Intel Extensible Firmware Interface - Manual (Page 505)

Protocols — PCI Bus Support
Version 1.10 12/01/02 12-87
Related Definitions
//*******************************************************
// EFI_PCI_IO_PROTOCOL_ATTRIBUTE_OPERATION
//*******************************************************
typedef enum {
EfiPciIoAttributeOperationGet,
EfiPciIoAttributeOperationSet,
EfiPciIoAttributeOperationEnable,
EfiPciIoAttributeOperationDisable,
EfiPciIoAttributeOperationSupported,
EfiPciIoAttributeOperationMaximum
} EFI_PCI_IO_PROTOCOL_ATTRIBUTE_OPERATION;
EfiPciIoAttributeOperationGet
Retrieve the PCI controller’s current attributes, and return them in Result . If Result
is NULL , then EFI_INVALID_PARAMER is returned. For this operation,
Attributes is ignored.
EfiPciIoAttributeOperationSet
Set the PCI controller’s current attributes to Attributes . If a bit is set in
Attributes that is not supported by this PCI controller or one of its parent bridges,
then EFI_UNSUPPORTED is returned. For this operation, Result is an optional
parameter that may be NULL .
EfiPciIoAttributeOperationEnable
Enable the attributes specified by the bits that are set in Attributes for this PCI
controller. Bits in Attributes that are clear are ignored. If a bit is set in
Attributes that is not supported by this PCI controller or one of its parent bridges,
then EFI_UNSUPPORTED is returned. For this operation, Result is an optional
parameter that may be NULL .
EfiPciIoAttributeOperationDisable
Disable the attributes specified by the bits that are set in Attributes for this PCI
controller. Bits in Attributes that are clear are ignored. If a bit is set in
Attributes that is not supported by this PCI controller or one of its parent bridges,
then EFI_UNSUPPORTED is returned. For this operation, Result is an optional
parameter that may be NULL .
EfiPciIoAttributeOperationSupported
Retrieve the PCI controller's supported attributes, and return them in Result . If
Result is NULL , then EFI_INVALID_PARAMER is returned. For this operation,
Attributes is ignored.