
Summary
Provides the basic Memory, I/O, PCI configuration, and DMA interfaces that a driver uses to access
its PCI controller.
GUID
#define EFI_PCI_IO_PROTOCOL_GUID \
{0x4cf5b200,0x68b8,0x4ca5,0x9e,0xec,0xb2,0x3e,0x3f,0x50,0x2,0x9a}
Protocol Interface Structure
typedef struct _EFI_PCI_IO_PROTOCOL {
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;
} EFI_PCI_IO_PROTOCOL;
Parameters
PollMem Polls an address in PCI memory space until an exit condition is
met, or a timeout occurs. See the PollMem()
function
description.
PollIo Polls an address in PCI I/O space until an exit condition is met, or
a timeout occurs. See the PollIo()
function description.
Mem.Read Allows BAR relative reads to PCI memory space. See the
Mem.Read()
function description.
Mem.Write Allows BAR relative writes to PCI memory space. See the
Mem.Write()
function description.