def build_advanced_sv(
    regs: list,
    target_src: pathlib.Path,
    board_type: str = "75t",
    enable_variance: bool = True,
    variance_metadata: Optional[dict] = None,
    advanced_features: Optional[dict] = None,
) -> None:
    """Generate advanced SystemVerilog BAR controller with comprehensive features."""

    # Import classes from this module (they're defined above)
    # AdvancedSVGenerator, PowerManagementConfig, etc. are already available

    # Configure advanced features based on board type and requirements
    board_config = BOARD_INFO[board_type]
    device_class_str = board_config["device_class"]
    base_freq = board_config["base_frequency_mhz"]

    # Map string to DeviceClass enum
    device_class_map = {
        "consumer": DeviceClass.CONSUMER,
        "enterprise": DeviceClass.ENTERPRISE,
        "industrial": DeviceClass.INDUSTRIAL,
        "automotive": DeviceClass.AUTOMOTIVE,
    }
    device_class = device_class_map.get(device_class_str, DeviceClass.CONSUMER)

    # Configure advanced features
    power_config = PowerManagementConfig(
        enable_clock_gating=True,
        enable_aspm=True,
    {# Safely resolve transition cycle values from the template context with sensible fallbacks #}
    {%- set d0_to_d1 = power_management.transition_cycles.d0_to_d1 if (power_management is defined and power_management.transition_cycles is defined and power_management.transition_cycles.d0_to_d1 is defined) else (transition_cycles.d0_to_d1 if (transition_cycles is defined and transition_cycles.d0_to_d1 is defined) else 100) -%}
    {%- set d1_to_d0 = power_management.transition_cycles.d1_to_d0 if (power_management is defined and power_management.transition_cycles is defined and power_management.transition_cycles.d1_to_d0 is defined) else (transition_cycles.d1_to_d0 if (transition_cycles is defined and transition_cycles.d1_to_d0 is defined) else 200) -%}
    d0_to_d1_cycles={{ d0_to_d1 }},
    d1_to_d0_cycles={{ d1_to_d0 }}
    )

    error_config = ErrorHandlingConfig(
        enable_ecc=True,
        enable_parity_check=True,
        enable_crc_check=True,
        enable_auto_retry=True,
        max_retry_count=3
    )

    perf_config = PerformanceCounterConfig(
        enable_transaction_counters=True,
        enable_bandwidth_monitoring=True,
        enable_latency_measurement=False,
        enable_latency_tracking=False,
        enable_error_rate_tracking=True
    )

    device_config = DeviceSpecificLogic(
        device_type=DeviceType.GENERIC,
        device_class=device_class,
        base_frequency_mhz=base_freq
    )

    # Override with user-provided advanced features
    if advanced_features:
        if "device_type" in advanced_features:
            device_config.device_type = DeviceType(advanced_features["device_type"])
        if "enable_power_management" in advanced_features:
            power_config.enable_clock_gating = advanced_features["enable_power_management"]
        if "enable_error_handling" in advanced_features:
            error_config.enable_auto_retry = advanced_features["enable_error_handling"]

    # Initialize variance simulator if enabled
    variance_model = None
    if enable_variance:
        variance_simulator = ManufacturingVarianceSimulator()
        device_id = variance_metadata.get("device_id", f"board_{board_type}") if variance_metadata else f"board_{board_type}"
        variance_model = variance_simulator.generate_variance_model(
            device_id=device_id,
            device_class=device_class,
            base_frequency_mhz=base_freq
        )
        print(f"[*] Advanced variance simulation enabled for {% if device_class is string %}{{ device_class }}{% elif device_class is mapping %}{{ device_class.get('value', device_class.get('name', 'consumer')) }}{% else %}{{ device_class.value }}{% endif %} class device")

    # Generate advanced SystemVerilog
    generator = AdvancedSVGenerator(power_config, error_config, perf_config, device_config)
    sv_content = generator.generate_advanced_systemverilog(regs, variance_model)

    # Write to output and target locations
    (OUT / "advanced_bar_controller.sv").write_text(sv_content)
    shutil.copyfile(OUT / "advanced_bar_controller.sv", target_src)

    print("[*] Advanced SystemVerilog generation complete!")
    print(f"    - Power management: {power_config.enable_clock_gating}")
    print(f"    - Error handling: {error_config.enable_auto_retry}")
    print(f"    - Performance counters: {perf_config.enable_transaction_counters}")
    print(f"    - Device type: {% if device_config.device_type is string %}{{ device_config.device_type }}{% elif device_config.device_type is mapping %}{{ device_config.device_type.get('value', device_config.device_type.get('name', 'generic')) }}{% else %}{{ device_config.device_type.value }}{% endif %}")