Intel® Stratix® 10 Hard Processor System Technical Reference Manual
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4.7.2. Disabling the FPGA-to-HPS Interface to CCU
Intel® recommends that you properly disable the FPGA-to-HPS interface to the CCU before reconfiguring the FPGA. Before reconfiguration, software must disable the interface using the CCC Active Agent Vector (agent_ccc0_ccc_active_vector_0) register. Your software must poll the CCC Disable Status (agent_ccc0_ccc_agent_disable_status) register to check for pending snoop requests prior to disabling the interface.