From 9c443b475f525123853f1036be8964c233b5cad6 Mon Sep 17 00:00:00 2001
From: Luke Kenneth Casson Leighton <lkcl@lkcl.net>
Date: Fri, 23 Apr 2021 19:18:06 +0100
Subject: [PATCH] add mmu test

---
 src/openpower/test/mmu/test_issuer_mmu_rom.py | 68 +++++++++++++++++++
 1 file changed, 68 insertions(+)
 create mode 100644 src/openpower/test/mmu/test_issuer_mmu_rom.py

diff --git a/src/openpower/test/mmu/test_issuer_mmu_rom.py b/src/openpower/test/mmu/test_issuer_mmu_rom.py
new file mode 100644
index 00000000..7d4e7ef1
--- /dev/null
+++ b/src/openpower/test/mmu/test_issuer_mmu_rom.py
@@ -0,0 +1,68 @@
+from nmigen import Module, Signal
+from soc.simple.test.test_runner import TestRunner
+from openpower.simulator.program import Program
+from openpower.endian import bigendian
+import unittest
+
+from openpower.test.common import (TestAccumulatorBase, skip_case)
+
+def b(x):
+    return int.from_bytes(x.to_bytes(8, byteorder='little'),
+                          byteorder='big', signed=False)
+
+
+default_mem = { 0x10000:    # PARTITION_TABLE_2
+                       # PATB_GR=1 PRTB=0x1000 PRTS=0xb
+                b(0x800000000100000b),
+
+                0x30000:     # RADIX_ROOT_PTE
+                        # V = 1 L = 0 NLB = 0x400 NLS = 9
+                b(0x8000000000040009),
+
+                0x40000:     # RADIX_SECOND_LEVEL
+                        # 	   V = 1 L = 1 SW = 0 RPN = 0
+                           # R = 1 C = 1 ATT = 0 EAA 0x7
+                b(0xc000000000000187),
+
+                0x1000000:   # PROCESS_TABLE_3
+                       # RTS1 = 0x2 RPDB = 0x300 RTS2 = 0x5 RPDS = 13
+                b(0x40000000000300ad),
+            }
+
+
+class MMUTestCaseROM(TestAccumulatorBase):
+    # MMU on microwatt handles MTSPR, MFSPR, DCBZ and TLBIE.
+    # libre-soc has own SPR unit
+    # libre-soc MMU supports MTSPR and MFSPR but **ONLY** for the subset
+    # of SPRs it actually does.
+    # other instructions here -> must be load/store
+
+    def case_mmu_ldst(self):
+        lst = [
+                #"mtspr 720, 1", # XXX do not execute unsupported instructions
+                "lhz 3, 0(1)"      # load some data
+              ]
+
+        initial_regs = [0] * 32
+        
+        # set process table
+        prtbl = 0x1000000
+        initial_regs[1] = prtbl
+        
+        initial_sprs = {'DSISR': 0, 'DAR': 0,
+                         720: 0}
+        self.add_case(Program(lst, bigendian),
+                      initial_regs, initial_sprs)
+
+
+
+
+if __name__ == "__main__":
+    unittest.main(exit=False)
+    suite = unittest.TestSuite()
+    suite.addTest(TestRunner(MMUTestCaseROM().test_data, microwatt_mmu=True,
+                             rom=default_mem))
+    runner = unittest.TextTestRunner()
+    runner.run(suite)
+
+#  soc/simple/test/test_runner.py
-- 
2.30.2