18.104.22.168. Metadata Support
Metadata is the 8 byte private data, which the Host wants to send to the device in H2D direction and the device wants to send to Host in D2H direction. In case of AVMM interface, both srcaddr and dstaddr fields are used. In case of AVST interface, dstaddr in H2D, srcaddr in D2H are used to store private meta data. As both addresses are used in AVMM, metadata support is not available if AVMM is enabled.
|Field Name in Descriptor||Descriptor (Avalon-ST)|
H2D - source address of data in host
D2H - 64-bit metadatada
H2D - 64-bit metadata
D2H – destination address of data in host
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