| Bit Index | Default | Access Type | Field | Description |
|---|---|---|---|---|
| [31:12] | 0 | NA | Reserved | Reserved |
| [11:4] | 0 | RO | cur_src_fn | This field is for PF use only. The source function number of the message on the top of the incoming request queue. |
| [2] | 0 | RO | ack_status | This field is for PF use only. The status bit will be set when any bit in the acknowledgement status register is asserted. |
| [1] | 0 | RO | o_msg_status | For VF: The status bit will be set when VF driver
write msg_send to its command register. When the associated PF
driver sends acknowledgement to this VF, the hardware clears this
field. The VF driver is not allow to update any content in its
outgoing mailbox memory (OMM) while o_msg_status is asserted. Any
illegal writes to the OMM are discarded (optionally, case an error
in the AXI4-Lite response channel). For PF: The field indicated the message status of the target FN which is specified in the Target FN Register. The status bit is set when PF driver sends the msg_send command. When the corresponding function driver sends acknowledgement through msg_rcv, the hardware clears this field. The PF driver is not allow to update any content in its outgoing mailbox memory (OMM) while o_msg_status(target_fn_id) is asserted. Any illegal writes to the OMM are discarded (optionally, case an error in the AXI4L response channel). |
| [0] | 0 | RO | i_msg_status | For VF: When asserted, a message in the VF's incoming Mailbox memory
is pending for process. The field is cleared after the VF driver
writes msg_rcv to its command register. For PF: When asserted, the messages in the incoming Mailbox memory are pending for process. The field is cleared only when the event queue is empty. |