Initial Commit - Forked from PeakRDL-regblock @ a440cc19769069be831d267505da4f3789a26695

src/peakrdl_regblock/field_logic/sw_onread.py

@@ -0,0 +1,45 @@
+from typing import TYPE_CHECKING, List
+
+from systemrdl.rdltypes import OnReadType
+
+from .bases import NextStateConditional
+
+if TYPE_CHECKING:
+    from systemrdl.node import FieldNode
+
+class _OnRead(NextStateConditional):
+    onreadtype = None # type: OnReadType
+    def is_match(self, field: 'FieldNode') -> bool:
+        return field.get_property('onread') == self.onreadtype
+
+    def get_predicate(self, field: 'FieldNode') -> str:
+        if field.parent.get_property('buffer_reads'):
+            # Is buffered read. Use alternate strobe
+            rstrb = self.exp.read_buffering.get_trigger(field.parent)
+            return rstrb
+        else:
+            # is regular register
+            strb = self.exp.dereferencer.get_access_strobe(field)
+            return f"{strb} && !decoded_req_is_wr"
+
+
+class ClearOnRead(_OnRead):
+    comment = "SW clear on read"
+    onreadtype = OnReadType.rclr
+
+    def get_assignments(self, field: 'FieldNode') -> List[str]:
+        return [
+            "next_c = '0;",
+            "load_next_c = '1;",
+        ]
+
+
+class SetOnRead(_OnRead):
+    comment = "SW set on read"
+    onreadtype = OnReadType.rset
+
+    def get_assignments(self, field: 'FieldNode') -> List[str]:
+        return [
+            "next_c = '1;",
+            "load_next_c = '1;",
+        ]