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Confusion about tlm_dmi::m_dmi_ptr and tlm_dmi::m_dmi_start_address

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I feel confused about m_dmi_ptr and m_dmi_start_address. Which one should I use for transferring data at the initiator side after get_direct_mem_ptr call? All examples I see use m_dmi_ptr? But what's the purpose of m_dmi_start_address? Are m_dmi_start_address and m_dmi_end_address of any significance for the initiator?

Thanks if anybody could help me out here.


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