CPUIF Passthrough

This CPUIF mode bypasses the protocol converter stage and directly exposes the internal CPUIF handshake signals to the user.

• Command line: --cpuif passthrough

• Class: peakrdl_etana.cpuif.passthrough.PassthroughCpuif

For more details on the protocol itself, see: Internal CPUIF Protocol.

Error Response Support

The Passthrough interface supports error response generation via rd_err and wr_err signals:

• When --err-if-bad-addr is enabled, accessing unmapped addresses asserts the error signal

• When --err-if-bad-rw is enabled, forbidden reads/writes assert the error signal

Validated with external components - The test_cpuif_err_rsp test validates Passthrough error responses with both internal registers and external registers/memories.