a5c-ai/uvm-methodology

UVM Methodology Skill

Overview

Expert skill for Universal Verification Methodology (UVM) development following IEEE 1800.2 standards for comprehensive FPGA verification.

Capabilities

• Generate UVM agent architecture (driver, monitor, sequencer)
• Create UVM environments and scoreboards
• Implement uvm_sequence and virtual sequences
• Configure UVM factory and config_db
• Implement functional coverage with covergroups
• Design UVM register models (RAL)
• Apply UVM phasing and objections correctly
• Debug UVM testbenches effectively

Target Processes

• uvm-testbench.js
• constrained-random-verification.js
• testbench-development.js

Usage Guidelines

Agent Architecture

• Driver: Converts sequence items to pin-level activity
• Monitor: Observes DUT interface and creates transactions
• Sequencer: Routes sequence items to driver
• Agent: Contains driver, monitor, sequencer; configurable active/passive

Environment Structure

• Top-level environment contains agents and scoreboard
• Scoreboard performs reference model comparison
• Config objects distribute configuration
• Virtual sequencer coordinates multiple agents

Sequence Development

• Extend from uvm_sequence#(item_type)
• Use start_item() / finish_item() paradigm
• Create layered sequences for complex scenarios
• Use virtual sequences for multi-agent coordination

Coverage Strategy

• Embed covergroups in monitors
• Sample on transaction completion
• Cross functional coverage points
• Track coverage closure progress

Best Practices

• Use factory for all component creation
• Configure via config_db, not constructors
• Raise/drop objections properly
• Use UVM reporting macros consistently

Dependencies

• UVM 1.2 or UVM IEEE 1800.2 library
• SystemVerilog expertise
• Verification methodology knowledge