frontend/axi: add assert on axi.address_width and base_address

litedram/frontend/axi.py

@@ -31,6 +31,7 @@ class LiteDRAMAXIPort(AXIInterface):
 
 class LiteDRAMAXI2NativeW(Module):
     def __init__(self, axi, port, buffer_depth, base_address):
+        assert axi.address_width >= log2_int(base_address)
         self.cmd_request = Signal()
         self.cmd_grant = Signal()
 
@@ -97,6 +98,7 @@ class LiteDRAMAXI2NativeW(Module):
 
 class LiteDRAMAXI2NativeR(Module):
     def __init__(self, axi, port, buffer_depth, base_address):
+        assert axi.address_width >= log2_int(base_address)
         self.cmd_request = Signal()
         self.cmd_grant = Signal()