Added PTW test cases (#150)

* ptw first commit, test_pwt_reset_smoke

$ make test target=ut_frontend/l2tlb/ptw/

several signals are not zero during reset, such as io_perf_*

* add test_ptw_ptwcache_req_sv39_l2l1miss_nos2xlate_smoke

* add test_ptw_ptwcache_req_sv39_l2hit_nos2xlate

* Add PTW test cases covering 2MB and 1GB page sizes.

test_ptw_ptwcache_req_sv39_l2miss_nos2xlate_1gbpage PASSED
test_ptw_ptwcache_req_sv39_l2l1miss_nos2xlate_2mbpage PASSED
test_ptw_ptwcache_req_sv39_l2hit_nos2xlate_2mbpage PASSED

* update README.md

* update README.md

* Delete the classic_version directory

and split test cases into separate files.

* change PTW settings in xiangshan-kmh.yaml

* Fix build_ut_frontend_l2tlb_ptw.py. Move bundle.py to bundle/

Fix configs/dutree/xiangshan-kmh.yaml by changing PTW to lowercase.

* Add page fault checks for large-page (2MB/1GB) PPN misalignment.

Add test cases:

test_ptw_ptwcache_req_sv39_l2hit_nos2xlate_2mbpage_ppn_misaligned
test_ptw_ptwcache_req_sv39_l2miss_nos2xlate_1gbpage_ppn_misaligned
test_ptw_ptwcache_req_sv39_l2l1miss_nos2xlate_2mbpage_ppn_misaligned

Author: whensungoesdown

configs/dutree/xiangshan-kmh.yaml

@@ -101,6 +101,11 @@ children:
         desc: "指令非缓存"
       - name: "itlb"
         desc: "指令TLB"
+      - name: "l2tlb"
+        desc: "l2 TLB"
+        children: 
+          - name: "ptw"
+            desc: "Page Table Walker模块"
       - name: "pmp"
         desc: "物理内存保护"
   - name: "backend"
@@ -242,8 +247,6 @@ children:
             desc: "向量长度合并缓冲器"
           - name: "vs_merge_buffer"
             desc: "向量段合并缓冲器"
-      - name: "ptw"
-        desc: "页表Walker"
       - name: "uncache"
         desc: "非缓存"
       - name: "sbuffer"

scripts/build_ut_frontend_l2tlb_ptw.py

@@ -0,0 +1,64 @@
+#coding=utf8
+#***************************************************************************************
+# This project is licensed under Mulan PSL v2.
+# You can use this software according to the terms and conditions of the Mulan PSL v2.
+# You may obtain a copy of Mulan PSL v2 at:
+#          http://license.coscl.org.cn/MulanPSL2
+#
+# THIS SOFTWARE IS PROVIDED ON AN "AS IS" BASIS, WITHOUT WARRANTIES OF ANY KIND,
+# EITHER EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO NON-INFRINGEMENT,
+# MERCHANTABILITY OR FIT FOR A PARTICULAR PURPOSE.
+#
+# See the Mulan PSL v2 for more details.
+#**************************************************************************************/
+
+
+import os
+from comm import warning, info, get_all_rtl_files
+
+
+def build(cfg):
+    # import base modules
+    from tempfile import NamedTemporaryFile
+    from toffee_test.markers import match_version
+    from comm import is_all_file_exist, get_rtl_dir, exe_cmd, get_root_dir
+    # check version
+    if not match_version(cfg.rtl.version, "openxiangshan-kmh-*"):
+        warning("frontend_l2tlb_ptw: %s" % f"Unsupported RTL version {cfg.rtl.version}")
+        return False
+    # check files
+    f = is_all_file_exist(["rtl/PTW.v"], get_rtl_dir(cfg=cfg))
+    assert f is True, f"File {f} not found"
+    # find source files for PTW
+    rtl_files = get_all_rtl_files("PTW", cfg=cfg)
+    info(f"rtl_files: {rtl_files}")
+    assert rtl_files, "Cannot find RTL files of PTW"
+
+    # build
+    # export PTW.v
+    if not os.path.exists(get_root_dir("dut/PTW")):
+        info("Exporting PTW.sv")
+        with NamedTemporaryFile("w+", encoding="utf-8", suffix=".txt") as filelist:
+            filelist.write("\n".join(rtl_files))
+            filelist.flush()
+            s, _, err = exe_cmd(
+                f"picker export --cp_lib false {rtl_files[0]} --fs {filelist.name} --lang python --tdir " 
+                f"{get_root_dir('dut')}/ -w PTW.fst -c")
+        assert s, err
+    return True
+
+
+def get_metadata():
+    return {
+        "dut_name": "frontend_l2tlb_ptw",
+        "dut_dir": "PTW",
+        "test_targets": [
+            "ut_frontend/l2tlb/ptw",
+            "ut_frontend/l2tlb",
+            "ut_frontend"
+        ]
+    }
+
+
+def line_coverage_files(cfg):
+    return ["PTW.v"]