build/lattice/diamond.py,platform.py: allows adding custom strategy

litex/build/lattice/diamond.py

@@ -121,6 +121,10 @@ class LatticeDiamondToolchain(GenericToolchain):
         for filename in self.platform.ips:
             tcl.append("prj_src add \"{}\" -work {}".format(tcl_path(filename), library))
 
+        # Add Strategy
+        for filename, strategy_name in self.platform.strategy:
+            tcl.append("prj_strgy import -name {} -file {}".format(strategy_name, tcl_path(filename)))
+
         # Set top level
         tcl.append("prj_impl option top \"{}\"".format(self._build_name))
 

litex/build/lattice/platform.py

@@ -24,6 +24,7 @@ class LatticePlatform(GenericPlatform):
     def __init__(self, *args, toolchain="diamond", **kwargs):
         GenericPlatform.__init__(self, *args, **kwargs)
         self.ips      = set()
+        self.strategy = set()
         if toolchain == "diamond":
             self.toolchain = diamond.LatticeDiamondToolchain()
         elif toolchain == "trellis":
@@ -41,6 +42,9 @@ class LatticePlatform(GenericPlatform):
     def add_ip(self, filename):
         self.ips.add((os.path.abspath(filename)))
 
+    def add_strategy(self, filename, strategy_name):
+        self.strategy.add((os.path.abspath(filename), strategy_name))
+
     def get_verilog(self, *args, special_overrides=dict(), **kwargs):
         so = dict()  # No common overrides between ECP5 and iCE40.
         so.update(self.toolchain.special_overrides)