Make data registers Message Registers. #728
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Message Registers allow data to be sent to the other side, but not to be read back by the side that wrote the data. This allows smaller FPGA implementations by duplicating the storage and removing muxes in the design. It is incompatible with old debuggers, if they use these registers in surprising ways.
pdonahue-ventana
requested changes
May 12, 2022
Co-authored-by: Paul Donahue <48959409+pdonahue-ventana@users.noreply.github.com>
Bits is more general, assuming less about the implementation.
pdonahue-ventana
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May 13, 2022
timsifive
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Sep 18, 2023
These were first introduced in #728. Hopefully I got everything.
timsifive
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Sep 18, 2023
These were first introduced in #728. Hopefully I got everything.
timsifive
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Sep 28, 2023
These were first introduced in #728. Hopefully I got everything.
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Message Registers allow data to be sent to the other side, but not to be
read back by the side that wrote the data.
This allows smaller FPGA implementations by duplicating the storage and
removing muxes in the design, addressing part of #717.
It is incompatible with old debuggers, if they use these registers in
surprising ways.