lasmicon: better management of optional bandwidth module (automatically inserted by -Ot with_memtest True)

misoclib/mem/sdram/core/lasmicon/multiplexer.py

@@ -90,13 +90,13 @@ class _Steerer(Module):
 
 class Multiplexer(Module, AutoCSR):
 	def __init__(self, phy, geom_settings, timing_settings, bank_machines, refresher, dfi, lasmic,
-			with_bandwidth_measurement=False):
+			with_bandwidth=False):
 		assert(phy.settings.nphases == len(dfi.phases))
 
 		# Command choosing
 		requests = [bm.cmd for bm in bank_machines]
-		choose_cmd = _CommandChooser(requests)
-		choose_req = _CommandChooser(requests)
+		self.submodules.choose_cmd = choose_cmd = _CommandChooser(requests)
+		self.submodules.choose_req = choose_req = _CommandChooser(requests)
 		self.comb += [
 			choose_cmd.want_reads.eq(0),
 			choose_cmd.want_writes.eq(0)
@@ -106,7 +106,6 @@ class Multiplexer(Module, AutoCSR):
 				choose_cmd.want_cmds.eq(1),
 				choose_req.want_cmds.eq(1)
 			]
-		self.submodules += choose_cmd, choose_req
 
 		# Command steering
 		nop = CommandRequest(geom_settings.mux_a, geom_settings.bank_a)
@@ -212,5 +211,11 @@ class Multiplexer(Module, AutoCSR):
 		fsm.finalize()
 		self.comb += refresher.ack.eq(fsm.state == fsm.encoding["REFRESH"])
 
-		if with_bandwidth_measurement:
-			self.submodules.bandwidth = Bandwidth(choose_req.cmd)
+		self.with_bandwidth = with_bandwidth
+
+	def add_bandwidth(self):
+		self.with_bandwidth = True
+
+	def do_finalize(self):
+		if self.with_bandwidth:
+			self.submodules.bandwidth = Bandwidth(self.choose_req.cmd)

misoclib/soc/sdram.py

@@ -19,7 +19,8 @@ class SDRAMSoC(SoC):
 	def __init__(self, platform, clk_freq,
 			ramcon_type="lasmicon",
 			with_l2=True, l2_size=8192,
-			with_memtest=False,
+			with_bandwidth=False,	# specific to LASMICON,
+			with_memtest=False,     # ignored for MINICON
 			**kwargs):
 		SoC.__init__(self, platform, clk_freq, **kwargs)
 		self.ramcon_type = ramcon_type
@@ -28,6 +29,7 @@ class SDRAMSoC(SoC):
 		self.l2_size = l2_size
 
 		self.with_memtest = with_memtest
+		self.with_bandwidth = with_bandwidth or with_memtest
 
 		self._sdram_phy_registered = False
 
@@ -41,6 +43,9 @@ class SDRAMSoC(SoC):
 
 		# LASMICON frontend
 		if self.ramcon_type == "lasmicon":
+			if self.with_bandwidth:
+				self.sdram.controller.multiplexer.add_bandwidth()
+
 			if self.with_memtest:
 				self.submodules.memtest_w = memtest.MemtestWriter(self.sdram.crossbar.get_master())
 				self.submodules.memtest_r = memtest.MemtestReader(self.sdram.crossbar.get_master())