Altera RapidIO II MegaCore Function - Manual (Page 96)

4–54 Chapter 4: Functional Description
Logical Layer Interfaces
RapidIO II MegaCore Function August 2014 Altera Corporation
User Guide
Table 4–29 lists the fields of the gen_rx_hd_data bus.
Table 4–29. RapidIO Header Fields in gen_rx_hd_data Bus
Field gen_rx_hd_data Bits Value Comment
pd_size[8:0] [114:106] Size of payload data, in bytes.
VC [105] 0 The RapidIO II IP core supports only VC0.
CRF [104]
prio[1:0] [103:102]
tt[1:0] [101:100]
ftype[3:0] [99:96]
destinationID[15:0] [95:80]
For packets with an 8-bit device ID, bits [95:88] (bits
[15:8] of the destinationID) are set to 8’h00.
sourceID[15:0] [79:64]
When ftype[3:0] has the value of 7, this field is used
as the tgtDestinationID field.
For packets with an 8-bit device ID, bits [79:72] (bits
[15:8] of the sourceID) are set to 8’h00.
specific_header[63:0] [63:0]
Fields depend on the format type specified in ftype.
Refer to
Table 4–30 .