Base

This tree contains the foundational RTL used by the rest of SURF. Top-level base/ruckus.tcl loads each base library area.

Layout

• general/: common packages and generic utilities such as StdRtlPkg, arbiters, muxes, reset pipelines, gearboxes, counters, and watchdog/reset helpers.
• sync/: clock-domain crossing, synchronizers, reset synchronizers, trigger-rate, status, and frequency measurement helpers.
• fifo/: synchronous, asynchronous, muxing, cascade, FWFT, and output-pipeline FIFO blocks.
• ram/: inferred and Xilinx RAM implementations.
• delay/: fixed, RAM-backed, and FIFO-backed delay blocks.
• crc/: CRC packages and implementations.

Most modules use SURF package aliases such as sl and slv, _G generics, _C constants, and the local RegType/REG_INIT_C registered-process style. Reuse these base modules rather than duplicating CDC, FIFO, RAM, reset, or CRC logic in higher-level subsystems.