Rename it to be ProxyPtr and ConstProxyPtr, merge it with the functionality of BufferArg and TypedBufferArg, etc., as described in this design doc. https://docs.google.com/document/d/1BYHBJcf7dB2Z25zAZ9snbeRKfstK9uERYH_3h66w_tc/ Change-Id: I2fddde20cc0ece257685bc50bd3419a4e9a00145 Reviewed-on: https://gem5-review.googlesource.com/c/public/gem5/+/29400 Reviewed-by: Ciro Santilli <ciro.santilli@arm.com> Reviewed-by: Matthew Poremba <matthew.poremba@amd.com> Maintainer: Gabe Black <gabeblack@google.com> Tested-by: kokoro <noreply+kokoro@google.com>