fill in more hwif utility functions for dereferencer

peakrdl/regblock/field_logic/sw_onwrite.py

@@ -0,0 +1,107 @@
+from typing import TYPE_CHECKING, List
+
+from systemrdl.rdltypes import OnWriteType
+
+from .bases import NextStateConditional
+
+if TYPE_CHECKING:
+    from systemrdl.node import FieldNode
+
+class _OnWrite(NextStateConditional):
+    onwritetype = None
+    def is_match(self, field: 'FieldNode') -> bool:
+        return field.get_property("onwrite") == self.onwritetype
+
+    def get_conditional(self, field: 'FieldNode') -> str:
+        strb = self.exporter.dereferencer.get_access_strobe(field)
+        return f"decoded_req && decoded_req_is_wr && {strb}"
+
+class WriteOneSet(_OnWrite):
+    onwritetype = OnWriteType.woset
+
+    def get_assignments(self, field: 'FieldNode') -> List[str]:
+        field_path = self.get_field_path(field)
+        return [
+            f"field_combo.{field_path}.next = field_storage.{field_path} | decoded_wr_data;",
+            f"field_combo.{field_path}.load_next = '1;",
+        ]
+
+class WriteOneClear(_OnWrite):
+    onwritetype = OnWriteType.woclr
+
+    def get_assignments(self, field: 'FieldNode') -> List[str]:
+        field_path = self.get_field_path(field)
+        return [
+            f"field_combo.{field_path}.next = field_storage.{field_path} & ~decoded_wr_data;",
+            f"field_combo.{field_path}.load_next = '1;",
+        ]
+
+class WriteOneToggle(_OnWrite):
+    onwritetype = OnWriteType.wot
+
+    def get_assignments(self, field: 'FieldNode') -> List[str]:
+        field_path = self.get_field_path(field)
+        return [
+            f"field_combo.{field_path}.next = field_storage.{field_path} ^ decoded_wr_data;",
+            f"field_combo.{field_path}.load_next = '1;",
+        ]
+
+class WriteZeroSet(_OnWrite):
+    onwritetype = OnWriteType.wzs
+
+    def get_assignments(self, field: 'FieldNode') -> List[str]:
+        field_path = self.get_field_path(field)
+        return [
+            f"field_combo.{field_path}.next = field_storage.{field_path} | ~decoded_wr_data;",
+            f"field_combo.{field_path}.load_next = '1;",
+        ]
+
+class WriteZeroClear(_OnWrite):
+    onwritetype = OnWriteType.wzc
+
+    def get_assignments(self, field: 'FieldNode') -> List[str]:
+        field_path = self.get_field_path(field)
+        return [
+            f"field_combo.{field_path}.next = field_storage.{field_path} & decoded_wr_data;",
+            f"field_combo.{field_path}.load_next = '1;",
+        ]
+
+class WriteZeroToggle(_OnWrite):
+    onwritetype = OnWriteType.wzt
+
+    def get_assignments(self, field: 'FieldNode') -> List[str]:
+        field_path = self.get_field_path(field)
+        return [
+            f"field_combo.{field_path}.next = field_storage.{field_path} ^ ~decoded_wr_data;",
+            f"field_combo.{field_path}.load_next = '1;",
+        ]
+
+class WriteClear(_OnWrite):
+    onwritetype = OnWriteType.wclr
+
+    def get_assignments(self, field: 'FieldNode') -> List[str]:
+        field_path = self.get_field_path(field)
+        return [
+            f"field_combo.{field_path}.next = '0;",
+            f"field_combo.{field_path}.load_next = '1;",
+        ]
+
+class WriteSet(_OnWrite):
+    onwritetype = OnWriteType.wset
+
+    def get_assignments(self, field: 'FieldNode') -> List[str]:
+        field_path = self.get_field_path(field)
+        return [
+            f"field_combo.{field_path}.next = '1;",
+            f"field_combo.{field_path}.load_next = '1;",
+        ]
+
+class Write(_OnWrite):
+    onwritetype = None
+
+    def get_assignments(self, field: 'FieldNode') -> List[str]:
+        field_path = self.get_field_path(field)
+        return [
+            f"field_combo.{field_path}.next = decoded_wr_data;",
+            f"field_combo.{field_path}.load_next = '1;",
+        ]