ackID |
6'h00 |
Value is written by the Physical layer before the packet is transmitted on the RapidIO link. |
VC |
0 |
The RapidIO II IP core supports only VC0. |
CRF |
0 |
This bit sets packet priority together with prio if CRF is supported. This bit is reserved if VC=0 and CRF is not supported. |
prio[1:0] |
|
The IP core assigns to this field the value programmed in the PRIORITY field of the Tx Maintenance Mapping Window n Control register for the matching address translation window n. |
tt[1:0] |
2'b01 |
The value of 1 indicates 16-bit device IDs. |
ftype[3:0] |
4'b1000 |
The value of 8 indicates a Maintenance Class packet. |
destinationID[15:0] |
|
The IP core assigns to this field based on the values programmed in the LARGE_DESTINATION_ID and DESTINATION_ID fields of the Tx Maintenance Mapping Window n Control register for the matching address translation window n. |
sourceID[15:0] |
|
The IP core assigns to this field the value programmed in the Large_base_deviceID field of the Base Device ID register (offset 0x60). |
ttype[3:0] |
4'b0000 |
The value of 0 indicates a MAINTENANCE read request. |
rdsize[3:0] |
4'b1000 |
The size and wdptr values encode the maximum size of the payload field. In MAINTENANCE transactions, the value of rdsize is always 4’b1000, which decodes to a value of 4 bytes. |
srcTID[7:0] |
|
The RapidIO II IP core generates the source transaction ID value internally to track the transaction response. The value depends on the current state of the RapidIO II IP core when it prepares the RapidIO packet. |
config_offset[20:0] |
|
Depends on the value on the mnt_s_address bus, and the values programmed in the Tx Maintenance Address Translation Window registers. |
wdptr |
|
The IP core assigns to this field the negation of mnt_s_address[0]. |
hop_count |
|
The IP core assigns to this field the value programmed in the HOP_COUNT field of the Tx Maintenance Mapping Window n Control register for the matching address translation window n. |