feat: add AXI4 interconnect testbench and enhance existing tests

- Introduced a new testbench for the AXI4 interconnect () to validate fault classification for decode and access errors.
- Updated  and  to reflect changes in bus naming conventions.
- Enhanced  to include AXI4-Stream interface checks and validate stream data transfers.
- Modified  to integrate AXI4-Stream interfaces for improved DMA testing.
- Added new Python tests () to verify AXI4 to RIBP burst bridge functionality and interconnect fault classification.
- Updated existing tests to include AXI4 interfaces and ensure proper error handling and response validation.
- Adjusted memory map generation and test setups to accommodate new AXI4 interface requirements.

tests/test_axi4.py

@@ -0,0 +1,113 @@
+"""Directed tests for the active AXI4 fabric adapters."""
+
+from __future__ import annotations
+
+import os
+import shutil
+import subprocess
+import sys
+from pathlib import Path
+
+
+ROOT = Path(__file__).resolve().parents[1]
+
+
+def test_axi42ribp_supports_bursts_backpressure_and_errors(tmp_path: Path) -> None:
+    verilator = shutil.which("verilator")
+    if verilator is None:
+        return
+
+    output = tmp_path / "axi42ribp_burst_tb"
+    ccache_tmp = tmp_path / "ccache"
+    ccache_tmp.mkdir()
+    subprocess.run(
+        [
+            verilator,
+            "--binary",
+            "--timing",
+            "-Wno-fatal",
+            "--top-module",
+            "axi42ribp_burst_tb",
+            "-I" + str(ROOT / "rtl/managed/clusterip/common/rtl"),
+            "-I" + str(ROOT / "rtl/managed/clusterip/common/rtl/interface"),
+            str(ROOT / "rtl/managed/clusterip/common/rtl/interface/axi4_if.sv"),
+            str(ROOT / "rtl/managed/clusterip/common/rtl/interface/ribp_if.sv"),
+            str(ROOT / "rtl/managed/clusterip/common/rtl/utils/register.sv"),
+            str(ROOT / "rtl/mini/top/axi42ribp_burst.sv"),
+            str(ROOT / "tests/rtl/axi42ribp_burst_tb.sv"),
+            "-Mdir",
+            str(tmp_path / "obj"),
+            "-o",
+            str(output),
+        ],
+        check=True,
+        text=True,
+        capture_output=True,
+        env={
+            **os.environ,
+            "CCACHE_DIR": str(ccache_tmp),
+            "CCACHE_TEMPDIR": str(ccache_tmp),
+        },
+    )
+    result = subprocess.run([output], check=True, text=True, capture_output=True)
+    assert "AXI4 to RIBP burst bridge test passed" in result.stdout
+
+
+def test_axi4_interconnect_classifies_decode_protocol_and_access_errors(
+    tmp_path: Path,
+) -> None:
+    verilator = shutil.which("verilator")
+    if verilator is None:
+        return
+
+    memory_map = tmp_path / "memory_map"
+    subprocess.run(
+        [
+            sys.executable,
+            str(ROOT / "rtl/mini/address_map/generate_memory_map.py"),
+            "--map",
+            str(ROOT / "rtl/mini/address_map/memory_map.json"),
+            "--output-dir",
+            str(memory_map),
+            "--have-sram-if",
+            "NO",
+        ],
+        check=True,
+    )
+    output = tmp_path / "axi4_interconnect_tb"
+    ccache_tmp = tmp_path / "ccache"
+    ccache_tmp.mkdir()
+    subprocess.run(
+        [
+            verilator,
+            "--binary",
+            "--timing",
+            "-Wno-fatal",
+            "--top-module",
+            "axi4_interconnect_tb",
+            "-I" + str(memory_map / "rtl"),
+            "-I" + str(ROOT / "rtl/mini/top"),
+            "-I" + str(ROOT / "rtl/managed/clusterip/common/rtl"),
+            "-I" + str(ROOT / "rtl/managed/clusterip/common/rtl/interface"),
+            str(ROOT / "rtl/managed/clusterip/common/rtl/interface/axi4_if.sv"),
+            str(ROOT / "rtl/managed/clusterip/common/rtl/utils/register.sv"),
+            str(ROOT / "rtl/managed/clusterip/common/rtl/stream/round_robin_arbiter.sv"),
+            str(ROOT / "rtl/mini/top/axi4_interconnect.sv"),
+            str(ROOT / "rtl/mini/top/axi4_error_slave.sv"),
+            str(ROOT / "tests/rtl/axi4_interconnect_tb.sv"),
+            "-Mdir",
+            str(tmp_path / "obj"),
+            "-o",
+            str(output),
+        ],
+        check=True,
+        text=True,
+        capture_output=True,
+        env={
+            **os.environ,
+            "CCACHE_DIR": str(ccache_tmp),
+            "CCACHE_TEMPDIR": str(ccache_tmp),
+        },
+    )
+    result = subprocess.run([output], check=True, text=True, capture_output=True)
+    assert "AXI4 interconnect fault classification test passed" in result.stdout