When the AXI awuser and aruser signals are
being used to carry other information in addition to SMID transport, the AXI Sideband Formatter
Utility IP
core restores the original value when the SMID
is extracted at the PS block interface. But if the user signal information also needs to
go to destinations other than the PS block, the core can also be used to restore the
original information without processing the SMID. By inserting an AXI Sideband Formatter
Utility IP
core in front of any AXI slave endpoint and
configuring it to perform SMID removal, the IP will strip the SMID and propagate the
original info to the slave.
For each AW or AR transfer, the SMID field is extracted from the low-order
position of awuser or aruser and the remainder (if any) is right-shifted and propagated.