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The SASS supports mixed-endianess operating mode such that the channel is created and configured by the master processor, (e.g. ARM which is outside of SoC), while the data processing is handled by slave processor(s) (e.g. DSPs). When in this mode, SA LLD must create and maintain a shadow instance, which is a copy of the master instance with opposite endianess. New APIs are created to query the shadow instances, which should be passed to and used by the slave processor(s).