S2MM_APP4 (S2MM User Application Field 4) - 7.1 English

AXI DMA LogiCORE IP Product Guide (PG021)

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7.1 English

This value provides User Application 4 field space for S2MM received status on the Status Stream.

Figure 2-35: S2MM_APP4

X-Ref Target - Figure 2-35

Table 2-40: User Application 4 Details


Field Name


31 to 0

APP4 / RxLength

User Application field 4 and Receive Byte Length. If Use RxLength In Status Stream is not enabled, this field functions identically to APP0 to APP3 in that the status data received on the AXI Status Stream is stored into the APP4 field of the End of Frame (EOF) Descriptor.

This field has a dual purpose when Use RxLength in Status Stream is enabled. The first least significant bits specified in the Buffer Length Register Width specify the total number of receive bytes for a packet that were received on the S2MM primary data stream. Second, the remaining most significant bits are User Application data.