Intel Extensible Firmware Interface Specification page 473

G.4.16.3 Checking Command Execution Results
After command execution completes, either successfully or not, the
contains the result of the command execution.
StatCode
SUCCESS
INVALID_CDB
BUSY
QUEUE_FULL
NOT_STARTED
NOT_INITIALIZED
StatFlags
If the command completes successfully and the
OpFlag was set in the CDB, the current interrupt status is returned in the
and any pending interrupts will have been cleared.
•
PXE_STATFLAGS_GET_STATUS_RECEIVE
•
PXE_STATFLAGS_GET_STATUS_TRANSMIT
•
PXE_STATFLAGS_GET_STATUS_COMMAND
•
PXE_STATFLAGS_GET_STATUS_SOFTWARE
The StatFlags above may not map directly to external interrupt signals. For example: Some NICs
may combine both the receive and transmit interrupts to one external interrupt line. When a receive
and/or transmit interrupt occurs, use the Get Status to determine which type(s) of interrupt(s)
occurred.
This flag is set if the transmitted buffer queue is empty. This flag will be set if all transmitted
buffer addresses get written t into the DB.
•
PXE_STATFLAGS_GET_STATUS_TXBUF_QUEUE_EMPTY
This flag is set if no transmitted buffer addresses were written into the DB.
•
PXE_STATFLAGS_GET_STATUS_NO_TXBUFS_WRITTEN
Version 1.02
Reason
Command completed successfully. StatFlags and/or DB are updated.
One of the CDB fields was not set correctly.
UNDI is already processing commands. Try again later.
Command queue is full. Try again later.
The UNDI is not started.
The UNDI is not initialized.
PXE_OPFLAGS_GET_INTERRUPT_STATUS
12/12/00
32/64-bit UNDI Specification
field
CDB.StatCode
field
CDB.StatFlags
455