Intel Extensible Firmware Interface, Specification

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Extensible Firmware Interface Specification
406 12/12/00 Version 1.02
G.3.4.6 PXE_IFNUM
typedef PXE_UINT16 PXE_IFNUM;
// This interface number must be passed to the S/W UNDI Start
// command.
#define PXE_IFNUM_START 0x0000
// This interface number is returned by the S/W UNDI Get State and
// Start commands if information in the CDB, CPB or DB is invalid.
#define PXE_IFNUM_INVALID 0x0000
G.3.4.7 PXE_CONTROL
typedef PXE_UINT16 PXE_CONTROL;
// Setting this flag directs the UNDI to queue this command for
// later execution if the UNDI is busy and it supports command
// queuing. If queuing is not supported, a
// PXE_STATCODE_INVALID_CONTROL error is returned. If the queue
// is full, a PXE_STATCODE_CDB_QUEUE_FULL error is returned.
#define PXE_CONTROL_QUEUE_IF_BUSY 0x0002
// These two bit values are used to determine if there are more
// UNDI CDB structures following this one. If the link bit is
// set, there must be a CDB structure following this one.
// Execution will start on the next CDB structure as soon as this
// one completes successfully. If an error is generated by this
// command, execution will stop.
#define PXE_CONTROL_LINK 0x0001
#define PXE_CONTROL_LAST_CDB_IN_LIST 0x0000