BROADCASTOUTER controls issuing coherent
transactions targeting the outer shareability domain on the coherent
interconnect. When BROADCASTOUTER is asserted,
the processor is considered to be part of the Outer Shareable
domain and any transaction that requires coherency with other masters
in this domain is broadcast on the ACE or CHI interface.
It is possible to assert BROADCASTOUTER
without asserting BROADCASTINNER. This selects
a configuration that limits coherent masters to sharing memory only in the outer
shareability domain. However,
can still share memory in the Inner Shareable domain.
When BROADCASTOUTER is deasserted, BROADCASTINNER must
also be deasserted.
When BROADCASTINNER and BROADCASTOUTER are
both deasserted, the processor does not issue coherent read
or write requests on the ACE AR and AW channels, or the CHI TXREQ channel.