cpu/urv: Fix Instruction Bus conversion to Wishbone and only keep it now that working.

litex/soc/cores/cpu/urv/core.py

@@ -119,23 +119,9 @@ class uRV(CPU):
 
         # uRV Instruction Bus.
         # --------------------
-        if True:
-            from litex.soc.integration.common import get_mem_data
-            self.rom      = Memory(32, depth=131072//4)
-            self.rom_port = self.rom.get_port()
-
-            self.sync += im_valid.eq(1),
-            self.comb += [
-                self.rom_port.adr.eq(im_addr[2:]),
-                im_data.eq(self.rom_port.dat_r),
-            ]
-        else:
-            # FIXME: Try to implement im_bus -> Wishbone correctly (if possible).
-            im_addr_d = Signal(32, reset=0xffffffff)
-            self.sync += im_addr_d.eq(im_addr)
         self.i_fsm = i_fsm = FSM(reset_state="IDLE")
         i_fsm.act("IDLE",
-                If(im_addr != im_addr_d,
+            If(im_rd,
                 NextValue(im_valid, 0),
                 NextState("READ")
             )

litex/soc/integration/builder.py

@@ -339,11 +339,6 @@ class Builder:
         # Initialize SoC with with BIOS data.
         self.soc.init_rom(name="rom", contents=bios_data)
 
-        # FIXME: Remove uRV ROM Init Workaround.
-        from litex.soc.cores.cpu.urv import uRV
-        if isinstance(self.soc.cpu, uRV):
-            self.soc.cpu.rom.init = bios_data
-
     def build(self, **kwargs):
         # Pass Output Directory to Platform.
         self.soc.platform.output_dir = self.output_dir