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The problem to make C6678 device regs accessible from SRIO

Hi TI engineer,

       In one application we need to config a C6678 through the SRIO.But we find the access to some registers is invalid(like IPC,BOOT_ADDR,PSC regs).We thought  that we need to make the access in supervisor mode.But when we try to access the RIO_SUPERVSOR_ID reg to set it,we find we can not change the value of it.

       So we ask for help on 2 questions:

       1. Is we fail to configure the registers before because we don't give srio interface the supervisor mode?

        2. why can't we set the value of RIO_SUPERVSOR_ID?what do we need to do before that?