Implement write buffering (#22)

src/peakrdl_regblock/write_buffering/storage_generator.py

@@ -0,0 +1,32 @@
+from typing import TYPE_CHECKING
+
+from systemrdl.node import FieldNode, RegNode
+
+from ..struct_generator import RDLStructGenerator
+
+if TYPE_CHECKING:
+    from . import WriteBuffering
+
+class WBufStorageStructGenerator(RDLStructGenerator):
+    def __init__(self, wbuf: 'WriteBuffering') -> None:
+        super().__init__()
+        self.wbuf = wbuf
+
+    def enter_Field(self, node: FieldNode) -> None:
+        # suppress parent class's field behavior
+        pass
+
+    def enter_Reg(self, node: RegNode) -> None:
+        super().enter_Reg(node)
+
+        if not node.get_property('buffer_writes'):
+            return
+
+        regwidth = node.get_property('regwidth')
+        self.add_member("data", regwidth)
+        self.add_member("biten", regwidth)
+        self.add_member("pending")
+
+        trigger = node.get_property('wbuffer_trigger')
+        if isinstance(trigger, RegNode) and trigger == node:
+            self.add_member("trigger_q")