Add intiial 64-bit addressing support for Bus Mastering (Only for 64-bit datapath for now). - Githubissues

enjoy-digital / litepcie

Small footprint and configurable PCIe core

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Add intiial 64-bit addressing support for Bus Mastering (Only for 64-bit datapath for now). #93

Closed enjoy-digital closed 2 years ago

enjoy-digital commented 2 years ago

Add configurable address-width on DMA descriptors.
Add address_width parameters to layout/Endpoint/Crossbar to allow passing the 64-bit addresses from frontend ports (ex DMAs).
Add 64-bit (4DWs Header) support to Packetizer.
Adapt simulation and test for 32-bit/64-bit addressing.

Limitations:

4DWs Packetizer only implemented for 64-bit data-width for now.
When 64-bit addressing support is enabled, requests are always generated in 64-bit format (4DWs). Dynamic switch from 3DWs to 4DWs could be implemented when the 32-MSBs are zeros.
64-bit addressing support not implemented for Root -> Device path.