Intel Extensible Firmware Interface - Manual (Page 510)

Extensible Firmware Interface Specification
12-92 12/01/02 Version 1.10
EFI_PCI_IO_PROTOCOL.SetBarAttributes()
Summary
Sets the attributes for a range of a BAR on a PCI controller.
Prototype
typedef
EFI_STATUS
(EFIAPI *EFI_PCI_IO_PROTOCOL_SET_BAR_ATTRIBUTES) (
IN EFI_PCI_IO_PROTOCOL
*This,
IN UINT64 Attributes,
IN UINT8 BarIndex,
IN OUT UINT64 *Offset,
IN OUT UINT64 *Length
);
Parameters
This A pointer to the EFI_PCI_IO_PROTOCOL instance. Type
EFI_PCI_IO_PROTOCOL is defined in Section 12.4.
Attributes The mask of attributes to set for the resource range specified by
BarIndex , Offset , and Length .
BarIndex The BAR index of the standard PCI Configuration header to use as
the base address for the resource range. The legal range for this
field is 0..5.
Offset A pointer to the BAR relative base address of the resource range to
be modified by the attributes specified by
Attributes . On
return, *Offset will be set to the actual base address of the
resource range. Not all resources can be set to a byte boundary, so
the actual base address may differ from the one passed in by the
caller.
Length A pointer to the length of the resource range to be modified by the
attributes specified by
Attributes . On return, *Length will
be set to the actual length of the resource range. Not all resources
can be set to a byte boundary, so the actual length may differ from
the one passed in by the caller.