MVXPSEC_SRAM_PAYLOAD_DA
enc_start = MVXPSEC_SRAM_PAYLOAD_DA(mv_p->enc_off);
iv_offset = MVXPSEC_SRAM_PAYLOAD_DA(mv_p->enc_ivoff);
mac_start = MVXPSEC_SRAM_PAYLOAD_DA(mv_p->mac_off);
mac_offset = MVXPSEC_SRAM_PAYLOAD_DA(mv_p->mac_dst);