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Extensible Firmware Interface Specification
12-8 12/01/02 Version 1.10
12.2 PCI Root Bridge I/O Protocol
This section provides detailed information on the PCI Root Bridge I/O Protocol and its functions.
EFI_PCI_ROOT_BRIDGE_IO_PROTOCOL
Summary
Provides the basic Memory, I/O, PCI configuration, and DMA interfaces that are used to abstract
accesses to PCI controllers behind a PCI Root Bridge Controller.
GUID
#define EFI_PCI_ROOT_BRIDGE_IO_PROTOCOL_GUID \
{0x2F707EBB,0x4A1A,0x11d4,0x9A,0x38,0x00,0x90,0x27,0x3F,0xC1,0x4D}
Protocol Interface Structure
typedef struct _EFI_PCI_ROOT_BRIDGE_IO_PROTOCOL {
EFI_HANDLE ParentHandle;
EFI_PCI_ROOT_BRIDGE_IO_PROTOCOL_POLL_IO_MEM PollMem;
EFI_PCI_ROOT_BRIDGE_IO_PROTOCOL_POLL_IO_MEM PollIo;
EFI_PCI_ROOT_BRIDGE_IO_PROTOCOL_ACCESS Mem;
EFI_PCI_ROOT_BRIDGE_IO_PROTOCOL_ACCESS Io;
EFI_PCI_ROOT_BRIDGE_IO_PROTOCOL_ACCESS Pci;
EFI_PCI_ROOT_BRIDGE_IO_PROTOCOL_COPY_MEM CopyMem;
EFI_PCI_ROOT_BRIDGE_IO_PROTOCOL_MAP Map;
EFI_PCI_ROOT_BRIDGE_IO_PROTOCOL_UNMAP Unmap;
EFI_PCI_ROOT_BRIDGE_IO_PROTOCOL_ALLOCATE_BUFFER AllocateBuffer;
EFI_PCI_ROOT_BRIDGE_IO_PROTOCOL_FREE_BUFFER FreeBuffer;
EFI_PCI_ROOT_BRIDGE_IO_PROTOCOL_FLUSH Flush;
EFI_PCI_ROOT_BRIDGE_IO_PROTOCOL_GET_ATTRIBUTES GetAttributes;
EFI_PCI_ROOT_BRIDGE_IO_PROTOCOL_SET_ATTRIBUTES SetAttributes;
EFI_PCI_ROOT_BRIDGE_IO_PROTOCOL_CONFIGURATION Configuration;
UINT32 SegmentNumber;
} EFI_PCI_ROOT_BRIDGE_IO_PROTOCOL;
Parameters
ParentHandle The EFI_HANDLE of the PCI Host Bridge of which this PCI Root
Bridge is a member.
PollMem Polls an address in memory mapped I/O space until an exit
condition is met, or a timeout occurs. See the PollMem()
function description.
PollIo Polls an address in I/O space until an exit condition is met, or a
timeout occurs. See the PollIo()
function description.