HIPC: Difference between revisions
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There's a 4-bit flag in the main header controlling the behavior of C descriptors. | There's a 4-bit flag in the main header controlling the behavior of C descriptors. | ||
If it has value 0, the C descriptor functionality is disabled | If it has value 0, the C descriptor functionality is disabled. | ||
Otherwise it has (flag-2) C descriptors. | If it has value 1, there is an "inlined" C buffer after the raw data. Received data is copied to ROUND_UP(cmdbuf+raw_size+index, 16) | ||
If it has value 2, there is a single C descriptor. | |||
Otherwise it has (flag-2) C descriptors. In this case, index picks which C descriptor to copy received data to [instead of picking the offset into the buffer]. | |||
Data sent with this method must have MemoryState 0x4000000 mask set. | |||
After reply, X descriptors are written to the sender containing the address, size and index that were copied to. | |||
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