Intel Extensible Firmware Interface, Specification

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32/64-bit UNDI Specification
Version 1.02 12/12/00 427
#define PXE_MAX_TXRX_UNIT_ETHER 1500
#define PXE_HWADDR_LEN_ETHER 0x0006
#define PXE_DUPLEX_ENABLE_FULL_SUPPORTED 1
#define PXE_DUPLEX_FORCE_FULL_SUPPORTED 2
#define PXE_LOOPBACK_INTERNAL_SUPPORTED 1
#define PXE_LOOPBACK_EXTERNAL_SUPPORTED 2
G.4.6 Get Config Info
This command is used to retrieve configuration information about the NIC being controlled by the
UNDI.
G.4.6.1 Issuing the Command
To issue a Get Config Info command, create a CDB and fill it in as shows in the table below:
CDB Field How to initialize the CDB structure for a Get Config Info command
OpCode PXE_OPCODE_GET_CONFIG_INFO
OpFlags PXE_OPFLAGS_NOT_USED
CPBsize PXE_CPBSIZE_NOT_USED
DBsize sizeof(PXE_DB_CONFIG_INFO)
CPBaddr PXE_CPBADDR_NOT_USED
DBaddr
Address of a
PXE_DB_CONFIG_INFO
structure.
StatCode PXE_STATCODE_INITIALIZE
StatFlags PXE_STATFLAGS_INITIALIZE
IFnum
A valid interface number from zero to
!PXE.IFcnt
.
Control Set as needed.
G.4.6.2 Waiting for the Command to Execute
Monitor the upper two bits (14 & 15) in the
CDB.StatFlags
field. Until these bits change to
report
PXE_STATFLAGS_COMMAND_COMPLETE
or
PXE_STATFLAGS_COMMAND_FAILED
,
the command has not been executed by the UNDI.
StatFlags Reason
COMMAND_COMPLETE Command completed successfully. DB has been written.
COMMAND_FAILED Command failed. StatCode field contains error code.
COMMAND_QUEUED Command has been queued.
INITIALIZE Command has been not executed or queued.