OBI

The repository contains a collection of SystemVerilog IPs for the OBI v1.6 standard.

They are designed by PULP-platform and are available under the Solderpad v0.51 license (See LICENSE).

Using the IPs

As the OBI protocol is very configurable, the IPs are designed to incorporate specific parameters for the design:

• ObiCfg: This specifies the configuration used for the OBI protocol being input or output from the link. A default config can be found in the obi_pkg.sv. This config should be aligned with the req and rsp structs.
• obi_req_t: The OBI request struct is designed to be generated with a macro available in the include/obi/typedef.svh include file and has fields for the handshake and a field for the A channel.
• obi_rsp_t: The OBI response struct is designed to be generated with a macro available in the include/obi/typedef.svh include file and has fields for the handshake and a filed for the R channel.

Most IPs will also support a SystemVerilog interface variant, also based on ObiCfg.

Available IPs

• obi_mux.sv: A multiplexer IP for the OBI protocol.
• obi_demux.sv: A demultiplexer IP for the OBI protocol.
• obi_xbar.sv: A crossbar interconnect IP for the OBI protocol.
• obi_err_sbr.sv: A error subordinate, responding with the error bit set.
• obi_sram_shim.sv: An adapter for a standard sram.
• obi_atop_resolver.sv: An atomics filter, resolving atomic operations on an exclusive bus.
• apb_to_obi.sv: A protocol converter from APB to OBI.
• obi_to_apb.sv: A protocol converter from OBI to APB.

License

Solderpad Hardware License, Version 0.51