This set of functions provides PPE-initiated DMA functionality (see
Cell
Broadband Engine Architecture, MFC Proxy Commands) through the usage
of the SPE MFC Proxy Command Issue facility. Main threads can use these functions
to move data to and from an SPE local store area.
Note: The naming of the
commands is based on a SPE centric view, for example, "put" means a transfer
from the SPE local store to an effective address valid in the main thread.