Wishbone: omit fixed LSBs

m-labs · Jan 13, 2012 · f8d5c27 · f8d5c27
1 parent 570ea8c
commit f8d5c27
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Showing 2 changed files with 7 additions and 5 deletions.
diff --git a/milkymist/lm32/__init__.py b/milkymist/lm32/__init__.py
@@ -8,7 +8,7 @@ def __init__(self):
 		self.interrupt = Signal(BV(32))
 		self.ext_break = Signal()
 		self._inst = Instance("lm32_top",
-			[("I_ADR_O", i.adr_o),
+			[("I_ADR_O", BV(32)),
 			("I_DAT_O", i.dat_o),
 			("I_SEL_O", i.sel_o),
 			("I_CYC_O", i.cyc_o),
@@ -17,7 +17,7 @@ def __init__(self):
 			("I_CTI_O", i.cti_o),
 			("I_LOCK_O", BV(1)),
 			("I_BTE_O", i.bte_o),
-			("D_ADR_O", d.adr_o),
+			("D_ADR_O", BV(32)),
 			("D_DAT_O", d.dat_o),
 			("D_SEL_O", d.sel_o),
 			("D_CYC_O", d.cyc_o),
@@ -44,6 +44,8 @@ def __init__(self):
 	def get_fragment(self):
 		comb = [
 			self._inst.ins["I_RTY_I"].eq(0),
-			self._inst.ins["D_RTY_I"].eq(0)
+			self._inst.ins["D_RTY_I"].eq(0),
+			self.ibus.adr_o.eq(self._inst.outs["I_ADR_O"][2:]),
+			self.dbus.adr_o.eq(self._inst.outs["D_ADR_O"][2:])
 		]
 		return Fragment(comb=comb, instances=[self._inst])
diff --git a/milkymist/norflash/__init__.py b/milkymist/norflash/__init__.py
@@ -11,10 +11,10 @@ def __init__(self, adr_width, rd_timing):
 		self.we_n = Signal()
 		self.ce_n = Signal()
 		self.timeline = timeline.Inst(self.bus.cyc_i & self.bus.stb_i,
-			[(0, [self.adr.eq(Cat(0, self.bus.adr_i[2:adr_width]))]),
+			[(0, [self.adr.eq(Cat(0, self.bus.adr_i[:adr_width-2]))]),
 			(rd_timing, [
 				self.bus.dat_o[16:].eq(self.d),
-				self.adr.eq(Cat(1, self.bus.adr_i[2:adr_width]))]),
+				self.adr.eq(Cat(1, self.bus.adr_i[:adr_width-2]))]),
 			(2*rd_timing, [
 				self.bus.dat_o[:16].eq(self.d),
 				self.bus.ack_o.eq(1)]),