How to clean the rpmb in the emmc? rpmb 如何清理

Hi, I’m reading the document Rockchip_Developer_Guide_TEE_SDK.

In subsection 3.4.3.2, “If you use rpmb, you need to contact technical support to provide special firmware to clear the old data in rpmb”.

Does the radxa provide this firmware, or how can I clean the rpmb?

Thanks!